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Heterogeneous diode clamping type three-level rectifier

A technology of diode clamping and three-level rectification, which is applied in the direction of electrical components, high-efficiency power electronic conversion, output power conversion devices, etc., to achieve the effects of reducing input current ripple, small voltage stress, and prolonging service life

Active Publication Date: 2021-05-28
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The switching loss of the switching tube in the traditional two-level converter is obviously greater than that of the multi-level converter

Method used

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  • Heterogeneous diode clamping type three-level rectifier
  • Heterogeneous diode clamping type three-level rectifier
  • Heterogeneous diode clamping type three-level rectifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] likefigure 1 As shown, a heterogeneous diode-clamped three-level pseudo-totem pole rectifier,

[0045] The inventive rectifier includes a switching tube S 1 , S 2 , S 3 , S 4 , Diode D 1 ~D 6 , AC power u g , inductance L 1 , L 2 , capacitance C 1 、C 2 ;

[0046] The pseudo-totem pole consists of diode D 1 , switch tube S 1 , inductance L 1 with diode D 2 , switch tube S 2 , inductance L 2 , whose structure is connected as figure 1 shown.

[0047] The diode on the left side of the rectifier D 1 , switch tube S 1 , inductance L 1 with diode D 2 , switch tube S 2 , inductance L 2 constitute two pseudo-totem pole bridge arms respectively; the right side is the switch tube S 3 , S 4 , Diode D 3 、D 4 、D 5 、D 6 Composed of heterogeneous bidirectional tube clamping three-level structure.

[0048] Series Split Capacitor C 1 、C 2 To form a DC bus, because the series capacitors are equal in size, each capacitor bears the DC bus voltage U dc half o...

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Abstract

According to a heterogeneous diode clamping type three-level rectifier, one side of an alternating current power supply ug is connected with parallel inductors L1 and L2, and the inductor L1 is connected with the drain electrode of a switching tube S1 and the anode of D1 to form a node a; the inductor L2 is connected with the cathode of the diode D2 and the source electrode of the S2 to form a node b; the other side of the alternating current power supply ug is connected with a source electrode of a switching tube S3 and a drain electrode of a switching tube S4 to form a node N; the cathode of the diode D1, the cathode of the diode D3, the drain electrode of the switching tube S2 and the anode of the capacitor C1 are connected to a node p; the anode of the diode D2, the anode of the D4, the source electrode of the switching tube S1 and the cathode of the capacitor C2 are connected to a node m; and the anode of the diode D5, the cathode of the diode D6 and the split capacitors C1 and C2 are connected to a node n. According to the heterogeneous diode clamping type three-level rectifier, switching loss of a switching tube can be reduced, harmonic waves and voltage stress of the switching tube are reduced, and the rectifier has high reliability.

Description

technical field [0001] The invention relates to the field of multilevel converters, in particular to a three-level rectifier of heterogeneous diode clamping type. Background technique [0002] With the development of DC transmission, the traditional two-level converter is gradually being replaced by the emerging multi-level converter. The purpose of research on multilevel converters is to improve the configuration of power circuits for higher efficiency, reliability, lower harmonics and voltage stress. The switching loss of the switching tube in the traditional two-level converter is obviously greater than that of the multi-level converter. The switching loss of the switch tube is expressed in the form of heat. In order to control the temperature of the switch tube not to exceed the allowable value, the only way to reduce the heat loss is to reduce the number of times the switch is turned on and off. [0003] The voltage stress of the switching tube in the traditional two-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/219H02M7/797H02M1/42H02M1/32
CPCH02M7/219H02M7/797H02M1/4225H02M1/4233H02M1/32Y02B70/10
Inventor 马辉敬成徐甜川郑凯通
Owner CHINA THREE GORGES UNIV
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