CN110829826A - Buck three-phase power factor correction circuit with large direct-current voltage gain - Google Patents

Buck three-phase power factor correction circuit with large direct-current voltage gain Download PDF

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Publication number
CN110829826A
CN110829826A CN201911220339.1A CN201911220339A CN110829826A CN 110829826 A CN110829826 A CN 110829826A CN 201911220339 A CN201911220339 A CN 201911220339A CN 110829826 A CN110829826 A CN 110829826A
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diode
inductor
filter
phase
anode
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CN201911220339.1A
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颜景斌
贾云飞
李航天
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Harbin University of Science and Technology
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Harbin University of Science and Technology
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Priority to CN201911220339.1A priority Critical patent/CN110829826A/en
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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
    • 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
    • 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
    • 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
    • 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

Abstract

The invention relates to a buck three-phase power factor correction circuit with large direct-current voltage gain. The risk of short circuit of input voltage does not exist in the switching of the switches in the harmonic current injection circuit, and the commutation between the bridge arms of the injection branch can realize smooth transition without dead zones, so that the distortion of the input current is further reduced; a tap inductance circuit is introduced, the winding is divided into two parts of n1 and n2, and different direct current gains can be obtained under the same switching tube duty ratio by changing the value of n1 or n2, namely the function of widening the duty ratio is achieved; and the large direct current voltage gain step-down output is realized by combining the on-off control of the harmonic current injection circuit. The invention does not need complex vector control, can realize large direct current voltage gain step-down output while realizing three-phase input current sine by adopting a DC/DC PWM control technology, is convenient and easy to control, not only widens the working range of duty ratio, but also is beneficial to reducing conduction loss.

Description

Buck three-phase power factor correction circuit with large direct-current voltage gain
Technical Field
The invention relates to the field of electric energy conversion, in particular to a large direct-current voltage gain buck three-phase power factor correction circuit.
Technical Field
Uncontrollable rectification or phase-controlled rectification in the power electronic device can generate a large amount of harmonic current on the side of a power grid, so that the utilization rate of a power supply system is low, the loss is large, the normal work of electric equipment is influenced, even the stable operation of the whole power grid is endangered, the harmonic treatment is more and more emphasized by academia and governments of various countries, and a plurality of harmonic limiting standards are provided for standardizing the harmonic content of the electric equipment. Standards such as IEC61000-3-2, GB17625.1, etc. specify the harmonic current limit of electronic devices, and only electronic devices meeting the specification are allowed to be marketed.
The power electric equipment with power of more than 5 kilowatts usually adopts high-power electric equipment with three-phase power supply, the generated harmonic pollution is large, the Power Factor Correction (PFC) technology is not generally applied, and the method mainly comes from the fact that the development of the three-phase PFC technology is not mature enough, and the system structure and control are complex in practical application and difficult to realize. The most common three-phase PFC circuit structure is a PWM rectifier, which can be classified into two categories: a voltage-mode PWM rectifier and a current-mode PWM rectifier. The former is a boost structure, the output voltage is greater than the peak value of the three-phase input line voltage, and the output direct-current voltage generally reaches 700-800V for domestic 380V (European 400V) industrial electricity; 480V (or 600V) power supply in North America regions, and the output voltage is higher. The current type PWM rectifier is of a voltage reduction type structure and is suitable for the application occasion of low-voltage output. In recent years, a harmonic current injection type three-phase PFC circuit appears, for example, a SWISS rectifier is one of voltage reduction structures, but an interphase short circuit risk is easy to occur in a harmonic current injection network, and when a lower voltage is output, the duty ratio is too small, so that the optimization of the system efficiency is not facilitated.
Disclosure of Invention
In view of this, the present invention provides a buck three-phase power factor correction circuit with large dc voltage gain, which widens the duty ratio and realizes three-phase power factor correction under the buck condition with large dc voltage gain.
The technical scheme adopted by the invention is as follows:
a buck three-phase power factor correction circuit with large direct-current voltage gain comprises a three-phase alternating-current input power Uin, a filter circuit, a three-phase rectifier bridge DB1, an IGBT tube Q1, an IGBT tube Q2, a harmonic current injection circuit, a tap inductor circuit, an output filter capacitor C4 and a load R1; the filter circuit comprises a filter inductor L1, a filter inductor L2, a filter inductor L3, a filter capacitor C1, a filter capacitor C2 and a filter capacitor C3; the harmonic current injection circuit comprises a diode D1, a diode D2, a diode D3, a diode D4, a diode D5, a diode D6, a diode D7, a diode D8, a diode D9, a diode D10, a diode D11, a diode D12, a power MOSFET Sy1, a power MOSFET Sy2 and a power MOSFET Sy 3; the tap inductor circuit comprises a tap inductor L1, a tap inductor L2 and a power MOSFET Sy 4.
Three input phase voltages of the three-phase alternating-current input power Uin are respectively connected with one end of a filter inductor L1, one end of a filter inductor L2 and one end of a filter inductor L3; the other end of the filter inductor L1 is connected to one end of the filter capacitor C1; the other end of the filter inductor L2 is connected to one end of the filter capacitor C2; the other end of the filter inductor L3 is connected to one end of the filter capacitor C3; the other ends of the filter capacitor C1, the filter capacitor C2 and the filter capacitor C3 are connected together.
Three input ends of the three-phase rectifier bridge DB1 are respectively connected to a common node of a filter inductor L1 and a filter capacitor C1, a common node of a filter inductor L2 and a filter capacitor C2, and a common node of a filter inductor L3 and a filter capacitor C3; the positive output end of the three-phase rectifier bridge DB1 is connected with one end of an IGBT tube Q1, and the negative output end of the three-phase rectifier bridge DB1 is connected with one end of an IGBT tube Q2; the other end of the IGBT tube Q1 is connected with the cathode of the diode D1, the cathode of the diode D3, the cathode of the diode D5 and one end of the winding n2 with the tapped inductor L1; the other end of the IGBT tube Q2 is connected with the anode of the diode D2, the anode of the diode D4, the anode of the diode D6 and one end of the winding n2 with the tapped inductor L2.
The anode of the diode D1 is connected to the anode of the diode D7 and the source of the power MOSFET Sy1, the anode of the diode D3 is connected to the anode of the diode D9 and the source of the power MOSFET Sy2, and the anode of the diode D5 is connected to the anode of the diode D11 and the source of the power MOSFET Sy 3; the cathode of the diode D2 is connected to the cathode of the diode D8 and the drain of the MOSFET transistor Sy1, the cathode of the diode D4 is connected to the cathode of the diode D10 and the drain of the MOSFET transistor Sy2, and the cathode of the diode D6 is connected to the cathode of the diode D12 and the drain of the MOSFET transistor Sy 3; three input ends of the three-phase rectifier bridge DB1 are respectively connected with a cathode of the diode D7 and an anode of the diode D8, a cathode of the diode D9 and an anode of the diode D10, and a cathode of the diode D11 and an anode of the diode D12.
The middle tap of the tapped inductor L1 is connected with the source electrode of a power MOSFET transistor Sy 4; one end of a winding n1 of the L1 with a tap inductor is connected with one end of an output filter capacitor C4 and one end of a load R1; the middle tap of the tapped inductor L2 is connected with the drain electrode of the power MOSFET transistor Sy 4; one end of a winding n1 of the tapped inductor L2 is connected with the other end of the output filter capacitor C4 and the other end of the load R1.
The invention relates to a large direct-current voltage gain buck three-phase power factor correction circuit, which has the following beneficial effects: the three-switch harmonic current injection circuit can effectively reduce the risk of interphase short circuit of the input power supply; the invention can obtain lower output voltage under the condition of the same duty ratio, and realize the large direct current voltage gain voltage reduction work; the invention can realize three-phase input current normalization without complex vector control by only adopting a DC/DC PWM control technology, and is easy to realize.
Drawings
Fig. 1 is a circuit diagram of an embodiment of the present invention.
Fig. 2 is a timing diagram of the driving signal of the switching tube and the three-phase input power source of the harmonic current injection circuit of the present invention.
Fig. 3 is an equivalent circuit diagram of the present invention operating in interval ①.
Fig. 4 is a simplified circuit diagram of fig. 3.
Fig. 5 is a current path diagram for phase 1 of the present invention operating in interval ①.
Fig. 6 is a current path diagram for phase 2 of the present invention operating in interval ①.
Fig. 7 is a current path diagram for phase 3 of the present invention operating in interval ①.
Fig. 8 is a phase 4 current path diagram of the present invention operating in interval ①.
Detailed Description
Fig. 1 shows a buck three-phase power factor correction circuit with large dc voltage gain, which includes a three-phase ac input power Uin, a filter circuit, a three-phase rectifier bridge DB1, an IGBT Q1, an IGBT Q2, a harmonic current injection circuit, a tap inductor circuit, an output filter capacitor C4, and a load R1; the filter circuit comprises a filter inductor L1, a filter inductor L2, a filter inductor L3, a filter capacitor C1, a filter capacitor C2 and a filter capacitor C3; the harmonic current injection circuit comprises a diode D1, a diode D2, a diode D3, a diode D4, a diode D5, a diode D6, a diode D7, a diode D8, a diode D9, a diode D10, a diode D11, a diode D12, a power MOSFET Sy1, a power MOSFET Sy2 and a power MOSFET Sy 3; the tap inductor circuit comprises a tap inductor L1, a tap inductor L2 and a power MOSFET Sy 4.
Three input phase voltages of the three-phase alternating-current input power Uin are respectively connected with one end of a filter inductor L1, one end of a filter inductor L2 and one end of a filter inductor L3; the other end of the filter inductor L1 is connected to one end of the filter capacitor C1; the other end of the filter inductor L2 is connected to one end of the filter capacitor C2; the other end of the filter inductor L3 is connected to one end of the filter capacitor C3; the other ends of the filter capacitor C1, the filter capacitor C2 and the filter capacitor C3 are connected together.
Three input ends of the three-phase rectifier bridge DB1 are respectively connected to a common node of a filter inductor L1 and a filter capacitor C1, a common node of a filter inductor L2 and a filter capacitor C2, and a common node of a filter inductor L3 and a filter capacitor C3; the positive output end of the three-phase rectifier bridge DB1 is connected with one end of an IGBT tube Q1, and the negative output end of the three-phase rectifier bridge DB1 is connected with one end of an IGBT tube Q2; the other end of the IGBT tube Q1 is connected with the cathode of the diode D1, the cathode of the diode D3, the cathode of the diode D5 and one end of the winding n2 with the tapped inductor L1; the other end of the IGBT tube Q2 is connected with the anode of the diode D2, the anode of the diode D4, the anode of the diode D6 and one end of the winding n2 with the tapped inductor L2.
The anode of the diode D1 is connected to the anode of the diode D7 and the source of the power MOSFET Sy1, the anode of the diode D3 is connected to the anode of the diode D9 and the source of the power MOSFET Sy2, and the anode of the diode D5 is connected to the anode of the diode D11 and the source of the power MOSFET Sy 3; the cathode of the diode D2 is connected to the cathode of the diode D8 and the drain of the MOSFET transistor Sy1, the cathode of the diode D4 is connected to the cathode of the diode D10 and the drain of the MOSFET transistor Sy2, and the cathode of the diode D6 is connected to the cathode of the diode D12 and the drain of the MOSFET transistor Sy 3; three input ends of the three-phase rectifier bridge DB1 are respectively connected with a cathode of the diode D7 and an anode of the diode D8, a cathode of the diode D9 and an anode of the diode D10, and a cathode of the diode D11 and an anode of the diode D12.
The middle tap of the tapped inductor L1 is connected with the source electrode of a power MOSFET transistor Sy 4; one end of a winding n1 of the L1 with a tap inductor is connected with one end of an output filter capacitor C4 and one end of a load R1; the middle tap of the tapped inductor L2 is connected with the drain electrode of the power MOSFET transistor Sy 4; one end of a winding n1 of the tapped inductor L2 is connected with the other end of the output filter capacitor C4 and the other end of the load R1.
Referring to fig. 2, a timing diagram of the driving signals of the switching tubes of the harmonic current injection circuit and the three-phase input power source of the present invention is shown, wherein the relationship between the control signals of the three switching tubes Sy1, Sy2, Sy3 in the harmonic injection network and the instantaneous values of the three-phase input voltage is that one ac power source cycle is divided into 6 intervals, each interval is 60 °, in each interval, the injection switching tube corresponding to the minimum absolute value of the three-phase input voltage operates, and the driving signals are synchronized with the driving signals with higher duty ratio in Q1, Q2, the following analysis takes an interval ① as an example to analyze the operation process of the circuit in detail, the interval c is the minimum absolute value of the phase voltage, the switching tube Sy3 in the harmonic injection circuit is in a switching state, and the Sy1, Sy2 are kept off.
According to fig. 3, the IGBT transistors Q1 and Q2 and the power MOSFET transistor Sy3 are in high-frequency switching operation, and a simplified equivalent circuit is shown in fig. 4, where arrows indicate the reference positive directions of the respective state variables. U in FIG. 4py、uynIs a segmented combination of line voltages of a three-phase alternating current input power supply.
As in fig. 5, stage 1: q1 and Q2 are turned on, Sy3 and Sy4 are turned off, and the voltage u is appliedpy+uyn=uabThe diodes D5, D6 are reverse biased off, and the tapped inductors L1, L2 are charged in series.
As in fig. 6, stage 2: q1 and Sy3 are turned on, Q2 and Sy4 are turned off, and the voltage u is appliedpy=uacThe diodes D6 and D11 are turned on, D5 is reversely biased to be turned off, and the tapped inductors L1 and L2 are charged in series.
As in fig. 7, stage 3: q2 and Sy3 are turned on, Q1 and Sy4 are turned off, and the voltage u is appliedyn=ucbThe diodes D5 and D12 are turned on, D6 is reversely biased to be turned off, and the tapped inductors L1 and L2 are charged in series.
As in fig. 8, stage 4: q1, Q2 and Sy3 are turned off, Sy4 is turned on, diodes D5 and D6 are reversely biased to be turned off, and a sub-coil with a tap inductor L1 and an L2 and a winding n1 carries out freewheeling discharge through Sy 4.
When the IGBT tube Q1 is conducted, the IGBT tube Q1 current iQ1=iL(ii) a When Q1 is turned off, iQ1= 0; the Q1 current i can be controlled by controlling the on-off of Q1Q1At this time iQ1=ip=iaTherefore, the on-off of the IGBT tube Q1 can be controlled to enable the iaTracking the a-phase voltage ua. Similarly, the on-off of the IGBT tube Q2 can be controlled to enable ibTracking the b-phase voltage ub. According to KCL, in three-phase symmetry, if ia、ibTracking respective phase voltages ua、ubThen i iscAlso tracking the phase voltage ucThus, the tracking of the three-phase input voltage by the three-phase input current is realized.
The operation of the other intervals is similar to the operation of the interval ①, and the three-phase input current tracks the three-phase input voltage from a complete power cycle, thereby achieving three-phase power factor correction.
The above description is only a circuit structure diagram of the buck three-phase power factor correction circuit with large dc voltage gain, and it will be obvious to those skilled in the art that the circuit structure may be changed or replaced equivalently without departing from the principle of the present invention, and the circuit topology structure that is changed or replaced equivalently is within the protection scope of the present invention.

Claims (5)

1. A big direct current voltage gain's step-down three-phase power factor correction circuit which characterized in that: the three-phase alternating current power supply device comprises a three-phase alternating current input power supply Uin, a filter circuit, a three-phase rectifier bridge DB1, an IGBT tube Q1, an IGBT tube Q2, a harmonic current injection circuit, a tap inductor circuit, an output filter capacitor C4 and a load R1; the filter circuit comprises a filter inductor L1, a filter inductor L2, a filter inductor L3, a filter capacitor C1, a filter capacitor C2 and a filter capacitor C3; the harmonic current injection circuit comprises a diode D1, a diode D2, a diode D3, a diode D4, a diode D5, a diode D6, a diode D7, a diode D8, a diode D9, a diode D10, a diode D11, a diode D12, a power MOSFET Sy1, a power MOSFET Sy2 and a power MOSFET Sy 3; the tap inductor circuit comprises a tap inductor L1, a tap inductor L2 and a power MOSFET Sy 4.
2. The buck three-phase power factor correction circuit with large dc voltage gain of claim 1, wherein: three input phase voltages of the three-phase alternating-current input power Uin are respectively connected with one end of a filter inductor L1, one end of a filter inductor L2 and one end of a filter inductor L3; the other end of the filter inductor L1 is connected to one end of the filter capacitor C1; the other end of the filter inductor L2 is connected to one end of the filter capacitor C2; the other end of the filter inductor L3 is connected to one end of the filter capacitor C3; the other ends of the filter capacitor C1, the filter capacitor C2 and the filter capacitor C3 are connected together.
3. The buck three-phase power factor correction circuit with large dc voltage gain of claim 1, wherein: three input ends of the three-phase rectifier bridge DB1 are respectively connected to a common node of a filter inductor L1 and a filter capacitor C1, a common node of a filter inductor L2 and a filter capacitor C2, and a common node of a filter inductor L3 and a filter capacitor C3; the positive output end of the three-phase rectifier bridge DB1 is connected with one end of an IGBT tube Q1, and the negative output end of the three-phase rectifier bridge DB1 is connected with one end of an IGBT tube Q2; the other end of the IGBT tube Q1 is connected with the cathode of the diode D1, the cathode of the diode D3, the cathode of the diode D5 and one end of the winding n2 with the tapped inductor L1; the other end of the IGBT tube Q2 is connected with the anode of the diode D2, the anode of the diode D4, the anode of the diode D6 and one end of the winding n2 with the tapped inductor L2.
4. The buck three-phase power factor correction circuit with large dc voltage gain of claim 1, wherein: the anode of the diode D1 is connected to the anode of the diode D7 and the source of the power MOSFET Sy1, the anode of the diode D3 is connected to the anode of the diode D9 and the source of the power MOSFET Sy2, and the anode of the diode D5 is connected to the anode of the diode D11 and the source of the power MOSFET Sy 3; the cathode of the diode D2 is connected to the cathode of the diode D8 and the drain of the MOSFET transistor Sy1, the cathode of the diode D4 is connected to the cathode of the diode D10 and the drain of the MOSFET transistor Sy2, and the cathode of the diode D6 is connected to the cathode of the diode D12 and the drain of the MOSFET transistor Sy 3; three input ends of the three-phase rectifier bridge DB1 are respectively connected with a cathode of the diode D7 and an anode of the diode D8, a cathode of the diode D9 and an anode of the diode D10, and a cathode of the diode D11 and an anode of the diode D12.
5. The buck three-phase power factor correction circuit with large dc voltage gain of claim 1, wherein: the middle tap of the tapped inductor L1 is connected with the source electrode of a power MOSFET transistor Sy 4; one end of a winding n1 of the L1 with a tap inductor is connected with one end of an output filter capacitor C4 and one end of a load R1; the middle tap of the tapped inductor L2 is connected with the drain electrode of the power MOSFET transistor Sy 4; one end of a winding n1 of the tapped inductor L2 is connected with the other end of the output filter capacitor C4 and the other end of the load R1.
CN201911220339.1A 2019-12-03 2019-12-03 Buck three-phase power factor correction circuit with large direct-current voltage gain Pending CN110829826A (en)

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CN201911220339.1A CN110829826A (en) 2019-12-03 2019-12-03 Buck three-phase power factor correction circuit with large direct-current voltage gain

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Application Number Priority Date Filing Date Title
CN201911220339.1A CN110829826A (en) 2019-12-03 2019-12-03 Buck three-phase power factor correction circuit with large direct-current voltage gain

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105471252A (en) * 2016-01-05 2016-04-06 福州大学 Harmonic-current injection type three-phase power factor correction circuit with high voltage-reduction transformation ratio
CN105553249A (en) * 2016-01-05 2016-05-04 福州大学 Current injection type three-phase power factor correction circuit having wide voltage range and low voltage stress
CN109039050A (en) * 2018-08-30 2018-12-18 国网福建省电力有限公司 A kind of source voltage-type Trans-Z active power factor correction circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105471252A (en) * 2016-01-05 2016-04-06 福州大学 Harmonic-current injection type three-phase power factor correction circuit with high voltage-reduction transformation ratio
CN105553249A (en) * 2016-01-05 2016-05-04 福州大学 Current injection type three-phase power factor correction circuit having wide voltage range and low voltage stress
CN109039050A (en) * 2018-08-30 2018-12-18 国网福建省电力有限公司 A kind of source voltage-type Trans-Z active power factor correction circuit

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Application publication date: 20200221