Health state on-line monitoring circuit and system of power device

A technology for power devices and health status, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., which can solve the problems of inability to timely and accurately know power devices and lack of application scenarios.

Pending Publication Date: 2021-07-30
INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is often unable to timely and accurately know the actual situation of power devices during use, and obviously does not have a wide range of application scenarios

Method used

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  • Health state on-line monitoring circuit and system of power device
  • Health state on-line monitoring circuit and system of power device
  • Health state on-line monitoring circuit and system of power device

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Experimental program
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Embodiment Construction

[0031] The core of the present application is to provide an online health status monitoring circuit and system of power devices, which are used for online monitoring of the health status of power devices.

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0033] figure 1 A schematic structural diagram of an online health state monitoring circuit of a power device provided in an embodiment of the present application.

[0034] Such as figure 1 As shown, the online health status monitoring circuit of the power device provided in th...

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PUM

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Abstract

The invention discloses a health state on-line monitoring circuit of a power device. The health state on-line monitoring circuit comprises a sampling resistor and a voltage signal acquisition circuit, wherein the sampling resistor is connected in series with a gate driving loop of the tested power device, the input end of the voltage signal acquisition circuit is connected in parallel with the two ends of the sampling resistor, and the output end of the voltage signal acquisition circuit is connected to the on-line monitoring equipment for the health state of the tested power device. A sampling resistor connected in series with a gate driving loop of a tested power device and a voltage signal acquisition circuit used for detecting voltages at two ends of the sampling resistor are utilized to acquire the change condition of gate leakage current of the tested power device in the switching process in real time; therefore, the output end of the voltage signal acquisition circuit is connected with a controller or a detection device so as to achieve on-line evaluation of the health state of the detected power device. The invention further discloses a health state on-line monitoring system of a power device, and the online monitoring system has the beneficial effects.

Description

technical field [0001] The present application relates to the technical field of circuit detection, in particular to an online health status monitoring circuit and system of power devices. Background technique [0002] Power devices are widely used in consumer electronics, communication equipment, industrial control, motor drive, and power systems. Including mobile terminals such as mobile phones, personal computers, notebooks, server adapters, UPS power supplies, etc.; power supplies for communication sites, base stations, and data centers; various servo motor controls in industrial applications; AC motor drives in electric vehicles and high-speed rail; power grids Medium and solid state transformers, HVDC transmission systems, flexible AC transmission systems, etc. When a power device is impacted by an excessive current, its dynamic and static characteristic parameters will inevitably degrade, including: switching threshold voltage, dynamic on-resistance, gate leakage cur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/27
CPCG01R31/27
Inventor 银杉吴瀛喆辛雄刘寅宇
Owner INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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