CN115347804B - IGBT three-discrete staggered PFC type power supply device and control method thereof - Google Patents

IGBT three-discrete staggered PFC type power supply device and control method thereof Download PDF

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Publication number
CN115347804B
CN115347804B CN202211286625.XA CN202211286625A CN115347804B CN 115347804 B CN115347804 B CN 115347804B CN 202211286625 A CN202211286625 A CN 202211286625A CN 115347804 B CN115347804 B CN 115347804B
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electrically connected
input
power supply
output
unit
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CN115347804A (en
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刘震
黄大强
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Shenzhen Autoway Power Technology Co ltd
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Shenzhen Autoway Power Technology Co ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0012—Control circuits using digital or numerical techniques
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/10—Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from ac or dc
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/14—Arrangements for reducing ripples from dc input or output
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H02M1/4216—Arrangements for improving power factor of AC input operating from a three-phase input voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/157—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators with digital control
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M7/2173—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a biphase or polyphase circuit arrangement
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M7/2176—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only comprising a passive stage to generate a rectified sinusoidal voltage and a controlled switching element in series between such stage and the output
    • 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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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The invention discloses an IGBT three-discrete staggered PFC type power supply device and a control method thereof, and the device comprises a central processor, a three-phase full-wave rectification module and three discrete staggered PFC booster circuits, wherein the three-phase full-wave rectification module comprises three rectification units, the input ends of the three rectification units are respectively and correspondingly electrically connected with three-phase alternating current mains supply, the output ends of the three rectification units are respectively and correspondingly electrically connected with the three discrete staggered PFC booster circuits, the three discrete staggered PFC booster circuits are respectively and electrically connected with the central processor, and the input ends of the three discrete staggered PFC booster circuits are also respectively and electrically connected with an external direct current power supply. According to the invention, three rectifying units and three discrete staggered PFC booster circuits are arranged, so that a three-phase alternating-current power supply can be split into three single-phase alternating-current power supplies, the three single-phase alternating-current power supplies are subjected to PWM (pulse width modulation) independently, and the three single-phase alternating-current power supplies are filtered by the booster inductor and the filter capacitor and then output into low-ripple high-power stable direct-current voltage.

Description

IGBT three-discrete staggered PFC type power supply device and control method thereof
Technical Field
The invention relates to the field of power supply circuits, in particular to an IGBT three-discrete staggered PFC type power supply device and a control method thereof.
Background
The DC power supply device is mainly used for providing one or more groups of constant DC outputs for the load, and the constant DC outputs can meet the working conditions of the load. The direct current output by the direct current power supply device adopting diode rectification has larger power frequency ripple waves; the dc power supply device may be a switching power supply using power electronics, and the dc output of the switching power supply device often contains high-frequency ripples.
In the traditional direct current power supply device, the rectification mode is that an alternating current power supply is rectified by a diode and then outputs direct current with ripples through a filter capacitor, and the direct current has the defects of large current ripples, large noise, low power factor, large size (filter capacitor), incapability of adjusting the voltage of an output power supply and particularly obvious heavy load condition.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an IGBT three-discrete staggered PFC type power supply device and a control method thereof.
The purpose of the invention is realized by the following technical scheme:
an IGBT three-discrete interleaved PFC-type power supply device, comprising: the three-phase full-wave rectification module comprises three rectification units, the input ends of the three rectification units are respectively and correspondingly electrically connected with a three-phase alternating current commercial power, the output ends of the three rectification units are respectively and correspondingly electrically connected with the three discrete staggered PFC booster circuits, the three discrete staggered PFC booster circuits are respectively and electrically connected with the central processor, and the input ends of the three discrete staggered PFC booster circuits are also respectively and electrically connected with an external direct current power supply;
in one discrete interleaved PFC BOOST circuit, the discrete interleaved PFC BOOST circuit includes an input detection module, an interleaved PFC-DC BOOST module, an output detection module, and a discrete interleaved PFC-BOOST main control unit, an input end of the input detection module is electrically connected to one of the rectification unit and the DC power supply, an output end of the input detection module is electrically connected to the interleaved PFC-DC BOOST module, an output end of the interleaved PFC-DC BOOST module is electrically connected to the output detection module, an output end of the output detection module outputs a DC voltage, and the discrete interleaved PFC-BOOST main control unit is electrically connected to the input detection module, the interleaved PFC-DC BOOST module, the output detection module, and the central processor, respectively.
In one embodiment, the input detection module includes a DC input unit and a waveform detection unit, an input end of the DC input unit is electrically connected to the rectifying unit and the DC power supply, an output end of the DC input unit is electrically connected to the waveform detection unit, an output end of the waveform detection unit is electrically connected to the interleaved PFC-DC BOOST module, and the DC input unit and the waveform detection unit are further electrically connected to the discrete interleaved PFC-BOOST main control unit.
In one embodiment, the output detection module includes a voltage detection unit and a current detection sensor, an input end of the voltage detection unit is electrically connected to an output end of the interleaved PFC-DC BOOST module, an output end of the voltage detection unit is electrically connected to the current detection sensor, and the voltage detection unit and the current detection sensor are further electrically connected to the discrete interleaved PFC-BOOST main control unit, respectively.
In one embodiment, the output detection module further includes an output channel unit, an input end of the output channel unit is electrically connected to an output end of the current detection sensor, an output end of the output channel unit outputs a dc voltage, and the output channel unit is further electrically connected to the discrete interleaved PFC-BOOST main control unit.
In one embodiment, the rectifying unit includes four sequentially connected rectifying diodes.
In one embodiment, the dc input unit includes a diode D10 and a switch K10, an anode of the diode D10 is used for being electrically connected to a dc power supply, a cathode of the diode D10 is electrically connected to the switch K10, and the switch K10 is further electrically connected to the waveform detection unit.
In one embodiment, the waveform detection unit includes a resistor R20 and a resistor R32, one end of the resistor R20 is electrically connected to the dc input unit, the other end of the resistor R20 is electrically connected to the resistor R32 and the discrete interleaved PFC-BOOST main control unit, respectively, and the other end of the resistor R32 is grounded.
In one embodiment, the voltage detection unit includes a resistor R29 and a resistor R36, one end of the resistor R29 is electrically connected to the output end of the interleaved PFC-DC BOOST module, the other end of the resistor R29 is electrically connected to the resistor R36 and the discrete interleaved PFC-BOOST main control unit, respectively, and the other end of the resistor R36 is grounded.
In one embodiment, the output channel unit includes a diode D6 and a capacitor C14, an anode of the diode D6 is electrically connected to the current detection sensor, a cathode of the diode D6 is electrically connected to the capacitor C14, and the cathode of the diode D6 is further used for outputting a dc voltage.
The invention also provides a control method of the IGBT three-discrete staggered PFC type power supply device, which comprises the following steps:
when the alternating current mains supply input state is in the state that:
splitting a three-phase alternating current commercial power into three single-phase line voltages, respectively and correspondingly performing full-wave rectification through a rectification unit, and respectively inputting the three single-phase line voltages into corresponding input detection modules;
each input detection module detects a voltage peak and a voltage trough of an input power supply and inputs the voltage peak and the voltage trough into the interleaved PFC-DC boost module;
after each interleaved PFC-DC boosting module respectively and correspondingly carries out PWM pulse width modulation on three-phase waveform voltage, a high-voltage direct-current power supply is output through overvoltage detection, overcurrent detection and non-return of an output detection module;
when in the direct current power supply input state:
after the direct current power supply is subjected to voltage division by the input detection module, the direct current power supply is input to the interleaved PFC-DC boosting module, and the central processor controls the interleaved PFC-DC boosting module to be converted into a BOOST mode;
the interleaved PFC-DC boosting module boosts the direct-current power supply and outputs the boosted direct-current power supply to the output detection module;
the output detection module outputs the high-voltage direct-current power supply after performing overvoltage detection, overcurrent detection and non-return on the boosted direct-current voltage.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the invention relates to an IGBT three-discrete staggered PFC type power supply device, which is characterized in that three rectifying units and three discrete staggered PFC booster circuits are arranged, a three-phase alternating-current power supply can be split into three single-phase alternating-current power supplies, the three single-phase alternating-current power supplies are subjected to PWM pulse width modulation independently, and the three single-phase alternating-current power supplies are filtered by a booster inductor and a filter capacitor to be output into low-ripple high-power stable direct-current voltage.
2. Compared with the traditional rectification mode, the IGBT three-discrete staggered PFC type power supply device provided by the invention has the advantages that a huge electrolytic capacitor filtering is not needed, the problem caused by the volume is reduced, the ripple wave caused by insufficient trough voltage is filled up by a PWM (pulse width modulation) mode, the output filter capacitor can be very small due to high frequency, and the nonpolar capacitor replaces the electrolytic capacitor with the service life, so that the size of the filter capacitor structure is about 2/3 smaller than that of the capacitor structure of the traditional rectification mode.
3. The IGBT three-discrete staggered PFC type power supply device adopts a three-discrete structure, if a phase failure occurs, a power unit with the phase failure can be controlled to stop a PWM unit, the PWM mode is converted into a traditional rectification mode, and the other one phase power unit bears all power output and reduces the power output to 1/3 of the original power, at the moment, the power factor of a power line is unchanged, and the phase failure is converted into derating use.
4. The IGBT three-discrete staggered PFC type power supply device can be not limited by a power supply, can input alternating current and direct current, can be converted into a BOOST boosting mode to achieve the aim of stabilizing input voltage when the direct current is input, and can perform PWM pulse width modulation to stabilize the output voltage when the alternating current voltage is input or the input voltage is unstable so as to input a stable direct current power supply to a later stage.
Drawings
Fig. 1 is a block diagram of an IGBT three-discrete interleaved PFC type power supply apparatus according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a discrete interleaved PFC boost circuit;
fig. 3 is a waveform diagram of an ac mains input;
fig. 4 is a graph of the voltage waveform detected by the PFC chip U3;
FIG. 5 is a graph of a resultant current waveform at input;
FIG. 6 is an exploded current waveform diagram at input;
fig. 7 is a waveform diagram of three demodulation waveforms detected by the PFC chip U3 for multiple cycles;
fig. 8 is a waveform diagram of three-demodulation modulation of a single cycle detected by the PFC chip U3;
fig. 9 is a diagram of IGBT driving waveforms sent by the PFC chip U3 to the group AB;
FIG. 10 is a graph of group A output voltage waveforms;
FIG. 11 is a diagram of a DC power input waveform;
FIG. 12 shows an interleaved drive waveform when DC power is input;
fig. 13 is a circuit diagram of an IGBT three-discrete interleaved PFC power supply device according to an embodiment of the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
The direct current part is a first-level direct current part of the direct current quick charging pile of the new energy automobile, but the traditional rectification mode is changed, the traditional rectification mode is only to output direct current with ripples through a filter capacitor after an alternating current power supply is rectified by a diode, and the direct current has the defects of large current ripples, large noise, low power grid utilization rate, low power factor, large size (filter capacitor), incapability of adjusting the voltage of the output power supply and particularly obvious heavy load condition. The invention provides an IGBT three-discrete interleaved PFC type power supply device and a control method for solving the problems, wherein the IGBT three-discrete interleaved PFC type power supply device is a first-stage non-isolated direct current part of a direct current fast charging pile, and is used for providing a stable direct current power supply for an isolated charger.
In an embodiment, referring to fig. 1, the IGBT three-discrete interleaved PFC type power supply device includes a central processor, a three-phase full-wave rectification module and three discrete interleaved PFC boost circuits, where the three-phase full-wave rectification module includes three rectification units, input ends of the three rectification units are respectively and correspondingly electrically connected to a three-phase ac mains, output ends of the three rectification units are respectively and correspondingly electrically connected to the three discrete interleaved PFC boost circuits, the three discrete interleaved PFC boost circuits are respectively and electrically connected to the central processor, and input ends of the three discrete interleaved PFC boost circuits are also respectively and electrically connected to an external dc power supply.
It should be noted that the central processor is used for controlling the overall operation of the power supply device; in this embodiment, the central processor is an MCU processor or a DSP processor. The three-phase full-wave rectification module comprises three rectification units which are respectively used for performing full-wave rectification on alternating current of each phase; the discrete interleaved PFC boost circuit is used for modulating and filtering waveform voltage and then outputting a direct-current power supply.
Referring to fig. 1, in one of the discrete interleaved PFC BOOST circuits, the discrete interleaved PFC BOOST circuit includes an input detection module, an interleaved PFC-DC BOOST module, an output detection module, and a discrete interleaved PFC-BOOST main control unit, an input end of the input detection module is electrically connected to one of the rectification unit and the DC power supply, an output end of the input detection module is electrically connected to the interleaved PFC-DC BOOST module, an output end of the interleaved PFC-DC BOOST module is electrically connected to the output detection module, an output end of the output detection module outputs a DC voltage, and the discrete interleaved PFC-BOOST main control unit is electrically connected to the input detection module, the interleaved PFC-DC BOOST module, the output detection module, and the central processor, respectively. It should be noted that the input detection module is configured to perform waveform detection on a voltage, and the interleaved PFC-DC boost module is configured to perform PWM modulation on the voltage; the output detection module is used for carrying out overvoltage, overcurrent and filtering on the output power supply to realize the output of the direct-current power supply after voltage stabilization and filtering.
So, through setting up three rectifier unit and three crisscross PFC boost circuit in isolation, can be with three single phase AC power split into of three single phase AC power to carry out PWM pulse width modulation to three single phase AC power alone, export into the high-power stable direct current voltage of low ripple through step-up inductance, filter capacitor filtering after again. And by adopting a three-split structure, if the phase failure occurs, the power unit with the phase failure can be controlled to stop the PWM unit, the PWM mode is converted into a traditional rectification mode, and the other one phase power unit bears all power output and reduces the power output to 1/3 of the original power, at the moment, the power factor of the power line is unchanged, and the phase failure is converted into derating use.
Referring to fig. 1, the input detection module includes a DC input unit and a waveform detection unit, an input end of the DC input unit is electrically connected to the rectifying unit and the DC power supply, an output end of the DC input unit is electrically connected to the waveform detection unit, an output end of the waveform detection unit is electrically connected to the interleaved PFC-DC BOOST module, and the DC input unit and the waveform detection unit are also electrically connected to the discrete interleaved PFC-BOOST main control unit. It should be noted that the DC input unit is used to access a DC power supply, and the waveform detection unit is used to detect a peak and a trough of a voltage and then send the detected voltage to the interleaved PFC-DC power device, that is, to the interleaved PFC-DC boost module.
Further, referring to fig. 1, the output detection module includes a voltage detection unit and a current detection sensor, an input end of the voltage detection unit is electrically connected to an output end of the interleaved PFC-DC BOOST module, an output end of the voltage detection unit is electrically connected to the current detection sensor, and the voltage detection unit and the current detection sensor are also electrically connected to the discrete interleaved PFC-BOOST main control unit, respectively. It should be noted that the voltage detection unit is used for detecting whether the output voltage is within a reasonable range to prevent overvoltage output and protect equipment from being damaged by overvoltage output; the current detection sensor is used for detecting whether the magnitude of the output current is within a reasonable range or not so as to prevent the device from being damaged due to overcurrent and overload.
Referring to fig. 1 again, the output detection module further includes an output channel unit, an input end of the output channel unit is electrically connected to an output end of the current detection sensor, an output end of the output channel unit outputs a dc voltage, and the output channel unit is further electrically connected to the discrete interleaved PFC-BOOST main control unit. The output channel unit is used for playing roles of backstopping and filtering, and preventing the output power supply voltage from returning to equipment to cause unnecessary energy waste.
In this embodiment, referring to fig. 2, the rectifying unit includes four rectifying diodes connected in sequence. The direct current input unit comprises a diode D10 and a switch K10, the anode of the diode D10 is used for being electrically connected with a direct current power supply, the cathode of the diode D10 is electrically connected with the switch K10, and the switch K10 is further electrically connected with the waveform detection unit. The waveform detection unit comprises a resistor R20 and a resistor R32, one end of the resistor R20 is electrically connected with the direct current input unit, the other end of the resistor R20 is electrically connected with the resistor R32 and the discrete interleaved PFC-BOOST main control unit respectively, and the other end of the resistor R32 is grounded. The voltage detection unit comprises a resistor R29 and a resistor R36, one end of the resistor R29 is electrically connected with the output end of the interleaved PFC-DC BOOST module, the other end of the resistor R29 is electrically connected with the resistor R36 and the discrete interleaved PFC-BOOST main control unit respectively, and the other end of the resistor R36 is grounded. The output channel unit comprises a diode D6 and a capacitor C14, wherein the anode of the diode D6 is electrically connected with the current detection sensor, the cathode of the diode D6 is electrically connected with the capacitor C14, and the cathode of the diode D6 is also used for outputting direct-current voltage.
When a mains supply passes through the rectifying unit, the alternating-current power supply is rectified into a direct-current pulsating power supply, the PFC chip detects the steamed bun waveform voltage of about 513V through the resistor R20 and the resistor R32, and the PFC chip starts to carry out duty cycle pulse regulation. Referring to fig. 3 and 4, fig. 3 is a waveform diagram of an ac mains input; fig. 4 is a graph of the voltage waveform detected by the PFC chip U3. Referring to fig. 5 and 6, fig. 5 is a waveform diagram of a synthesized current at the time of input; fig. 6 is an exploded current waveform diagram at the time of input.
It can be understood that the mains supply is respectively input through the three sets of rectifying units, the three-phase alternating current is split into three line voltages to be respectively subjected to full-wave rectification, phases of the three line voltages are different by 120 degrees at the moment, three single-phase full-wave rectified direct-current power supplies are formed and then synthesized into a DC direct-current power supply and are sent to the direct-current input unit, and the waveform detection unit detects wave crests and wave troughs of the voltage and then sends the DC direct-current power supplies to the interleaved PFC-DC power device. In another mode, the DC input is sent to the PFC-DC power device after passing through the non-return diode and the input switch, and is non-returned to the DC power source through the voltage detection unit, the current detection sensor, and the output channel, and the main control unit mainly detects the input voltage waveform, the duty ratio of the interleaved power tube, the amplitude of the output voltage, the magnitude of the output current, and the like.
In this embodiment, please refer to fig. 2, the interleaved PFC-DC boost module includes a PFC chip U3, a common-emitter type double IGBT switching tube (Q3 and Q4), and a parallel type double boost inductor (L3 or L4), the PFC chip U3 is electrically connected to the common-emitter type double IGBT switching tube respectively, the current detection sensor includes a transformer T3 and a transformer T4, a GDB pin of the PFC chip U3 is electrically connected to a control electrode of the common-emitter type double IGBT switching tube Q3, an output electrode of the common-emitter type double IGBT switching tube Q3 is electrically connected to a primary side of the transformer T3, the primary side of the transformer T3 is also electrically connected to the parallel type double boost inductor L4, and a secondary side of the transformer T3 is electrically connected to a CSB pin of the PFC chip U3 through a diode D7; the GDA pin of the PFC chip U3 is electrically connected with the control electrode of the common-emitter double IGBT switch tube Q4, the output electrode of the common-emitter double IGBT switch tube Q4 is electrically connected with the primary side of the transformer T4, the primary side of the transformer T4 is also electrically connected with the parallel double boost inductor L3, the secondary side of the transformer T4 is electrically connected with the CSA pin of the PFC chip U3 through a diode D14, and the emitting electrodes of the common-emitter double IGBT switch tubes Q3 and Q4 are electrically connected.
Specifically, the circuit is a common-emitter IGBT double-inductor interleaved PFC-BOOST circuit, the power factor is improved in a boosting mode, the difference of the circuit from the traditional mode is that the traditional PFC is in a single-pulse mode, the maximum duty ratio is not more than 50%, one IGBT bears all current, and the interleaved circuit consists of two common-emitter IGBTs and two inductors and works alternately. The maximum duty ratio can reach 100%, and the efficiency can approach 100% because two IGBTs constitute half of the current of a single IGBT. In the aspect of ripple waves, the staggered PFC is half smaller than a single PFC, so that the stress of current borne by the IGBT can be greatly reduced, the size of a power inductor is reduced, the output filter capacitor is reduced, and the ripple waves are reduced. In the PWM double-group pulse width modulation mode, the input current and voltage in-phase current waveforms are sinusoidal, so that the power factor approaches 1. After the input mode is changed into direct current, the working mode is changed into a BOOST mode from PFC, and the aim of constant power and voltage stabilization is achieved. The current sensors T3 and T4 react the current output by the DC to the PFC chip U3 in real time, the PFC chip U3 adjusts the PWM duty ratio according to the current reaction condition, and if the rear-stage short circuit occurs, the main control unit disconnects the control input end for inputting.
After the ac mains is input, the PFC chip U3 detects a multi-period three-demodulation modulation waveform, as shown in fig. 7. The PFC chip U3 detects a single-cycle three-demodulation modulation waveform as shown in fig. 8. The PFC chip U3 then sends the IGBT drive waveforms for both groups AB, as shown in fig. 9. When the PFC chip U3 detects that the power supply voltage is just in the valley, the PWM duty ratio is increased, the energy stored by the energy storage inductor is more, and the energy of the valley of the power supply is superposed for inputting when the energy of the inductor is released, so that the energy balance is achieved. When the PFC chip U3 detects that the power supply voltage is just at the wave crest, the PWM duty ratio is reduced, the energy stored by the energy storage inductor is less, the released energy is less, the output reaches energy balance after the released energy is overlapped with the voltage of the wave crest, and the output power supply ripple is very small. The corresponding output voltage waveform at this time is shown in fig. 10. The above is for example the group A operation, while the group B and group C operations are the same as group A.
It should be noted that, referring to fig. 11 and 12, when the dc power is input to the PFC chip U3 through the voltage dividing resistor for detection, the PFC chip U3 changes the operating mode to convert to the BOOST mode, and BOOSTs the input dc voltage to the rated voltage and then outputs the boosted voltage.
The invention also provides a control method of the IGBT three-discrete staggered PFC type power supply device, which comprises the following steps:
when the alternating current mains supply input state is in the state that:
splitting a three-phase alternating current commercial power into three single-phase line voltages, respectively and correspondingly performing full-wave rectification through a rectification unit, and respectively inputting the three single-phase line voltages into corresponding input detection modules;
each input detection module detects a voltage peak and a voltage trough of an input power supply and inputs the voltage peak and the voltage trough into the interleaved PFC-DC boost module;
after each interleaved PFC-DC boosting module respectively and correspondingly carries out PWM pulse width modulation on three-phase waveform voltage, the high-voltage direct-current power supply is output through overvoltage detection, overcurrent detection and non-return of an output detection module;
when in the direct current power supply input state:
after the direct current power supply is subjected to voltage division by the input detection module, the direct current power supply is input to the interleaved PFC-DC boosting module, and the central processor controls the interleaved PFC-DC boosting module to be converted into a BOOST mode;
the interleaved PFC-DC boosting module boosts the direct-current power supply and outputs the boosted direct-current power supply to the output detection module;
and the output detection module outputs the high-voltage direct-current power supply after performing overvoltage detection, overcurrent detection and non-return on the boosted direct-current voltage.
Referring to fig. 13, when ac power is input, the primary switch is turned on and the three phases detected by U3, U4 and U5 are modulated respectively, and at this time, the current is modulated by the U3, U4 and U5 in a synchronous sinusoidal rectangular pulse, so that there is no phase difference between the input sinusoidal voltage and the current, and the power factor approaches "1" as a resistive load. When direct current is input, the primary switch is disconnected, the secondary switch is closed, at the moment, the U3, the U4 and the U5 are converted into a BOOST mode, and the input power supply is boosted and then sent out. Since U3, U4 and U5 work together, each group only bears 1/3 of power. When the U3, U4 and U5 detect that no input exists in the phase loss, the main control unit closes the energy channel of the main control unit, the main control unit sends a signal to the DSP/MCU processor, and the processor performs allocation to reduce the power to 1/3 of the original power.
The device and the method adopt the combination of the common-emission double IGBTs, thereby greatly improving the efficiency and changing the situation that the current interruption and discontinuity efficiency of the traditional single-pulse PFC is not high. The invention adopts the stepless capacitor to replace the electrolytic capacitor, so that the service life is longer; and the double-inductor mode has higher frequency and smaller volume compared with the traditional single-inductor mode, and the invention adopts a three-discrete mode, thereby changing the traditional centralized mode and avoiding the condition that the whole can not work because one group is damaged. The invention adds the main control unit and can seamlessly switch between the alternating current PFC mode and the direct current BOOST mode. The invention adopts the staggered pulse mode, the current stress of the IGBT is only half of the original current stress, and the production cost is reduced.
The above embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (9)

1. A control method of an IGBT three-discrete interleaved PFC type power supply device is characterized by comprising the following steps: the three-phase full-wave rectification module comprises three rectification units, the input ends of the three rectification units are respectively and correspondingly electrically connected with a three-phase alternating current commercial power, the output ends of the three rectification units are respectively and correspondingly electrically connected with the three discrete staggered PFC booster circuits, the three discrete staggered PFC booster circuits are respectively and electrically connected with the central processor, and the input ends of the three discrete staggered PFC booster circuits are also respectively and electrically connected with an external direct current power supply;
in one discrete interleaved PFC BOOST circuit, the discrete interleaved PFC BOOST circuit includes an input detection module, an interleaved PFC-DC BOOST module, an output detection module, and a discrete interleaved PFC-BOOST main control unit, an input end of the input detection module is electrically connected to one of the rectification unit and the DC power supply, an output end of the input detection module is electrically connected to the interleaved PFC-DC BOOST module, an output end of the interleaved PFC-DC BOOST module is electrically connected to the output detection module, an output end of the output detection module outputs a DC voltage, and the discrete interleaved PFC-BOOST main control unit is electrically connected to the input detection module, the interleaved PFC-DC BOOST module, the output detection module, and the central processor, respectively;
the control method of the IGBT three-discrete staggered PFC type power supply device comprises the following steps:
when the alternating current mains supply input state is in the following state:
splitting a three-phase alternating current commercial power into three single-phase line voltages, respectively and correspondingly performing full-wave rectification through a rectification unit, and respectively inputting the three single-phase line voltages into corresponding input detection modules;
each input detection module detects a voltage peak and a voltage trough of an input power supply and inputs the voltage peak and the voltage trough into the interleaved PFC-DC boost module;
after each interleaved PFC-DC boosting module respectively and correspondingly carries out PWM pulse width modulation on three-phase waveform voltage, a direct-current power supply is output after overvoltage detection, overcurrent detection and filtering of an output detection module;
when in the direct current power supply input state:
after the direct current power supply is subjected to voltage division by the input detection module, the direct current power supply is input to the interleaved PFC-DC BOOST module, and the central processor controls the interleaved PFC-DC BOOST module to be converted into a BOOST mode;
the interleaved PFC-DC boosting module boosts the direct-current power supply and outputs the boosted direct-current power supply to the output detection module;
and the output detection module outputs the direct-current power supply after performing overvoltage detection, overcurrent detection and filtering on the boosted direct-current voltage.
2. The method according to claim 1, wherein the input detection module comprises a DC input unit and a waveform detection unit, an input terminal of the DC input unit is electrically connected to the rectifying unit and the DC power supply, an output terminal of the DC input unit is electrically connected to the waveform detection unit, an output terminal of the waveform detection unit is electrically connected to the interleaved PFC-DC BOOST module, and the DC input unit and the waveform detection unit are further electrically connected to the interleaved PFC-BOOST main control unit.
3. The method according to claim 1, wherein the output detection module comprises a voltage detection unit and a current detection sensor, an input terminal of the voltage detection unit is electrically connected to an output terminal of the interleaved PFC-DC BOOST module, an output terminal of the voltage detection unit is electrically connected to the current detection sensor, and the voltage detection unit and the current detection sensor are further electrically connected to the interleaved PFC-BOOST main control unit, respectively.
4. The method of claim 3, wherein the output detection module further comprises an output channel unit, an input end of the output channel unit is electrically connected to an output end of the current detection sensor, an output end of the output channel unit outputs a direct current voltage, and the output channel unit is further electrically connected to the discrete interleaved PFC-BOOST main control unit.
5. The control method of an IGBT three-dimensional interleaved PFC type power supply device according to claim 1, wherein the rectifying unit comprises four rectifying diodes connected in sequence.
6. The method according to claim 2, wherein the dc input unit comprises a diode D10 and a switch K10, wherein an anode of the diode D10 is electrically connected to a dc power supply, a cathode of the diode D10 is electrically connected to the switch K10, and the switch K10 is further electrically connected to the waveform detection unit.
7. The method according to claim 2, wherein the waveform detection unit comprises a resistor R20 and a resistor R32, one end of the resistor R20 is electrically connected to the dc input unit, the other end of the resistor R20 is electrically connected to the resistor R32 and the discrete interleaved PFC-BOOST main control unit, respectively, and the other end of the resistor R32 is grounded.
8. The control method of the IGBT three-separate interleaved PFC type power supply device according to claim 3, wherein the voltage detection unit comprises a resistor R29 and a resistor R36, one end of the resistor R29 is electrically connected to the output end of the interleaved PFC-DC BOOST module, the other end of the resistor R29 is electrically connected to the resistor R36 and the separate interleaved PFC-BOOST main control unit, respectively, and the other end of the resistor R36 is grounded.
9. The method according to claim 4, wherein said output channel unit comprises a diode D6 and a capacitor C14, wherein an anode of said diode D6 is electrically connected to said current detection sensor, a cathode of said diode D6 is electrically connected to said capacitor C14, and a cathode of said diode D6 is further used for outputting a DC voltage.
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Denomination of invention: IGBT Three way Interchange PFC Power Supply Device and Its Control Method

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