CN205792229U - Large-power occasions high-power factor DC power supply in one - Google Patents

Large-power occasions high-power factor DC power supply in one Download PDF

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Publication number
CN205792229U
CN205792229U CN201620469757.XU CN201620469757U CN205792229U CN 205792229 U CN205792229 U CN 205792229U CN 201620469757 U CN201620469757 U CN 201620469757U CN 205792229 U CN205792229 U CN 205792229U
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CN
China
Prior art keywords
circuit
power
power factor
input
voltage
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CN201620469757.XU
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Chinese (zh)
Inventor
吴小丽
魏彦
王晓民
盖忠伟
雷元林
何锦坤
罗青青
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武汉杭久电气有限公司
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Priority to CN201620469757.XU priority Critical patent/CN205792229U/en
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Publication of CN205792229U publication Critical patent/CN205792229U/en

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    • Y02B70/126

Abstract

This utility model provides large-power occasions high-power factor DC power supply in one, including input rectifying filter circuit, circuit of power factor correction, Phaseshift controlling full-bridge circuit and detection control circuit.AC380V exchange input is through input rectifying filter circuit rectifying and wave-filtering, then carries out boosting inverter through circuit of power factor correction, Phaseshift controlling full-bridge circuit export galvanic current pressure;Detection control circuit output pulse width follows input voltage and pulse control signal 1 to the circuit of power factor correction of current phase difference change, makes AC input current waveform follow AC input voltage waveform change;Detection control circuit output pulse width follow feedback signal and external analog signal difference change four road pulse control signals to Phaseshift controlling full-bridge circuit so that VD follow external analog signal change.Experiment shows, the power factor of power supply described in the utility model is not less than 0.99.

Description

Large-power occasions high-power factor DC power supply in one

Technical field

This utility model belongs to power technique fields, is specifically related to large-power occasions high-power factor DC power supply in one.

Background technology

Along with the development of power semiconductor, Power Electronic Technique is developed rapidly.In various power electronic equipments, DC source occupies an important position, and the DC source with Switching Power Supply as representative is widely used in the fields such as communication, aviation, household electrical appliances, provides stable energy basis for all trades and professions.In for, large-power occasions, the main switch rectifying circuit using bridge-type uncontrollable rectifier and Large Copacity filter capacitor composition, in switching process, off and on, in spike shape, input current waveform is distorted input current, and power factor is relatively low.

The big I of power factor directly reflects the quality of power supply and electric energy loss situation, improves power factor and can improve utilization rate of electrical, reduce Harmonics of Input, reduces line loss.

Summary of the invention

In place of the purpose of this utility model is contemplated to overcome above-mentioned the deficiencies in the prior art, and provide large-power occasions high-power factor DC power supply in one.Its input voltage range is AC323V-437V, and under declared working condition, power factor reaches 0.99, and the total harmonic distortion rate of AC input current is less than or equal to 3%.

The purpose of this utility model is achieved by the following technical measures: large-power occasions high-power factor DC power supply in one, including input rectifying filter circuit, circuit of power factor correction, Phaseshift controlling full-bridge circuit and detection control circuit.AC380V exchange input is through input rectifying filter circuit rectifying and wave-filtering, then carries out boosting inverter through circuit of power factor correction, Phaseshift controlling full-bridge circuit export galvanic current pressure;Detection control circuit is according to the potential difference between the phase contrast between the voltage detection signal provided by input rectifying filter circuit and the current detection signal 1 provided by circuit of power factor correction and the voltage feedback signal 1 and the reference voltage that are provided by circuit of power factor correction, output pulse width follows described phase contrast and pulse control signal 1 to the circuit of power factor correction of potential difference change, makes AC input current waveform follow AC input voltage waveform change;Detection control circuit is according to the potential difference between the current detection signal 2 provided by Phaseshift controlling full-bridge circuit, voltage and current feedback signal, external analog signal, output pulse width follow described potential difference change four road pulse control signals to Phaseshift controlling full-bridge circuit so that VD follow external analog signal change.

In technique scheme, input rectifying filter circuit by inputting electric fuse, current-limiting resistance, relay, electromagnetic interface filter, single-phase rectification bridge, the element such as input filter capacitor composition.

In technique scheme, circuit of power factor correction is made up of Boost circuit, voltage detecting and current detecting.Force input current to follow AC-input voltage by current feedback to change, make input current waveform sine, and keep same phase with AC-input voltage, it is achieved PFC.

In technique scheme, Phaseshift controlling full-bridge circuit is constituted full-bridge converter by four power switch transistors, high frequency transformer and four Schottky barrier diodes, being isolated primary and secondary coil physically by high frequency transformer, input is not less than AC2500V with the isolation voltage of outlet chamber.

This utility model simple in construction, perfect in shape and function, compared with prior art have the advantage that

1) isolation voltage between exchange input and direct current output reaches AC2500V, improves the interference free performance of DC source.

2) total harmonic distortion rate of input current is less than or equal to 3%.

3), under declared working condition, power factor reaches 0.99.

4) application soft switch technique, power-efficient is more than 92%.

Accompanying drawing explanation

Fig. 1 is the integrated circuit theory diagram of a kind of middle large-power occasions high-power factor DC power supply of this utility model.

Fig. 2 is input rectifying filter circuit schematic diagram in this utility model embodiment.

Fig. 3 is circuit of power factor correction topological diagram in this utility model embodiment.

Fig. 4 is Phaseshift controlling full-bridge circuit topological diagram in this utility model embodiment.

Fig. 5 is detection control circuit theory diagram 1 in this utility model embodiment.

Fig. 6 is detection control circuit theory diagram 2 in this utility model embodiment.

Detailed description of the invention

The utility model will be further described below in conjunction with the accompanying drawings.

As it is shown in figure 1, large-power occasions high-power factor DC power supply in one, it includes input rectifying filter circuit, circuit of power factor correction, Phaseshift controlling full-bridge circuit and detection control circuit.AC380V exchange input is through input rectifying filter circuit rectifying and wave-filtering, then carries out boosting inverter through circuit of power factor correction, Phaseshift controlling full-bridge circuit export galvanic current pressure;Detection control circuit is according to the potential difference between the phase contrast between the voltage detection signal provided by input rectifying filter circuit and the current detection signal 1 provided by circuit of power factor correction and the voltage feedback signal 1 and the reference voltage that are provided by circuit of power factor correction, output pulse width follows described phase contrast and pulse control signal 1 to the circuit of power factor correction of potential difference change, makes AC input current waveform follow AC input voltage waveform change;Detection control circuit is according to the potential difference between the current detection signal 2 provided by Phaseshift controlling full-bridge circuit, voltage and current feedback signal, external analog signal, output pulse width follow described potential difference change four road pulse control signals to Phaseshift controlling full-bridge circuit so that VD follow external analog signal change.

As shown in Figure 2, described input rectifying filter circuit, the effect of current-limiting resistance R1 is when DC source starts, limit the charging current exporting storage capacitor C7~C10 in rear class circuit of power factor correction, prevent electric current excessive damage rectifier bridge D1, when the voltage exported on storage capacitor C7~C10 reaches setting value, relay K 1 action closes, and is excised by current-limiting resistance R1 short circuit.C1~C4, R2, R3, L1 constitute electromagnetic interface filter.The exchange of single-phase 380V inputs after electromagnetic interface filter, is obtained the sinusoidal half-wave voltage of 100Hz by rectifier bridge D1.

As it is shown on figure 3, described circuit of power factor correction, main circuit topology uses Boost circuit, is made up of power switch pipe Q2, diode D2, inductance L2 and output storage capacitor C7~C10.Power switch pipe Q2 turn on, diode D2 bear back-pressure cut-off, inductance L2 power on cleanliness increase, output storage capacitor C7~C10 be that output loading is powered;Q2 cut-off time, D2 forward conduction, inductance L2 power on cleanliness reduce, inductance L2 for output loading provide energy simultaneously to electric capacity C7~C10 charge.By controlling ON time and the deadline of Q2, electric current on inductance is made to follow the tracks of the rising of input voltage waveform, downward trend within a cycle, it is achieved the purpose of PFC.Voltage feedback signal 1 sends into detection control circuit, compares with reference voltage and makes output voltage stabilization;Voltage detection signal sends into detection control circuit, it is provided that a sinusoidal reference waveform makes current detection signal follow half-sinusoid change.

As shown in Figure 4, described Phaseshift controlling full-bridge circuit, it is made up of full bridge inverter, high frequency transformer T1, output rectifier and filter.It is four power switch pipes that full bridge inverter comprises Q3~Q6, and C25, C26, C33, C34 are resonant capacitances, and L5 is resonant inductance, and C32 is blocking capacitor, and T1 is high frequency transformer, and CT1 is pulse current transformer.D7, D8, D11, D12 are output rectifier tubes, L3 be output inductor, C27 be output filter capacitor, R64 is output current sampling resistor.

As it is shown in figure 5, described detection control circuit, its core controlling power factor circuit is average current control mode PWM controller UC3854A.UC3854A chip internal contains voltage error amplifier, current error amplifier, multiplier, Feed stocks device etc..Current error amplifier and peripheral resistance, electric capacity composition current inner loop, be responsible for controlling inductive current waveform sinusoidal tracking input voltage waveform;Voltage error amplifier and peripheral resistance, electric capacity composition outer voltage, be responsible for controlling stablizing of output voltage.Voltage feedback signal 1 compares with 3V reference voltage and exports a DC quantity after voltage error amplifier, the product of the voltage detection signal after this DC quantity and rectification is as inductive current specified rate, and inductive current specified rate compares with current detection signal 1 and exporting after current error amplifier generates pulse control signal 1 after Feed stocks device and control turning on and off of power switch pipe.

As shown in Figure 6, described detection control circuit, its core controlling Phaseshift controlling full-bridge circuit is phase-shift PWM controlled device UCC3895.UCC3895 chip internal is integrated with high frequency generator, sawtooth waveforms occurs and comparison circuit, error amplifier, overcurrent comparator, overcurrent and soft start logic circuit, adaptive dead zone regulation and four tunnels output delay control circuit etc..Error amplifier and peripheral resistance, electric capacity composition voltage, current double closed-loop, be responsible for controlling output voltage and follow external analog signal change.Voltage and current feedback signal compares with external analog signal and exports a DC quantity after error amplifier, and this DC quantity and sawtooth waveforms generate pwm pulse after comparing.Current detection signal 2 compares with 2.5V reference voltage and through overcurrent and soft start logic circuit, is controlled four tunnel pulse outputs, when fault, closes output pulse.Pwm pulse is transformed to differ the pulse control signal output of four tunnels complementations of a phase shifting angle by four tunnel output delay control circuits, is adjusted Dead Time by adaptive dead zone regulation circuit simultaneously.

In sum, every technical performance of a kind of middle large-power occasions high-power factor DC power supply of this utility model is as follows:

1, input voltage: single-phase AC 380V ± 15%;50Hz ± 5%

2, output voltage: DC 400V

3, output electric current: 8A

4, rated output power: 3200W

5, output voltage precision :≤± 1%

6, input power factor: >=0.99

7, input current total harmonic distortion rate :≤3% (full load)

8, work efficiency: >=92% (full load)

9, isolation voltage: exchange input and direct current outlet chamber 2500VAC

10, physical parameter: 180 × 300 × 80 (mm).

Claims (3)

1. a large-power occasions high-power factor DC power supply in, including input rectifying filtered electrical Road, circuit of power factor correction, Phaseshift controlling full-bridge circuit and detection control circuit;It is special Levy and be: AC380V exchange inputs through input rectifying filter circuit rectifying and wave-filtering, then through power factor Correcting circuit carries out boosting inverter, Phaseshift controlling full-bridge circuit export galvanic current pressure; Detection control circuit according to the voltage detection signal provided by input rectifying filter circuit and by power because of Count the phase contrast between the current detection signal 1 that correcting circuit provides and by PFC electricity Potential difference between voltage feedback signal 1 and reference voltage that road provides, output pulse width is followed described Phase contrast and pulse control signal 1 to the circuit of power factor correction of potential difference change, make exchange defeated Enter current waveform and follow AC input voltage waveform change;Detection control circuit is according to by Phaseshift controlling The current detection signal 2 of full-bridge circuit offer, voltage and current feedback signal, external analog Potential difference between signal, output pulse width follows four road pulse control signals of described potential difference change To Phaseshift controlling full-bridge circuit, so that VD follows external analog signal change.
Large-power occasions high-power factor DC power supply in one the most according to claim 1, It is characterized in that: input voltage range is AC323V-437V, and VD follows external analog Signal continuously adjustabe, output voltage range is DC0V-400V.
Large-power occasions high-power factor DC power supply in one the most according to claim 1, It is characterized in that: described Phaseshift controlling full-bridge circuit is become by four power switch transistors, high frequency Depressor and four Schottky barrier diodes constitute full-bridge converter, by high frequency transformer at physics On primary and secondary coil is isolated, input and the isolation voltage of outlet chamber are not less than AC2500V.
CN201620469757.XU 2016-05-21 2016-05-21 Large-power occasions high-power factor DC power supply in one CN205792229U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107070230A (en) * 2016-12-29 2017-08-18 上海嘉洲环保机电设备有限责任公司 A kind of three-phase 380V inputs High Power Factor high pressure purge supply unit peculiar to vessel
CN108020793A (en) * 2017-12-19 2018-05-11 湖南大学 Special power supply exports pulse-detecting circuit and special power supply dead electricity detection method
CN108886322A (en) * 2017-10-26 2018-11-23 深圳欣锐科技股份有限公司 The method and apparatus for improving switch power factor
CN109067196A (en) * 2018-07-02 2018-12-21 广东叠加能源科技有限责任公司 A kind of method for stabilizing voltage and device for power drives

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107070230A (en) * 2016-12-29 2017-08-18 上海嘉洲环保机电设备有限责任公司 A kind of three-phase 380V inputs High Power Factor high pressure purge supply unit peculiar to vessel
CN108886322A (en) * 2017-10-26 2018-11-23 深圳欣锐科技股份有限公司 The method and apparatus for improving switch power factor
WO2019080057A1 (en) * 2017-10-26 2019-05-02 深圳欣锐科技股份有限公司 Method and apparatus for improving power factor switching
CN108020793A (en) * 2017-12-19 2018-05-11 湖南大学 Special power supply exports pulse-detecting circuit and special power supply dead electricity detection method
CN109067196A (en) * 2018-07-02 2018-12-21 广东叠加能源科技有限责任公司 A kind of method for stabilizing voltage and device for power drives

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