Three-port clamping type back-to-back bridgeless three-level rectifier

A three-level rectification, back-to-back technology, applied in electrical components, high-efficiency power electronic conversion, output power conversion devices, etc., can solve the problems of limited use and large volume of the main circuit, and achieve small voltage ripple and stable bus voltage. Effect

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

However, due to the large volume of the main circuit of the circuit, the use of the three-port clamp type back-to-back bridgeless three-level rectifier in some occasions is limited.

Method used

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  • Three-port clamping type back-to-back bridgeless three-level rectifier
  • Three-port clamping type back-to-back bridgeless three-level rectifier
  • Three-port clamping type back-to-back bridgeless three-level rectifier

Examples

Experimental program
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Embodiment Construction

[0035] The specific experimental parameters are as follows:

[0036] A three-port clamp type back-to-back bridgeless three-level rectifier, the effective value of the grid voltage on the input side is 220V, the frequency is 50Hz, the output voltage on the DC side is 400V, the switching frequency is 20kHz, the filter inductance L=3mH, the resistance of the load RL The value is 80, the output capacitance C1=C2=4700μF.

[0037] A three-port clamp type back-to-back bridgeless three-level rectifier, the rectifier includes a new single-phase three-level PWM rectifier circuit, an uncontrolled rectifier bridge circuit, a bidirectional switch tube circuit, and two series-connected voltage stabilizing capacitor circuits;

[0038] The back-to-back bridgeless three-level rectifier using multiple diodes in series is a single-phase three-level PWM rectifier circuit, which includes four switch tubes: S 1 , S 2 , S 3 , S 4 , 6 diodes: D 1 、D 2 、D 3 、D 4 、D 5 、D 6 , a multi-diode ser...

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Abstract

The invention discloses a three-port clamping type back-to-back bridgeless three-level rectifier, and belongs to the technical field of power electronic converters. The three-port clamping type back-to-back bridgeless three-level rectifier comprises a three-port clamping structure and a traditional rectifier bridge arm structure. Compared with a traditional rectifier bridge arm, the three-level rectifier has the advantages that the three-port structure is used for clamping the capacitor voltage so that the voltage stress borne by each semiconductor device in the three-port structure is reduced. Meanwhile, an additional power branch is provided to be directly connected to the midpoint of the series capacitor. According to the three-level rectifier, an extra power channel is provided, and meanwhile, due to the fact that a new diode structure is added, the stability and reliability of a circuit are improved. Compared with a traditional two-level rectifier, the rectifier has the advantages that the number of levels of phase voltage on the alternating current side can be three, and the capacitance value can be remarkably reduced; the voltage stress of the device is reduced; the cost of capacitors and semiconductor devices is reduced; and the size of the circuit is correspondingly increased due to the complexity of the three-port structure.

Description

technical field [0001] The invention relates to the technical field of single-phase three-level active rectifiers, in particular to a three-port clamp type back-to-back bridgeless three-level rectifier. Background technique [0002] For conventional power factor correction (PFC) rectifiers, high efficiency cannot be achieved in a wide input voltage range, such as when the public grid is used as a power source, and the efficiency will be greatly reduced when the AC voltage level is low. The back-to-back bridgeless three-level rectifier of the three-port clamping type can be flexibly adapted to the appropriate working mode to obtain the maximum efficiency due to the three-level structure. At the same time, the three-port clamp-type back-to-back bridgeless three-level rectifier can maintain a stable voltage output to the load while maintaining a high power factor. Compared with the traditional two-level rectifier, the proposed three-port clamped back-to-back bridgeless three-l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/217H02M7/797H02M1/42H02M1/32
CPCH02M7/217H02M7/797H02M1/4225H02M1/32Y02B70/10
Inventor 马辉曾雨涵周沫函邹旭
Owner CHINA THREE GORGES UNIV
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