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Rectifier control method, device and rectifier

A controller and rectifier technology, which is applied in the output power conversion device, the conversion of AC power input to DC power output, and the conversion of irreversible AC power input to DC power output, etc. The effect of current sudden change and prevention of current distortion

Inactive Publication Date: 2019-03-22
BEIJING INFORMATION SCI & TECH UNIV
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Problems solved by technology

[0003] The invention provides a rectifier control method, device and rectifier, which solves the technical problem that the input current of a single-switch three-phase rectifier has a large sudden change in the prior art

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  • Rectifier control method, device and rectifier
  • Rectifier control method, device and rectifier
  • Rectifier control method, device and rectifier

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Embodiment Construction

[0023] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] To achieve as Figure 4 The current waveform shown, using the Figure 5 The circuit structure of a single-switch three-phase rectifier is shown, Figure 5 and figure 1 The difference is that three small inductors La are added to the AC side. The circuit diagram of the single-switch three-phase rectifier provided in the embodiment of the present invention, as Figure 5 As shown, the single-switch three-phase rectifier includes two parts, namely the three-phase diode bridge rectifier and the DC / DC converter, and the input voltage of the converter is u dc , the input current is i dc , the output voltage is u DC , the driving voltage of the switching tube T is u g ,

[0025] based on Figure 5 As shown in the circuit d...

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Abstract

The invention relates to the field of electric and electronic technology and nonlinear control and discloses a rectifier control method and device and a rectifier. The rectifier control method includes acquiring expected amplitude Imr of alternating current and sinusoidal alternating voltage ur of six-times power frequency by acquiring input voltage udc, input current idc and output voltage uDC of a DC-DC conversion part of the rectifier, constructing a controller of the DC-DC conversion part according to the EL equation model, and controlling a switch tube of the DC-DC conversion part. The rectifier control method can effectively reduce sudden change of the current of the single-switch three-phase rectifier and prevent current distortion.

Description

technical field [0001] The invention relates to the field of power electronics technology and nonlinear control, in particular to a rectifier control method, device and rectifier. Background technique [0002] In order to meet the industry's comprehensive performance requirements for rectifiers, research on unidirectional hybrid three-phase voltage rectifiers has begun abroad. The unidirectional hybrid three-phase voltage type rectifier is composed of two rectifiers A and B working in different topologies and operating frequencies in parallel to supply power to the same load. The input current of the rectifiers A and B is synthesized into a sinusoidal current synchronous with the grid voltage. Rectifier A is generally a single-switch three-phase rectifier composed of a three-phase diode bridge rectifier and a boost DC / DC converter, which bears most of the load power; rectifier B is a three-phase voltage source PWM rectifier working at high frequency, which bears a small par...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/12
CPCH02M7/2173
Inventor 王久和
Owner BEIJING INFORMATION SCI & TECH UNIV
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