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Power assembly fault recording and diagnosis system and method

A technology for power components and fault recording, applied in measuring devices, instruments, measuring electricity and other directions, it can solve the problems of inability to accurately locate the cause of the fault, and the failure time cannot be reproduced, and achieve the effect of improving efficiency.

Active Publication Date: 2018-10-02
ZHUZHOU CRRC TIMES SEMICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide a power component fault recording and diagnosis system and method to solve the technical problem that when a converter power component fails, the conditions at the time of the fault cannot be reproduced, and the cause of the fault cannot be accurately located

Method used

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  • Power assembly fault recording and diagnosis system and method
  • Power assembly fault recording and diagnosis system and method
  • Power assembly fault recording and diagnosis system and method

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Embodiment 1

[0054] as attached figure 1 As shown, a specific embodiment of a power component fault recording and diagnosis system includes: a power component 1 , and a control circuit 2 connected to the power component 1 .

[0055] As a typical specific embodiment of the present invention, the power assembly 1 adopts a three-phase bridge converter structure, and includes:

[0056] The power module 11, the power module 11 can be an IGBT module;

[0057] A voltage sensor 12 for collecting voltage signals of the power module 11;

[0058] A temperature sensor 13 for collecting a temperature signal of the power module 11;

[0059] and a current sensor 14 for collecting current signals of the power module 11;

[0060] And a radiator (not shown in the drawings) that provides heat dissipation for the power module 11;

[0061] The control circuit 2 includes a main control unit 21, a sampling unit 22 connected to the main control unit 21, an interface unit 23 and a fault storage unit 26, which ...

Embodiment 2

[0073] A specific embodiment of a power component fault record diagnosis method based on the system described in the embodiment, comprising the following steps:

[0074] A) The voltage sensor 12 collects the voltage signal of the power module 11, the temperature sensor 13 collects the temperature signal of the power module 11, and the current sensor 14 collects the current signal of the power module 11;

[0075] B) The sampling unit 22 acquires the signals collected by the voltage sensor 12, the temperature sensor 13 and the current sensor 14 in real time, and sends the data to the main control unit 21;

[0076] C) The main control unit 21 reads the data sent by the sampling unit 22. When the main control unit 21 detects that the power component 1 has failed, it will record the voltage, temperature and current data of the power module 11 within a set time before and after the failure, and the fault State information and input PWM pulse data are saved to the fault storage unit ...

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Abstract

The invention discloses a power assembly fault recording and diagnosis system and method. The system comprises a power assembly and a control circuit; a main control unit obtains signals collected bya voltage sensor, a temperature sensor and a current sensor in real time through a sampling unit; the control circuit includes the main control unit as well as the sampling unit, an interface unit, and a fault storage unit which all are connected with the main control unit; when detecting that the power assembly fails, the main control unit stores the voltage, temperature and current data of the power module before and after the malfunction of the power module, fault state information and input PWM pulse data to the fault storage unit; and an external upper computer accesses the fault storageunit through the interface unit and the main control unit, and reads out the voltage, temperature, and current signal waveforms before and after the malfunction, the fault state information and the input PWM pulse data so as to analyze, locate, and troubleshoot the fault of the power assembly. With the system and method of the invention adopted, the technical problem of the failure to reproduce the conditions of a fault time point and accurately locate the cause of the fault of the power assembly of a converter when the power assembly of the converter fails can be solved.

Description

technical field [0001] The invention relates to the field of fault diagnosis of electrical components, in particular to a system and method for fault recording and online diagnosis of converter power components. Background technique [0002] A converter is an electrical device that changes the voltage, frequency, phase number and other power or characteristics of the power system, and is widely used in the field of electronic and electrical systems. At present, when a converter power component fails, the cause of the failure cannot be accurately located because the environment and conditions at the time of the failure cannot be reproduced. In the prior art, there are mainly the following technical solutions that are relatively similar to the application of the present invention: [0003] Document 1 is a Chinese invention patent "On-line Fault Diagnosis Method of Converter Power Module Based on Harmonic Monitoring" which was applied by Tongji University on March 26, 2013 and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 李保国卢圣文陈燕平黄南刘敏安蒋云富彭鹏陈正文潘欢
Owner ZHUZHOU CRRC TIMES SEMICON CO LTD
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