CN112865569A - Single-phase three-level rectifier of mixed T-shaped bridge - Google Patents

Single-phase three-level rectifier of mixed T-shaped bridge Download PDF

Info

Publication number
CN112865569A
CN112865569A CN202110121188.5A CN202110121188A CN112865569A CN 112865569 A CN112865569 A CN 112865569A CN 202110121188 A CN202110121188 A CN 202110121188A CN 112865569 A CN112865569 A CN 112865569A
Authority
CN
China
Prior art keywords
diode
switch tube
power
voltage
power supply
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.)
Pending
Application number
CN202110121188.5A
Other languages
Chinese (zh)
Inventor
马辉
邹旭
徐甜川
敬成
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.)
China Three Gorges University CTGU
Original Assignee
China Three Gorges University CTGU
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 China Three Gorges University CTGU filed Critical China Three Gorges University CTGU
Priority to CN202110121188.5A priority Critical patent/CN112865569A/en
Publication of CN112865569A publication Critical patent/CN112865569A/en
Pending legal-status Critical Current

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
    • 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
    • H02M7/219—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 bridge configuration
    • 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
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H02M1/4233—Arrangements for improving power factor of AC input using a bridge converter comprising active switches
    • 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
    • H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
    • 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
    • H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
    • H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
    • H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/79—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with 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
    • H02M7/797—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Rectifiers (AREA)

Abstract

A single-phase three-level rectifier of mixed T-shaped bridge comprises two groups of T-shaped bridges and two split capacitors C1、C2. Wherein, three bridge arms of two groups of T-shaped bridges are respectively composed of two diodes and a group of bidirectional power tubes, the first T-shaped bridge comprises a diode D1、D2、D5、D6、D7、D8Power switch tube S1Diode D5、D6、D7、D8And a power switch tube S1Form a group of bidirectional power tubes. The second T-bridge comprising a diode D3、D4Power switch tube S2、S3Power switch tube S2、S3Form a group of bidirectional power tubes. The single-phase three-level rectifier of the hybrid T-shaped bridge reduces the harmonic content in a power grid and greatly improves the power factor of equipment.

Description

Single-phase three-level rectifier of mixed T-shaped bridge
Technical Field
The invention relates to a three-level rectifier, in particular to a single-phase three-level rectifier of a hybrid T-shaped bridge.
Background
With the rapid development of power electronic technology, a new topology structure of the power converter is urgently needed in the field of power conversion, so that the voltage level and the power factor are improved, and the power loss and the hardware cost are reduced. A boost chopper circuit is introduced between an uncontrolled rectifying circuit and a filter capacitor in a traditional two-level rectifier. When the grid voltage is lower than the load voltage, the rectifier can cause large fluctuation of the grid current, and a large amount of harmonic waves are injected into the grid. Meanwhile, in the rectification process, the current of the power grid cannot change along with the voltage, so that the power factor of the equipment in the mode is greatly reduced. Meanwhile, the traditional two-level rectifier is not suitable for high-voltage and large-capacity power application occasions due to the withstand voltage grade of the power electronic device and the large bus voltage value distributed to each power electronic device by the rectifier.
Disclosure of Invention
Compared with the traditional two-level rectifier, the single-phase three-level rectifier of the hybrid T-shaped bridge provided by the invention has the advantages that the diode D is used5、D6、D7、D8And a power switch tube S1The bidirectional power tube is inserted between the terminal a and the terminal b and is an inductor L1Charging to form a loop, and realizing direct-current side boosting; the circuit can be suitable for application occasions with high voltage and large capacity, and meanwhile, the mode of continuous work of the inductive current enables the power grid current to follow the power grid voltage, so that the harmonic content in the power grid is reduced, and the power factor of the equipment is greatly improved.
The technical scheme adopted by the invention is as follows:
a single phase three level rectifier of a hybrid T-bridge, the rectifier comprising:
two T-shaped bridges and a capacitor C1、C2(ii) a Three bridge arms of the two T-shaped bridges are respectively composed of two diodes and a group of bidirectional power tubes;
the first T-bridge comprising a diode D1、D2、D5、D6、D7、D8Switch, switchPipe S1Diode D5、D6、D7、D8And a switching tube S1Forming a group of bidirectional power tubes;
the second T-bridge comprising a diode D3、D4Switching tube S2、S3Switching tube S2、S3Forming a group of bidirectional power tubes; the connection relationship is as follows:
inductor L1The other ends are respectively connected with a diode D1Anode, diode D5Anode, diode D6Cathode, diode D2A cathode, the connection node of which constitutes an end a;
one end of the AC power supply is respectively connected with a diode D4Cathode, diode D7Anode, diode D8Cathode, diode D3The anode and the source of the switching tube S2, and the connection node of the anode and the source forms an endpoint b;
diode D1The cathodes are respectively connected with a diode D3Cathode and capacitor C1One end, the connection node of which constitutes an endpoint p;
diode D2The anodes are respectively connected with a diode D4Anode and capacitor C2The other end is connected with the node to form an end point m;
capacitor C2One end is respectively connected with a capacitor C1The other end of the switch tube S3 is connected with the source electrode of the switch tube S3, and the connection node of the switch tube S3 forms an end point n;
switch tube S1The drain electrodes are respectively connected with a diode D5Cathode, diode D7A cathode;
switch tube S1The source electrodes are respectively connected with a diode D6Anode, diode D8An anode;
switch tube S2The drain electrode is connected with a switch tube S3A drain electrode;
the other end of the AC power supply is connected with an inductor L1One end;
load RLTwo ends are respectively connected with a capacitor C1One terminal, capacitor C2And the other end.
By a diode D5、D6、D7、D8And a switching tube S1The bidirectional power tube is inserted between the terminal a and the terminal b and is an inductor L1The charging forms a loop to realize the direct current side boosting.
By a switching tube S2、S3A group of bidirectional power tubes inserted between the terminal b and the terminal n and composed of two capacitors C1、C2The charging forms a loop to realize the neutral point potential balance.
The switch tube S1、S2Is an insulated gate bipolar transistor IGBT, or an integrated gate commutated thyristor IGCT, or a power field effect transistor MOSFET.
The invention discloses a single-phase three-level rectifier of a hybrid T-shaped bridge, which has the following technical effects:
1) the single-phase three-level rectifier of the hybrid T-shaped bridge can realize an inductive current continuous mode, has a function of power factor correction, and plays a certain role in reducing the electromagnetic interference of a power supply;
2) the single-phase three-level rectifier of the hybrid T-shaped bridge adopts different combination modes of the power switching tubes to realize three levels, and even if the bidirectional tube is in a fault state, the circuit can still realize the power output to the direct current side;
3) the single-phase three-level rectifier of the hybrid T-shaped bridge has the advantages of low voltage stress of a power switching tube, low loss of power electronic devices, low harmonic content and the like.
Drawings
Fig. 1 is a main topology structure diagram of a single-phase three-level rectifier of a hybrid T-bridge according to the present invention.
Fig. 2 is a schematic diagram of a working mode of a single-phase three-level rectifier of a hybrid T-bridge according to the present invention.
Fig. 3 is a schematic diagram of a second working mode of the single-phase three-level rectifier of the hybrid T-bridge of the present invention.
Fig. 4 is a three-schematic diagram of the working mode of a single-phase three-level rectifier of a hybrid T-bridge according to the present invention.
Fig. 5 is a diagram illustrating a four-mode operation of a single-phase three-level rectifier of a hybrid T-bridge according to the present invention.
Fig. 6 is a five schematic diagram of the working mode of a single-phase three-level rectifier of a hybrid T-bridge according to the present invention.
Fig. 7 is a six schematic diagram of the working mode of a single-phase three-level rectifier of a hybrid T-bridge according to the present invention.
FIG. 8 shows an AC supply voltage U of a single-phase three-level rectifier of a hybrid T-bridge according to the present inventionSAnd alternating supply current iSAnd (4) waveform diagrams.
FIG. 9 shows a voltage U between a terminal a and a terminal b of a single-phase three-level rectifier of a hybrid T-bridge according to the present inventionabAnd (4) waveform diagrams.
FIG. 10 shows a DC side voltage U of a single-phase three-level rectifier of a hybrid T-bridge according to the present inventiondcAnd (4) waveform diagrams.
FIG. 11 shows a DC-side two-split capacitor C of a single-phase three-level rectifier of a hybrid T-bridge according to the present invention1、C2Voltage U onc1、Uc2And (4) waveform diagrams.
Detailed Description
As shown in FIG. 1, a single-phase three-level rectifier of a hybrid T-bridge comprises two sets of T-bridges and two split capacitors C1、C2. Wherein, three bridge arms of the two groups of T-shaped bridges are respectively composed of two diodes and a group of bidirectional power tubes. The first T-bridge comprising a diode D1、D2、D5、D6、D7、D8Power switch tube S1Diode D5、D6、D7、D8And a power switch tube S1Form a group of bidirectional power tubes. The second T-bridge comprising a diode D3、D4Power switch tube S2、S3Power switch tube S2、S3Form a group of bidirectional power tubes. Diode D1、D5Anode of (2), diode D2、D6Cathode and inductor L1Connecting, and regarding the connecting point as an end point a; diode D3、D7Anode of (2), diode D4、D8The cathode of the power switch tube S2 and the source of the power switch tube S2 are connected with one end of an alternating current power supply AC, and the connection point is regarded as an end point b; diode D1、D3Of a cathodeAnd a split capacitor C1The positive electrodes of the two electrodes are connected, and the connection point is regarded as an end point p; source electrode of power switch tube S3, split capacitor C1Negative electrode and split capacitor C2The positive electrodes of the two electrodes are connected, and the connection point is regarded as an end point n; diode D2、D4Anode and split capacitor C2The negative electrodes of the two electrodes are connected, and the connection point is regarded as an end point m; diode D5、D7Cathode and power switch tube S1Is connected to the drain of the diode D6、D8Anode and power switch tube S1Is connected with the source electrode of the power switch tube S2Drain electrode of (1) and power switch tube S3Is connected with the drain electrode of the inductor L, and the other end of the alternating current power supply AC is connected with the inductor L1Connected to a load RLConnected between the end points p, m.
USIs an AC supply voltage iSFor alternating supply current, UabIs the voltage between terminal a and terminal b, UdcIs a DC side voltage, Uc1And Uc2Respectively a DC side split capacitor C1、C2Voltage on, splitting capacitance C1、C2Not only stabilizes the DC side voltage, but also stores the electric energy and sends the electric energy to the load RLProviding energy.
The specific parameters of the circuit are as follows: the effective value of the AC power supply voltage is 220V, the frequency is 50Hz, and the DC side output voltage Udc400V, inductance L12mH, split capacitance C1＝C24700 μ F, switching frequency fs 20kHz, load RL＝50Ω。
A single-phase three-level rectifier of a hybrid T-type bridge divides the whole power frequency working period into six working modes according to a carrier-wave laminated Pulse Width Modulation (PWM):
the first working mode is as follows: as shown in fig. 2, the diode D operates in the positive half cycle of the AC power source AC1、D4Conducting power switch tube S1、S2、S3And (5) disconnecting. The current starts from the AC power supply AC and passes through the inductor L1Diode D1, split capacitor C1、C2Diode D4And finally back to the AC power source AC. At this pointIn one mode of operation, the voltage U between the terminal a and the terminal babEqual to the DC side voltage UdcSplitting capacitance C1、C2Charging, AC power supply AC and inductance L1Together to a load RLSupplying power, and linearly reducing the inductive current;
the second working mode is as follows: as shown in fig. 3, the diode D operates in the positive half cycle of the AC power source AC1Conducting power switch tube S2Conducting power switch tube S1、S3And (5) disconnecting. The current starts from the AC power supply AC and passes through the inductor L1Diode D1Split capacitor C1Power switch tube S3Body diode and power switch tube S2And finally back to the AC power source AC. In this mode of operation, the voltage U between the terminals a and babEqual to the DC side voltage UdcHalf of (1), split capacitance C1Charging, splitting capacitance C2Discharging if the AC supply voltage Us is higher than UdcAt/2, in this state, the inductance L1The current rises linearly if the AC supply voltage Us is less than UdcAt/2, in this state, the inductance L1The current decreases linearly;
the working mode is three: as shown in fig. 4, the diode D operates in the positive half cycle of the AC power source AC5、D8Conducting power switch tube S1Conducting power switch tube S2、S3And (5) disconnecting. The current starts from the AC power supply AC and passes through the inductor L1Diode D5Power switch tube S1Diode D8And finally back to the AC power source AC. In this mode of operation, the voltage U between the terminals a and babEqual to zero, split capacitance C1、C2Discharging to a load RLCharging, AC power supply gives inductance L1Charging;
working mode four: as shown in fig. 5, the diode D operates in the negative half cycle of the AC power source AC6、D7Conducting power switch tube S1Conducting power switch tube S2、S3Is disconnected and current flows from the AC power supply AC through the diode D7"Gong" exerciseRate switching tube S1Diode D6Inductor L1And finally back to the AC power source AC. In this mode of operation, the voltage U between the terminals a and babEqual to zero, split capacitance C1、C2Discharging to a load RLCharging, AC power supply gives inductance L1And (6) charging.
Working mode five: as shown in fig. 6, the power switch S operates in the negative half cycle of the AC power source AC3Conducting power switch tube S1、S2Cut off, the current from AC source passes through S of power switch tube2Body diode, S of power switch tube3Split capacitor C2Diode D2Inductor L1And finally back to the AC power source AC. In this mode of operation, the voltage U between the terminals a and babEqual to negative DC side voltage UdcHalf of (1), split capacitance C1Discharge, splitting capacitance C2Charging, if the absolute value of the AC supply voltage Us is higher than UdcAt/2, in this state, the inductance L1The current rises linearly; if the absolute value of the AC supply voltage Us is less than UdcAt/2, in this state, the inductance L1The current decreases linearly;
the working mode is six: as shown in fig. 7, the diode D operates in the negative half cycle of the AC power source AC2、D3Conducting power switch tube S1、S2、S3Is disconnected and current flows from the AC power supply AC through the diode D3Split capacitor C1、C2Diode D2Inductor L1And finally back to the AC power source AC. In this mode of operation, the voltage U between the terminals a and babEqual to negative DC side voltage UdcSplitting capacitance C1、C2Charging, AC power supply AC and inductance L1Together to a load RLWhen power is supplied, the inductive current is linearly reduced.
FIG. 8 shows an AC supply voltage U of a single-phase three-level rectifier of a hybrid T-bridge according to the present inventionSAnd alternating supply current iSWaveform diagram, network side voltage and current are the same frequencyThe phase, namely the unit power factor is realized, proves the feasibility of the topology.
FIG. 9 shows a voltage U between terminals a and b of a single-phase three-level rectifier of a hybrid T-bridge according to the present inventionabThe oscillogram accords with the working characteristics of the three-level circuit and is consistent with theoretical analysis.
FIG. 10 shows a DC side voltage U of a single-phase three-level rectifier of a hybrid T-bridge according to the present inventiondcThe waveform diagram shows that the voltage on the direct current side is stabilized to be about 400V, and the feasibility of the topology is proved.
FIG. 11 shows a DC-side two-split capacitor C of a single-phase three-level rectifier of a hybrid T-bridge according to the present invention1、C2Voltage U onc1、Uc2The waveform diagram and the voltage waveform of the two split capacitors are dynamically balanced, and the topology is proved to effectively realize midpoint potential balance.

Claims (5)

1. A single phase three level rectifier for a hybrid T-bridge, the rectifier comprising:
two T-shaped bridges and a capacitor C1、C2；
The first T-bridge comprising a diode D1、D2、D5、D6、D7、D8Switching tube S1Diode D5、D6、D7、D8And a switching tube S1Forming a group of bidirectional power tubes;
the second T-bridge comprising a diode D3、D4Switching tube S2、S3Switching tube S2、S3Forming a group of bidirectional power tubes;
the connection relationship is as follows:
inductor L1The other ends are respectively connected with a diode D1Anode, diode D5Anode, diode D6Cathode, diode D2A cathode, the connection node of which constitutes an end a;
one end of the AC power supply is respectively connected with a diode D4Cathode, diode D7Anode, diode D8Cathode, diode D3The anode and the source of the switching tube S2, and the connection node of the anode and the source forms an endpoint b;
diode D1The cathodes are respectively connected with a diode D3Cathode and capacitor C1One end, the connection node of which constitutes an endpoint p;
diode D2The anodes are respectively connected with a diode D4Anode and capacitor C2The other end is connected with the node to form an end point m;
capacitor C2One end is respectively connected with a capacitor C1The other end of the switch tube S3 is connected with the source electrode of the switch tube S3, and the connection node of the switch tube S3 forms an end point n;
switch tube S1The drain electrodes are respectively connected with a diode D5Cathode, diode D7A cathode;
switch tube S1The source electrodes are respectively connected with a diode D6Anode, diode D8An anode;
switch tube S2The drain electrode is connected with a switch tube S3A drain electrode;
the other end of the AC power supply is connected with an inductor L1One end;
load RLTwo ends are respectively connected with a capacitor C1One terminal, capacitor C2And the other end.
2. A single phase three level rectifier of a hybrid T-bridge as claimed in claim 1, wherein: by a diode D5、D6、D7、D8And a switching tube S1The bidirectional power tube is inserted between the terminal a and the terminal b and is an inductor L1The charging forms a loop to realize the direct current side boosting.
3. A single phase three level rectifier of a hybrid T-bridge as claimed in claim 1, wherein: by a switching tube S2、S3A group of bidirectional power tubes inserted between the terminal b and the terminal n and composed of two capacitors C1、C2The charging forms a loop to realize the neutral point potential balance.
4. According to claim 1Single-phase three-level rectifier of mixed T type bridge, its characterized in that: the switch tube S1、S2Is an insulated gate bipolar transistor IGBT, or an integrated gate commutated thyristor IGCT, or a power field effect transistor MOSFET.
5. The single-phase three-level rectifier of any one of the hybrid T-bridges of claims 1-4, wherein:
according to a carrier stacking pulse width modulation strategy, the whole power frequency working period is divided into six working modes:
the first working mode is as follows: diode D operating in the positive half-cycle of the AC supply1、D4Conducting power switch tube S1、S2、S3Disconnecting; the current starts from the AC power supply AC and passes through the inductor L1Diode D1, split capacitor C1、C2Diode D4And finally back to the alternating current power supply AC; in this mode of operation, the voltage U between the terminals a and babEqual to the DC side voltage UdcSplitting capacitance C1、C2Charging, AC power supply AC and inductance L1Together to a load RLSupplying power, and linearly reducing the inductive current;
the second working mode is as follows: diode D operating in the positive half-cycle of the AC supply1Conducting power switch tube S2Conducting power switch tube S1、S3Disconnecting; the current starts from the AC power supply AC and passes through the inductor L1Diode D1Split capacitor C1Power switch tube S3Body diode and power switch tube S2And finally back to the alternating current power supply AC; in this mode of operation, the voltage U between the terminals a and babEqual to the DC side voltage UdcHalf of (1), split capacitance C1Charging, splitting capacitance C2Discharging if the AC supply voltage Us is higher than UdcAt/2, in this state, the inductance L1The current rises linearly if the AC supply voltage Us is less than UdcAt/2, in this state, the inductance L1The current decreases linearly;
the working mode is three: diode D operating in the positive half-cycle of the AC supply5、D8Conducting power switch tube S1Conducting power switch tube S2、S3Disconnecting; the current starts from the AC power supply AC and passes through the inductor L1Diode D5Power switch tube S1Diode D8And finally back to the alternating current power supply AC; in this mode of operation, the voltage U between the terminals a and babEqual to zero, split capacitance C1、C2Discharging to a load RLCharging, AC power supply gives inductance L1Charging;
working mode four: diode D operating in the negative half-cycle of the AC supply6、D7Conducting power switch tube S1Conducting power switch tube S2、S3Is disconnected and current flows from the AC power supply AC through the diode D7Power switch tube S1Diode D6Inductor L1And finally back to the alternating current power supply AC; in this mode of operation, the voltage U between the terminals a and babEqual to zero, split capacitance C1、C2Discharging to a load RLCharging, AC power supply gives inductance L1Charging;
working mode five: working in the negative half-cycle of the AC supply, power switch tube S3Conducting power switch tube S1、S2Cut off, the current from AC source passes through S of power switch tube2Body diode, S of power switch tube3Split capacitor C2Diode D2Inductor L1And finally back to the alternating current power supply AC; in this mode of operation, the voltage U between the terminals a and babEqual to negative DC side voltage UdcHalf of (1), split capacitance C1Discharge, splitting capacitance C2Charging, if the absolute value of the AC supply voltage Us is higher than UdcAt/2, in this state, the inductance L1The current rises linearly; if the absolute value of the AC supply voltage Us is less than UdcAt/2, in this state, the inductance L1The current decreases linearly;
the working mode is six: diode D operating in the negative half-cycle of the AC supply2、D3Conducting power switch tube S1、S2、S3Is disconnected and current flows from the AC power supply AC through the diode D3Split capacitor C1、C2Diode D2Inductor L1And finally back to the alternating current power supply AC; in this mode of operation, the voltage U between the terminals a and babEqual to negative DC side voltage UdcSplitting capacitance C1、C2Charging, AC power supply AC and inductance L1Together to a load RLWhen power is supplied, the inductive current is linearly reduced.
CN202110121188.5A 2021-01-28 2021-01-28 Single-phase three-level rectifier of mixed T-shaped bridge Pending CN112865569A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110121188.5A CN112865569A (en) 2021-01-28 2021-01-28 Single-phase three-level rectifier of mixed T-shaped bridge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110121188.5A CN112865569A (en) 2021-01-28 2021-01-28 Single-phase three-level rectifier of mixed T-shaped bridge

Publications (1)

Publication Number Publication Date
CN112865569A true CN112865569A (en) 2021-05-28

Family

ID=75986745

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110121188.5A Pending CN112865569A (en) 2021-01-28 2021-01-28 Single-phase three-level rectifier of mixed T-shaped bridge

Country Status (1)

Country Link
CN (1) CN112865569A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113437887A (en) * 2021-06-28 2021-09-24 三峡大学 Three-level rectifier based on multi-diode series bidirectional switch
CN113437882A (en) * 2021-06-28 2021-09-24 三峡大学 Three-level rectifier based on parallel multi-diode series bidirectional switch
CN113437884A (en) * 2021-06-28 2021-09-24 三峡大学 Three-level rectifier based on parallel diode clamping bidirectional switch
CN114204798A (en) * 2021-12-15 2022-03-18 杭州优特电源有限公司 Bridgeless power factor correction control circuit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106505894A (en) * 2016-11-01 2017-03-15 中国矿业大学 A kind of improved three level converter topologies and its modulator approach
WO2018032893A1 (en) * 2016-08-18 2018-02-22 中国电力科学研究院 Arcless on-load automatic voltage-regulating distribution transformer device and voltage regulation method thereof
WO2018141283A1 (en) * 2017-02-04 2018-08-09 中兴通讯股份有限公司 Bridge-free pfc circuit
CN111756257A (en) * 2020-06-16 2020-10-09 三峡大学 Double-boost three-level rectifier based on three switching tubes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018032893A1 (en) * 2016-08-18 2018-02-22 中国电力科学研究院 Arcless on-load automatic voltage-regulating distribution transformer device and voltage regulation method thereof
CN106505894A (en) * 2016-11-01 2017-03-15 中国矿业大学 A kind of improved three level converter topologies and its modulator approach
WO2018141283A1 (en) * 2017-02-04 2018-08-09 中兴通讯股份有限公司 Bridge-free pfc circuit
CN111756257A (en) * 2020-06-16 2020-10-09 三峡大学 Double-boost three-level rectifier based on three switching tubes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
LONG HUANG ET AL: "Flexible Mode Bridgeless Boost PFC Rectifier With High Efficiency Over a Wide Range of Input Voltage", 《IEEE TRANSACTIONS ON POWER ELECTRONICS》 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113437887A (en) * 2021-06-28 2021-09-24 三峡大学 Three-level rectifier based on multi-diode series bidirectional switch
CN113437882A (en) * 2021-06-28 2021-09-24 三峡大学 Three-level rectifier based on parallel multi-diode series bidirectional switch
CN113437884A (en) * 2021-06-28 2021-09-24 三峡大学 Three-level rectifier based on parallel diode clamping bidirectional switch
CN113437884B (en) * 2021-06-28 2023-12-19 三峡大学 Three-level rectifier based on parallel diode clamp bidirectional switch
CN113437882B (en) * 2021-06-28 2024-02-13 三峡大学 Three-level rectifier based on parallel multi-diode serial bidirectional switch
CN114204798A (en) * 2021-12-15 2022-03-18 杭州优特电源有限公司 Bridgeless power factor correction control circuit
CN114204798B (en) * 2021-12-15 2023-12-22 杭州优特电源有限公司 Bridgeless power factor correction circuit

Similar Documents

Publication Publication Date Title
CN112865569A (en) Single-phase three-level rectifier of mixed T-shaped bridge
CN111416534B (en) Current path reconstruction type single-phase five-level rectifier
CN112910244B (en) Single-phase three-level power factor correction circuit of hybrid bridge arm
CN112865587B (en) Single-phase three-level rectifier of double-barrelled T type bridge
CN111416535A (en) Three-mode mixed single-phase five-level rectifier
CN111082680A (en) Single-phase five-level rectifier based on T-shaped structure
CN112865560A (en) Multi-diode series back-to-back bridgeless three-level rectifier
CN112865565A (en) Double-switch three-level rectifier of symmetrical T-shaped bridge
CN102769394B (en) Single-phase controllable rectification circuit
CN113437884B (en) Three-level rectifier based on parallel diode clamp bidirectional switch
CN113437882B (en) Three-level rectifier based on parallel multi-diode serial bidirectional switch
CN112865508A (en) Single-phase three-level power factor correction circuit of novel asymmetric T-shaped bridge
CN112865563B (en) Three-port clamping type back-to-back bridgeless three-level rectifier
CN113193768B (en) Four-switch-tube series-type back-to-back three-level rectifier
CN112865561B (en) Diode clamping type back-to-back bridgeless three-level rectifier
CN112865562B (en) Single-phase three-switch tube pseudo-totem-pole type three-level rectifier
CN116613981A (en) Power factor correction and DC-DC multiplexing converter and uninterruptible power supply comprising same
CN112701905A (en) Single-phase three-level power factor correction circuit based on pseudo totem-pole structure
CN113206601B (en) Direct current charger based on single-phase II type three-level pseudo totem pole
CN113271023B (en) Back-to-back type three-level rectifier of heterogeneous hybrid bridge arm
CN112865566B (en) Single-phase three-level rectifier with three switching tubes
CN112910243B (en) Single-phase three-level pseudo-totem-pole power factor correction circuit
CN114884338A (en) Voltage type three-level power factor correction circuit
CN112187071B (en) DC side capacitor cascade single-phase seven-level rectifier
CN111416533B (en) Single-phase five-level rectifier based on four-port plug-in

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
RJ01 Rejection of invention patent application after publication

Application publication date: 20210528

RJ01 Rejection of invention patent application after publication