CN113271003A - PFC conversion circuit of uninterruptible power supply and control method - Google Patents

PFC conversion circuit of uninterruptible power supply and control method Download PDF

Info

Publication number
CN113271003A
CN113271003A CN202110668039.0A CN202110668039A CN113271003A CN 113271003 A CN113271003 A CN 113271003A CN 202110668039 A CN202110668039 A CN 202110668039A CN 113271003 A CN113271003 A CN 113271003A
Authority
CN
China
Prior art keywords
module
igbt
driving
voltage
power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202110668039.0A
Other languages
Chinese (zh)
Other versions
CN113271003B (en
Inventor
李志忠
朱於峰
陈明义
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong University of Technology
Original Assignee
Guangdong University of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong University of Technology filed Critical Guangdong University of Technology
Priority to CN202110668039.0A priority Critical patent/CN113271003B/en
Publication of CN113271003A publication Critical patent/CN113271003A/en
Application granted granted Critical
Publication of CN113271003B publication Critical patent/CN113271003B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • 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
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
    • 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
    • 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
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)

Abstract

The invention discloses a PFC (power factor correction) conversion circuit of an uninterruptible power supply and a control method, wherein the conversion circuit comprises a main power circuit and a control circuit; the main power circuit comprises an input AC voltage source, an IGBT S without a body diode1IGBT S without body diode2IGBT S without body diode3IGBT S without body diode4IGBT S without body diode5IGBT S without body diode6Power inductor L1An output filter capacitor C1And a load resistor R1Wherein: the control circuit comprises an input voltage detection module, a first drive module Ps1A second driving module Ps2The third driving module Ps3Fourth drive Module Ps4PWM driving signal module, comparator module and additionThe device comprises a device module, an integrator module, an inductive current sampling module, an error amplifier and an output voltage sampling module. The invention can reduce energy loss and improve efficiency, and the input side has high power factor and small influence degree on the power grid.

Description

PFC conversion circuit of uninterruptible power supply and control method
Technical Field
The invention relates to the technical field of electric energy conversion, in particular to a PFC conversion circuit of an uninterruptible power supply and a control method.
Background
Uninterruptible Power Supplies (UPS) are mainly used to Supply Power to computers and other Power electronic devices, which have high requirements for Power quality. The input side of a traditional UPS is connected with a power grid, the power grid is used as direct current to supply power to the UPS after uncontrollable rectification, and the harmonic content of the current on the power grid side is high due to the adoption of an uncontrollable rectification mode. Therefore, the UPS with the structure has low power factor at the network side during work, the clean energy is promoted to be used nowadays, and the device obviously does not meet the requirement of green energy.
In order to improve the power factor, a passive power factor correction circuit and an active power factor correction circuit can be adopted, and the active power factor correction circuit is adopted, so that the active power factor correction circuit is more and more widely applied to a UPS (uninterrupted power supply) power supply due to the small correction volume and the high PF value, while the Boost topology is generally adopted for the traditional active factor correction, the output voltage is higher, the requirement on the voltage stress of a power device of a rear-stage inverter circuit is higher, and the energy loss can be caused when a front stage passes through a rectifier bridge, so that the improvement of the efficiency of the UPS power supply is limited.
Disclosure of Invention
In order to solve the problems of the traditional Boost type active power factor rectification and the uncontrollable rectification of the traditional rectifier bridge, the invention provides the PFC conversion circuit and the control method of the uninterruptible power supply, which can reduce energy loss and improve efficiency, and have high input side power factor and small influence degree on a power grid.
In order to realize the task, the invention adopts the following technical scheme:
a PFC conversion circuit of an uninterruptible power supply comprises a main power circuit and a control circuit;
the main power circuit comprises an input AC voltage source, an IGBT S without a body diode1IGBT S without body diode2IGBT S without body diode3IGBT S without body diode4IGBT S without body diode5IGBT S without body diode6Power inductor L1An output filter capacitor C1And a load resistor R1Wherein:
IGBT S1and IGBT S2Is connected to one end of the input alternating voltage source; IGBT S1Collector electrode of (1), IGBT S2Emitter electrode of, IGBT S3Collector electrode of (1), IGBT S4Are all connected to a power inductor L1Front end of (IGBT S)3Is connected with the IGBT S5Emitter and output filter capacitor C1Upper electrode plate and load resistor R1Upper end of IGBT S5Collector and IGBT S6And IGBT S6Collector and IGBT S4Collector electrode, output filter capacitor C1Lower plate and load resistor R1The lower ends of the two are connected; power inductor L1Is connected with the IGBT S5Collector and IGBT S6Is connected with the other end of the input alternating voltage source, and generates an input voltage V by inputting the alternating voltage sourceac(ii) a Load resistance R1Generates an output voltage V acrossout；
The control circuit comprises an input voltage detection module, a first drive module Ps1A second driving module Ps2The third driving module Ps3Fourth drive Module Ps4PWM drive signal module, comparator module, adder module, integrator module, inductive current sampling module, error amplifier, output voltage sampling module, wherein:
the input voltage detection module, the output voltage sampling module and the inductive current sampling module respectively obtain input voltage V from the main power circuitinAn output voltage VoutPower inductor L1Upper inductor sense current IL1Data; the input voltage detection module is respectively connected with the first driving module Ps1The third driving module Ps3Connected, a first driving module Ps1And a second driving module Ps2Connected, third drive module Ps3And a fourth drive module Ps4Connecting; output of output voltage sampling module and reference voltage VrefThe output of the error amplifier is connected with the adder module and the integrator module; the outputs of the adder module and the integrator module enter a comparator module, the output of the comparator module enters a PWM driving signal module, and the PWM driving signal module and the first driving module are respectively connectedPs1The third driving module Ps3And (4) connecting.
A control method of a PFC conversion circuit of an uninterruptible power supply comprises the following steps:
output voltage sampling module for output voltage VoutSampling the output voltage sampled value VoAnd a reference voltage VrefObtaining an error voltage value V by an error amplifiereOne path of error voltage value VeSending the power inductance L to an adder module and obtaining the power inductance L with an inductance current sampling module1Upper inductor sense current IL1Summing to obtain VmAnother error voltage value VeSending the signal into an integrator module for integration to obtain V1(ii) a Finally, V is converted into1And VmSending the data to a comparator module to obtain a comparison result V2The PWM driving signal module is used for driving the signal according to the comparison result V2Generating a PWM drive signal PsAccording to the input voltage detection module to the input voltage VinIs determined to be the first driving module Ps1Or a third driving module Ps3According to PWM drive signal PsSending out a driving waveform:
if V is judgedinWhen the voltage is more than 0, the first driving module Ps1And a second driving module Ps2Alternately sending out driving waveforms; at this time, the third driving module Ps3No drive waveform is emitted.
If V is judgedin<At 0, the third driving module Ps3And a fourth drive module Ps4Alternately sending out driving waveforms, at the moment, the first driving module Ps1No drive waveform is emitted.
Further, when the input voltage V is appliedinIs a positive half cycle and is currently the first drive module Ps1When the driving waveform is sent out, the first driving module Ps1Drive IGBT S2Conducting, and keeping the rest IGBTs without the body diodes in a closed state; the input current passes through IGBT S2Power inductor L1Forming a loop, a power inductor L1Energy storage and simultaneous output filter capacitor C1To a load R1And (4) supplying power.
Further, when inputting electricityPressure VinIs a positive half cycle and is currently the second drive module Ps2When the driving waveform is sent out, the second driving module Ps2IGBT S for driving diode without body4、IGBT S5Is conducted and is a power inductor L1Follow current, power inductance L1To an output filter capacitor C1Charging while applying a voltage to a load R1And (4) supplying power.
Further, when the input voltage V is appliedinIs a negative half cycle and is currently the third drive module Ps3When the driving waveform is sent out, the third driving module Ps3IGBT S for driving diode without body1The rest IGBTs without diodes are in a closed state, and the input current passes through the power inductor L1、IGBT S1Forming a loop, a power inductor L1Energy storage and simultaneous output filter capacitor C1To a load R1And (4) supplying power.
Further, when the input voltage V is appliedinIs a negative half cycle and is currently the fourth drive module Ps4When the driving waveform is sent out, the fourth driving module Ps4IGBT S for driving diode without body3、IGBT S6Is conducted and is a power inductor L1Follow current, power inductance L1To an output filter capacitor C1Charging while applying a voltage to a load R1And (4) supplying power.
Further, by the second driving module Ps2Fourth drive Module Ps4Respectively connected with the first driving module Ps1The third driving module Ps3Staggered conduction is realized, thereby realizing the IGBTS without a body diode1、S2、S3、S4、S5、S6To achieve the purpose of power factor correction.
An electronic device comprises a PFC conversion circuit of the uninterruptible power supply.
Compared with the prior art, the invention has the following technical characteristics:
the circuit structure provided by the invention can reduce energy loss and improve efficiency, and the input side power factor is high. Compared with a Boost type active power factor, the output voltage of the UPS is greatly reduced, and the voltage stress of a subsequent inverter power device of the UPS can be reduced to a certain extent.
Drawings
FIG. 1 is a single-phase UPS rectifier system;
FIG. 2 is a circuit configuration of a single-phase UPS rectifier;
FIG. 3 illustrates a first mode of operation of the UPS rectifier;
FIG. 4 illustrates a second mode of operation of the UPS rectifier;
FIG. 5 shows a third mode of operation of the UPS rectifier;
FIG. 6 shows a fourth mode of operation of the UPS rectifier;
FIG. 7 is a drive module generation principle;
FIG. 8 is a driving waveform generated by the driving module;
FIG. 9 is a diagram illustrating simulation results of FIG. 1;
fig. 10 is a diagram illustrating simulation results 2.
Detailed Description
The invention discloses a PFC (power factor correction) conversion circuit of an uninterruptible power supply, which has a structural schematic diagram shown in figure 1 and comprises a control circuit 2 and a UPS rectifier circuit serving as a main power circuit 1; the control circuit is connected with the main power circuit; the main power circuit 1 comprises an input alternating voltage source, an IGBT S without a body diode1IGBT S without body diode2IGBT S without body diode3IGBT S without body diode4IGBT S without body diode5IGBT S without body diode6Power inductor L1An output filter capacitor C1And a load resistor R1Wherein:
IGBT S1and IGBT S2Is connected to one end of the input alternating voltage source; IGBT S1Collector electrode of (1), IGBT S2Emitter electrode of, IGBT S3Collector electrode of (1), IGBT S4Are all connected to a power inductor L1Front end of (IGBT S)3Is connected with the IGBT S5OfEmitter, output filter capacitor C1Upper electrode plate and load resistor R1Upper end of IGBT S5Collector and IGBT S6And IGBT S6Collector and IGBT S4Collector electrode, output filter capacitor C1Lower plate and load resistor R1The lower ends of the two are connected; power inductor L1Is connected with the IGBT S5Collector and IGBT S6Is connected with the other end of the input alternating voltage source, and generates an input voltage V by inputting the alternating voltage sourceac(ii) a Load resistance R1Generates an output voltage V acrossout。
Referring to fig. 1, the control circuit of the present invention includes an input voltage detection module 2-1, a first driving module Ps12-2, second drive Module Ps22-4, third drive Module Ps32-3, fourth drive Module Ps42-5, a PWM driving signal module 2-6, a comparator module 2-7, an adder module 2-8, an integrator module 2-9, an inductive current sampling module 2-10, an error amplifier 2-11, and an output voltage sampling module 2-12, wherein:
the input voltage detection module 2-1, the output voltage sampling module 2-12 and the inductive current sampling module 2-10 respectively obtain input voltage V from the main power circuit 1inAn output voltage VoutPower inductor L1Upper inductor sense current IL1Data; the input voltage detection module 2-1 is respectively connected with the first driving module Ps12-2, third drive Module Ps32-3 connection, first driving module Ps12-2 and a second driver module Ps22-4 connection, third driving module Ps32-3 and a fourth driving module Ps42-5 connection; output of output voltage sampling module 2-12 and reference voltage VrefThe input signals enter an error amplifier 2-11, and the output of the error amplifier 2-11 is connected with an adder module 2-8 and an integrator module 2-9; the outputs of the adder module 2-8 and the integrator module 2-9 enter a comparator module 2-7, the output of the comparator module 2-7 enters a PWM driving signal module 2-6, and the PWM driving signal module 2-6 and a first driving module P are respectively connected with the first driving module Ps12-2, third drive Module Ps3 2-3, connecting.
The control method comprises the following steps:
firstly, output voltage sampling modules 2-12 are used for sampling output voltage VoutSampling the output voltage sampled value VoAnd a reference voltage VrefObtaining an error voltage value V by an error amplifiereOne path of error voltage value VeAnd the input signal is sent to an adder module 2-8, and the inductor current sampling module 2-10 obtains a power inductor L1Upper inductor sense current IL1Summing to obtain VmAnother error voltage value VeSending the signal into an integrator module 2-9 for integration to obtain V1(ii) a Finally, V is converted into1And VmSent to a comparator module 2-7 to obtain a comparison result V2The PWM driving signal module 2-6 is used for comparing the voltage value with the reference voltage value V2Generating a PWM drive signal PsAccording to the input voltage detection module 2-1, the input voltage V is detectedinIs determined to be the first driving module Ps12-2 is also the third drive module Ps32-3 Driving the Signal P according to PWMsSending out a driving waveform:
if V is judgedinWhen the voltage is more than 0, the first driving module Ps1And a second driving module Ps2Alternately sending out driving waveforms; at this time, the third driving module Ps3No drive waveform is emitted.
If V is judgedinWhen < 0, the third driving module Ps3And a fourth drive module Ps4Alternately sending out driving waveforms, at the moment, the first driving module Ps1No drive waveform is emitted.
The first working mode is as follows:
when the AC input of the AC voltage source is a positive half cycle and is currently the first driving module Ps1When the driving waveform is sent out, the first driving module Ps1Drive IGBT S2Conducting, and keeping the rest IGBTs without the body diodes in a closed state; the input current passes through IGBT S2Power inductor L1Forming a loop, a power inductor L1Energy storage and simultaneous output filter capacitor C1To a load R1And (4) supplying power. The circuit operating state during this period is shown in fig. 3.
The second working mode is as follows:
when the AC input of the AC voltage source is a positive half cycle and is currently the second driving module Ps2When the driving waveform is sent out, the second driving module Ps2IGBTS driving diode without body4、IGBTS5Is conducted and is a power inductor L1Follow current, power inductance L1To an output filter capacitor C1Charging while applying a voltage to a load R1The power is supplied during which the circuit operates as shown in figure 4.
The working mode is three:
when the AC input of the AC voltage source is a negative half cycle and is currently the third driving module Ps3When the driving waveform is sent out, the third driving module Ps3IGBT S for driving diode without body1The rest IGBTs without diodes are in a closed state, and the input current passes through the power inductor L1、IGBT S1Forming a loop, a power inductor L1Energy storage and simultaneous output filter capacitor C1To a load R1Energy supply; the circuit operating state during this period is shown in fig. 5.
Working mode four:
when the AC input of the input AC voltage source is a negative half cycle and is currently the fourth driving module Ps4When the driving waveform is sent out, the fourth driving module Ps4IGBT S for driving diode without body3、IGBT S6Is conducted and is a power inductor L1Follow current, power inductance L1To an output filter capacitor C1Charging while applying a voltage to a load R1Energy supply; the circuit operating state during this period is shown in fig. 6.
Thereby, through the second driving module Ps2Fourth drive Module Ps4Respectively connected with the first driving module Ps1The third driving module Ps3Staggered conduction is realized, thereby realizing the IGBTS without a body diode1、S2、S3、S4、S5、S6To achieve the purpose of power factor correction.
In one embodiment of the invention, the drive module is generated according to the principle ofShown in FIG. 7, VinInput voltage detection module 2-1 pair of input voltage VinThe polarity is judged, and AC input voltage VinBy R2、R3And R4、R5Two-component voltage resistor converts input AC voltage into small signal AC, and resistor R3And R4Common ground; meanwhile, a bidirectional voltage stabilizing diode TVS is added to play a role of protecting an operational amplifier OPAMP when the circuit is abnormal, and the output of the operational amplifier OPAMP is generated for S through a preset logic gate circuit1、S2、S3、S4、S5、S6The control signal of (2). The comparison of two input ends of OPAMP can determine the output signal VinHigh or low, at VinWhen the positive half period is detected, the potential of the in-phase input end of the OPAMP is positive, the potential of the reverse end input end is negative, and the OPAMP outputs high level; on the contrary, in VinThe OPAMP outputs a low level during the negative half cycle, and is selected to be at VinWhen > 0, there is a drive signal or VinHas a drive signal < 0, and at Vin> 0 and VinIf < 0, the driving is required to be alternately conducted, and the generation principle is shown in FIG. 7.
Simulation experiment:
in order to verify the correctness of the circuit structure of the novel single-phase UPS rectifier, the proposed rectifier circuit structure is built by Matlab/Simulink, and the simulation structure is shown in fig. 9 and 10, and the result shows that: the circuit structure of the single-phase UPS rectifier has the function of power factor correction, can realize the periodic tracking voltage of current and reduce the distortion of a power grid, has good robustness and reaches a stable state within 0.01 second. By applying the method, the output voltage can be quickly stabilized at about 350V, the stabilization time is about 0.01, and high working efficiency is realized; the IGBT without the body diode does not have the problem of reverse cut-off when the diode continues current, thereby avoiding the current dead angle, greatly improving the power factor and reducing the total harmonic distortion.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims (8)

1. A PFC conversion circuit of an uninterruptible power supply is characterized by comprising a main power circuit (1) and a control circuit (2);
the main power circuit (1) comprises an input alternating voltage source, an IGBT S without a body diode1IGBT S without body diode2IGBT S without body diode3IGBT S without body diode4IGBT S without body diode5IGBT S without body diode6Power inductor L1An output filter capacitor C1And a load resistor R1Wherein:
IGBT S1and IGBT S2Is connected to one end of the input alternating voltage source; IGBT S1Collector electrode of (1), IGBT S2Emitter electrode of, IGBT S3Collector electrode of (1), IGBT S4Are all connected to a power inductor L1Front end of (IGBT S)3Is connected with the IGBT S5Emitter and output filter capacitor C1Upper electrode plate and load resistor R1Upper end of IGBT S5Collector and IGBT S6And IGBT S6Collector and IGBT S4Collector electrode, output filter capacitor C1Lower plate and load resistor R1The lower ends of the two are connected; power inductor L1Is connected with the IGBT S5Collector and IGBT S6Is connected with the other end of the input alternating voltage source, and generates an input voltage V by inputting the alternating voltage sourceac(ii) a Load resistance R1Generates an output voltage V acrossout；
The control circuit (2) comprises an input voltage detection module (2-1) and a first drive module Ps1(2-2) second drive Module Ps2(2-4) third drive Module Ps3(2-3) fourth drive Module Ps4(2-5), PWM drive signal module (2-6), comparator module (2-7), adder module (2-8), integrator module (2-9), inductive current sampling module (2-10), error amplifier (2-11), output voltage sampling module (2-12), wherein:
the input voltage detection module (2-1), the output voltage sampling module (2-12) and the inductive current sampling module (2-10) respectively obtain input voltage V from the main power circuit (1)inAn output voltage VoutPower inductor L1Upper inductor sense current IL1Data; the input voltage detection module (2-1) is respectively connected with the first driving module Ps1(2-2) third drive Module Ps3(2-3) connection, first driver module Ps1(2-2) and a second driving module Ps2(2-4) connection, third drive module Ps3(2-3) and fourth drive Module Ps4(2-5) connecting; the output of the output voltage sampling module (2-12) and a reference voltage VrefThe input signals enter an error amplifier (2-11), and the output of the error amplifier (2-11) is connected with an adder module (2-8) and an integrator module (2-9); the outputs of the adder modules (2-8) and the integrator modules (2-9) enter the comparator modules (2-7), the outputs of the comparator modules (2-7) enter the PWM driving signal modules (2-6), and the PWM driving signal modules (2-6) and the first driving module P are respectively connected with the PWM driving signal modules (2-6)s1(2-2) third drive Module Ps3And (2-3) connecting.
2. A control method of a PFC conversion circuit of an uninterruptible power supply is characterized by comprising the following steps:
output voltage sampling module (2-12) for output voltage VoutSampling the output voltage sampled value VoAnd a reference voltage VrefObtaining an error voltage value V by an error amplifiereOne path of error voltage value VeAnd the input signal is sent to an adder module (2-8) and is subjected to power inductance L acquisition by an inductance current sampling module (2-10)1On inductance detectionCurrent IL1Summing to obtain VmAnother error voltage value VeSending the signal into an integrator module (2-9) for integration to obtain V1(ii) a Finally, V is converted into1And VmSending the data to a comparator module (2-7) to obtain a comparison result V2The PWM driving signal module (2-6) compares the comparison result V with the reference voltage V2Generating a PWM drive signal PsAccording to the input voltage detection module (2-1), the input voltage V is detectedinIs determined to be the first driving module Ps1(2-2) also the third drive Module Ps3(2-3) driving the signal P according to the PWMsSending out a driving waveform:
if V is judgedinWhen the voltage is more than 0, the first driving module Ps1And a second driving module Ps2Alternately sending out driving waveforms; at this time, the third driving module Ps3No drive waveform is emitted.
If V is judgedinWhen < 0, the third driving module Ps3And a fourth drive module Ps4Alternately sending out driving waveforms, at the moment, the first driving module Ps1No drive waveform is emitted.
3. The method as claimed in claim 2, wherein the input voltage V is a voltage VinIs a positive half cycle and is currently the first drive module Ps1When the driving waveform is sent out, the first driving module Ps1Drive IGBT S2Conducting, and keeping the rest IGBTs without the body diodes in a closed state; the input current passes through IGBT S2Power inductor L1Forming a loop, a power inductor L1Energy storage and simultaneous output filter capacitor C1To a load R1And (4) supplying power.
4. The method as claimed in claim 2, wherein the input voltage V is a voltage VinIs a positive half cycle and is currently the second drive module Ps2When the driving waveform is sent out, the second driving module Ps2IGBT S for driving diode without body4、IGBT S5Is conducted and is a power inductor L1Follow current, power inductance L1To an output filter capacitor C1Charging while applying a voltage to a load R1And (4) supplying power.
5. The method as claimed in claim 2, wherein the input voltage V is a voltage VinIs a negative half cycle and is currently the third drive module Ps3When the driving waveform is sent out, the third driving module Ps3IGBT S for driving diode without body1The rest IGBTs without diodes are in a closed state, and the input current passes through the power inductor L1、IGBT S1Forming a loop, a power inductor L1Energy storage and simultaneous output filter capacitor C1To a load R1And (4) supplying power.
6. The method as claimed in claim 2, wherein the input voltage V is a voltage VinIs a negative half cycle and is currently the fourth drive module Ps4When the driving waveform is sent out, the fourth driving module Ps4IGBT S for driving diode without body3、IGBT S6Is conducted and is a power inductor L1Follow current, power inductance L1To an output filter capacitor C1Charging while applying a voltage to a load R1And (4) supplying power.
7. The method of claim 2, wherein the second driving module P is used to control the PFC conversion circuit of the UPSs2Fourth drive Module Ps4Respectively connected with the first driving module Ps1The third driving module Ps3Staggered conduction is realized, thereby realizing the IGBT S without a body diode1、S2、S3、S4、S5、S6To achieve the purpose of power factor correction.
8. An electronic device, characterized in that the electronic device comprises a PFC converter circuit of the uninterruptible power supply according to claim 1.
CN202110668039.0A 2021-06-16 2021-06-16 PFC conversion circuit of uninterruptible power supply and control method Active CN113271003B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110668039.0A CN113271003B (en) 2021-06-16 2021-06-16 PFC conversion circuit of uninterruptible power supply and control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110668039.0A CN113271003B (en) 2021-06-16 2021-06-16 PFC conversion circuit of uninterruptible power supply and control method

Publications (2)

Publication Number Publication Date
CN113271003A true CN113271003A (en) 2021-08-17
CN113271003B CN113271003B (en) 2022-04-15

Family

ID=77235155

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110668039.0A Active CN113271003B (en) 2021-06-16 2021-06-16 PFC conversion circuit of uninterruptible power supply and control method

Country Status (1)

Country Link
CN (1) CN113271003B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115474311A (en) * 2022-08-09 2022-12-13 哈尔滨理工大学 LED driving power supply and control method thereof

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6349044B1 (en) * 1999-09-09 2002-02-19 Virginia Tech Intellectual Properties, Inc. Zero voltage zero current three level dc-dc converter
CN102170238A (en) * 2011-05-05 2011-08-31 天宝电子（惠州）有限公司 AC (alternating-current) rectifying circuit with PFC (power factor correction) function
CN102790422A (en) * 2012-07-30 2012-11-21 广东易事特电源股份有限公司 Uninterrupted power supply (UPS) charging module device and control method thereof
US20150263605A1 (en) * 2014-03-14 2015-09-17 Delta-Q Technologies Corp. Hybrid resonant bridgeless ac-dc power factor correction converter
CN106664027A (en) * 2014-05-01 2017-05-10 施耐德电气It公司 Power supply control
CN110784115A (en) * 2019-11-14 2020-02-11 中南大学 High-reliability high-power-density single-phase current type converter
CN212850263U (en) * 2020-08-17 2021-03-30 广东工业大学 Novel OCC voltage-reducing PFC circuit
CN112803821A (en) * 2021-03-08 2021-05-14 宜宾职业技术学院 Two-stage three-level double-voltage-reduction photovoltaic grid-connected inverter, control method and system

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6349044B1 (en) * 1999-09-09 2002-02-19 Virginia Tech Intellectual Properties, Inc. Zero voltage zero current three level dc-dc converter
CN102170238A (en) * 2011-05-05 2011-08-31 天宝电子（惠州）有限公司 AC (alternating-current) rectifying circuit with PFC (power factor correction) function
CN102790422A (en) * 2012-07-30 2012-11-21 广东易事特电源股份有限公司 Uninterrupted power supply (UPS) charging module device and control method thereof
US20150263605A1 (en) * 2014-03-14 2015-09-17 Delta-Q Technologies Corp. Hybrid resonant bridgeless ac-dc power factor correction converter
CN106664027A (en) * 2014-05-01 2017-05-10 施耐德电气It公司 Power supply control
CN110784115A (en) * 2019-11-14 2020-02-11 中南大学 High-reliability high-power-density single-phase current type converter
CN212850263U (en) * 2020-08-17 2021-03-30 广东工业大学 Novel OCC voltage-reducing PFC circuit
CN112803821A (en) * 2021-03-08 2021-05-14 宜宾职业技术学院 Two-stage three-level double-voltage-reduction photovoltaic grid-connected inverter, control method and system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
N. KANNAN，ET AL: "interleaved bridgeless PFC rectifier for UPS application using current controllers", 《2015 IEEE INTERNATIONAL CONFERENCE ON ELECTRICAL, COMPUTER AND COMMUNICATION TECHNOLOGIES (ICECCT)》 *
李秋如，等: "数字单周控制的三相三开关APFC电路的研究", 《电气应用》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115474311A (en) * 2022-08-09 2022-12-13 哈尔滨理工大学 LED driving power supply and control method thereof

Also Published As

Publication number Publication date
CN113271003B (en) 2022-04-15

Similar Documents

Publication Publication Date Title
WO2017107401A1 (en) Direct-current bus voltage ripple compensation method and photovoltaic inverter
CN109194113B (en) Power factor corrector with active power decoupling function and control method thereof
CN113224942B (en) Non-isolated Buck-Boost bridgeless PFC converter system
CN111431394B (en) Control method of buck single-phase three-level bridgeless PFC converter system
CN212850263U (en) Novel OCC voltage-reducing PFC circuit
CN108667337A (en) Highpowerpulse load power source device with fast dynamic response and its control method
CN103840670A (en) Energy-saving type high-frequency switching power source
CN211630095U (en) Single-phase three-level Buck PFC rectifier
CN103166489A (en) Control circuit for three-phase high power factor rectifier
US20230208279A1 (en) Active diode circuit and ac/dc power conversion circuit
Zeng et al. An improved control scheme for buck PFC converter for high efficiency adapter application
CN113271003B (en) PFC conversion circuit of uninterruptible power supply and control method
CN110165921B (en) Switch inductor type quasi Z source inverter with high output voltage gain
CN103647448A (en) Integrated step-down-flyback type high power factor constant current circuit and device
CN102856928A (en) Inverter
CN211959064U (en) Novel non-isolated Buck PFC converter system
CN111342684B (en) Single-phase three-level Buck PFC rectifier and control method thereof
CN203151389U (en) Control circuit of three-phase high power factor rectifier
CN201956901U (en) Power factor correction control circuit
CN211959080U (en) Buck three-phase four-wire three-level PFC rectifier system
CN111431420B (en) Control method of three-phase four-wire system three-level Buck PFC rectifier system
CN116317499A (en) Single-phase inverter based on flying capacitor type three-level boost and control method
CN112087128B (en) Interleaved bridgeless Buck PFC rectifier system
CN110868091A (en) Nonlinear control method of vehicle-mounted charger PFC converter based on differential flatness
CN110912193B (en) Micro-inverter alternating current side power coupling system and control method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant