CN205212701U - Two boost of Z type do not have bridge PFC converter - Google Patents
Two boost of Z type do not have bridge PFC converter Download PDFInfo
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- CN205212701U CN205212701U CN201521078068.8U CN201521078068U CN205212701U CN 205212701 U CN205212701 U CN 205212701U CN 201521078068 U CN201521078068 U CN 201521078068U CN 205212701 U CN205212701 U CN 205212701U
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract
The utility model discloses a two boost of Z type do not have bridge PFC converter, do not take anti -parallel diode's IGBT, four diodes and an electric capacity including two inductance, two, one end and the one end in input alternating voltage source, the 2nd IGBT's projecting pole, the negative pole of third diode of first inductance are connected, and the other end of first inductance and the positive pole of a IGBT's collecting electrode, first diode are connected, one end and the other end in input alternating voltage source, a IGBT's projecting pole, the negative pole of fourth diode of second inductance are connected, and the other end of second inductance is connected with the anodal of the 2nd IGBT's collecting electrode, second diode, the anodal of electric capacity is connected with the negative pole of first diode, the negative pole of second diode, the one end of load, and the negative pole of electric capacity is connected with the positive pole of the positive pole of third diode, fourth diode, the other end of load. The utility model discloses the circuit loss is low, and is efficient, can realize exchanging the side power factor of unit.
Description
Technical field
The utility model relates to AC/DC and converts field, particularly relates to the two boost Bridgeless power factor circuit correcting circuit of a kind of Z-type.
Background technology
Use bridge-type uncontrollable rectifier a large amount of at present not only causes serious harmonic pollution to electrical network, and the waste that also result in electric energy on the low side of AC side Power Factor.Power factor correction technology can realize ac-side current and follow the tracks of AC voltage, can improve the power factor of AC.
Traditional single phase boost pfc circuit causes that system loss is large, efficiency of transmission is low due to the existence of rectifier bridge.In order to improve conversion efficiency, PFC develops into non-bridge PFC from traditional bridge PFC that has.Generally there are two switching devices in induction charging loop in general bridgeless Boost pfc circuit, cause unnecessary loss.
In order to solve the above problems, the utility model proposes the two boost non-bridge PFC converter of a kind of Z-type.
Utility model content
The problem such as large for the loss of existing BoostPFC inverter power, efficiency is on the low side, the purpose of this utility model is the two boost non-bridge PFC converter of the simple Z-type of a kind of structure, can reduce circuit loss, improve conversion efficiency.
In order to reach the above object, the utility model adopts following technical scheme.
The two boost non-bridge PFC converter of a kind of Z-type, be made up of two inductance, two IGBT not with anti-paralleled diode, four diodes, electric capacity: one end of described first inductance is connected with the one end in input ac voltage source, the emitter of the 2nd IGBT, the negative pole of the 3rd diode respectively, and the other end of the first inductance is connected with the collector electrode of an IGBT, the positive pole of the first diode respectively; One end of described second inductance is connected with the other end in input ac voltage source, the emitter of an IGBT, the negative pole of the 4th diode respectively, and the other end of the second inductance is connected with the collector electrode of the 2nd IGBT, the positive pole of the second diode respectively; The positive pole of described electric capacity is connected with the negative pole of the first diode, the negative pole of the second diode, one end of load respectively, and the negative pole of electric capacity is connected with the positive pole of the 3rd diode, the positive pole of the 4th diode, the other end of load respectively.
When input ac voltage source is at positive half cycle, between the collector and emitter of an IGBT, bear forward voltage, controlled its turn-on and turn-off by given signal, bear reverse voltage between the collector and emitter of the 2nd IGBT and turn off; When being operated in positive half period, alternating-current voltage source, the first inductance, an IGBT, the first diode, electric capacity, the 4th diode form a Boost circuit jointly.
When input ac voltage source is at negative half period, between the collector and emitter of the 2nd IGBT, bear forward voltage, controlled its turn-on and turn-off by given signal, bear reverse voltage between the collector and emitter of an IGBT and turn off; When being operated in negative half-cycle, alternating-current voltage source, the second inductance, the 2nd IGBT, the second diode, electric capacity, the 3rd diode form another Boost circuit jointly.
Above-mentioned electric capacity can ensure enough greatly the voltage stabilization at electric capacity two ends, and the output dc voltage at load two ends equals the voltage at electric capacity two ends.
Compared with prior art, the utility model tool has the following advantages and technique effect:
1, structure and principle simple
The utility model adopts two IGBT(S1-S2 not with anti-paralleled diode) be operated in the positive-negative half-cycle of input ac power respectively, each half cycle can be considered as a Boost circuit, structure and principle simple, easily control.
2, loss is low
The utility model adopts the IGBT not with anti-paralleled diode, only has a switch device conductive, reduce device loss further in the induction charging loop of power supply positive-negative half-cycle.
3, overall efficiency is high
The utility model, compared with traditional BoostPFC converter, eliminates rectifier bridge, and reduce the loss that rectifier bridge brings, overall efficiency is improved.
Accompanying drawing explanation
Fig. 1 is the two boost non-bridge PFC transformer configuration figure of a kind of Z-type of the present utility model;
Fig. 2 a, Fig. 2 b are the operating diagram of circuit shown in Fig. 1 when the one IGBTS1 turns on and off when the positive half cycle of input voltage vin respectively;
Fig. 3 a, Fig. 3 b are the operating diagram of circuit shown in Fig. 1 when the 2nd IGBTS2 turns on and off when input voltage vin negative half period respectively;
Fig. 4 is the oscillogram that emulation obtains AC input ac voltage and electric current;
Fig. 5 is the oscillogram that emulation obtains DC side output dc voltage.
Embodiment
Below in conjunction with embodiment and accompanying drawing, explanation is described in further detail to the utility model, but execution mode of the present utility model is not limited thereto.If have process or the parameter of not special detailed description it is noted that following, be all that those skilled in the art can refer to existing techniques in realizing.
As shown in Figure 1, the two boost non-bridge PFC converter of a kind of Z-type, be made up of two inductance (L1-L2), two IGBT (S1-S2) not with anti-paralleled diode, four diodes (D1-D4), electric capacity C: one end of described first inductance L 1 is connected with one end of input ac voltage source Vin, the emitter of the 2nd IGBTS2, the negative pole of the 3rd diode D3 respectively, and the other end of the first inductance L 1 is connected with the collector electrode of an IGBTS1, the positive pole of the first diode D1 respectively; One end of described second inductance L 2 is connected with the other end of input ac voltage source Vin, the emitter of an IGBTS1, the negative pole of the 4th diode D4 respectively, and the other end of the second inductance L 2 is connected with the collector electrode of the 2nd IGBTS2, the positive pole of the second diode D2 respectively; The positive pole of described electric capacity C is connected with the negative pole of the first diode D1, the negative pole of the second diode D2, one end of load R respectively, and the negative pole of electric capacity C is connected with the positive pole of the 3rd diode D3, the positive pole of the 4th diode D4, the other end of load R respectively.
As Fig. 2 a ~ 2b, when input ac voltage source Vin is at positive half cycle, bear forward voltage between the collector and emitter of the one IGBTS1, controlled its turn-on and turn-off by given signal, bear reverse voltage between the collector and emitter of the 2nd IGBTS2 and turn off; When being operated in positive half period, alternating-current voltage source Vin, the first inductance L 1, an IGBTS1, the first diode D1, electric capacity C, the 4th diode D4 form a Boost circuit jointly.When control the one IGBTS1 conducting, input ac voltage source Vin carries out charging energy-storing to the first inductance L 1, and electric capacity C discharges to load R.When control the one IGBTS1 turns off, input ac voltage source Vin, the first inductance L 1, first diode D1, the 4th diode D4, electric capacity C and load R form path, and now alternating-current voltage source Vin and the first inductance L 1 carry out charging to electric capacity C and load R powers.According to the turn-on and turn-off time of requirement adjustment the one IGBTS1 of output dc voltage U0.
As Fig. 3 a ~ 3b, when input ac voltage source Vin is at negative half period, bear forward voltage between the collector and emitter of the 2nd IGBTS2, controlled its turn-on and turn-off by given signal, bear reverse voltage between the collector and emitter of an IGBTS1 and turn off; When being operated in negative half-cycle, alternating-current voltage source Vin, the second inductance L 2, the 2nd IGBTS2, the second diode D2, electric capacity C, the 3rd diode D3 form another Boost circuit jointly.When control the 2nd IGBTS2 conducting, input ac voltage source Vin carries out charging energy-storing to the second inductance L 2, and electric capacity C discharges to load R.When control the 2nd IGBTS2 turns off, input ac voltage source Vin, the second inductance L 2, second diode D2, the 3rd diode D3, electric capacity C and load R form path, and now alternating-current voltage source Vin and the second inductance L 2 carry out charging to electric capacity C and load R powers.According to the turn-on and turn-off time of requirement adjustment the 2nd IGBT pipe S2 of output dc voltage U0.
As Fig. 4, experiment parameter is: input ac power Vin=220V/50HZ, inductance L 1=L2=3mH, power output Pout=1kW, electric capacity C=1000 μ F, and output voltage Uo=400V, IGBT switching frequency fs=50HZ, IGBT selects the FGW40N120H of Infineon.Experimental verification the utility model AC input current follows the tracks of input voltage, and can realize unity power factor and run, current harmonics is little.
As Fig. 5, under same experiment parameter, obtain electric capacity C two ends direct voltage Uo and stablize, ripple is little.
Those skilled in the art can make various amendment to this specific embodiment or supplement or adopt similar mode to substitute under the prerequisite without prejudice to principle of the present utility model and essence, but these changes all fall into protection range of the present utility model.Therefore the utility model technical scope is not limited to above-described embodiment.
Claims (1)
1. the two boost non-bridge PFC converter of Z-type, is characterized in that comprising two inductance (L1-L2), two IGBT (S1-S2) not with anti-paralleled diode, four diodes (D1-D4) and electric capacity (C); One end of described first inductance (L1) is connected with one end of input ac voltage source (Vin), the emitter of the 2nd IGBT (S2), the negative pole of the 3rd diode (D3) respectively, and the other end of the first inductance (L1) is connected with the collector electrode of an IGBT (S1), the positive pole of the first diode (D1) respectively; One end of described second inductance (L2) is connected with the other end of input ac voltage source (Vin), the emitter of an IGBT (S1), the negative pole of the 4th diode (D4) respectively, and the other end of the second inductance (L2) is connected with the collector electrode of the 2nd IGBT (S2), the positive pole of the second diode (D2) respectively; The positive pole of described electric capacity (C) is connected with the negative pole of the first diode (D1), the negative pole of the second diode (D2), one end of load (R) respectively, and the negative pole of electric capacity (C) is connected with the positive pole of the 3rd diode (D3), the positive pole of the 4th diode (D4), the other end of load (R) respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521078068.8U CN205212701U (en) | 2015-12-20 | 2015-12-20 | Two boost of Z type do not have bridge PFC converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521078068.8U CN205212701U (en) | 2015-12-20 | 2015-12-20 | Two boost of Z type do not have bridge PFC converter |
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| CN205212701U true CN205212701U (en) | 2016-05-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105450014A (en) * | 2015-12-20 | 2016-03-30 | 华南理工大学 | Z-type dual-boost bridgeless PFC (Power Factor Correction) converter |
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2015
- 2015-12-20 CN CN201521078068.8U patent/CN205212701U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105450014A (en) * | 2015-12-20 | 2016-03-30 | 华南理工大学 | Z-type dual-boost bridgeless PFC (Power Factor Correction) converter |
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