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A three-switch tube single-phase three-level rectifier

A three-level rectification, switching tube technology, applied in electrical components, high-efficiency power electronic conversion, conversion of AC power input to DC power output, etc., can solve problems such as switching loss, reduce switching loss, reduce fault loss, Low common mode interference

Active Publication Date: 2022-05-20
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The power semiconductors in conventional two-level rectifiers typically sustain and rectify the entire DC-link voltage, thus incurring significant switching losses

Method used

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  • A three-switch tube single-phase three-level rectifier
  • A three-switch tube single-phase three-level rectifier
  • A three-switch tube single-phase three-level rectifier

Examples

Experimental program
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Effect test

Embodiment Construction

[0043] Such as figure 1 As shown, a three-switch tube single-phase three-level rectifier based on pseudo-totem pole type, the rectifier includes: switch tube S 1 , S 2 , S 3 , Diode D 1 ~D 8 , inductance L 1 , L2 , capacitance C 1 、C 2 ;

[0044] Inductance L 2 with diode D 2 Cathode and S 2 The source is connected, and its connection node forms node b;

[0045] AC power U g The other side with diode D 5 Anode and D 6 The cathodes are connected, and the connected nodes form node N;

[0046] Switch tube S 2 drain and capacitance C 1 The positive poles are connected, and the connected nodes form node p;

[0047] Diode D 2 、D 4 Anode, switch tube S 1 source and capacitor C 2 The negative pole is connected to point m;

[0048] Diode D 7 Anode, D 8 Cathode and Split Capacitor C 1 Negative pole, C 2 The positive poles are connected, and the connected nodes form node n;

[0049] Switch tube S 3 Drain and Diode D 5 、D 7 Cathode connected, S 3 source and ...

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Abstract

A three-switch tube single-phase three-level rectifier, including three fully-controlled power switch tubes S 1 , S 2 , S 3 , AC power U g , inductance L 1 , L 2 ; AC power supply U g one side with a shunt inductor L 1 , L 2 connected, the inductance L 1 Switch tube S 1 drain and D 1 Anode connection, forming node a; inductance L 2 with diode D 2 Cathode and S 2 source, forming node b; AC power U g The other side with diode D 5 Anode and D 6 The cathodes are connected to form node N; diode D 1 、D 3 Cathode, switch tube S 2 drain and capacitance C 1 Anode connected to node p; diode D 2 、D 4 Anode, switch tube S 1 source and capacitance C 2 The cathode is connected to the node m; the diode D 7 Anode, D 8 Cathode and Split Capacitor C 1 、C 2 connected to node n. The novel single-phase rectifier of the present invention uses a small number of switching tubes and has a three-level structure, and has the advantages of relatively simple control, low voltage stress of the switching tubes, and the like.

Description

technical field [0001] The invention relates to power conversion and single-phase active three-level rectifier topology, in particular to a three-switch tube single-phase three-level rectifier based on a pseudo-totem pole type. Background technique [0002] Traditional two-level rectifiers have been used in factories for decades, but they have been replaced by emerging multilevel converters. The power semiconductor devices in a conventional two-level rectifier typically sustain and rectify the entire DC-link voltage, thus incurring significant switching losses. To improve this characteristic and allow the use of higher switching frequencies, multilevel rectifiers can be used to build rectifier topologies. Due to the advantages of low switching frequency, low harmonic distortion and high power density, multilevel converters have been widely used in various industries in recent years. Under the same conditions, using a three-level structure to design a power factor correctio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/219H02M7/797H02M1/42H02M1/44H02M1/32
CPCH02M7/219H02M7/797H02M1/4225H02M1/4233H02M1/44H02M1/32Y02B70/10
Inventor 马辉敬成徐甜川刘昊邦
Owner CHINA THREE GORGES UNIV
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