CN102332837A - High-power-factor single-phase voltage-reducing rectification voltage-stabilizing circuit and method for controlling same - Google Patents
High-power-factor single-phase voltage-reducing rectification voltage-stabilizing circuit and method for controlling same Download PDFInfo
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- CN102332837A CN102332837A CN201110326036A CN201110326036A CN102332837A CN 102332837 A CN102332837 A CN 102332837A CN 201110326036 A CN201110326036 A CN 201110326036A CN 201110326036 A CN201110326036 A CN 201110326036A CN 102332837 A CN102332837 A CN 102332837A
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Abstract
The invention provides a high-power-factor single-phase voltage-reducing rectification voltage-stabilizing circuit and a method for controlling the same. The high-power-factor single-phase voltage-reducing rectification voltage-stabilizing circuit comprises a single-phase full-bridge rectification circuit, a fly-wheel diode, a switch, a filter inductor and a filter capacitor, wherein the single-phase full-bridge rectification circuit consists of four diodes; the fly-wheel diode and the filter capacitor are respectively connected to positive and negative lines of the single-phase full-bridge rectification circuit in parallel; and the switch and the filter inductor are distributed on the positive line or the negative line of the single-phase full-bridge rectification circuit. By adoption of the high-power-factor single-phase voltage-reducing rectification voltage-stabilizing circuit and the method for controlling the same, regardless of the change of an input voltage and a load, a network-side current fundamental wave and a network-side voltage fundamental wave are substantially in-phase. Compared with the conventional phase-control 600-V power supply cabinet product, a locomotive 600-V power supply cabinet product which adopts the circuit and the method provided by the invention has the advantages that: a network-side high-power factor is realized under the conditions of small change of the circuit and equal size, weight, cost and efficiency; line loss can be reduced; the capacity of transformers at all levels is reduced, and particularly, the size and weight of a vehicle-mounted main transformer are reduced; and the efficiency of the whole locomotive is improved.
Description
Technical field
The present invention relates to electric and electronic technical field, relate in particular to single-phase step-down rectifier voltage stabilizing circuit of a kind of High Power Factor and control method.
Background technology
Railway locomotive is transformed into single-phase 860V alternating current through transformer earlier from single-phase drawing electric network power taking, is transformed into stable direct current 600V through locomotive 600V powering shelf again and supplies power to passenger train, and output power is 2x400kW.
Locomotive 600V powering shelf generally adopts half control bridge phase control rectifier voltage stabilizing technique; Its basic circuit diagram is as shown in Figure 1; Typical voltage on line side current waveform under the high pressure full load conditions is as shown in Figure 2, and the typical voltage on line side current waveform under high pressure situation semi-load is as shown in Figure 3.It is thus clear that when higher or load was heavy at input voltage, the phase place of current on line side first-harmonic obviously lagged behind the phase place of voltage on line side first-harmonic, it is not high to cause netting the side power factor, and changes along with input voltage and load variations.This will influence the net side power factor of whole locomotive, increase line loss, strengthen the stage transformers capacity, especially strengthen volume, the weight of vehicle-mounted main transformer, and and then increase locomotive power consumption.In addition, can not initiatively turn-off because in a single day thyristor is just opened, the dynamic response of half control bridge phase control rectifier voltage stabilizing technique is poor.
For addressing this problem, the following mode of existing employing, as:
One, four quadrant convertor technology or PFC commutation technique, its circuit topology is shown in Fig. 4 a, Fig. 4 b.These two technology can both realize netting the side High Power Factor, even realize the current on line side sineization.Wherein the four-quadrant Semiconductor Converting Technology be railway locomotive master traction convertor and AuCT the technology that generally adopts.The PFC commutation technique is extensive in the small-power applications, and current-mode control is simple and reliable, combines to realize high frequencyization easily with soft switch technique.But with the technical merit of present semiconductor switch device, no matter adopt four-quadrant technology or PFC commutation technique, all can't be suitable with the phase control rectifier technology on volume, be difficult on railway locomotive, use.
Two, the technology of diode rectification+buck chopper, its circuit topology is as shown in Figure 5, after rectification He before the buck circuit, inductance, capacitor filter is arranged.This technological advantage is to realize netting the side High Power Factor, again can combine with soft switch technique and realize high frequencyization after effectively reduce the load side voltage fluctuation.But compare the phase control rectifier technology, owing to increased chopping depressuring circuit and corresponding filter circuit, weight will weigh a lot, also is difficult on railway locomotive, use.
Summary of the invention
The object of the present invention is to provide the single-phase step-down rectifier voltage stabilizing circuit of a kind of High Power Factor; To solve the low problem of phase control rectifier voltage stabilizing technique net side power factor; Simultaneously suitable with the phase control rectifier voltage stabilizing technique on volume, weight, efficient even cost, to adapt to railway locomotive the application requirements of direct current 600V is provided to train.
The objective of the invention is to realize through following technical scheme.
The single-phase step-down rectifier voltage stabilizing circuit of a kind of High Power Factor comprises: by four rectification circuits that diode VD1～the VD4 rectifier bridge constitutes, fly-wheel diode VD5, K switch 1, filter inductance L1 and filter capacitor C1; Said fly-wheel diode VD5 and filter capacitor C1 are connected in parallel on respectively on the positive and negative line of rectification circuit; Said K switch 1 and filter inductance L1 are distributed on the main track or negative wire of rectification circuit.
Preferably; The said first diode VD1 connects with the 3rd diode VD3; The said second diode VD2 back of connecting with the 4th diode VD4 is in parallel with the first diode VD1 and the 3rd diode VD3 series arm, said K switch 1 be connected on the negative wire of rectification circuit after filter inductance L1 connects.
Preferably; The said first diode VD1 connects with the 3rd diode VD3; The said second diode VD2 back of connecting with the 4th diode VD4 is in parallel with the first diode VD1 and the 3rd diode VD3 series arm, said K switch 1 be connected on the main track of rectification circuit after filter inductance L1 connects.
Preferably; The said first diode VD1 connects with the 3rd diode VD3; After connecting with the 4th diode VD4, the said second diode VD2 is in parallel with the first diode VD1 and the 3rd diode VD3 series arm; Said K switch 1 is connected on the negative wire of rectification circuit, and said filter inductance L1 is connected on the main track of rectification circuit.
Preferably; The said first diode VD1 connects with the 3rd diode VD3; After connecting with the 4th diode VD4, the said second diode VD2 is in parallel with the first diode VD1 and the 3rd diode VD3 series arm; Said K switch 1 is connected on the main track of rectification circuit, and said filter inductance L1 is connected on the negative wire of rectification circuit.
The single-phase step-down rectifier voltage stabilizing circuit of a kind of High Power Factor control method, this circuit comprises: the single-phase full bridge rectification circuit, fly-wheel diode, switch, filter inductance and the filter capacitor that are made up of four diodes; Fly-wheel diode and filter capacitor are connected in parallel on respectively on the positive and negative line of rectification circuit; Switch and filter inductance are distributed on the main track or negative wire of rectification circuit; When input voltage and load variations,, realize the adjusting of output dc voltage through the switch off time interval of adjustment switch.
Preferably, said switch is a semiconductor switch.
Preferably, said semiconductor switch is the IGBT switching tube.
Preferably, cut-offfing in every half period of switch is specially: switch is open-minded at moment t2, turn-offs at moment t4; Constantly the corresponding crest voltage with input single phase alternating current (A.C.) voltage first-harmonic of t3 constantly, t1 and t5 correspond respectively to the zero crossing moment of input single phase alternating current (A.C.) voltage first-harmonic, t1＜t2＜t3＜t4＜t5, and t2 and t4 are distributed in the t3 both sides.
Preferably, t2 and t4 are symmetrically distributed in the t3 both sides.
After adopting circuit of the present invention and control method, no matter how input voltage and load change, the current on line side first-harmonic all with the basic same-phase of voltage on line side first-harmonic.Adopt the locomotive 600V powering shelf product of circuit of the present invention and control method to compare with original phased 600V powering shelf product; Change not quite at circuit, under the suitable condition of volume, weight, cost, efficient, realized net side High Power Factor; Help reducing line loss; Reduce the stage transformers capacity, especially reduce volume, the weight of vehicle-mounted main transformer, and and then improve the efficient of whole locomotive.
Description of drawings
Fig. 1 is the basic circuit diagram of existing half control bridge phase control rectifier voltage stabilizing circuit;
Fig. 2 is the voltage on line side current waveform figure of existing half control bridge phase control rectifier voltage stabilizing circuit under the high pressure full load conditions;
Fig. 3 is the voltage on line side current waveform figure of existing half control bridge phase control rectifier voltage stabilizing circuit under high pressure situation semi-load;
Fig. 4 a is the circuit topology figure of four quadrant convertor;
Fig. 4 b is the circuit topology figure of PFC rectifier;
Fig. 5 is the circuit topology figure of the technology of diode rectification+buck chopper;
Fig. 6 is the single-phase step-down rectifier voltage stabilizing circuit of a High Power Factor of the present invention topological diagram;
Fig. 7 a and Fig. 7 b are the single-phase step-down rectifier voltage stabilizing circuit of High Power Factor of the present invention control method sketch mapes;
Fig. 8 is the voltage on line side current waveform figure of the single-phase step-down rectifier voltage stabilizing circuit of High Power Factor under the high pressure full load conditions;
Fig. 9 is the voltage on line side current waveform figure of the single-phase step-down rectifier voltage stabilizing circuit of High Power Factor under high pressure situation semi-load;
Figure 10 a-Figure 10 c is Fig. 6 circuit distortion topological diagram;
Figure 11 is the single-phase step-down rectifier voltage stabilizing circuit of a High Power Factor of the present invention embodiment schematic diagram.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
See also shown in Fig. 6,7a, the 7b, circuit comprises single-phase full bridge rectification circuit, fly-wheel diode VD5, semiconductor switch K1, filter inductance L1 and the filter capacitor C1 that is made up of diode VD1～VD4.Semiconductor switch K1, filter inductance L1 are positioned on the circuit main track.Semiconductor switch K1 is open-minded at moment t2, turn-offs at moment t4.Constantly the corresponding crest voltage with input single phase alternating current (A.C.) voltage first-harmonic of t3 constantly, t1 and t5 correspond respectively to the zero crossing moment of input single phase alternating current (A.C.) voltage first-harmonic, t1＜t2＜t3＜t4＜t5, and t2 and t4 roughly are symmetrically distributed in the t3 both sides.Control method at per half cycle of importing single phase alternating current (A.C.) voltage first-harmonic all is the same.Just can realize the adjusting of output dc voltage through the adjusting time interval (t4-t2).
Typical voltage on line side current waveform under the high pressure full load conditions is as shown in Figure 8, and the typical voltage on line side current waveform under high pressure situation semi-load is as shown in Figure 9; Visible by figure, no matter how input voltage and load change, the current on line side first-harmonic all with the basic same-phase of voltage on line side first-harmonic.Change not quite at circuit, under the suitable condition of volume, weight, cost, efficient, realized net side High Power Factor; Help reducing line loss; Reduce the stage transformers capacity, especially reduce volume, the weight of vehicle-mounted main transformer, and and then improve the efficient of whole locomotive.
Figure 10 a-Figure 10 c is Fig. 6 circuit distortion topological diagram, comprises the rectifier bridge, fly-wheel diode VD5, semiconductor switch K1, filter inductance L1 and the filter capacitor C1 that are made up of diode VD1～VD4.The difference of itself and Fig. 6 is that semiconductor switch K1, filter inductance L1 are positioned on the positive and negative line combination of interactions of the circuit mode.
On a locomotive, it is identical 2 the tunnel that main circuit shown in Figure 6 has, and powers to the load simultaneously under the normal condition, when 1 tunnel fault, excises this road output automatically, and another road power supply is unaffected.With set of circuits wherein is the example explanation, and shown in figure 11, circuit comprises the rectification circuit that is made up of diode rectifier bridge 1VD1,1VD2, fly-wheel diode 1VD3, semiconductor switch 1VT1 and 1VT2, filter inductance L1 and filter capacitor 1C3,1C4,1C5.1VD1,1VD2 adopt the maximum diode (led) module that allows repetitive peak reverse voltage 3300V; Each module comprises that two independent rated current are the diode of 1200A; 1VD3 adopts the maximum diode (led) module that allows repetitive peak reverse voltage 3300V, and each module comprises that two independent rated current are the diode of 1200A, and 1VT1,1VT2 are two specified average current 1200A; The maximum IGBT parallel connection that allows repetitive peak reverse voltage 3300V; L1 is the inductance of 9mH, and 1C3,1C4,1C5 adopt rated voltage 900VDC, and capacity is the electric capacity of 5700uF.Be numbered the IGBT of 1VT0 and electric capacity that code name is 1C1,1C2 and form active clamping circuir, be mainly used in the energy of absorption mesh side transformer leakage inductance and line inductance when the main IGBT shutoff that is numbered 1VT1 and 1VT2, prevent that IGBT from damaging because of overvoltage.The IGBT that is numbered 1VT1,1VT2 is open-minded at moment t2, turn-offs at moment t4.Constantly the corresponding crest voltage with input single phase alternating current (A.C.) voltage first-harmonic of t3 constantly, t1 and t5 correspond respectively to the zero crossing moment of input single phase alternating current (A.C.) voltage first-harmonic, t1＜t2＜t3＜t4＜t5, and t2 and t4 roughly are symmetrically distributed in the t3 both sides.Control method at per half cycle of importing single phase alternating current (A.C.) voltage first-harmonic all is the same.Just can realize the adjusting of output dc voltage through the adjusting time interval (t4-t2).
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the single-phase step-down rectifier voltage stabilizing circuit of High Power Factor is characterized in that, comprising: by four diodes (rectification circuit, fly-wheel diode (VD5), switch (K1), filter inductance (L1) and filter capacitor (C1) that the rectifier bridge of VD1～VD4) constitutes; Said fly-wheel diode (VD5) and filter capacitor (C1) are connected in parallel on respectively on the positive and negative line of rectification circuit; Said switch (K1) and filter inductance (L1) are distributed on the main track or negative wire of rectification circuit.
2. the single-phase step-down rectifier voltage stabilizing circuit of High Power Factor as claimed in claim 1; It is characterized in that; Said first diode (VD1) is connected with the 3rd diode (VD3); Said second diode (VD2) back of connecting with the 4th diode (VD4) is in parallel with first diode (VD1) and the 3rd diode (VD3) series arm, said switch (K1) be connected on the negative wire of rectification circuit after filter inductance (L1) is connected.
3. the single-phase step-down rectifier voltage stabilizing circuit of High Power Factor as claimed in claim 1; It is characterized in that; Said first diode (VD1) is connected with the 3rd diode (VD3); Said second diode (VD2) back of connecting with the 4th diode (VD4) is in parallel with first diode (VD1) and the 3rd diode (VD3) series arm, said switch (K1) be connected on the main track of rectification circuit after filter inductance (L1) is connected.
4. the single-phase step-down rectifier voltage stabilizing circuit of High Power Factor as claimed in claim 1; It is characterized in that; Said first diode (VD1) is connected with the 3rd diode (VD3); Be in parallel with first diode (VD1) and the 3rd diode (VD3) series arm after said second diode (VD2) is connected with the 4th diode (VD4), said switch (K1) is connected on the negative wire of rectification circuit, and said filter inductance (L1) is connected on the main track of rectification circuit.
5. the single-phase step-down rectifier voltage stabilizing circuit of High Power Factor as claimed in claim 1; It is characterized in that; Said first diode (VD1) is connected with the 3rd diode (VD3); Be in parallel with first diode (VD1) and the 3rd diode (VD3) series arm after said second diode (VD2) is connected with the 4th diode (VD4), said switch (K1) is connected on the main track of rectification circuit, and said filter inductance (L1) is connected on the negative wire of rectification circuit.
6. the single-phase step-down rectifier voltage stabilizing circuit of High Power Factor control method is characterized in that this circuit comprises: the single-phase full bridge rectification circuit, fly-wheel diode, switch, filter inductance and the filter capacitor that are made up of four diodes; Fly-wheel diode and filter capacitor are connected in parallel on respectively on the positive and negative line of rectification circuit; Switch and filter inductance are distributed on the main track or negative wire of rectification circuit; When input voltage and load variations,, realize the adjusting of output dc voltage through the switch off time interval of adjustment switch.
7. the single-phase step-down rectifier voltage stabilizing circuit of High Power Factor as claimed in claim 6 control method is characterized in that said switch is a semiconductor switch.
8. the single-phase step-down rectifier voltage stabilizing circuit of High Power Factor as claimed in claim 7 control method is characterized in that said semiconductor switch is the IGBT switching tube.
9. the single-phase step-down rectifier voltage stabilizing circuit of High Power Factor as claimed in claim 6 control method is characterized in that cut-offfing in every half period of switch is specially: switch is open-minded at moment t2, turn-offs at moment t4; Constantly the corresponding crest voltage with input single phase alternating current (A.C.) voltage first-harmonic of t3 constantly, t1 and t5 correspond respectively to the zero crossing moment of input single phase alternating current (A.C.) voltage first-harmonic, t1＜t2＜t3＜t4＜t5, and t2 and t4 are distributed in the t3 both sides.Control method at per half cycle of importing single phase alternating current (A.C.) voltage first-harmonic all is the same.
10. the single-phase step-down rectifier voltage stabilizing circuit of High Power Factor as claimed in claim 9 control method is characterized in that t2 and t4 are symmetrically distributed in the t3 both sides.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102723880A (en) * | 2012-06-13 | 2012-10-10 | 广州金升阳科技有限公司 | Alternating current-to-direct current circuit |
| CN103956903A (en) * | 2014-04-25 | 2014-07-30 | 东南大学 | LC parallel resonance voltage reduction DC/DC converter and control method thereof |
| EP3793078A4 (en) * | 2018-05-10 | 2022-01-19 | Kabushiki Kaisha Toshiba | Dc power transformation system |
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| US20070236968A1 (en) * | 2006-04-07 | 2007-10-11 | Delta Electronics, Inc. | Power supply with ripple attenuator |
| CN101777770A (en) * | 2010-02-12 | 2010-07-14 | 浙江大学 | Control circuit for voltage dropping type power factor corrector |
| CN101860230A (en) * | 2010-04-01 | 2010-10-13 | 重庆大学 | A Novel AC-DC-AC Converter and Its Control Method |
| CN102044958A (en) * | 2009-10-23 | 2011-05-04 | 台达电子工业股份有限公司 | Buck and boost PFC circuit system with auxiliary circuit and method thereof |
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2011
- 2011-10-24 CN CN201110326036A patent/CN102332837A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20070236968A1 (en) * | 2006-04-07 | 2007-10-11 | Delta Electronics, Inc. | Power supply with ripple attenuator |
| CN102044958A (en) * | 2009-10-23 | 2011-05-04 | 台达电子工业股份有限公司 | Buck and boost PFC circuit system with auxiliary circuit and method thereof |
| CN101777770A (en) * | 2010-02-12 | 2010-07-14 | 浙江大学 | Control circuit for voltage dropping type power factor corrector |
| CN101860230A (en) * | 2010-04-01 | 2010-10-13 | 重庆大学 | A Novel AC-DC-AC Converter and Its Control Method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723880A (en) * | 2012-06-13 | 2012-10-10 | 广州金升阳科技有限公司 | Alternating current-to-direct current circuit |
| CN103956903A (en) * | 2014-04-25 | 2014-07-30 | 东南大学 | LC parallel resonance voltage reduction DC/DC converter and control method thereof |
| EP3793078A4 (en) * | 2018-05-10 | 2022-01-19 | Kabushiki Kaisha Toshiba | Dc power transformation system |
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Inventor after: Zhao Linchong Inventor after: Yang Dongli Inventor after: Wang Fengwu Inventor before: Zhao Hangfei Inventor before: Yang Dongli Inventor before: Wang Fengwu |
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Free format text: CORRECT: INVENTOR; FROM: ZHAO HANGFEI YANG DONGLI WANG FENGWU TO: ZHAO LINCHONG YANG DONGLI WANG FENGWU |
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Application publication date: 20120125 |