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Thyristor fault detecting device

A thyristor failure detection device technology, applied in the direction of measuring devices, emergency protection circuit devices, measuring electricity, etc., can solve the problems of damaged controllers, damaged capacitors, etc., easy to use, prevent capacitors and even controllers from being damaged, and have a simple structure Effect

Active Publication Date: 2015-06-24
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the thyristor has an open circuit or short circuit fault, and the controller cannot know the fault state of the thyristor, it will cause damage to the capacitor, and may even damage the controller

Method used

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Embodiment Construction

[0027] In order to make the technical solution of the present invention clearer, the thyristor fault detection device and method of the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention and not to limit the present invention.

[0028] see Figure 1 to Figure 4 , the thyristor fault detection device is arranged between the rectifier module A1 and the capacitor at the rear end. Wherein, the rectification module A1 includes a rectification circuit and a thyristor VT1, and the rectification circuit consists of six diodes V1-V6 to form a rectification bridge for converting AC power into DC power. The thyristor VT1 is arranged on the upper bridge arm of the DC bus, that is, the anode of the thyristor VT1 is electrically connected to the cathodes of the diodes V1-V3.

[0029] The thyristor fault detection device...

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Abstract

The invention provides a thyristor fault detecting device comprising a switch, a first switch control mechanism, a voltage detecting mechanism and a fault judging mechanism. The switch and a soft start resistor are connected in series and then connected to the two ends of a thyristor in parallel. The input end of the voltage detecting mechanism is connected to the two ends of the thyristor, and the voltage detecting mechanism is used for detecting the voltage difference between the two ends of the thyristor. The output end of the voltage detecting mechanism is electrically connected with the input end of the fault judging mechanism. The output end of the fault judging mechanism is electrically connected with a controller. The first switch control mechanism is connected with the voltage detecting mechanism in series. The thyristor fault detecting device prevents the situation that under the condition that a thyristor breaks down, an actuator goes on working, so that a capacitor and even the controller are damaged, and is simple in structure and convenient to use.

Description

technical field [0001] The invention relates to the technical field of detection devices, in particular to a thyristor fault detection device. Background technique [0002] A rectifier module with a thyristor is often used in the rectifier circuit of the linear motor driver. When the controller is powered on, the rectifier part in the rectifier module converts the AC power into a DC power, and then through the soft-start resistor to the parallel connection at both ends of the DC bus. The capacitor is charged. When the voltage on the capacitor reaches a certain value, the controller controls the thyristor to turn on. After the thyristor is turned on, the soft-start resistor is bypassed, and the controller completes the power-on process. However, when the thyristor has an open-circuit or short-circuit fault, and the controller cannot know the fault state of the thyristor, the capacitor will be damaged, and the controller may even be damaged. Contents of the invention [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/26G01R31/02H02H7/20
Inventor 蒋哲张弛陈龙刘强
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI