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IGBT-based voltage-adjustable PWM rectifier topology

A rectifier and adjustable voltage technology, which is applied in the direction of irreversible AC power input conversion to DC power output, output power conversion device, AC power input conversion to DC power output, etc., which can solve the problem that PWM rectifier cannot adjust voltage, etc. Achieve high power factor and low harmonic pollution

Inactive Publication Date: 2018-08-14
XIAN UNIV OF TECH
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  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of adjustable voltage PWM rectifier topology based on IGBT, which solves the problem that the PWM rectifier in the prior art cannot regulate voltage

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  • IGBT-based voltage-adjustable PWM rectifier topology

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Embodiment Construction

[0015] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] A kind of adjustable voltage PWM rectifier topology based on IGBT of the present invention, such as figure 1 As shown, it includes a three-phase AC power supply 1, the three-phase AC power supply 1 is connected to the AC side filter circuit 2, the output end of the AC side filter circuit 2 is connected to the full control device 6, the full control device 6 includes three groups of IGBTs, and the first group of IGBTs includes Power switch tube Q 1 and Q 2 , power switch tube Q 1 The collector C is connected to the output terminal of the AC side filter circuit 2, and the power switch tube Q 1 The emitter E and the power switch tube Q 2 The emitter E is connected; the second group of IGBTs includes the power switch tube Q 3 and Q 4 , power switch tube Q 3 The collector C of the collector is connected to the AC side filter circuit ...

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Abstract

The invention relates to an IGBT-based voltage-adjustable PWM rectifier topology, comprising a three-phase AC power supply, wherein the three-phase AC power supply is connected to an AC side filter circuit, the output end of the AC side filter circuit is connected to a full control device, the full control device comprises three groups of IGBTs, each group of IGBTs include two power switch tubes that are in reverse series connection, the output end of the full control device is connected to a diode rectifier bridge, the output end of the diode rectifier bridge is connected to the filter circuit, and the filter circuit is connected to the load. According to the IGBT-based voltage-adjustable PWM rectifier topology disclosed by the invention, the problem that a PWM rectifier cannot adjust thevoltage in the prior art can be solved, two trigger modes that are PWM and SVPWM are adopted, the DC output voltage can be adjusted by 0-100%, and in the SVPWM trigger mode, the grid-side sinusoidalcurrent can be realized, and the effects of small grid-side harmonic pollution and high grid-side power factor can be achieved.

Description

technical field [0001] The invention belongs to the technical field of power electronics and relates to an IGBT-based voltage-adjustable PWM rectifier topology. Background technique [0002] With the emergence of fully-controlled high-power switching devices and the improvement of PWM control technology, PWM rectifiers have been more widely used because of their low harmonics of grid-side current and high power factor. At present, the topologies of three-phase PWM rectifiers commonly used at home and abroad include two-level PWM rectifier topology, diode-clamped three-level rectifier topology, and two-quadrant mid-point clamped three-level PWM rectifier topology. Among them, the topology of the two-level PWM rectifier is composed of 6 fully-controlled devices, the output of the DC side is stable, the waveform of the AC side is high in sinusoidal degree, the grid side is pollution-free, and the power factor of the grid side is high, which is suitable for the situation of smal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/217H02M7/25H02M1/12
Inventor 刘庆丰冷朝霞樊吉宝
Owner XIAN UNIV OF TECH
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