CN104795986A - Power conversion device with common-mode noise suppression function - Google Patents
Power conversion device with common-mode noise suppression function Download PDFInfo
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- CN104795986A CN104795986A CN201410020818.XA CN201410020818A CN104795986A CN 104795986 A CN104795986 A CN 104795986A CN 201410020818 A CN201410020818 A CN 201410020818A CN 104795986 A CN104795986 A CN 104795986A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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Abstract
The invention provides a power conversion device with a common-mode noise suppression function, at least comprising a grounding terminal, a power conversion unit, a direct-current bus capacitor unit, a filtering capacitor unit, a filtering inductor unit, and a compensation line. According to the invention, three groups of main winding inductors and three groups of auxiliary winding inductors form the filtering inductor unit, so that the power conversion unit can be coupled to three phase terminals of an external electrical device through the three groups of main winding inductors, and the three groups of auxiliary winding inductors can be matched with a compensation unit of a compensation capacitor to form the compensation line. Thus, engineering personnel can select an appropriate turns ratio of the main winding inductance to the auxiliary winding inductance so as to easily suppress common-mode noise at the resonance frequency of the power converter obviously and effectively.
Description
Technical field
The application relates to a kind of three-phase power converters, is espespecially connected to a kind of power conversion unit with suppression common mode noise function of phase three-wire three low-frequency ac power or load.
Background technology
In the systems such as AC-DC, the DC-AC of three-phase, UPS, wind energy and solar energy, usually need a three-phase power converters.Figure 1 shows that the topological structure of basic three-phase power converters, this three-phase power converters 1 ' mainly comprises: a power conversion unit 11 ', filter inductance group 12 ', filter capacitor group 13 ' and a source impedance stabilizing network 14 '; Wherein, power conversion unit 11 ' is three the filter inductance (L being coupled in filter inductance group 12 ' respectively as three the brachium pontis mid points (A ', B ' and C ') exchanging end
f1', L
f2' and L
f3'); Further, these three filter inductance (L
f1', L
f2' and L
f3') be coupled to again three filter capacitor Cx ' of this filter capacitor group 13 ' respectively; Wherein, these three filter capacitor Cx ' are Y-connection, and one end of these three filter capacitor Cx ' is three phase terminals (Ua ', Ub ' and Uc ') being coupled to external electrical network 2 ', and the other end is then connected with each other to form a neutral point N '.Further, can also by source impedance stabilizing network (Line ImpedanceStabilization Network, LISN) 14 ' be coupled between this electrical network 2 ' and this filter capacitor group 13 ', in order to carry out auxiliary equipment during Conducted Electromagnetic Interference test as this three-phase power converters 1 '.In addition, as shown in Figure 1, the output of power conversion unit 11 ' is by DC filter capacitor C
b0', C
b1' and C
b2' form three DC terminal O ', P ' and Q ' respectively, wherein DC terminal O ' is DC bus mid point O ', is DC filter capacitor C
b1' and C
b2' shared end.
Among described three-phase power converters 1 ', suppose C
0' for being connected with DC filter capacitor C
b0', C
b1' and C
b2' DC bus and earth terminal GND ' between distributed capacitance, then C
1A', C
1B' and C
1C' be respectively each brachium pontis mid point among power conversion unit 11 ' (A ', B ' and C ') distributed capacitance of GND ' over the ground.So, when power conversion unit 11 ' carries out jump in potential, distributed capacitance C
1A', C
1B' and C
1C' can displacement current be produced, and this displacement current can flow into earth terminal GND ' further, thus forms common mode noise (common mode current).Unceasingly with reference to the solution of the suppression common mode noise of the three-phase power converters shown in figure 2.The topological structure formula of the three-phase power converters shown in Fig. 2 is by being coupled between the filter capacitor group 13 ' of the electrical network 2 ' shown in Fig. 1 and three-phase power converters 1 ' by a passive common mode filters 15 '; Wherein, passive common mode filters 15 ' comprises multiple common mode inductance L
cM' a common mode inductance group 151 ' forming and three filter capacitor C by Y-connection each other
y' a filter capacitor group 152 ' being formed.
Although the solution shown in Fig. 2 can solve the common mode noise among the three-phase power converters 1 ' resulting from Fig. 1 really, due to common mode inductance L
cM' volume large, cost is high, cause this common mode inductance group 151 ' design with integrate on difficulty.As shown in the voltage spectrum figure of Fig. 3, wherein, the voltage spectrum figure that curve 1 is the three-phase power converters 1 ' shown in Fig. 1, and the voltage spectrum figure that curve 2 is the three-phase power converters shown in Fig. 2.By the voltage spectrum figure of Fig. 3, even if can find between electrical network 2 ' that passive common mode filters 15 ' is coupled to and the filter capacitor group 13 ' of three-phase power converters 1 ', at the resonance frequency f of power inverter
0place, still also exists very large noise, and display passive common mode filters 15 ' is not good for the noise rejection effect of this three-phase power converters 1 '.
The comprehensively understanding of the above-mentioned common mode noise solution for existing various three-phase power converters, can learn that existing various common mode noise solutions all have a little shortcoming with not enough; In view of this, the inventor of this case does one's utmost to be studied invention, and has has finally researched and developed the present invention.
Summary of the invention
In order to overcome defect of the prior art, main purpose of the present invention is that providing a kind of has the power conversion unit suppressing common mode noise function, it mainly assists winding inductance to be formed a filter inductance unit with three groups of main winding inductance and three groups, makes the major power converter unit of this power conversion unit inside can be coupled to three phase terminals of outside electric device by these three groups of main winding inductance; Simultaneously, these three groups are more utilized to assist winding inductance coordinating example if building-out capacitor compensating unit is to form one group of compensated line, make engineering staff by selecting suitable main winding inductance and the turn ratio of auxiliary winding inductance, and easily for the common mode noise at the resonance frequency place of power inverter, play the inhibition of significant effective.
Therefore, in order to reach object of the present invention, present inventor proposes a kind of power conversion unit with suppression common mode noise function, and it comprises:
One earth terminal;
One power conversion unit, have one first DC terminal, one second DC terminal, one first ac terminal, one second ac terminal, with one the 3rd ac terminal; Wherein, this first DC terminal and this second DC terminal are coupled to one first outside electric device;
One dc-link capacitance unit, is coupled between this first DC terminal and this second DC terminal;
One filter capacitor unit, comprise one first filter capacitor, one second filter capacitor and one the 3rd filter capacitor, wherein, described first filter capacitor, described second filter capacitor and described 3rd filter capacitor one end are separately coupled to a first-phase terminal of one second outside electric device, a second-phase terminal and a third phase terminal respectively, and described first filter capacitor, described second filter capacitor and the described 3rd filter capacitor other end are separately connected to each other to a common port; And
One filter inductance unit, comprise: one first main winding inductance, there is one first main winding low frequency end and one first main winding front end, wherein, described first main winding low frequency end is coupled to described first-phase terminal and described 3rd filter capacitor, and described first main winding front end is then coupled to described first ac terminal; One first auxiliary winding inductance, with this first main winding inductance coupling high, and have one first auxiliary winding low frequency end and one first auxiliary winding front end, wherein, the described first auxiliary winding low frequency end is coupled to this common port; One second main winding inductance, there is one second main winding low frequency end and one second main winding front end, wherein, described second main winding low frequency end is coupled to this second-phase terminal and this second filter capacitor, and described second main winding front end is then coupled to this second ac terminal; One second auxiliary winding inductance, with this second main winding inductance coupling high, has one second auxiliary winding low frequency end and one second auxiliary winding front end, and wherein, the described second auxiliary winding low frequency end is coupled to the described first auxiliary winding front end; One the 3rd main winding inductance, there is one the 3rd main winding low frequency end and one the 3rd main winding front end, wherein, described second main winding low frequency end couples this first filter capacitor of this third phase terminal, and described 3rd main winding front end is then coupled to the 3rd ac terminal; And one the 3rd assists winding inductance, with described 3rd main winding inductance coupling high, and there is one the 3rd auxiliary winding low frequency end and one the 3rd auxiliary winding front end, wherein, described 3rd auxiliary winding low frequency end is coupled to the described second auxiliary winding front end, and the described 3rd auxiliary winding front end is coupled to this earth terminal.
According to a specific embodiment with the power conversion unit suppressing common mode noise function of the present invention, more comprise a compensating unit, one end of described compensating unit is coupled in the 3rd auxiliary winding front end, and the other end is then coupled in this earth terminal.
According to a specific embodiment with the power conversion unit suppressing common mode noise function of the present invention, described compensating unit is selected from any one of following group: building-out capacitor, compensating inductance, compensating resistance, above-mentioned both tandem compound, above-mentioned three tandem compound.
According to a specific embodiment with the power conversion unit suppressing common mode noise function of the present invention, described compensating unit is composed in series by a compensating inductance and a building-out capacitor, and the sensibility reciprocal Lcomp of this compensating inductance meets following computing formula: Lcomp < 2 (M-3L '); Wherein, M is three main winding inductance of described filter inductance unit inside and the mutual induction amount of three auxiliary winding inductances, and L ' is the inductance value of three auxiliary winding inductances of this filter inductance unit inside.
According to a specific embodiment with the power conversion unit suppressing common mode noise function of the present invention, the sensibility reciprocal Lcomp of described compensating inductance meets following computing formula: L
comp=M-3L '.
According to a specific embodiment with the power conversion unit suppressing common mode noise function of the present invention, the turn ratio of the turn ratio of described first main winding inductance and the described first auxiliary winding inductance, described second main winding inductance and the described second auxiliary winding inductance and the turn ratio of described 3rd main winding inductance and the described 3rd auxiliary winding inductance, be all between 3:1.3 and 3:0.7.And, preferably, described first main winding inductance and described first assists the turn ratio of the turn ratio of winding inductance, described second main winding inductance and the described second auxiliary winding inductance and the turn ratio of described 3rd main winding inductance and the described 3rd auxiliary winding inductance to be all 3:1.
According to a specific embodiment with the power conversion unit suppressing common mode noise function of the present invention, described power conversion unit is one or two level power converter, three level power converter or other multi-level power converter.
According to a specific embodiment with the power conversion unit suppressing common mode noise function of the present invention, described first DC terminal and described second DC terminal are coupled to one first electric device, wherein, described first electric device is that electric capacity, AC-to DC rectification unit, direct current are to AC rectification unit and battery.
According to a specific embodiment with the power conversion unit suppressing common mode noise function of the present invention, described having suppresses the power conversion unit of common mode noise function also to comprise one second power conversion unit, is be coupled between described first DC terminal and described second DC terminal.
According to a specific embodiment with the power conversion unit suppressing common mode noise function of the present invention, described second power conversion unit is the rectification unit of an AC-to DC or flows to ac converter unit always.
According to a specific embodiment with the power conversion unit suppressing common mode noise function of the present invention, described first-phase terminal, described second-phase terminal and described third phase terminal are coupled to one second electric device, wherein, the second described electric device is electrical network or motor.
According to a specific embodiment with the power conversion unit suppressing common mode noise function of the present invention, described have suppress the power conversion unit of common mode noise function more to comprise an Electromagnetic interference filter, and described Electromagnetic interference filter is coupled in this filter capacitor unit and this first-phase terminal, between this second-phase terminal and this third phase terminal.
According to a specific embodiment with the power conversion unit suppressing common mode noise function of the present invention, described Electromagnetic interference filter is one group of differential mode filter, it comprises: one first EMI Filtering inductance, its one end is coupled in this first-phase terminal, and its other end is coupled in this first filter capacitor; One second EMI Filtering inductance, its one end is coupled in this second-phase terminal, and its other end is coupled in this second filter capacitor; One the 3rd EMI Filtering inductance, its one end is coupled in this third phase terminal, and its other end is coupled in the 3rd filter capacitor; One first EMI Filtering electric capacity, its one end is coupled in this first EMI Filtering inductance, and its other end is coupled in this second EMI Filtering inductance; One second EMI Filtering electric capacity, its one end is coupled in this second EMI Filtering inductance, and its other end is coupled in the 3rd EMI Filtering inductance; And one the 3rd EMI Filtering electric capacity, its one end is coupled in this first EMI Filtering inductance, and its other end is coupled in the 3rd EMI Filtering inductance.
According to a specific embodiment with the power conversion unit suppressing common mode noise function of the present invention, described Electromagnetic interference filter is one group of common-mode filter, it comprises: one first EMI Filtering inductance, its one end is coupled in this first-phase terminal, and its other end is coupled in this first filter capacitor; One second EMI Filtering inductance, its one end is coupled in this second-phase terminal, and its other end is coupled in this second filter capacitor; One the 3rd EMI Filtering inductance, its one end is coupled in this third phase terminal, and its other end is coupled in the 3rd filter capacitor; One first EMI Filtering electric capacity, its one end is coupled in the 3rd EMI Filtering inductance, and its other end is coupled in this earth terminal; One second EMI Filtering electric capacity, its one end is coupled in this second EMI Filtering inductance, and its other end is coupled in this earth terminal; And one the 3rd EMI Filtering electric capacity, its one end is coupled in this first EMI Filtering inductance, and its other end is coupled in this earth terminal.
According to a specific embodiment with the power conversion unit suppressing common mode noise function of the present invention, described power conversion unit is a phase three-wire three power conversion unit.
Compared to prior art, technology of the present invention has the following advantages:
1. the power conversion unit with suppression common mode noise function proposed by the invention, its main technical characteristic is the Topology Structure Design of filter inductance unit and compensated line; Wherein, assist winding inductance to be formed this filter inductance unit with three groups of main winding inductance and three groups, make power conversion unit can be coupled to three phase terminals of outside electric device by these three groups of main winding inductance; Simultaneously, these three groups are more utilized to assist winding inductance coordinating example if the compensating unit of building-out capacitor is to form compensated line, make engineering staff by selecting suitable main winding inductance and the turn ratio of auxiliary winding inductance, and the common mode noise at resonance frequency place for power inverter, to play obviously, effective inhibition.
2. hold above-mentioned 1st point, and, because these three groups are assisted winding inductance mainly in order to common mode current (common mode noise) is directed to earth terminal, therefore can go out these three groups with thinner wire-wound and assist winding inductance, such mode also effectively can save volume and the manufacturing cost of common-mode filter.
Accompanying drawing explanation
Describe configuration and embodiment in detail see following accompanying drawing, wherein refer to identical assembly with identical Reference numeral.
Fig. 1 is the topology diagram of basic three-phase power converters;
Fig. 2 is the solution figure of the suppression common mode noise of basic three-phase power converters;
Fig. 3 is voltage spectrum figure;
Fig. 4 is a kind of the first topology diagram with the power conversion unit suppressing common mode noise function of the present invention;
Fig. 5 is the second topology diagram with the power conversion unit suppressing common mode noise function of the present invention;
Fig. 6 is the topology diagram of power conversion unit;
The equivalent common mode noise illustraton of model that Fig. 7 is the topological structure shown in Fig. 5;
Fig. 8 is the third topology diagram that the present invention has the power conversion unit suppressing common mode noise function;
The equivalent common mode noise illustraton of model that Fig. 9 is the topological structure shown in Fig. 8;
Figure 10 a is a voltage spectrum figure;
Figure 10 b is another voltage spectrum figure;
Figure 11 is the 4th kind of topology diagram that the present invention has the power conversion unit suppressing common mode noise function;
Figure 12 is a kind of topology diagram of Electromagnetic interference filter;
Figure 13 is the topology diagram of another kind of Electromagnetic interference filter;
Figure 14 is that this has a kind of applied topology structure chart of the power conversion unit suppressing common mode noise function;
Figure 15 is that this has the another kind of applied topology structure chart of the power conversion unit suppressing common mode noise function;
Figure 16 is that this has another the applied topology structure chart of the power conversion unit suppressing common mode noise function;
Figure 17 is that this has another the applied topology structure chart of the power conversion unit suppressing common mode noise function.
Wherein, description of reference numerals is as follows:
1 '-three-phase power converters;
11 '-power conversion unit; 12 '-filter inductance group;
14 '-source impedance stabilizing network, 13 '-filter capacitor group;
A '-brachium pontis mid point B '-brachium pontis mid point;
C '-brachium pontis mid point L
f1'-filter inductance;
L
f2'-filter inductance; L
f3'-filter inductance;
Cx '-filter capacitor 2 '-electrical network;
Ua '-first-phase terminal; Uc '-third phase terminal;
N '-neutral point; Ub '-second-phase terminal;
C
b0'-DC filter capacitor; C
b1'-DC filter capacitor;
C
b2'-DC filter capacitor; O '-DC terminal;
P '-DC terminal; Q '-DC terminal;
C
1A'-distributed capacitance; GND '-earth terminal;
C
1B'-distributed capacitance; C
1C'-distributed capacitance;
15 '-passive common mode filters; LCM '-common mode inductance;
151 '-common mode inductance group; 152 '-filter capacitor group;
C
y'-filter capacitor; C
0'-distributed capacitance;
1-has the power conversion unit suppressing common mode noise function;
11-power conversion unit; 12-filter capacitor unit;
14-compensated line; 13-filter inductance unit;
P-first DC terminal; Q-second DC terminal;
A-first ac terminal; B-second ac terminal;
C-the 3rd ac terminal; CB0-dc-link capacitance unit;
CB1-first bus capacitor; CB2-second bus capacitor;
O-DC bus mid point; Cx1-first filter capacitor;
Cx2-second filter capacitor; CX3-the 3rd filter capacitor;
2-electric device; Ua-first-phase terminal;
Ub-second-phase terminal; Uc-third phase terminal;
N-common port 15-source impedance stabilizing network;
LA-first main winding inductance; The auxiliary winding inductance of LA '-the first;
LB-second main winding inductance; The auxiliary winding inductance of LB '-the second;
LC-the 3rd main winding inductance; LC '-three assists winding inductance;
A-first ac terminal; 141-compensating unit;
GND-earth terminal; Ccomp-building-out capacitor;
Lcomp-compensating inductance;
Z
lISNthe equiva lent impedance of-source impedance stabilizing network;
M-mutual induction amount; L-inductance value;
L '-total inductance; u
aO– voltage;
U
bO– voltage; u
cO– voltage;
Ucomp – bucking voltage; Ccm – equivalence common mode capacitance;
C1a-distributed capacitance; C1b-distributed capacitance;
C1c-distributed capacitance; Co-distributed capacitance;
17-Electromagnetic interference filter; LDM1-first differential mode filter inductance;
LDM2-second differential mode filter inductance; LDM3-the 3rd differential mode filter inductance;
Cxx1-first differential mode filter capacitor; Cxx2-second differential mode filter capacitor;
Cxx3-the 3rd differential mode filter capacitor; LCM1-first common mode filtering inductance;
LCM2-second common mode filtering inductance; LCM3-the 3rd common mode filtering inductance;
CY1-first common mode filtering electric capacity; CY2-second common mode filtering electric capacity;
CY3-the 3rd common mode filtering electric capacity; 11a-second power conversion unit;
2a-electrical network; 2b-motor;
2d-battery; 2c-nonlinear load.
Embodiment
A kind of multiple execution modes with the power conversion unit suppressing common mode noise function of the present invention are specifically described below with reference to accompanying drawing.As clearly stated, the details of multiple embodiment will be explained in the following description.But should be appreciated that, the details of these embodiments should not be used to limit the application.
Please also refer to Fig. 4 and Fig. 5, be respectively a kind of the first and the second topological structure with the power conversion unit suppressing common mode noise function of the present invention.As shown in Figure 4, the topological structure with the power conversion unit 1 (hereinafter referred to as power conversion unit 1) of suppression common mode noise function of the present invention mainly comprises: an earth terminal GND, power conversion unit 11, dc-link capacitance unit CB0, filter capacitor unit 12, filter inductance unit 13 and a compensated line 14.Power conversion unit 11 is two level three-phase power converters as shown in Figure 5, and have one first DC terminal P, one second DC terminal Q, one first ac terminal A, one second ac terminal B, with one the 3rd ac terminal C; Wherein, because the first DC terminal P and the second DC terminal Q is not yet connected to outside electric device, be therefore coupled between this first DC terminal P and this second DC terminal Q with a dc-link capacitance unit CB0.In this, what must illustrate is, among any possible engineer applied, power conversion unit 11 is coupled to an electric capacity, a direct current to exchanging (DC-AC) rectification unit or a battery by its first DC terminal P with the second DC terminal Q.
Once again with reference to figure 5, and simultaneously with reference to the topological structure of the power conversion unit 11 shown in figure 6, power conversion unit 11 is a three level power conversion unit.Among the application of reality, power conversion unit 11 also can be level three phase power converter unit more than or other multi-level power converter; Wherein, dc-link capacitance unit CB0 is divided into one first bus capacitor CB1 and one second bus capacitor CB2.As shown in the figure, the first bus capacitor CB1 is coupled between this first DC terminal P and DC bus mid point O, and the second bus capacitor CB2 is then coupled between this second DC terminal Q and DC bus mid point O.
Power conversion unit 1 of the present invention is described unceasingly, and wherein, filter capacitor unit 12 comprises one first filter capacitor Cx1, one second filter capacitor Cx2 and the 3rd filter capacitor Cx3.As shown in Figure 5, one end of this first filter capacitor Cx1, this second filter capacitor Cx2 and the 3rd filter capacitor Cx3 is coupled to an outside electric device 2; Special instruction, this electric device 2 is the electric device 2 of a tool three-phase terminal, such as electrical network, motor and nonlinear load; Therefore, this first filter capacitor Cx1, this second filter capacitor Cx2 and the 3rd filter capacitor Cx3 one end are separately a first-phase terminal Ua, the second-phase terminal Ub and the third phase terminal Uc that are coupled to this electric device 2 respectively; Further, the first filter capacitor Cx1, the second filter capacitor Cx2 and the 3rd filter capacitor Cx3 other end are separately connected to each other to a common port N.In addition, source impedance stabilizing network (Line ImpedanceStabilization Network, LISN) 15 is be coupled between this electric device 2 and this filter capacitor unit 12, and the power conversion unit in order to have suppression common mode noise function as this carries out auxiliary equipment during Conducted Electromagnetic Interference test.
As shown in Figure 5, filter inductance unit 13 comprises: one first main winding inductance L A, one first auxiliary winding inductance LA ', one second main winding inductance L B, one second assist winding inductance LB ', one the 3rd main winding inductance L C, assist winding inductance LC ' with one the 3rd; Wherein, the first main winding inductance L A has a low frequency end of the first-phase terminal Ua being coupled to this electric device 2, and is coupled to the front end of the first ac terminal A of this power conversion unit 11.Corresponding to the first main winding inductance L A, first auxiliary winding inductance LA ' also has a low frequency end and a front end, with the low frequency end of main winding each other Same Name of Ends be defined as the low-frequency range of auxiliary winding, with the front end of main winding each other Same Name of Ends be defined as the high band of auxiliary winding, as shown in the figure, one end of band point is the Same Name of Ends of auxiliary winding inductance and main winding inductance, that is the first auxiliary winding inductance LA ' is with some end to be its low frequency end, the other end is then front end, and the described first auxiliary winding low frequency end is coupled to this common port N.Further, described second main winding inductance L B has a low frequency end of the second-phase terminal Ub being coupled to electric device 2, and is coupled to the front end of the second ac terminal B of this power conversion unit 11; Same, second auxiliary winding inductance LB ' also has a low frequency end and a front end, and as shown in the figure, one end of band point is the Same Name of Ends of auxiliary winding inductance and main winding inductance, therefore the second auxiliary winding inductance LB ' is with some end to be its low frequency end, and the other end is then front end.Moreover the 3rd main winding inductance L C has a low frequency end and a front end equally, wherein, the low frequency end of the 3rd main winding inductance L C is the third phase terminal Uc being coupled to electric device 2, and its front end is then coupled to the 3rd ac terminal C.3rd auxiliary winding inductance LC ' also has a low frequency end and a front end, and as shown in the figure, one end of band point is the Same Name of Ends of auxiliary winding inductance and main winding inductance, and therefore the 3rd auxiliary winding inductance LC ' is with some end to be its low frequency end, and the other end is then front end.
In the present invention, compensated line 14 is mainly connected in series is formed by this first auxiliary winding inductance LA ', this second auxiliary winding inductance LB ', a 3rd auxiliary winding inductance LC ' and compensating unit 141; Wherein, the principle head and the tail in series that three auxiliary windings are connected with front end according to low frequency end compensate branch road; One end of the series arm of composition is the front end compensating branch road, and the other end is then for compensating the low frequency end of branch road.As shown in Figure 5, the low frequency end compensating branch road is connected to the common port N of filter capacitor unit 12, and the front end compensating branch road is coupled to earth terminal GND.The present invention is not particularly limited the form of compensating unit 141, therefore, compensating unit 141 can be a building-out capacitor Ccomp, a compensating inductance Lcomp, a compensating resistance, above-mentioned both tandem compound or the tandem compound of above-mentioned three.Please also refer to Fig. 5 and Fig. 7, the equivalent common mode noise model that Fig. 7 is the topological structure shown in Fig. 5.As shown in Figure 5, compensating unit 141 to be connected in series with a building-out capacitor Ccomp by a compensating inductance Lcomp and to form; Therefore, the topological structure of Fig. 5 can be simplified as the equivalent common mode noise model of Fig. 7.Among the equivalent common mode noise model of Fig. 7, Z
lISNfor the equivalent resistance (impedance) of the source impedance stabilizing network 15 shown in Fig. 5, N are this common port, M is the mutual induction amount of three main winding inductance of filter inductance unit 13 inside and three auxiliary winding inductances, L is this filter inductance unit 13 inside three main winding inductance values and L ' three the auxiliary winding electric sensibility reciprocals that are this filter inductance unit 13 inside.
Unceasingly simultaneously with reference to figure 5 and Fig. 7.In Figure 5, u
aO, u
bOand u
cObe expressed as the first ac terminal A, the second ac terminal B and the voltage between the 3rd ac terminal C and DC bus mid point O.Ucomp is expressed as the bucking voltage formed by three of filter inductance unit 13 auxiliary winding inductances (LA1 ', LA2 ' and LA3 '); Further, C1a, C1b and C1c in Fig. 5 are respectively three ac terminals (A, B and C) distributed capacitance over the ground, and Co is then respectively DC bus mid point O distributed capacitance over the ground.In the topological structure of Fig. 5, leaping voltage (u
aO, u
bOand u
cO) displacement current can be generated on those distributed capacitance (C1a, C1b and C1c), displacement current flows into ground and namely forms common mode current (that is, common-mode noise).Separately, the Ccm corresponding to Fig. 5, Fig. 7 is equivalent common mode capacitance, is the total capacitance for these four distributed capacitance (C1a, C1b, C1c and C0).
As mentioned above, according to the equivalent model of Fig. 7, can find, if the sensibility reciprocal Lcomp=M-3L ' of described compensating inductance, then can make 3L '-M+Lcomp=0; Thus, compensated line 14 can be equivalent to a building-out capacitor Ccomp, make this building-out capacitor Ccomp as a Y capacitance (namely, CY) use, simultaneously mutual inductance M can by etc. school be a common mode inductance (namely, LCM) use, and Y capacitance and common mode inductance just constitute an equivalent common-mode filter.In the application of reality, as long as Lcomp < 2 (M-3L ') just can play the positive effect of equivalent common-mode filter.
In addition, the third topological structure with the power conversion unit suppressing common mode noise function of the present invention is illustrated in figure 8.Compared to the topological structure of Fig. 5, the topological structure of Fig. 8 is using a building-out capacitor Ccomp as this compensating unit 141.Further, the topological structure of the power conversion unit of Fig. 8 can by the equivalent common mode noise model be equivalent to as shown in Figure 9.In the topological structure shown in Fig. 8, the main winding inductance among filter inductance unit 13 and the turn ratio n of auxiliary winding inductance are 3:1; So, then make the total inductance L=9L ' of three main winding inductance of filter inductance unit 13 inside, and make the mutual inductance M=3L ' of three main winding inductance and three auxiliary winding inductances.Due to Lcomp=M-3L ', therefore by the known Lcomp=0 of calculating.That is, in the topological structure of the power conversion unit 1 of Fig. 8, be do not need using compensation inductance.
Hold above-mentioned explanation, due to L/3-M=0, therefore, as shown in the curve 3 of Fig. 3, such design for the common mode noise at the resonance frequency f0 place of power inverter, can serve very large inhibition.In this, must remark additionally, in the engineer applied of reality, because the main winding inductance of filter inductance unit 13 inside can not reach theoretical value 1 with being coupled of auxiliary winding inductance; Based on such reason, design is of the present invention there is the power conversion unit 1 suppressing common mode noise function in, can allow the turn ratio n of main winding inductance and auxiliary winding inductance between 3:1.3 and 3:0.7, and preferably turn ratio n is 3:1.
Effect of the suppression common mode noise of the power conversion unit 1 shown in Fig. 8, this topological structure can be implemented with simulation software, and measuring the magnitude of voltage measuring its source impedance stabilizing network (LISN) 15 at different frequencies, the result of emulation is as shown in Figure 10 a; Implement the topological structure of the existing power conversion unit shown in Fig. 1 with simulation software, and measure the magnitude of voltage measuring its source impedance stabilizing network (LISN) at different frequencies, the result of measurement as shown in fig. lob.Comparison diagram 10a and Figure 10 b, obviously can find upper at frequency range 30kHz of the power conversion unit 1 shown in Fig. 8, have good common mode noise inhibition, and also reduce the resonance occurring in more than frequency range 260kHz.
Except the topological structure with the power conversion unit suppressing common mode noise function of the present invention shown in Fig. 3, Fig. 5, Fig. 8, in the engineer applied of reality, of the present invention have the topological structure suppressing the power conversion unit of common mode noise function to have more other expansion.Please refer to Figure 11, is the 4th kind of topological structure with the power conversion unit suppressing common mode noise function of the present invention; Wherein, the topological structure shown in Figure 11 completes by between the filter capacitor unit 12 Electromagnetic interference filter (EMI filter) 17 be coupled among the power conversion unit 1 shown in Fig. 4 and electric device 2.Further, this Electromagnetic interference filter 17 can be differential mode filter as shown in figure 12 or common-mode filter as shown in fig. 13 that.
Hold above-mentioned explanation, if using differential mode filter as this Electromagnetic interference filter 17, then it comprises: one first differential mode filter inductance LDM1, and its one end is coupled in this first-phase terminal Ua, and its other end is coupled in this first filter capacitor Cx1; One second differential mode filter inductance LDM2, its one end is coupled in this second-phase terminal Ub, and its other end is coupled in this second filter capacitor Cx2; One the 3rd differential mode filter inductance LDM3, its one end is coupled in this third phase terminal Uc, and its other end is coupled in the 3rd filter capacitor Cx3; One first differential mode filter capacitor Cxx1, its one end is coupled in this first differential mode filter inductance LDM1, and its other end is coupled in this second differential mode filter inductance LDM2; One second differential mode filter capacitor Cxx2, its one end is coupled in this second differential mode filter inductance LDM2, and its other end is coupled in the 3rd differential mode filter inductance LDM3; And one the 3rd differential mode filter capacitor Cxx3, its one end is coupled in this first differential mode filter inductance LDM1, and its other end is coupled in the 3rd differential mode filter inductance LDM3.
Further, if using common-mode filter as this Electromagnetic interference filter 17, then it comprises: one first common mode filtering inductance L CM1, and its one end is coupled in this first-phase terminal Ua, and its other end is coupled in this first filter capacitor Cx1; One second common mode filtering inductance L CM2, its one end is coupled in this second-phase terminal Ub, and its other end is coupled in this second filter capacitor Cx2; One the 3rd common mode filtering inductance L CM3, its one end is coupled in this third phase terminal Uc, and its other end is coupled in the 3rd filter capacitor Cx3; One first common mode filtering electric capacity CY1, its one end is coupled in the 3rd common mode filtering inductance L CM3, and its other end is coupled in this earth terminal GND; One second common mode filtering electric capacity CY2, its one end is coupled in this second common mode filtering inductance L CM2, and its other end is coupled in this earth terminal GND; And one the 3rd common mode filtering electric capacity CY3, its one end is coupled in this first common mode filtering inductance L CM1, and its other end is coupled in this earth terminal GND.
So, via above-mentioned complete explanation, of the present invention have suppress the topological structure of the various practical applications of the power conversion unit of common mode noise function and correlation technique feature thereof all clearly to be introduced.Then, the application surface of power conversion unit of the present invention will be gone on to say below.The topological structure of power conversion unit as shown in figure 14, power conversion unit 11 couples one second power conversion unit 11a by its first DC terminal P and the second DC terminal Q, second power conversion unit 11a is coupled to a motor 2b, three ac terminals (A, B and C) of power conversion unit 1 are coupled to an external electrical network 2a, wherein the second power conversion unit 11a can be direct current to the interchange inversion unit of (DC-AC) or the rectification unit of AC-to DC, and this power conversion unit can be applicable to a motor driven systems or wind generator system.Refer again to the topological structure of the power conversion unit 1 shown in Figure 15, wherein, power conversion unit 11 couples one second power conversion unit 11a by its first DC terminal P and the second DC terminal Q, second power conversion unit 11a is coupled to external electrical network 2a, three ac terminal (A of power conversion unit 1, B and C) be coupled to motor 2b, wherein the second power conversion unit 11a can be direct current to the interchange inversion unit of (DC-AC) or the rectification unit of AC-to DC, this power conversion unit can be applicable to the motor side of a motor driven systems or wind generator system.
Please unceasingly with reference to the topological structure of the power conversion unit 1 shown in Figure 16, wherein, first DC terminal P and the second DC terminal Q of power conversion unit 11 outside electric device of getting along well is connected, and is therefore coupled between this first DC terminal P and this second DC terminal Q with a dc-link capacitance unit CB0; Relatively, three ac terminals (A, B and C) of power conversion unit 11 are then coupled to an an electrical network 2a and nonlinear load 2c simultaneously.Finally, please refer to the topological structure of the power conversion unit 1 shown in Figure 17, wherein, power conversion unit 11 is coupled to a battery 2d by its first DC terminal P and the second DC terminal Q; Further, three ac terminals (A, B and C) of power conversion unit 11 are then coupled to an electrical network 2a.
So, above-mentioned complete and all topological structures and the application thereof with the power conversion unit suppressing common mode noise function of the present invention are clearly described, and, via above-mentioned, can learn that the present invention has following advantage:
1. the power conversion unit with suppression common mode noise function proposed by the invention, main technical characteristic is the Topology Structure Design of filter inductance unit 13 and compensated line 14; Wherein, assist winding inductance to be formed this filter inductance unit with three groups of main winding inductance and three groups, make power conversion unit 11 can be coupled to three phase terminals of outside electric device by these three groups of main winding inductance; Simultaneously, these three groups are more utilized to assist winding inductance coordinating example if the compensating unit 141 of building-out capacitor Ccomp is to form compensated line 14, make engineering staff by selecting suitable main winding inductance and the turn ratio of auxiliary winding inductance, and the common mode noise at resonance frequency place for power inverter, to play obviously, effective inhibition.
2. hold above-mentioned 1st point, and, because these three groups are assisted winding inductance mainly in order to common mode current (common mode noise) is directed to earth terminal GND, therefore can go out these three groups with thinner wire-wound and assist winding inductance, such mode also effectively can save volume and the manufacturing cost of common-mode filter.
It will be apparent to one skilled in the art that and can make various changes the application under the prerequisite of spirit and scope not deviating from the application and revise.Therefore, the application's intention contains the various modifications and variations made the application, as long as they drop in the protection range of claims and equivalent thereof.
Claims (18)
1. there is the power conversion unit suppressing common mode noise function, it is characterized in that, comprising:
One earth terminal;
One power conversion unit, have one first DC terminal, one second DC terminal, one first ac terminal, one second ac terminal, with one the 3rd ac terminal;
One dc-link capacitance unit, is coupled between described first DC terminal and described second DC terminal;
One filter capacitor unit, comprise one first filter capacitor, one second filter capacitor and one the 3rd filter capacitor, wherein, described first filter capacitor, described second filter capacitor and described 3rd filter capacitor one end are separately coupled to a first-phase terminal, a second-phase terminal and a third phase terminal respectively, and described first filter capacitor, described second filter capacitor and the described 3rd filter capacitor other end are separately connected to each other to a common port; And
One filter inductance unit, described filter inductance unit comprises:
One first main winding inductance, there is one first main winding low frequency end and one first main winding front end, wherein, described first main winding low frequency end is coupled to described first-phase terminal and described 3rd filter capacitor, and described first main winding front end is then coupled to described first ac terminal;
One first auxiliary winding inductance, with this first main winding inductance coupling high, and have one first auxiliary winding low frequency end and one first auxiliary winding front end, wherein, the described first auxiliary winding low frequency end is coupled to this common port;
One second main winding inductance, there is one second main winding low frequency end and one second main winding front end, wherein, described second main winding low frequency end is coupled to this second-phase terminal and this second filter capacitor, and described second main winding front end is then coupled to this second ac terminal;
One second auxiliary winding inductance, with this second main winding inductance coupling high, has one second auxiliary winding low frequency end and one second auxiliary winding front end, and wherein, the described second auxiliary winding low frequency end is coupled to the described first auxiliary winding front end;
One the 3rd main winding inductance, there is one the 3rd main winding low frequency end and one the 3rd main winding front end, wherein, described 3rd main winding low frequency end couples this third phase terminal and this first filter capacitor, and described 3rd main winding front end is then coupled to the 3rd ac terminal; And
One the 3rd auxiliary winding inductance, with described 3rd main winding inductance coupling high, and there is one the 3rd auxiliary winding low frequency end and one the 3rd auxiliary winding front end, wherein, described 3rd auxiliary winding low frequency end is coupled to the described second auxiliary winding front end, and the described 3rd auxiliary winding front end is coupled to this earth terminal.
2. according to claim 1 have the power conversion unit suppressing common mode noise function, it is characterized in that, also comprise: a compensating unit, one end of described compensating unit is coupled in the described 3rd auxiliary winding front end, and the other end of described compensating unit is coupled in this earth terminal.
3. according to claim 2 have the power conversion unit suppressing common mode noise function, it is characterized in that, described compensating unit be building-out capacitor, compensating inductance, compensating resistance, above-mentioned both tandem compound, above-mentioned three tandem compound.
4. according to claim 2 have the power conversion unit suppressing common mode noise function, it is characterized in that, described compensating unit is composed in series by a compensating inductance and a building-out capacitor, and the sensibility reciprocal Lcomp of described compensating inductance meets following computing formula: Lcomp < 2 (M-3L '); Wherein, M is three main winding inductance of described filter inductance unit inside and the mutual induction amount of three auxiliary winding inductances, and L ' is the inductance value of three auxiliary winding inductances of this filter inductance unit inside.
5. according to claim 4 have the power conversion unit suppressing common mode noise function, and it is characterized in that, the sensibility reciprocal Lcomp of described compensating inductance meets following computing formula: L
comp=M-3L '.
6. according to claim 1 have the power conversion unit suppressing common mode noise function, it is characterized in that, the turn ratio of the turn ratio of described first main winding inductance and the described first auxiliary winding inductance, described second main winding inductance and the described second auxiliary winding inductance and the turn ratio of described 3rd main winding inductance and the described 3rd auxiliary winding inductance, be all between 3:1.3 and 3:0.7.
7. according to claim 6 have the power conversion unit suppressing common mode noise function, it is characterized in that, the turn ratio of the turn ratio of described first main winding inductance and the described first auxiliary winding inductance, described second main winding inductance and the described second auxiliary winding inductance and the turn ratio of described 3rd main winding inductance and the described 3rd auxiliary winding inductance are all 3:1.
8. according to claim 1 have the power conversion unit suppressing common mode noise function, and it is characterized in that, described power conversion unit is one or two level power converter, three level power converter or other multi-level power converter.
9. according to claim 1 have the power conversion unit suppressing common mode noise function, and it is characterized in that, described first DC terminal and described second DC terminal are coupled to one first electric device.
10. according to claim 9 have the power conversion unit suppressing common mode noise function, and it is characterized in that, described first electric device is electrical network, motor or energy storage units.
11. power conversion units with suppression common mode noise function according to claim 10, it is characterized in that, also comprising one second power conversion unit, is be coupled between described first electric device and described first DC terminal and described second DC terminal.
12. power conversion units with suppression common mode noise function according to claim 11, it is characterized in that, described second power conversion unit is the rectification unit of an AC-to DC or flows to ac converter unit always.
13. power conversion units with suppression common mode noise function according to claim 1, it is characterized in that, described first-phase terminal, described second-phase terminal and described third phase terminal are coupled to one second electric device.
14. power conversion units with suppression common mode noise function according to claim 13, it is characterized in that, described second electric device is electrical network or motor.
15. power conversion units with suppression common mode noise function according to claim 13, it is characterized in that, more comprising an Electromagnetic interference filter, is be coupled in this filter capacitor unit and this first-phase terminal, between this second-phase terminal and this third phase terminal.
16. power conversion units with suppression common mode noise function according to claim 15, it is characterized in that, described Electromagnetic interference filter comprises:
One first EMI Filtering inductance, its one end is coupled in this first-phase terminal, and its other end is coupled in described first filter capacitor;
One second EMI Filtering inductance, its one end is coupled in this second-phase terminal, and its other end is coupled in described second filter capacitor;
One the 3rd EMI Filtering inductance, its one end is coupled in described third phase terminal, and its other end is coupled in described 3rd filter capacitor;
One first EMI Filtering electric capacity, its one end is coupled in described first EMI Filtering inductance, and its other end is coupled in described second EMI Filtering inductance;
One second EMI Filtering electric capacity, its one end is coupled in described second EMI Filtering inductance, and its other end is coupled in described 3rd EMI Filtering inductance; And
One the 3rd EMI Filtering electric capacity, its one end is coupled in described first EMI Filtering inductance, and its other end is coupled in described 3rd EMI Filtering inductance.
17. power conversion units with suppression common mode noise function according to claim 15, it is characterized in that, described Electromagnetic interference filter comprises:
One first EMI Filtering inductance, its one end is coupled in described first-phase terminal, and its other end is coupled in described first filter capacitor;
One second EMI Filtering inductance, its one end is coupled in described second-phase terminal, and its other end is coupled in described second filter capacitor;
One the 3rd EMI Filtering inductance, its one end is coupled in described third phase terminal, and its other end is coupled in described 3rd filter capacitor;
One first EMI Filtering electric capacity, its one end is coupled in described 3rd EMI Filtering inductance, and its other end is coupled in this earth terminal;
One second EMI Filtering electric capacity, its one end is coupled in described second EMI Filtering inductance, and its other end is coupled in this earth terminal; And
One the 3rd EMI Filtering electric capacity, its one end is coupled in described first EMI Filtering inductance, and its other end is coupled in this earth terminal.
18. power conversion units with suppression common mode noise function according to claim 1, it is characterized in that, described power conversion unit is a phase three-wire three power conversion unit.
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| CN201410020818.XA CN104795986B (en) | 2014-01-16 | 2014-01-16 | Power conversion device with common-mode noise suppression function |
| TW103120628A TWI500246B (en) | 2014-01-16 | 2014-06-13 | Power-converting device having common mode noise-suppressing function |
| US14/322,417 US9312753B2 (en) | 2013-07-02 | 2014-07-02 | Power converter with low common mode noise |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110571854A (en) * | 2019-09-06 | 2019-12-13 | 深圳市禾望电气股份有限公司 | Wind power generation system |
| CN111181413A (en) * | 2018-11-13 | 2020-05-19 | 罗克韦尔自动化技术公司 | Power conversion system and filter for the same |
| CN113824121A (en) * | 2021-11-23 | 2021-12-21 | 青岛鼎信通讯股份有限公司 | Topology applied to flexible direct-current comprehensive voltage regulating device for suppressing common-mode interference |
| US11509239B2 (en) | 2020-05-26 | 2022-11-22 | Delta Electronics (Shanghai) Co., Ltd | Conversion device having reduced size and cost |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI729333B (en) * | 2018-12-13 | 2021-06-01 | 台達電子工業股份有限公司 | Power converter with common dc power source and power supply apparatus having the same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6208098B1 (en) * | 1998-03-02 | 2001-03-27 | Yaskawa Electric America, Inc. | Variable frequency drive noise attenuation circuit |
| JP2005033895A (en) * | 2003-07-10 | 2005-02-03 | Toshiba Corp | Power converter |
| JP2009148078A (en) * | 2007-12-14 | 2009-07-02 | Toshiba Corp | Noise filter |
| JP2011147251A (en) * | 2010-01-14 | 2011-07-28 | Mitsubishi Electric Corp | Power converter |
| CN102971946A (en) * | 2010-07-06 | 2013-03-13 | 三菱电机株式会社 | Inverter |
| CN103222171A (en) * | 2010-11-24 | 2013-07-24 | 三菱电机株式会社 | Motor drive circuit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6867575B2 (en) * | 2002-12-06 | 2005-03-15 | Delta Electronics, Inc. | Switching mode power supply incorporating power line filter |
| JP2006211744A (en) * | 2005-01-25 | 2006-08-10 | Sony Corp | Switching power supply circuit |
| TWM413276U (en) * | 2011-03-21 | 2011-10-01 | Gao Yi Da Technology Co Ltd | Low common-mode noise power rectifier circuit |
-
2014
- 2014-01-16 CN CN201410020818.XA patent/CN104795986B/en active Active
- 2014-06-13 TW TW103120628A patent/TWI500246B/en active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6208098B1 (en) * | 1998-03-02 | 2001-03-27 | Yaskawa Electric America, Inc. | Variable frequency drive noise attenuation circuit |
| JP2005033895A (en) * | 2003-07-10 | 2005-02-03 | Toshiba Corp | Power converter |
| JP2009148078A (en) * | 2007-12-14 | 2009-07-02 | Toshiba Corp | Noise filter |
| JP2011147251A (en) * | 2010-01-14 | 2011-07-28 | Mitsubishi Electric Corp | Power converter |
| CN102971946A (en) * | 2010-07-06 | 2013-03-13 | 三菱电机株式会社 | Inverter |
| CN103222171A (en) * | 2010-11-24 | 2013-07-24 | 三菱电机株式会社 | Motor drive circuit |
Non-Patent Citations (3)
| Title |
|---|
| D. COCHRANE等: "Passive cancellation of common-mode noise in power electronic circuits", 《IEEE TRANSACTIONS ON POWER ELECTRONICS》 * |
| MARTIN SCHMIDT等: "Interaction between passive common mode noise cancellation and conservative passive filtering", 《2012 ASIA-PACIFIC SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY》 * |
| 张兴等: "非隔离型三相三电平光伏逆变器的共模电流抑制", 《中国电机工程学报》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111181413A (en) * | 2018-11-13 | 2020-05-19 | 罗克韦尔自动化技术公司 | Power conversion system and filter for the same |
| CN111181413B (en) * | 2018-11-13 | 2023-11-24 | 罗克韦尔自动化技术公司 | Power conversion system and filter for the same |
| CN110571854A (en) * | 2019-09-06 | 2019-12-13 | 深圳市禾望电气股份有限公司 | Wind power generation system |
| CN110571854B (en) * | 2019-09-06 | 2023-10-20 | 深圳市禾望电气股份有限公司 | Wind power generation system |
| US11509239B2 (en) | 2020-05-26 | 2022-11-22 | Delta Electronics (Shanghai) Co., Ltd | Conversion device having reduced size and cost |
| CN113824121A (en) * | 2021-11-23 | 2021-12-21 | 青岛鼎信通讯股份有限公司 | Topology applied to flexible direct-current comprehensive voltage regulating device for suppressing common-mode interference |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI500246B (en) | 2015-09-11 |
| TW201530992A (en) | 2015-08-01 |
| CN104795986B (en) | 2017-05-17 |
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