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Overvoltage protection apparatus and method, power supply module, and electric drive control system

An overvoltage protection device, power module technology, applied in emergency protection circuit device, protection against overvoltage, emergency protection device with automatic disconnection, etc., can solve problems such as poor protection timeliness, achieve high reliability, Improve reliability, protect quickly and effectively

Pending Publication Date: 2018-04-20
ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide an overvoltage protection device, method, power supply module and electric drive control system to solve the problem of poor timeliness of protection in the prior art when the bus is overvoltage. problem, to achieve the effect of improving the timeliness of protection

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  • Overvoltage protection apparatus and method, power supply module, and electric drive control system
  • Overvoltage protection apparatus and method, power supply module, and electric drive control system
  • Overvoltage protection apparatus and method, power supply module, and electric drive control system

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Embodiment Construction

[0042] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0043] In one embodiment, the overvoltage protection circuit can be used to detect whether the bus is overvoltage, and the MCU can start a protection action according to the fault state of the bus overvoltage.

[0044] In one example, the bus voltage can be divided and sampled through precision resistors, input to the main control chip for analog-to-digital conver...

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Abstract

The invention discloses an overvoltage protection apparatus and method, a power supply module, and an electric drive control system. The apparatus comprises an overvoltage detection unit (1) and a protection driving unit (2), the overvoltage detection unit (1) is used for predicting whether a direct current bus voltage is greater than the upper limit of a first set voltage range before the directcurrent bus voltage caused by abrupt change of an alternating current power supply voltage at an input side of a to-be-protected power supply module is not greater than the upper limit of the first set voltage range, and the protection driving unit (2) is used for executing a set protection motion in the condition that the overvoltage detection unit (1) predicts that the direct current bus voltagecaused by the abrupt change of the alternating current power supply voltage will be greater than the upper limit of the first set voltage range. According to the scheme, defects of poor protection timeliness, low reliability and large damage to devices in the prior art can be overcome, and beneficial effects of good protection timeliness, high reliability and small damage to the devices can be realized.

Description

technical field [0001] The invention belongs to the technical field of electric power control, and in particular relates to an overvoltage protection device, method, power supply module and electric drive control system, in particular to a bus overvoltage protection circuit which can effectively prevent sudden changes in power supply voltage, and has the bus overvoltage protection circuit. The power supply of the circuit, the electric drive control system with the power supply, and the overvoltage protection method of the electric drive control system. Background technique [0002] The electric drive control system is mainly composed of a motor and a control device; among them, the control device can use the motor to drive the control object to perform electric drive control (also known as electric drive control). In the current electric drive control system, the frequency converter will mainly complete the conversion of AC-DC-AC. During the conversion process, if the bus vo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/12H02H3/20H02H3/06G01R19/165
CPCH02H3/06H02H3/20H02H7/1216G01R19/16576
Inventor 郭伟林俞灯军陈广辉
Owner ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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