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A control method and control device for a pwm rectifier

A control method and technology of a control device are applied in the output power conversion device, the conversion of AC power input to DC power output, electrical components and other directions, which can solve the problems affecting the reliability of fault detection, difficult to detect faults accurately and quickly, etc. Achieve the effect of avoiding detection interference and ensuring reliability

Active Publication Date: 2019-03-08
HUAWEI DIGITAL POWER TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The embodiment of the present invention provides a control method and a control device for a PWM rectifier, which solves the problem that the fault of the input source of the PWM rectifier is difficult to be accurately and quickly detected, thereby affecting the reliability of fault detection.

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  • A control method and control device for a pwm rectifier
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  • A control method and control device for a pwm rectifier

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Embodiment Construction

[0024] In order to provide an implementation plan to ensure the reliability of fault detection, the embodiment of the present invention provides a control method and a control device for a PWM rectifier. The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the The preferred embodiments are only used to illustrate and explain the present invention, not to limit the present invention. And in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0025] An embodiment of the present invention also provides a control method for a PWM rectifier, such as figure 1 As shown, specifically, the following steps may be included:

[0026] Step 101, detecting the DC bus voltage of the PWM rectifier;

[0027] Step 102, when the DC bus voltage of the PWM rectifier is lower than the set value, control the PWM rect...

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Abstract

A control method and a control device for a PWM rectifier, the fault of the input source of the PWM rectifier can be accurately and quickly detected, thereby ensuring the reliability of fault detection. The control method of the PWM rectifier includes: detecting the DC bus voltage of the PWM rectifier; when the DC bus voltage of the PWM rectifier is lower than a set value, controlling the PWM rectifier to be in a rectification mode, and energy flows from an input source of the PWM rectifier to a load.

Description

technical field [0001] The present invention relates to the technical field of power electronics, in particular to a control method and a control device for a PWM (Pulse Width Modulation, pulse width modulation) rectifier. Background technique [0002] With the development of power electronics technology, PWM rectifiers are widely used in various occasions that require high power supply reliability. For example, in the communication field, PWM rectifiers can be used to supply power to key loads. [0003] In the prior art, when the PWM rectifier is working, the main switching tube of the PWM rectifier sends complementary waves, and the working mode of the PWM rectifier is automatically switched according to the load type of the PWM rectifier: when the load of the PWM rectifier is an absorbing load, the PWM rectifier is in rectification mode. mode, energy flows from the input source of the PWM rectifier to the load; when the load of the PWM rectifier is a regenerative load, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/217H02M1/08
CPCH02M1/08H02M7/217H02M1/0006
Inventor 梁向辉孔雪娟闫超
Owner HUAWEI DIGITAL POWER TECH CO LTD
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