CN100379119C - Conversion device with power factor correcting and DC-DC conversion function - Google Patents
Conversion device with power factor correcting and DC-DC conversion function Download PDFInfo
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- CN100379119C CN100379119C CNB2005100657048A CN200510065704A CN100379119C CN 100379119 C CN100379119 C CN 100379119C CN B2005100657048 A CNB2005100657048 A CN B2005100657048A CN 200510065704 A CN200510065704 A CN 200510065704A CN 100379119 C CN100379119 C CN 100379119C
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The present invention provides a conversion device with the functions of power factor correction and DC-DC conversion, which comprises an electric energy storing and supplying device, an inverter, a transformer, a rectifying filter and a power factor correcting and converting device, wherein the electric energy storing and supplying device is used for providing a DC voltage; the input end of the inverter is electrically connected with the electric energy storing and supplying device; the primary side of the transformer is electrically connected with the output end of the inverter; the input end of the rectifying filter is electrically connected with the secondary side of the transformer; the input end of the power factor correcting and converting device is electrically connected with an AC input voltage, and the power factor correcting and converting device is coupled with the output end of the rectifying filter. When the AC input voltage is normal, the conversion device outputs an AC output voltage through converting the AC input voltage by the power factor correcting and converting device; whereas when the AC input voltage is abnormal, the conversion device outputs the AC output voltage through converting a DC voltage by the inverter, the transformer, the rectifying filter and the power factor correcting and converting device together.
Description
Technical field
The present invention relates to a kind of conversion equipment, refer to a kind of conversion equipment that is applicable to online uninterrupted power supply system especially with power factor correction and DC-DC conversion function.
Background technology
For online uninterrupted power supply system, three kinds of mode of operations are arranged generally: line model, non-firm power pattern and bypass mode.When being in ray mode, civil power provides an ac output voltage via a converter (inverter) and a power factor correction (PFC) transducer to load; And that civil power takes place is unusual, when system is in the non-firm power pattern, just changing by a battery provides this ac output voltage via a converter and a DC-to-DC converter to load.
For the consideration on the safety, the output voltage of online uninterrupted power supply system must be total to center line with the civil power of input.For online uninterrupted power supply system, be to realize this point by output isolation transformer with an output transformer; Yet, for the online uninterrupted power supply system that does not have this output transformer, positive and negative two kinds of direct voltages that then must make power factor correction converter and DC-to-DC converter all can export to link to each other with the civil power center line, these two kinds of direct voltages are exported via the conversion of converter and the civil power ac output voltage of center line altogether again.Operating principle can be with reference to the explanation of cases such as United States Patent (USP) U.S.Patent Number 6,661,678 and 5,654,591 in detail.
See also Fig. 1, it is a kind of traditional conversion equipment with power factor correction and DC-DC conversion function (with 10 expressions), and it is made of a power factor correction converter and a DC-to-DC converter.Wherein, AC-input voltage Vac, relay J 1, filter inductance L3, rectifier diode D9 and D10, power switch S3 and S4, diode D11 and D12 and filter capacitor C1 and C2 have constituted this power factor correction converter jointly.Battery VBat, power switch S1 and S2, transformer Tr, diode D1～D8, filter inductance L1 and L2, filter capacitor C1 and C2 have then constituted this DC-to-DC converter jointly.
The conversion equipment 10 that Fig. 1 painted, when AC-input voltage Vac supply just often, relay J 1 can be connected with filter inductance L3, with the translation function of realization power factor correction; And supply when unusual at AC-input voltage Vac, 1 of relay J can disconnect and being connected of filter inductance L3, and makes this DC-to-DC converter realize DC-DC conversion function.
The positive bus voltage BUS+ of the output of conversion equipment 10 and negative bus voltage BUS-export a low-frequency sine voltage again and give load after the converter change of current; In the positive half period of this low-frequency sine voltage, positive bus voltage BUS+ has power output, and negative bus voltage BUS-does not have power output; And in the negative half-cycle of this low-frequency sine voltage, then be that negative bus voltage BUS-has power output, and positive bus voltage BUS+ does not have power output.
In the conversion equipment 10 that Fig. 1 painted, DC-to-DC converter and power factor transducer are independently two cover circuit of difference.With regard to DC-to-DC converter, in order to realize two voltage outputs, its secondary side at transformer Tr has adopted two cover circuit; Comprise two secondary side winding, two rectifier bridges (constituting) and two filter inductance L1, L2 by D1～D8.Utilize this two covers circuit, just can carry out DC-to-DC when conversion, make its alternation in the positive half period of low frequency output voltage and negative half-cycle respectively.
Yet this traditional conversion equipment with power factor correction and DC-DC conversion function 10 causes utilization rate low because the quantity of the electronic building brick that is adopted is too much, has improved the cost of manufacture of total system, therefore demands urgently improving.
Summary of the invention
The objective of the invention is provides a kind of conversion equipment with power factor correction and DC-DC conversion function that is applicable to online uninterrupted power supply system for the problem that solves the prior art existence, it utilizes power factor correction converter to participate in realizing that pair method of the DC-DC conversion function of voltages output constitutes the non-firm power pattern of online uninterrupted power supply system, can significantly reduce the usage quantity of the electronic building brick of online uninterrupted power supply system, the power density of elevator system reduces manufacturing cost.
For achieving the above object, the invention provides a kind of conversion equipment, comprising with power factor correction and DC-DC conversion function: an electrical power storage feeding mechanism, in order to a direct current voltage to be provided; One converter (inverter), its input are electrically connected to this electrical power storage feeding mechanism; One transformer, its primary side is electrically connected to the output of this converter; One rectifier filter, its input is electrically connected to the secondary side of this transformer; And power factor correction (PFC) transducer, its input is electrically connected to an AC-input voltage, and this power factor correction converter also is coupled to the output of this rectifier filter; When this AC-input voltage just often, this conversion equipment is changed this AC-input voltage by this power factor correction converter and is exported an ac output voltage, and when this AC-input voltage was unusual, this conversion equipment was changed this direct voltage jointly by this converter, this transformer, this rectifier filter and this power factor correction converter and is exported this ac output voltage.
According to above-mentioned conception, wherein this electrical power storage feeding mechanism is a battery.
According to above-mentioned conception, wherein this converter one is recommended (push-pull) circuit for what be made of two grid control its switch, and described grid control its switch has a reverse parallel connection diode respectively.
According to above-mentioned conception, wherein this converter is a half-bridge (half-bridge) circuit that is made of two grid control its switch, and described grid control its switch has a reverse parallel connection diode and a parasitic capacitance respectively.
According to above-mentioned conception, wherein this converter is a full-bridge (full-bridge) circuit that is made of four grid control its switch, and described grid control its switch has a reverse parallel connection diode respectively.
According to above-mentioned conception, wherein this grid control its switch is a power MOSFET, and this reverse parallel connection diode is the parasitic reverse parallel connection diode of this power MOSFET.
According to above-mentioned conception, wherein this rectifier filter comprises a bridgt circuit at least.
According to above-mentioned conception, wherein this rectifier filter also comprises one first filter inductance that couples with this bridgt circuit.
According to above-mentioned conception, wherein this bridgt circuit is an all-wave (full-wave) circuit that is made of two diodes.
According to above-mentioned conception, wherein this bridgt circuit is one times of stream (currentdouble) circuit that is made of two diodes.
According to above-mentioned conception, wherein this bridgt circuit is a full-bridge (full-bridge) circuit that is made of four diodes.
According to above-mentioned conception, wherein this power factor correction converter is coupled jointly by a relay that is electrically connected with this AC-input voltage, one second filter inductance, four diodes, two grid control its switch and two electric capacity and constitutes, and described grid control its switch has a reverse parallel connection diode respectively.
According to above-mentioned conception, when this AC-input voltage just often, this relay conducting, this power factor correction converter is changed this AC-input voltage to export a positive bus voltage and a negative bus voltage in turn jointly by this second filter inductance, two diodes, a grid control its switch and affiliated reverse parallel connection diode and an electric capacity respectively, constitutes this ac output voltage.
According to above-mentioned conception, when this AC-input voltage is unusual, this relay disconnects, and this power factor correction converter is changed this direct voltage to export a positive bus voltage and a negative bus voltage in turn jointly by a diode, a grid control its switch and affiliated reverse parallel connection diode and an electric capacity respectively.
According to above-mentioned conception, wherein this grid control its switch is a power MOSFET, and this reverse parallel connection diode is the parasitic reverse parallel connection diode of this power MOSFET.
Of the present invention another is contemplated that and proposes a kind of online uninterrupted power supply system, comprise the described conversion equipment with power factor correction and DC-DC conversion function of leading portion at least
Of the present inventionly one be contemplated that the How It Works that proposes a kind of online uninterrupted power supply system again, this online uninterrupted power supply system comprises at least in order to an electrical power storage feeding mechanism of a direct current voltage to be provided, one converter (inverter), one transformer, one rectifier filter and a power factor correction (PFC) transducer that is electrically connected to an AC-input voltage, it comprises two power switchs, described power switch is exchanging input frequency work with output AC voltage when unusual, the How It Works of this online uninterrupted power supply system comprises that step is as follows: (a) when this AC-input voltage just often, change this AC-input voltage by this power factor correction converter and export an ac output voltage; And (b) when this AC-input voltage is unusual, changes this direct voltage jointly by this converter, this transformer, this rectifier filter and this power factor correction converter and export this ac output voltage.
According to above-mentioned conception, wherein this step (a) comprises that also step is as follows: export a positive bus voltage and a negative bus voltage according to this AC-input voltage in turn with respect to the variation of sequential, to constitute this ac output voltage.
According to above-mentioned conception, wherein this step (b) comprises that also step is as follows: convert this direct voltage to a sine voltage, and export a positive bus voltage and a negative bus voltage in turn with respect to the variation of sequential according to this sine voltage, to constitute this ac output voltage
According to above-mentioned conception, wherein this step (b) comprises that also step is as follows: this power factor correction converter of pulse-width modulation, and export a positive bus voltage and a negative bus voltage in turn, to constitute this ac output voltage.
The present invention than the effect of prior art is: reduced the circuit unit that uses number, simplified circuit structure, utilize original power factor correction converter to realize the DC-DC conversion function of two voltage outputs simultaneously, not only but the power density of elevator system also can reduce manufacturing cost.
Description of drawings
Fig. 1: a kind of traditional conversion equipment with power factor correction and DC-DC conversion function;
Fig. 2: the present invention carries the circuit diagram of the conversion equipment with power factor correction and DC-DC conversion function;
The conversion equipment of Fig. 3: Fig. 2 is in the equivalent circuit diagram under the ray mode;
The conversion equipment of Fig. 4: Fig. 2 is in the equivalent circuit diagram under the non-firm power pattern;
The conversion equipment of Fig. 5: Fig. 4 is in the equivalent circuit diagram under the positive half period of low frequency output voltage;
The conversion equipment of Fig. 6: Fig. 4 is in the equivalent circuit diagram under the negative half-cycle of low frequency output voltage;
The circuit box schematic diagram of the conversion equipment of Fig. 7: Fig. 2;
The converter of Fig. 8: Fig. 7 uses another kind to recommend the circuit diagram of (push-pull) topology;
The converter of Fig. 9: Fig. 7 uses the circuit diagram of half-bridge (half-bridge) topology;
The converter of Figure 10: Fig. 7 uses the circuit diagram of a kind of full-bridge (full-bridge) topology;
The converter of Figure 11: Fig. 7 uses the circuit diagram of another kind of full-bridge topology;
The rectifier filter of Figure 12: Fig. 7 uses the circuit diagram of a kind of all-wave (full-wave) topology;
The rectifier filter of Figure 13: Fig. 7 uses the circuit diagram of another kind of all-wave topology;
The rectifier filter of Figure 14: Fig. 7 uses the doubly circuit diagram of stream (current double) topology; And
The rectifier filter of Figure 15: Fig. 7 uses a kind of circuit diagram of full-bridge topology.
Wherein, description of reference numerals is as follows:
10,20,70: conversion equipment;
30,73: power factor correction converter;
40: DC-to-DC converter;
71: converter;
72: rectifier filter;
80: push-pull circuit;
90: half-bridge circuit;
100,110,150: full-bridge circuit;
120,130: full-wave circuit;
140: times current circuit;
Vac: AC-input voltage;
J1: relay;
L, L1～L3: filter inductance;
C1, C2: filter capacitor;
Cin1, Cin2: parasitic capacitance;
D1～D12V: diode;
S1, S2, S3, S4: power MOSFET;
VBat: battery;
Tr: transformer;
BUS+: positive bus voltage;
BUS-: negative bus voltage.
Embodiment
The present invention represents circuit:
See also Fig. 2, it carries the representative graph of the conversion equipment with power factor correction and DC-DC conversion function for the present invention.Among the figure, conversion equipment 20 is by electrical power storage feeding mechanism VBat, by two grid control its switch S1, S2 and the affiliated converter that the reverse parallel connection diode constituted (inverter), transformer Tr, diode D1～D4 and the common formation of rectifier filter and power factor correction converter institute that filter inductance L1 constituted.Wherein, this power factor correction converter is made of jointly the relay J 1 that is electrically connected to AC-input voltage Vac, filter inductance L2, diode D5～D8, two grid control its switch S3, S4 and affiliated reverse parallel connection diode thereof and two capacitor C 1 and C2.
In addition, electrical power storage feeding mechanism VBat is in order to a direct current voltage to be provided.The input of this converter is electrically connected to electrical power storage feeding mechanism VBat, and output then is electrically connected to the primary side of transformer Tr, and the secondary side of transformer Tr is coupled to the bridgt circuit that diode D1～D4 is constituted.What deserves to be mentioned is that electrical power storage feeding mechanism VBat represents with battery that in an embodiment it also can be the electrical power storage feeding mechanism of tool identity functions such as storage battery certainly; And all grid control its switch of being mentioned among the embodiment all illustrate with a power MOSFET, and each reverse parallel connection diode can also be the parasitic reverse parallel connection diode of power MOSFET.
Below just the conversion equipment 20 of Fig. 2 explain respectively with line model and non-firm power pattern respectively.
(1) line model
AC-input voltage Vac in Fig. 2 just often, relay J 1 conducting, conversion equipment 20 is in ray mode.At this moment, power MOSFET S1 and S2 end, so the equivalent electric circuit of conversion equipment 20 is equivalent to power factor correction converter shown in Figure 3 30.
See also Fig. 3, it is in equivalent circuit diagram under the ray mode for the conversion equipment 20 of Fig. 2.As previously mentioned, the power factor correction converter among the figure 30 is made of filter inductance L2, rectifier diode D5 and D6, power MOSFET S3 and S4, fast recovery diode D7 and D8 and capacitor C 1 and C2.
When AC-input voltage Vac is timing, the boost power factor correcting converter output one positive bus voltage BUS+ of AC-input voltage Vac by being constituted by filter inductance L2, rectifier diode D5, power MOSFET S3, fast recovery diode D7 and capacitor C 1; And when AC-input voltage Vac when negative, AC-input voltage Vac exports a negative bus voltage BUS-by the boost power factor correcting converter that is made of filter inductance L2, rectifier diode D6, power MOSFET S4, fast recovery diode D8 and capacitor C 2.This positive and negative bus voltage that produces in turn according to sequential then forms an ac output voltage at the output of conversion equipment 20.
(2) non-firm power pattern
When the AC-input voltage Vac among Fig. 2 was unusual, relay J 1 disconnected, and conversion equipment 20 is in the non-firm power pattern.At this moment, power MOSFET S1 and S2 conducting, so the equivalent electric circuit of conversion equipment 20 is equivalent to DC-to-DC converter shown in Figure 4 40.
See also Fig. 4, it is in equivalent circuit diagram under the non-firm power pattern for the conversion equipment 20 of Fig. 2.As previously mentioned, the DC-to-DC converter among the figure 40 is made of power MOSFET S1 and S2, transformer Tr, fast recovery diode D1～D4, filter inductance L1, power MOSFET S3 and S4, fast recovery diode D7 and D8 and capacitor C 1 and C2.
Just on the whole, the conversion of this rectifier filter that the direct voltage process transformer Tr of battery VBat and D1～D4 and filter inductance L1 are constituted, positive bus voltage BUS+ that is exported and negative bus voltage BUS-voltage are exported a low-frequency sine voltage and are given load through the converter change of current.Microcosmic, at the positive half period of this low-frequency sine voltage, positive bus voltage BUS+ has power output, and negative bus voltage BUS-does not have power output; On the contrary, at the negative half-cycle of this low-frequency sine voltage, negative bus voltage BUS-has power output, and positive bus voltage BUS+ does not have power output.
The concrete course of work of DC-to-DC converter 40 is as follows:
(a) at the positive half period of low frequency output voltage, power MOSFET S1 and S2 work in the pulse-width modulation mode, S4 opens but S3 closes, so DC-to-DC converter 40 outputs one positive bus voltage BUS+, and the equivalent electric circuit of DC-to-DC converter 40 as shown in Figure 5 at this moment.
(b) at the negative half-cycle of low frequency output voltage, power MOSFET S1, S2 work in the pulse-width modulation mode, S3 opens but S4 closes, so DC-to-DC converter 40 outputs one negative bus voltage BUS-, and the equivalent electric circuit of DC-to-DC converter 40 as shown in Figure 6 at this moment.
Leading portion is described to be a kind of method of work of DC-to-DC converter 40; Under same circuit structure, DC-to-DC converter 40 also can take another kind of mode to carry out work: power MOSFET S1 and S2 work in the mode of fixed pulse width, by carrying out pulse-width modulation, to realize the output of positive bus voltage BUS+ and negative bus voltage BUS-at MOSFET S3 and S4.
Compare with traditional conversion equipment 10 of Fig. 1, conversion equipment 10 is in order to realize the DC-DC conversion function of two voltage outputs, therefore the secondary side at high frequency transformer Tr adopts two cover circuit, comprises two secondary side winding, two rectifier bridges (being made of D1～D8) and two filter inductance L1 and L2.Yet, the present invention is in order to realize the DC-DC conversion function of two voltage outputs, dark strand of secondary side at high frequency transformer Tr of its technical characterictic only adopts single secondary side winding, a rectifier bridge (being made of D1～D4) and a filter inductance, to produce a direct current voltage, and then, jointly this direct voltage is converted to two direct voltages by power MOSFET S3 and S4 and fast recovery diode D7 and D8 in the original power factor correction converter.
On behalf of other embodiment of circuit, the present invention change:
The conversion equipment that the front has power factor correction and a DC-DC conversion function to the present invention all is that the circuit with Fig. 2 is that example explains, and in fact, the conversion equipment 20 of Fig. 2 also can be considered as it as Fig. 7 by the mode of upperization.
See also Fig. 7, it is the circuit box schematic diagram of the conversion equipment 20 of Fig. 2.Wherein, whole conversion equipment 70 can be regarded as by converter 71, rectifier filter 72 and power factor correction converter 73 and be constituted; What deserves to be mentioned is that whether rectifier filter 72 comprises first filter inductance need be decided on the kind of converter.
Below explain at other variation of converter 71 and rectifier filter 72:
(i) converter 71 of Fig. 7 adopts a kind of recommending (push-pull) topological structure, the another kind of push-pull circuit 80 that Fig. 8 then can adopt for converter 71, be with the push-pull circuit difference of Fig. 7, be electrically connected an inductance L between the primary side of battery VBat and transformer Tr.
(ii) the converter 71 of Fig. 7 adopts the push-pull topology structure, if adopt half-bridge (half-bridge) topological structure of Fig. 9 to replace also can, wherein, half-bridge circuit 90 is coupled by two power MOSFET S1 and S2, its reverse parallel connection diode under respectively and two parasitic capacitance Cin1 and Cin2 to form.
(iii) the converter 71 of Fig. 7 adopts and recommends (push-pull) topological structure, if adopt full-bridge (full-bridge) topological structure of Figure 10 to replace also can, wherein, full-bridge circuit 100 be by four power MOSFETS 1～S4, its reverse parallel connection diode under is respectively coupled forms.
(iv) the converter 71 of Fig. 7 adopts and recommends (push-pull) topological structure, and the another kind of full-bridge circuit 110 that Figure 11 then can adopt for converter 71 has been to increase being electrically connected of inductance L with full-bridge circuit 100 differences of Figure 10.
(v) the rectifier filter 72 of Fig. 7 adopts full-bridge topologies, if adopt all-wave (full-wave) topological structure of Figure 12 also replace can, wherein, full-wave circuit 120 is made of two diode D1 and D2.
(vi) the rectifier filter 72 of Fig. 7 adopts full-bridge topologies, and the another kind of full-wave circuit 130 that Figure 13 then can adopt for rectifier filter 72 has been to increase being electrically connected of the first filter inductance L with full-wave circuit 120 differences of Figure 12.
(vii) the rectifier filter 72 of Fig. 7 adopts full-bridge topologies, if adopt doubly stream (current double) topological structure of Figure 14 also replace can, wherein, times current circuit 140 is coupled by two diode D1 and D2 and two filter inductance L1 and L2 and is formed.
(viii) the rectifier filter 72 of Fig. 7 adopts a kind of full-bridge topologies, and the another kind of full-bridge circuit 150 that Figure 15 then can adopt for rectifier filter 72 is to have taken away the first filter inductance L1 with the full-bridge circuit difference of Fig. 7.
Characteristics of the present invention:
In sum, the present invention is except providing a kind of conversion equipment with power factor correction and DC-DC conversion function, can also regard as provides a kind of online continuous electric work electric system and How It Works, has power factor correction and DC-DC conversion function simultaneously; With traditional conversion equipment by comparison, maximum characteristics be to reduce the circuit unit that uses number, simplified circuit structure, utilize original power factor correction converter to realize the DC-DC conversion function of two voltage outputs simultaneously, not only but the power density of elevator system also can reduce manufacturing cost.
The present invention must be thought and is to modify as all by person skilled in the art Shi Renshi craftsman, the scope of right neither disengaging claims institute desire protection.
Claims (10)
1. conversion equipment with power factor correction and DC-DC conversion function comprises:
One electrical power storage feeding mechanism is in order to provide a direct current voltage;
One converter, its input are electrically connected to this electrical power storage feeding mechanism;
One transformer, its primary side is electrically connected to the output of this converter;
One rectifier filter, its input is electrically connected to the secondary side of this transformer; And
One power factor correction converter, its input is electrically connected to an AC-input voltage, and this power factor correction converter also is coupled to the output of this rectifier filter;
When this AC-input voltage just often, this conversion equipment is changed this AC-input voltage by this power factor correction converter and is exported an ac output voltage, and when this AC-input voltage was unusual, this conversion equipment was changed this direct voltage jointly by this converter, this transformer, this rectifier filter and this power factor correction converter and is exported this ac output voltage.
2. the conversion equipment with power factor correction and DC-DC conversion function as claimed in claim 1 is characterized in that this electrical power storage feeding mechanism is a battery.
3. the conversion equipment with power factor correction and DC-DC conversion function as claimed in claim 1 is characterized in that:
The push-pull circuit of this converter for constituting by two grid control its switch, and described grid control its switch has a reverse parallel connection diode respectively; Or
The half-bridge circuit of this converter for constituting by two grid control its switch, and described grid control its switch has a reverse parallel connection diode and a parasitic capacitance respectively; Or
The full-bridge circuit of this converter for constituting by four grid control its switch, and described grid control its switch has a reverse parallel connection diode respectively; And
This grid control its switch is a power MOSFET, and this reverse parallel connection diode is the parasitic reverse parallel connection diode of this power MOSFET.
4. the conversion equipment with power factor correction and DC-DC conversion function as claimed in claim 1 is characterized in that this rectifier filter comprises a bridgt circuit at least, wherein:
This rectifier filter also comprises one first filter inductance that couples with this bridgt circuit; And
This bridgt circuit is:
A full-wave circuit that constitutes by two diodes; Or
The one times of current circuit that constitutes by two diodes; Or
A full-bridge circuit that constitutes by four diodes.
5. the conversion equipment with power factor correction and DC-DC conversion function as claimed in claim 1, it is characterized in that this power factor correction converter is coupled jointly by a relay that is electrically connected with this AC-input voltage, one second filter inductance, four diodes, two grid control its switch and two electric capacity constitutes, and described grid control its switch has a reverse parallel connection diode respectively, wherein:
When this AC-input voltage just often, this relay conducting, this power factor correction converter is changed this AC-input voltage jointly by this second filter inductance, two diodes, a grid control its switch and affiliated reverse parallel connection diode and an electric capacity respectively, to export a positive bus voltage and a negative bus voltage in turn, constitute this ac output voltage;
When this AC-input voltage is unusual, this relay disconnects, this power factor correction converter system changes this direct voltage jointly by a diode, a grid control its switch and affiliated reverse parallel connection diode and an electric capacity respectively, to export a positive bus voltage and a negative bus voltage in turn; And
This grid control its switch is a power MOSFET, and this reverse parallel connection diode is the parasitic reverse parallel connection diode of this power MOSFET.
6. an online uninterrupted power supply system comprises the described conversion equipment with power factor correction and DC-DC conversion function of claim 1 at least.
7. the How It Works of an online uninterrupted power supply system, this online uninterrupted power supply system comprises at least in order to an electrical power storage feeding mechanism, a converter, a transformer, rectifier filter that a direct current voltage is provided and the power factor correction converter that is electrically connected to an AC-input voltage, it comprises two power switchs, with the frequency work of output AC voltage, the How It Works of this online uninterrupted power supply system comprises that step is as follows to described power switch when the interchange input is unusual:
(a) when this AC-input voltage just often, change this AC-input voltage by this power factor correction converter and export an ac output voltage; And
(b) when this AC-input voltage is unusual, changes this direct voltage jointly by this converter, this transformer, this rectifier filter and this power factor correction converter and export this ac output voltage.
8. the How It Works of online uninterrupted power supply system as claimed in claim 7, it is characterized in that this step (a) comprises that also step is as follows: export a positive bus voltage and a negative bus voltage according to this AC-input voltage in turn with respect to the variation of sequential, to constitute this ac output voltage.
9. the How It Works of online uninterrupted power supply system as claimed in claim 7, it is characterized in that this step (b) comprises that also step is as follows: convert this direct voltage to a sine voltage, and export a positive bus voltage and a negative bus voltage in turn with respect to the variation of sequential according to this sine voltage, to constitute this ac output voltage.
10. the How It Works of online uninterrupted power supply system as claimed in claim 7, it is characterized in that this step (b) comprises that also step is as follows: this power factor correction converter of pulse-width modulation, and export a positive bus voltage and a negative bus voltage in turn, to constitute this ac output voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100657048A CN100379119C (en) | 2005-04-13 | 2005-04-13 | Conversion device with power factor correcting and DC-DC conversion function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100657048A CN100379119C (en) | 2005-04-13 | 2005-04-13 | Conversion device with power factor correcting and DC-DC conversion function |
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| CN1848599A CN1848599A (en) | 2006-10-18 |
| CN100379119C true CN100379119C (en) | 2008-04-02 |
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| CN104218809B (en) * | 2013-05-29 | 2019-01-22 | 伊顿制造（格拉斯哥）有限合伙莫尔日分支机构 | A kind of circuit device of integrated power factor correcting and DC-dc conversion |
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| CN1352482A (en) * | 2000-11-09 | 2002-06-05 | 台达电子工业股份有限公司 | DC/DC converting method and its converter |
| CN1363977A (en) * | 2002-02-01 | 2002-08-14 | 深圳安圣电气有限公司 | Power factor corrector for UPS |
| CN1592061A (en) * | 2003-09-01 | 2005-03-09 | 台达电子工业股份有限公司 | Push-pull converter and method for power supply device and uninterrupted power supply system |
-
2005
- 2005-04-13 CN CNB2005100657048A patent/CN100379119C/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996010861A1 (en) * | 1994-09-30 | 1996-04-11 | Grinaker Electronics Limited | Ac to dc converter |
| JPH08289540A (en) * | 1995-04-17 | 1996-11-01 | Sanken Electric Co Ltd | Switching power supply system |
| CN1352482A (en) * | 2000-11-09 | 2002-06-05 | 台达电子工业股份有限公司 | DC/DC converting method and its converter |
| CN1363977A (en) * | 2002-02-01 | 2002-08-14 | 深圳安圣电气有限公司 | Power factor corrector for UPS |
| CN1592061A (en) * | 2003-09-01 | 2005-03-09 | 台达电子工业股份有限公司 | Push-pull converter and method for power supply device and uninterrupted power supply system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1848599A (en) | 2006-10-18 |
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