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Matrix converter for outputting fixed-frequency fixed-phase alternating-current voltage and modulation method thereof

A matrix converter, AC voltage technology

Active Publication Date: 2021-02-23
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the number of switches in the matrix converter is large, and the bidirectional switches are connected in a back-to-back manner. Therefore, most control strategies use overall control of the bidirectional switches and are relatively complicated, which greatly reduces the advantages of the matrix converter.

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  • Matrix converter for outputting fixed-frequency fixed-phase alternating-current voltage and modulation method thereof
  • Matrix converter for outputting fixed-frequency fixed-phase alternating-current voltage and modulation method thereof
  • Matrix converter for outputting fixed-frequency fixed-phase alternating-current voltage and modulation method thereof

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Embodiment Construction

[0028] Below in conjunction with embodiment the present invention is described in further detail:

[0029] Such as Figure 1 to Figure 7 As shown, a matrix converter that outputs fixed-frequency and fixed-phase AC voltage, the input power of this topology is a star-connected three-phase grid voltage e a 、e b 、e c ; The input filter adopts a three-phase L-shaped structure, which consists of L a , Lb and L c Composition; three-phase grid voltage e a 、e b 、e c Respectively and L a , L b and L c Connected at one end; the input filter consists of L a , L b and L c The other ends are respectively connected to the two-way switch group.

[0030] The bidirectional switch group is composed of back-to-back connected S ap1 and S an4 , back-to-back connected S ap3 and S an6 , back-to-back connected S ap5 and S an2 , back-to-back connected S ap4 and S an1 , back-to-back connected S ap6 and S an3 , back-to-back connected S ap2 and S an5 6 pairs of bidirectional switc...

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Abstract

The invention discloses a matrix converter for outputting fixed-frequency fixed-phase alternating-current voltage and a modulation method of the matrix converter, and relates to the technical field ofmodulation control of power electronic power converters. The matrix converter for outputting the fixed-frequency fixed-phase alternating-current voltage adopts a three-phase AC / single-phase AC non-isolated matrix converter as a topology. Based on the converter topology, a voltage type SVM combinational logic modulation method is provided. A voltage type 6-sector SVM serves as basic modulation, positive and negative polarity selection signals logically decompose a bidirectional controllable switch tube of the matrix converter into a unidirectional controllable switch tube, and logically decompose a bidirectional switch group into positive and negative groups of common three-phase AC / single-phase AC topologies. Due to the characteristics of positive and negative polarity selection signals,positive and negative groups of three-phase AC / single-phase AC topologies work alternately, and the matrix converter outputs fixed-frequency and fixed-phase AC voltage. The matrix converter provided by the invention has the advantages of flexible bidirectional switch tube control, strong load adaptability, low switching frequency, bidirectional energy flow and the like.

Description

technical field [0001] The invention relates to the technical field of modulation control of power electronic power converters, in particular to a matrix converter outputting fixed-frequency and fixed-phase alternating voltage and a modulation method thereof. Background technique [0002] A converter is a topological device that converts alternating current energy of a certain amplitude and frequency into electrical energy of different amplitude and frequency. The matrix converter is called a "universal converter", which can theoretically directly realize the same or different numbers of input and output phases. The three-phase AC / single-phase AC non-isolated matrix converter evolved on the basis of the three-phase-three-phase matrix converter known as the "universal converter". Compared with the traditional PWM rectifier, this converter has It has obvious advantages, such as direct output of AC voltage, bidirectional flow of energy, high efficiency, high power factor, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/22H02M5/293H02M5/297H02M1/088H02M1/12
CPCH02M5/22H02M5/293H02M5/297H02M1/088H02M1/126H02M5/2932
Inventor 闫朝阳姜汉朝奚子伟王璐赵丁选张祝新刘涛
Owner YANSHAN UNIV