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Hybrid power device three-phase three-level ANPC-DAB converter and modulation method thereof

A hybrid power and converter technology, which is applied in the direction of converting DC power input to DC power output, output power conversion devices, and adjusting electrical variables, can solve problems such as increasing the cost of converters, and achieve increased power density and reduced filtering Capacitor size, effect of current ripple reduction

Pending Publication Date: 2022-06-21
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] In the vast majority of existing ANPC-DAB converter topologies, unified power devices are used. Obviously, in high-power applications, Si devices limit the performance of converters due to their inherent properties. SiC devices have high switching frequency and low switching loss. The advantages are more prominent, but all SiC devices will undoubtedly greatly increase the cost of the converter

Method used

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  • Hybrid power device three-phase three-level ANPC-DAB converter and modulation method thereof
  • Hybrid power device three-phase three-level ANPC-DAB converter and modulation method thereof
  • Hybrid power device three-phase three-level ANPC-DAB converter and modulation method thereof

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Embodiment Construction

[0054] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0055] The present invention provides a three-phase three-level ANPC-DAB converter of a hybrid power device, the overall structure of which refers to figure 1 , including: input side three-phase half-bridge ANPC circuit, three-phase auxiliary inductor and transformer, output side three-phase half-bridge ANPC circuit and ANPC circuit drive signal modulation unit.

[0056] The DC side of the three-ph...

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Abstract

The invention discloses a three-phase three-level ANPC-DAB converter of a hybrid power device and a modulation method of the three-phase three-level ANPC-DAB converter, and belongs to the technical field of direct current-direct current converters. The driving modulation method suitable for the converter topology is provided by considering the particularity of the converter topology structure, current condition analysis in a time domain is effectively avoided, all switching loss is concentrated in a SiC MOSFET, the advantages of a SiC device are fully utilized, the switching loss of the converter is effectively reduced, and the conversion efficiency of the converter is improved. And the efficiency of the converter is improved. According to the method, a fundamental wave analysis method is adopted, an expression of the transmission power of the converter is obtained by means of a Fourier series expansion result, and a basis is provided for subsequent voltage and current modulation of the converter.

Description

technical field [0001] The invention belongs to the technical field of DC-DC converters, and more particularly, relates to a three-phase three-level ANPC-DAB converter of a hybrid power device and a modulation method thereof. Background technique [0002] As a key device in the DC distribution network, the Dual Active Bridge (DAB) converter can not only achieve voltage conversion and electrical isolation, but also meet the power transmission requirements of bidirectional energy flow, and has the ability to operate under single-phase shift control. Inherent soft switching capability, widely used. In order to improve the power level of the single-phase topology, the three-phase DAB topology has a higher power level and a higher power density of the converter due to the coupling of the number of phases, and the reduced DC side current ripple makes the filter capacitor small in size, low in cost, and significantly reduced. The size and weight of the converter are reduced, the e...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M1/14H02M1/088
CPCH02M3/33584H02M1/14H02M1/088
Inventor 张宇吴欣蜜杨佳文
Owner HUAZHONG UNIV OF SCI & TECH
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