CN102457191A - Non-isolation type uninterruptible power supply device and control method thereof - Google Patents
Non-isolation type uninterruptible power supply device and control method thereof Download PDFInfo
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- CN102457191A CN102457191A CN2010105214653A CN201010521465A CN102457191A CN 102457191 A CN102457191 A CN 102457191A CN 2010105214653 A CN2010105214653 A CN 2010105214653A CN 201010521465 A CN201010521465 A CN 201010521465A CN 102457191 A CN102457191 A CN 102457191A
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Abstract
The invention relates to a non-isolation type uninterruptible power supply device and a control method thereof. Only one DC (direct current) voltage bus is used; the direct connection of an output neutral line and an input neutral line is maintained; and when the duration of a phase difference between an output voltage and an input voltage is too long, high-efficient alternating current power supply constant voltage output can be still realized. According to the invention, when potentials of an alternating current input voltage and an alternating current output voltage are located at different positive and negative potential zones, a system is operated in a pause mode, so that the problem of occurrence of abnormal loop current is avoided; and when the potentials of the alternating current input voltage and the alternating current output voltage are located at the same positive and negative potential zone, the system is operated in a boost mode, so that high-efficient power output is obtained.
Description
Technical field
The present invention relates to non-isolation type uninterrupted power supply (UPS; Uninterrupted Power Supply) device and control method thereof; Relate more particularly to solve when importing AC power supplies and exporting the AC power supplies phase place not simultaneously, only have the problem of the non-isolation type UPS device of a dc voltage bus.
Background technology
Usually; In traditional uninterrupted power supply(ups) (UPS) system; Whether adopt isolating transformer (Isolated Transformer) according to supply unit, can UPS be divided into two kinds of isolated form and non-isolation types because with the civil power of input when frequency converter (Inverter) converts power supply and supply load to; Regulation requires the neutral line (Neutral) of frequency converter output must keep the characteristic of input city electrical neutral axis, the danger of promptly can avoid getting shocked (Electric Stock).That is to say that the voltage of the relative ground wire of the neutral line must be lower than the dangerous voltage of regulation.In order to meet the requirement of said regulation, will import the neutral line of civil power and the neutral line of frequency converter output usually and directly link together.For early stage single dc voltage bus (DC Voltage Bus) framework, unless the isolation of frequency converter output process isolating transformer, the neutral line of bypass can't directly link together with the neutral line of frequency converter output.But aforementioned low frequency isolation transformer is not only bulky but also cost an arm and a leg, this in addition for system's conversion efficiency of supply unit very big restriction is arranged.Therefore, produced the non-isolation type UPS of two direct current transducers (Double Conversion) framework.
Through referring to figs. 1 to the non-isolation type ups system shown in 3 because the neutral line of input power supply is connected to the output stage as the neutral line of inverter, adopt two dc voltage bus configuration and with half-bridge as output stage.When output stage and unbalanced load or imaginary loading are coupled, the voltage through two dc voltage electric capacity will become unbalanced, and therefore many additional capacitors are used to solve such problem equally.In addition, the Tai Gao or too low that possibly become of the voltage on any of two voltage capacitors, this causes whole system to get into the error protection pattern.
In order to overcome the above-mentioned deficiency of two dc voltage bus configuration, to have developed and be accompanied by the single dc voltage bus ups system of full-bridge inverter as output stage, no matter wherein single dc voltage bus can be positive half cycle or negative half period to the load power supply.This single dc voltage bus configuration not only solves the problem of two dc voltage bus configuration, and can make outputting inductance loss unshakable in one's determination have only in the past half, and can use electric capacity and the semiconductor diverter switch than low withstand voltage.In addition, the electric capacity quantity in single dc voltage bus will be less than the electric capacity quantity in two dc voltage buses.
Through with reference to figure 4, show traditional non-isolation type list dc voltage bus UPS.The output voltage level and the input voltage step that should be noted in the discussion above that inverter must be retained as same-phase, and be identical forever with the current potential positive-negative phase of input to keep output, otherwise owing to be non-isolation type, can cause unusual loop current.For example when frequency converter (inverter) when being output as positive half cycle; Switch Qa must conducting positive voltage to make frequency converter (inverter) switch; If city's electric potential of this moment input is not the positive voltage in the same way; But during negative voltage, then will produce the unusual loop current phenomenon shown in Fig. 4 dotted line.In like manner, when frequency converter (inverter) when being output as negative half period,, also have the situation of unusual loop current generation misoperation if when city's electric potential is in harmony for forward.
Therefore; Bad when the civil power quality of input, when frequency variation was too fast, problem can take place in foregoing structure; Especially when the AC power of input be during from commercially available generator; Because of the frequency variation of generator is exceedingly fast, more must purify the input power supply, but foregoing structure obviously can't reach requirement by ups system.Need the non-isolation type list dc voltage bus configuration UPS that can solve above-mentioned shortcoming.
The one Chinese patent application that application number is 03132869.5, the applying date is on July 24th, 2003 discloses non-isolation type ac power supply apparatus and control method thereof, the problem that is caused when solving the AC power input with AC power output voltage out of phase.When the output voltage phase place of the voltage-phase of the alternating current input power supplying of said supply unit and this supply unit is inequality; Be that the current potential of input voltage and output voltage is when being in different positive and negative potential regions; Supply unit is operated in speeds to return pattern; The energy of civil power input is stored in earlier in the inductance of ac/dc converting unit and directly is not supplied to load; Release energy to bus capacitance by said inductance afterwards, and then supply power and give load, thereby avoid input and output that unusual loop current takes place.
But owing to will system be controlled at respectively according to input and output phase place situation and speed to return pattern or boost mode, and the design of inductance L 1 will meet the demand of speed the to do over again operation mode and the mode of operation of boosting simultaneously, and this exists certain restriction and difficulty to circuit designers.In order to address the above problem, must provide a kind of and can import the different phase times of power supply with out-put supply, control method is simple and inductance L 1 design is easy, and can stably be the control method of out-put supply supplying energy.
Summary of the invention
For implementing aforementioned purpose; The control method that a kind of non-isolation type uninterrupted power supply(ups) is provided of the present invention; Be applied to the supply unit of a reception alternating current input power supplying, said supply unit comprises, an ac/dc converting unit; Its input connects alternating current input power supplying, and this alternating current input power supplying has the neutral line; One AC/DC converting unit connects the output of said ac/dc converting unit, converts direct current to ac output voltage and supplies power to load, and the output of this AC/DC converting unit connects this neutral line; One bus capacitance is connected between said ac/dc converting unit and the AC/DC converting unit, is used to store the direct current energy that the ac/dc converting unit is exported; One inductance is used to store the energy that said ac/dc converting unit is changed, and releases energy then to this bus capacitance; One is equipped with source circuit, is connected between this alternating current input power supplying and this bus capacitance, it is characterized in that said method comprises:
When the voltage-phase of the out-put supply of the voltage-phase of the alternating current input power supplying of said supply unit and this supply unit not simultaneously; Make this supply unit work in a park mode; Suspend its ac/dc converting unit; Directly export required energy by this inductance and this bus capacitance, thereby stop the unusual loop current between input voltage and output voltage for this AC/DC converting unit provides.
Preferably; When the stored energy shortage of this bus capacitance is exported required energy with supply; Then being equipped with source circuit through this supplies power to this bus capacitance; Thereby make this bus capacitance can obtain enough energy for should the AC/DC converting unit the required energy of output, between the input voltage of avoiding this supply unit and output voltage unusual loop current to take place.
Preferably; When the voltage-phase of the voltage-phase of the alternating current input power supplying that inputs to said supply unit and the out-put supply of said supply unit is identical; This supply unit is operated under the boost mode; Store the required energy that boosts earlier by this inductance, release energy to improve the voltage of said bus capacitance by said inductance again.
For reaching above-mentioned purpose, the present invention provides a kind of non-isolation type uninterrupted power supply(ups), it is characterized in that, comprising:
One ac/dc converting unit, its input connects alternating current input power supplying, and this alternating current input power supplying has a neutral line;
One AC/DC converting unit connects the output of aforementioned ac/dc converting unit, converts direct current to ac output voltage and supplies power to a load, and the output of this AC/DC converting unit connects this neutral line;
One bus capacitance is connected between said ac/dc converting unit and the AC/DC converting unit, is used to store the direct current energy that the ac/dc converting unit is exported;
One inductance is used to store the energy that said ac/dc converting unit is changed, and releases energy then to this bus capacitance; And
One is equipped with source circuit, is connected between this alternating current input power supplying and this bus capacitance;
Wherein, When the voltage-phase of the out-put supply of the voltage-phase of the alternating current input power supplying of said supply unit and this supply unit not simultaneously; Make this supply unit work in a park mode; Suspend this ac/dc converting unit, directly export required energy by this inductance and this bus capacitance, thereby stop the unusual loop current between input voltage and output voltage for this AC/DC converting unit provides.
Preferably; When the stored energy shortage of this bus capacitance is exported required energy with supply; Then being equipped with source circuit through this supplies power to this bus capacitance; Thereby make this bus capacitance can obtain enough energy for should the AC/DC converting unit the required energy of output, between the input voltage of avoiding this supply unit and output voltage unusual loop current to take place.
Preferably, the said source circuit that is equipped with comprises: be connected to a battery charger of alternating current input power supplying, a DC to DC converter that is connected to these bus capacitance two ends, a battery that in the middle of this battery charger and this DC to DC converter, is connected and as a thyristor of cell switch.
Preferably, said when the stored energy shortage of this bus capacitance during with the required energy of supply output, through said backup battery circuit this bus capacitance being supplied power comprises following three kinds of modes:
Alternating current input power supplying is that said bus capacitance provides required energy through this battery charger with this DC to DC converter, and this moment, this thyristor was in cut-off state; Perhaps
This thyristor of conducting, battery are that bus capacitance provides required energy through thyristor and DC to DC converter; Perhaps
Alternating current input power supplying is that said bus capacitance provides required energy through this battery charger with this DC to DC converter, and simultaneously through this thyristor of conducting, making battery is that bus capacitance provides required energy through thyristor and DC to DC converter also.
Preferably, the said source circuit that is equipped with comprises: be connected to a battery charger of alternating current input power supplying, a battery that in the middle of bus capacitance and battery charger, is connected and as a thyristor of cell switch.
Preferably, said when the stored energy shortage of this bus capacitance during with the required energy of supply output, through said backup battery circuit this bus capacitance being supplied power comprises following three kinds of modes:
Alternating current input power supplying provides required energy through the said bus capacitance of this battery charger, and this moment, this thyristor was in cut-off state; Perhaps
This thyristor of conducting, battery are that bus capacitance provides required energy through thyristor; Perhaps
Alternating current input power supplying is that said bus capacitance provides required energy through this battery charger, and simultaneously through this thyristor of conducting, making battery is that bus capacitance provides required energy through thyristor also.
Preferably, aforementioned ac/dc converting unit includes:
One full-bridge rectifier; Two outputs of this full-bridge rectifier are connected with diverter switch respectively; In between two diverter switches, be connected with this inductance; One end of this inductance connects the anode of diode, and the other end of this inductance connects the negative electrode of another diode, and two diodes do not connect two ends that the other end of this inductance then connects aforementioned bus capacitance to constitute the monobus framework.
Preferably, aforementioned AC/DC converting unit is a full-bridge frequency converter.
Preferably; When the output voltage phase place of the voltage-phase of the alternating current input power supplying that inputs to said supply unit and said supply unit is identical; This ac/dc converting unit works under the boost mode; Store the required energy that boosts by this inductance earlier, release energy to improve the voltage of said bus capacitance by said inductance again.
Through suitably being chosen in the operator scheme of carrying out on the power-supply device, even during the alternating current input power supplying bad, power-supply device of the present invention still can be by the anxiety of normal operation and no abnormal loop current.
Moreover; Because the ups system overwhelming majority can do lock phase (Phase Lock) action to the input power supply; Therefore the most of the time of UPS all is input voltage and is in the positive negative potential of homophase with input voltage; Supply unit of the present invention still can operate mainly under the boost mode (Boost mode), thereby obtain higher operating efficiency.
Description of drawings
When combining accompanying drawing, other purpose of the present invention, advantage and novel characteristics will become more obvious from following detailed.
Fig. 1 is the circuit diagram of dissimilar conventional non-isolated type dc voltage bus configuration to Fig. 3;
Fig. 4 is the circuit diagram of a conventional non-isolated type list dc voltage bus configuration;
Fig. 5 is the circuit framework figure according to first embodiment of the invention;
Fig. 6 is the action sequence sketch map of circuit of the present invention;
Circuit operation figure when Fig. 7 has explained and all has been switched on according to two switch Q1 of the embodiment of the invention and Q2, wherein alternating current input power supplying is a positive phase;
Fig. 8 explained that the first switch Q1 according to the embodiment of the invention is switched on and second switch Q2 by the time circuit operation figure, wherein alternating current input power supplying is a positive phase;
Circuit operation figure when Fig. 9 has explained and all has been switched on according to two switch Q1 of the embodiment of the invention and Q2, wherein alternating current input power supplying is a minus phase;
Figure 10 explained according to the first switch Q1 of the embodiment of the invention by and the circuit operation figure of second switch Q2 when being switched on, wherein alternating current input power supplying is a minus phase;
Figure 11 explained according to two switch Q1 of the embodiment of the invention and Q2 all by by the time circuit operation figure;
Figure 12 is circuit framework figure according to another embodiment of the present invention.
Reference numeral:
In having, Qa, Qb build the switching tube of diode
10,110 alternating current input power supplyings
20,120 ac/dc converting units
21,121 full-bridge rectifiers
30,130 AC/DC converting units
40,140 loads
60,160 are equipped with source circuit
61,161 battery chargers
62 DC to DC converter
63,163 batteries
Q1, Q2 diverter switch
Q11, Q12 diverter switch
In having, builds Q3 to Q6 the switching tube of diode
In having, builds Q13 to Q16 the switching tube of diode
D1 to D6 diode
D11 to D14 diode
D7, D17 thyristor
C1, C11 bus capacitance (BUS electric capacity)
C2, C12 output capacitance
L1, L11 inductance
L2, L12 outputting inductance
Embodiment
With reference now to accompanying drawing, introduces illustrative embodiments of the present invention; Yet; The present invention can implement with many different forms; And be not limited to embodiment described herein, it is for openly the present invention at large and fully that these embodiment are provided, and fully passes on scope of the present invention to the person of ordinary skill in the field.Term in the expression illustrative embodiments in the accompanying drawings is not to qualification of the present invention.In the accompanying drawings, identical cells/elements is used identical Reference numeral.
" one ", " one ", " said " and " being somebody's turn to do " of using except as otherwise noted, also comprise plural form here.In addition; Should be understood that; The term that uses in this specification " comprises ", " comprising " and/or " containing "; Specified some characteristics, entity, step, operation, unit and/or element, but the group of not getting rid of one or more characteristics, entity, step, operation, unit, element and/or forming by them.Should be understood that when the unit is called as " connection " or " coupling " when another unit, it can be directly to be connected with another unit or to be coupled, and also can have temporary location.In addition, " connection " of indication or " coupling " comprise wireless connections or coupling here.The term that here uses " and/or " comprise one or more than the combination in any and all combinations of listed relevant item.
Except as otherwise noted, the term (comprising scientific and technical terminology) that here uses has the common implication of understanding to the person of ordinary skill in the field.In addition, it is understandable that the term so that normally used dictionary limits is appreciated that with the linguistic context of its association area to have consistent implication, and should be understood that Utopian or too formal meaning.
Fig. 5 is the circuit framework figure of non-isolation type monobus of the present invention (single BUS) uninterrupted power supply(ups) first embodiment.As shown in Figure 5, the circuit of this uninterrupted power supply(ups) comprises: an alternating current input power supplying 10, ac/dc converting unit 20, an AC/DC converting unit 30 and are equipped with source circuit 60.
Said ac/dc converting unit 20, its input connects alternating current input power supplying 10, and alternating current input power supplying 10 provides alternating current input power supplying.Wherein, This ac/dc converting unit 20 comprises a full-bridge rectifier 21, and two outputs of said full-bridge rectifier 21 connect diverter switch Q1, Q2 respectively, between diverter switch Q1, Q2, connects an inductance L 1; And; These inductance L 1 two ends diode D1, D2 that is reverse setting that connect out of the ordinary, two diode D1, D2 is multiply-connected meets bus capacitance C1 (BUS electric capacity), thereby constitutes the framework of single BUS.
Said AC/DC converting unit 30 connects the output of previous stage ac/dc converting unit 20.In the present embodiment, AC/DC converting unit 30 comprises the full-bridge frequency converter that switching tube Q3～Q6 of building diode in having by four constitutes, and it converts direct current energy that bus capacitance C1 (BUS electric capacity) stores to AC power, and to a load 40 power supplies.Wherein, the output of above-mentioned full-bridge frequency converter connects an outputting inductance L2 and an output capacitance C2, and the neutral line of alternating current input power supplying 10 is connected directly to output capacitance C2, becomes the neutral line of output.
The said source circuit 60 that is equipped with comprises: battery charger 61, DC-DC (DC/DC) converter 62 and battery 63, it also comprises diode D3, D4 and thyristor D7.Wherein, the said input that is equipped with source circuit 60 is connected with alternating current input power supplying 10, and the said output that is equipped with source circuit 60 is connected with the two ends of bus capacitance C1.Concrete annexation is that two inputs of battery charger 61 are connected with the two ends of alternating current input power supplying 10.The output of battery charger 61 connects the negative pole of Anode and battery 63 of anode, the diode D4 of diode D 3 respectively.The negative electrode of diode D3 is connected to input of DC/DC converter and the negative electrode of thyristor D7; In addition, the negative electrode of diode D4 is connected to the positive pole of the Anode and battery 63 of thyristor D7, and the input of DC/DC converter and the negative pole of battery 63 are connected.The output two ends of DC/DC converter then are connected with the two ends of bus capacitance C1 (BUS electric capacity) respectively with D6 through the diode D5 that is reverse setting.
Figure 12 is the circuit diagram of the embodiment of another non-isolation type monobus of the present invention (single BUS) uninterrupted power supply(ups).Shown in figure 12, the circuit of uninterrupted power supply(ups) comprises: an alternating current input power supplying 110, an ac/dc converting unit 120, an AC/DC converting unit 130 and are equipped with source circuit 160.
The input of said ac/dc converting unit 120 connects alternating current input power supplying 110, and alternating current input power supplying 110 provides alternating current input power supplying.Wherein, Ac/dc converting unit 120 comprises a full-bridge rectifier 121, and two outputs of said full-bridge rectifier 121 connect diverter switch Q11, Q12 respectively, between two diverter switch Q11, Q12, connects inductance L 11; And; These inductance L 11 two ends diode D11, D12 that is reverse setting that connect out of the ordinary, diode D11, D12 is multiply-connected meets bus capacitance C11 (BUS electric capacity), thereby constitutes the framework of single BUS.
Said AC/DC converting unit 130 connects the output of previous stage ac/dc converting unit 120.In the present embodiment, AC/DC converting unit 130 comprises the full-bridge frequency converter that switching tube Q13～Q16 of building diode in having by four constitutes, and it converts direct current energy that bus capacitance C1 (BUS electric capacity) stores to AC power, and to load 140 power supplies.Wherein, the output of above-mentioned full-bridge frequency converter connects outputting inductance L12 and output capacitance C12, and the neutral line of alternating current input power supplying 110 is connected directly to output capacitance C12, becomes the neutral line of output.
The said source circuit 160 that is equipped with comprises: battery charger 161 and battery 163, it also comprises diode D13, D14 and thyristor D17.Wherein, the said input that is equipped with source circuit 160 is connected with the two ends of alternating current input power supplying 110, and stating fully, the output of source circuit 160 is connected with the two ends of bus capacitance C11.Concrete annexation is that two inputs of battery charger 161 are connected with the two ends of alternating current input power supplying 10 respectively.The output of battery charger 161 connects the negative pole of Anode and battery 163 of anode, the diode D14 of diode D13 respectively.The negative electrode of diode D13 is connected to the positive pole of bus capacitance C11; In addition, the negative electrode of diode D14 is connected to the positive pole of the Anode and battery 163 of thyristor D17, and the negative electrode of said thyristor D17 is connected to the negative electrode of diode D13; One output of battery charger 161 also is connected with battery 163 negative poles with the negative terminal of said bus capacitance C11.
And, can operate in following several modes according to the situation of alternating current input power supplying about the circuit operation of previous embodiment, describe below in conjunction with first execution mode of the present invention:
One. park mode (Paused Mode)
Park mode of the present invention is applied to situation frequency variation when alternating current input power supplying 10 when very big; For example the source is the generator of inferior quality; Can allow the present invention to accept any frequency input power supply of change fast; Prevent the different phase times of input voltage phase by this with output voltage, due to unusual loop current.
Fig. 6 is the action sequence sketch map of circuit of the present invention; With reference to the D among Fig. 6, two sections of H, when the input power supply of alternating current input power supplying 10 is a positive potential, and out-put supply is when being negative potential; Make this ac/dc converting unit 20 get into park mode; Diverter switch Q1, Q2 are set to cut-off state, and the switching tube Q3 that builds diode in having simultaneously is set to conducting state, and the switching tube Q4 that builds diode in having is set to cut-off state; And after diverter switch Q1, Q2 all ended synchronously, energy stored on this moment inductance L 1 can be shown in Figure 11 like circuit operation, discharges and give this bus capacitance C1, and this moment is by this AC/DC converting unit 30 of bus capacitance C1 supply, and then supply power and give load 40.
When the various durations of the voltage-phase of input power supply and out-put supply long; So that bus capacitance C1 energy stored is consumed to when being not enough to supply the demand of AC/DC converting unit 30; For bus capacitance C1 electric energy is provided by being equipped with source circuit 60; Be that AC/DC converting unit 30 provides institute's energy requirement by bus capacitance C1 again, thereby its required energy be provided for load 40.
With reference to the B among Fig. 6, two sections of F; When the input power supply of alternating current input power supplying 10 is a negative potential; And out-put supply makes this ac/dc converting unit 20 get into park modes when being positive potential, and diverter switch Q1, Q2 are set to cut-off state; The switching tube Q4 that builds diode in having simultaneously is set to conducting state, and the switching tube Q3 that builds diode in having is set to cut-off state; And after diverter switch Q1, Q2 all end synchronously; This moment inductance L 1 on energy stored; Can be shown in Figure 11 like circuit operation; Figure 11 explained according to two switch Q1 of the embodiment of the invention and Q2 all by by the time circuit operation figure, discharge and give this bus capacitance C1, give load 40 by bus capacitance C1 supply again.
When the various durations of the voltage-phase of input power supply and out-put supply long; So that bus capacitance C1 energy stored is consumed to when being not enough to supply the demand of AC/DC converting unit 30; For bus capacitance C1 electric energy is provided by being equipped with source circuit 60; Be that AC/DC converting unit 30 provides institute's energy requirement by bus capacitance C1 again, thereby its required energy be provided for load 40.
According to preferred implementation of the present invention, can be by bus capacitance C1 energy stored supply AC/DC converting unit 30, to be supplied in load 40; As oversize because of the phase place different time, bus capacitance C1 energy stored when being not enough to supply AC/DC converting unit 30 demands, then starting this and is equipped with source circuit 60 after consuming, to supply electric power with 1 energy requirement of supporting bus capacitor C.
Thereby for providing required energy, bus capacitance C1 comprises following three kinds of modes by being equipped with source circuit 60 supply electric energy:
Directly for bus capacitance C1 required energy is provided through battery charger 61 and DC/DC converter 62 by alternating current input power supplying 10, this moment, thyristor D7 was in cut-off state; Perhaps
Conducting thyristor D7 provides required energy through DC/DC converter 62 for bus capacitance C1 by battery 63; Perhaps
By alternating current input power supplying 10 can be that said bus capacitance provides required energy with this DC to DC converter through this battery charger 61; And this thyristor of conducting simultaneously makes battery also can for bus capacitance required energy be provided simultaneously through thyristor and DC to DC converter.
Two. boost mode (Boost Mode)
When alternating current input power supplying 10 and the out-put supply that installs are in same positive potential position or negative potential interval, make supply unit work in boost mode, and needn't use aforesaid park mode, to improve system effectiveness.
Please with reference to A, E two sections of Fig. 6, when alternating current input power supplying 10 is a positive potential, and when exchanging out-put supply and also being positive potential, diverter switch Q1 keeps conducting state always, and another diverter switch Q2 is controlled by the PWM pwm signal.Wherein, if diverter switch Q2 is when being conducting state, current path is as shown in Figure 7, the circuit operation figure when Fig. 7 has explained and all has been switched on according to two switch Q1 of the embodiment of the invention and Q2, and wherein alternating current input power supplying is a positive phase; If diverter switch Q2 is when being cut-off state, current path is as shown in Figure 8, explained that the first switch Q1 according to the embodiment of the invention is switched on and second switch Q2 by the time circuit operation figure, wherein alternating current input power supplying is a positive phase.At this moment, should maintained switch crystal Q3 be off-state, to avoid unusual loop current.
In addition, with reference to C, G two sections of Fig. 6, when the out-put supply of alternating current input power supplying 10 and device was in identical negative potential interval, supply unit worked in boost mode equally.At this moment, diverter switch Q2 keeps conducting state, and another diverter switch Q1 is controlled by the PWM pwm signal.Wherein, when diverter switch Q1 was conducting state, its current path was as shown in Figure 9, the circuit operation figure when Fig. 9 has explained and all has been switched on according to two switch Q1 of the embodiment of the invention and Q2, and wherein alternating current input power supplying is a minus phase; When if diverter switch Q1 is cut-off state; Its current path is shown in figure 10; Figure 10 explained according to the first switch Q1 of the embodiment of the invention by and the circuit operation figure of second switch Q2 when being switched on; Wherein alternating current input power supplying is a minus phase, should maintained switch crystal Q4 be off-state, to avoid unusual loop current.
No matter being in positive and negative potential region, all is to make inductance L 1 store the required energy that boosts, and is released energy to promote bus capacitance C1 voltage, to reach the high efficiency running by this inductance L 1 again.
In sum, power supply technique of the present invention, unstable for input civil power quality, when frequency change is quick, can avoid civil power and output voltage because of the different problems that cause of phase place by a park mode (Paused Mode); Moreover, for the preferable civil power input of quality, also can select for use boost mode (Boost Mode) to improve the operating efficiency of single unit system, compared to present power supply power supply technique, the present invention has progressive really and meets the patent of invention important document, files an application in accordance with the law.
Claims (16)
1. the control method of a non-isolation type uninterrupted power supply(ups); Be applied to the supply unit of a reception alternating current input power supplying, said supply unit comprises, an ac/dc converting unit; Its input connects alternating current input power supplying, and this alternating current input power supplying has the neutral line; One AC/DC converting unit connects the output of said ac/dc converting unit, converts direct current to ac output voltage and supplies power to load, and the output of this AC/DC converting unit connects this neutral line; One bus capacitance is connected between said ac/dc converting unit and the AC/DC converting unit, is used to store the direct current energy that the ac/dc converting unit is exported; One inductance is used to store the energy that said ac/dc converting unit is changed, and releases energy then to this bus capacitance; One is equipped with source circuit, is connected between this alternating current input power supplying and this bus capacitance, it is characterized in that said method comprises:
When the voltage-phase of the out-put supply of the voltage-phase of the alternating current input power supplying of said supply unit and this supply unit not simultaneously; Make this supply unit work in a park mode; Suspend its ac/dc converting unit; Directly export required energy by this inductance and this bus capacitance, thereby stop the unusual loop current between input voltage and output voltage for this AC/DC converting unit provides.
2. method according to claim 1; It is characterized in that; When the stored energy shortage of this bus capacitance is exported required energy with supply; Then be equipped with source circuit this bus capacitance supplied power through this, thus make this bus capacitance can obtain enough energy for should the AC/DC converting unit the required energy of output, between the input voltage of avoiding this supply unit and output voltage unusual loop current to take place.
3. method according to claim 1; It is characterized in that; When the voltage-phase of the voltage-phase of the alternating current input power supplying that inputs to said supply unit and the out-put supply of said supply unit is identical; This supply unit is operated under the boost mode, stores the required energy that boosts earlier by this inductance, is released energy to improve the voltage of said bus capacitance by said inductance again.
4. method according to claim 1; It is characterized in that the said source circuit that is equipped with comprises: be connected to a battery charger of alternating current input power supplying, a DC to DC converter that is connected to these bus capacitance two ends, a battery that in the middle of this battery charger and this DC to DC converter, is connected and as a thyristor of cell switch.
5. method according to claim 4 is characterized in that, and is said when the stored energy shortage of this bus capacitance during with the required energy of supply output, is equipped with source circuit through this and said bus capacitance is supplied power comprises following three kinds of modes:
Alternating current input power supplying is that said bus capacitance provides required energy through this battery charger with this DC to DC converter, and this moment, this thyristor was in cut-off state; Perhaps
This thyristor of conducting, battery are that bus capacitance provides required energy through thyristor and DC to DC converter; Perhaps
Alternating current input power supplying is that said bus capacitance provides institute's energy requirement through this battery charger with this DC to DC converter, this thyristor of conducting simultaneously, and battery is that bus capacitance provides required energy through thyristor and DC to DC converter also.
6. method according to claim 1 is characterized in that, the said source circuit that is equipped with comprises: be connected to a battery charger of alternating current input power supplying, a battery that in the middle of bus capacitance and battery charger, is connected and as a thyristor of cell switch.
7. method according to claim 6 is characterized in that, and is said when the stored energy shortage of this bus capacitance during with the required energy of supply output, is equipped with source circuit through this and said bus capacitance is supplied power comprises following three kinds of modes:
Alternating current input power supplying is that said bus capacitance provides required energy through this battery charger, and this moment, this thyristor was in cut-off state; Perhaps
This thyristor of conducting, battery are that bus capacitance provides required energy through thyristor; Perhaps
Alternating current input power supplying is that said bus capacitance provides institute's energy requirement through this battery charger, and simultaneously through this thyristor of conducting, battery is that bus capacitance provides required energy through thyristor also.
8. a non-isolation type uninterrupted power supply(ups) is characterized in that, comprising:
One ac/dc converting unit, its input connects alternating current input power supplying, and this alternating current input power supplying has a neutral line;
One AC/DC converting unit connects the output of aforementioned ac/dc converting unit, converts direct current to ac output voltage and supplies power to a load, and the output of this AC/DC converting unit connects this neutral line;
One bus capacitance is connected between said ac/dc converting unit and the AC/DC converting unit, is used to store the direct current energy that the ac/dc converting unit is exported;
One inductance is used to store the energy that said ac/dc converting unit is changed, and releases energy then to this bus capacitance; And
One is equipped with source circuit, is connected between this alternating current input power supplying and this bus capacitance;
Wherein, When the voltage-phase of the out-put supply of the voltage-phase of the alternating current input power supplying of said supply unit and this supply unit not simultaneously; Make this supply unit work in a park mode; Suspend this ac/dc converting unit, directly export required energy by this inductance and this bus capacitance, thereby stop the unusual loop current between input voltage and output voltage for this AC/DC converting unit provides.
9. non-isolation type ac power supply apparatus according to claim 8; It is characterized in that; When the stored energy shortage of this bus capacitance is exported required energy with supply; Then be equipped with source circuit this bus capacitance supplied power through this, thus make this bus capacitance can obtain enough energy for should the AC/DC converting unit the required energy of output, between the input voltage of avoiding this supply unit and output voltage unusual loop current to take place.
10. non-isolation type ac power supply apparatus according to claim 8 is characterized in that,
The said source circuit that is equipped with comprises: be connected to a battery charger of alternating current input power supplying, a DC to DC converter that is connected to these bus capacitance two ends, a battery that in the middle of this battery charger and this DC to DC converter, is connected and as a thyristor of cell switch.
11. non-isolation type ac power supply apparatus according to claim 10; It is characterized in that; Said when the stored energy shortage of this bus capacitance during with the required energy of supply output, through said backup battery circuit this bus capacitance being supplied power comprises following three kinds of modes:
Alternating current input power supplying is that said bus capacitance provides required energy through this battery charger with this DC to DC converter, and this moment, this thyristor was in cut-off state; Perhaps
This thyristor of conducting, battery are that bus capacitance provides required energy through thyristor and DC to DC converter; Perhaps
Alternating current input power supplying is that said bus capacitance provides required energy through this battery charger with this DC to DC converter, and simultaneously through this thyristor of conducting, making battery is that bus capacitance provides required energy through thyristor and DC to DC converter also.
12. non-isolation type ac power supply apparatus according to claim 8; It is characterized in that the said source circuit that is equipped with comprises: be connected to a battery charger of alternating current input power supplying, a battery that in the middle of bus capacitance and battery charger, is connected and as a thyristor of cell switch.
13. non-isolation type ac power supply apparatus according to claim 12; It is characterized in that; Said when the stored energy shortage of this bus capacitance during with the required energy of supply output, be equipped with source circuit through this and said bus capacitance is supplied power comprise following three kinds of modes:
Alternating current input power supplying is that said bus capacitance provides required energy through this battery charger, and this moment, this thyristor was in cut-off state; Perhaps
This thyristor of conducting, battery are that bus capacitance provides required energy through thyristor; Perhaps
Alternating current input power supplying is that said bus capacitance provides institute's energy requirement through this battery charger, and simultaneously through this thyristor of conducting, battery is that bus capacitance provides required energy through thyristor also.
14. non-isolation type ac power supply apparatus according to claim 8 is characterized in that, said ac/dc converting unit comprises:
One full-bridge rectifier; Two outputs of this full-bridge rectifier are connected with diverter switch respectively; In between two diverter switches, be connected with this inductance; One end of this inductance connects the anode of diode, and the other end of this inductance connects the negative electrode of another diode, and two diodes do not connect two ends that the other end of this inductance then connects aforementioned bus capacitance to constitute the monobus framework.
15. non-isolation type ac power supply apparatus according to claim 8 is characterized in that, said AC/DC converting unit is a full-bridge frequency converter.
16. non-isolation type ac power supply apparatus according to claim 8; It is characterized in that; When the output voltage phase place of the voltage-phase of the alternating current input power supplying that inputs to said supply unit and said supply unit is identical; This ac/dc converting unit works under the boost mode, stores the required energy that boosts by this inductance earlier, is released energy to improve the voltage of said bus capacitance by said inductance again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105214653A CN102457191A (en) | 2010-10-21 | 2010-10-21 | Non-isolation type uninterruptible power supply device and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105214653A CN102457191A (en) | 2010-10-21 | 2010-10-21 | Non-isolation type uninterruptible power supply device and control method thereof |
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| Publication Number | Publication Date |
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| CN102457191A true CN102457191A (en) | 2012-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105214653A Pending CN102457191A (en) | 2010-10-21 | 2010-10-21 | Non-isolation type uninterruptible power supply device and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105846532A (en) * | 2015-01-13 | 2016-08-10 | 伊顿制造（格拉斯哥）有限合伙莫尔日分支机构 | Uninterrupted power source and control method therefor |
| CN108475914A (en) * | 2016-01-19 | 2018-08-31 | 布利克斯特科技公司 | Circuit for disconnecting alternating current |
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| JP2007221902A (en) * | 2006-02-16 | 2007-08-30 | Mitsubishi Electric Corp | Power conversion device |
| US20080143187A1 (en) * | 2006-12-19 | 2008-06-19 | Fokke Hoekstra | Current sensor apparatus and method for uninterruptible power supply |
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| US20050036345A1 (en) * | 2003-08-13 | 2005-02-17 | Yi-Min Lin | Non-isolated AC power supply device and method for control the same |
| JP2007221902A (en) * | 2006-02-16 | 2007-08-30 | Mitsubishi Electric Corp | Power conversion device |
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| CN105846532A (en) * | 2015-01-13 | 2016-08-10 | 伊顿制造（格拉斯哥）有限合伙莫尔日分支机构 | Uninterrupted power source and control method therefor |
| CN108475914A (en) * | 2016-01-19 | 2018-08-31 | 布利克斯特科技公司 | Circuit for disconnecting alternating current |
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Application publication date: 20120516 |