Diode bridge arm parallel connection type three-level rectification charger

A three-level rectification, diode technology, applied in current collectors, battery circuit devices, high-efficiency power electronic conversion, etc., can solve the problems of high voltage stress, large input current harmonics, etc., achieve high power, high switching frequency, reduce Effect of Small Input Current Ripple

Pending Publication Date: 2021-08-03
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional two-level rectifiers are subject to high voltage stress and large input current harmonics, so multi-level rectifiers will be more and more widely used

Method used

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  • Diode bridge arm parallel connection type three-level rectification charger
  • Diode bridge arm parallel connection type three-level rectification charger
  • Diode bridge arm parallel connection type three-level rectification charger

Examples

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Embodiment Construction

[0044] Such as figure 1 As shown, a three-level rectification charger of the diode bridge arm parallel connection type, the left side of the rectification charger is a switching tube bridge arm S 1 , S 2 , the right side of the rectifier charger is a three-level structure composed of two diode series bridge arms and a switch clamp branch connected in parallel.

[0045] The rectifier charger of the present invention includes a switch tube S a1 , S a2 , Diode D a1 、D a2 、D a3 、D a4 and switch tube S b1 , S b2 , Diode D b1 、D b2 、D b3 、D b4 , AC power u g , inductance L 1 , L 2 , capacitance C 1 、C 2 ;

[0046] The left side of the rectifier charger is the switching tube bridge arm S 1 , S 2 , the right side is two diode series bridge arms D a1 、D a2 、D a3 、D a4 , switch tube clamping branch S a1 , S a2 and diode series bridge arm D b1 、D b2 、D b3 、D b4 and switch tube clamping branch S b1 , S b2 A three-level circuit composed of parallel connectio...

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Abstract

The invention discloses a diode bridge arm parallel connection type three-level rectification charger. The rectification charger comprises switching tubes S1, S2, Sa1, Sa2, Sb1 and Sb2, diodes Da1, Da2, Da3, Da4, Db1, Db2, Db3 and Db4, inductors L1 and L2, and capacitors C1 and C2. The three-level rectification charger topology is provided with a parallel diode bridge arm structure in inductance connection, and a series diode bridge arm unit module can be used as a three-level modularized power unit structure. The diode bridge arm parallel connection type three-level rectifying charger is provided with the diode bridges and the three-level structure which are connected in parallel, and has the advantages that the voltage stress of a switching tube is lower, and the charger can work at a higher power level.

Description

technical field [0001] The invention relates to the technical field of power conversion, in particular to a three-level rectification charger of a diode bridge arm parallel connection type. Background technique [0002] Traditional two-level rectifiers are subject to high voltage stress and large input current harmonics, so multi-level rectifiers will be more and more widely used. Compared with the two-level rectifier, the three-level rectifier has more levels, so its input PWM waveform is closer to a sine wave; when the switching frequency is the same, the three-level rectifier has fewer high-order harmonics and is more Low switching loss; the three-level rectifier has low switching loss and low harmonic content, and the withstand voltage of the capacitor is only half of the DC voltage, which can significantly reduce the voltage stress of the switch tube. Contents of the invention [0003] The present invention provides a three-level rectifier charger of diode bridge arm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/06H02M7/10H02M7/08H02M7/217H02M7/219H02M1/42H02J7/02
CPCH02J7/02H02M1/42H02M1/4225H02M1/4233H02M7/066H02M7/08H02M7/10H02M7/217H02M7/219H02J2207/20Y02B70/10
Inventor 马辉敬成徐甜川刘昊邦
Owner CHINA THREE GORGES UNIV
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