Current transformer IGBT power module field double-pulse testing system and method

Abstract

The present invention relates to a current transformer IGBT power module field double-pulse testing system and a method. The testing system comprises a double-pulse testing circuit which comprises a double-pulse testing circuit which comprises an input power supply (1), a current transformer and a load which are connected in order, a detection unit which is used for detecting the relevant parameters of each IGBT in the IGBT power module (3) in the current transformer, a data acquisition unit which is connected to the detection unit and is used for collecting the measured relevant parameters of the IGBT, and a data processing unit which is connected to the data acquisition unit and is used for carrying out analyzing processing on the measured relevant parameters of the IGBT. The testing method comprises the steps of (1) constructing a double-pulse testing circuit, (2) carrying out data measurement to measure the switch parameter of each IGBT in the IGBT power module (3) in the current transformer, and (3) carrying out data processing to carrying out analyzing processing on the measured switch parameter of the IGBT. Compared with the prior art, the system and the method have the advantages of accurate measurement and convenient measurement and are suitable for field measurement.

Description

technical field [0001] The invention relates to a converter IGBT power mode test system and method, in particular to a converter IGBT power module on-site double-pulse test system and method. Background technique [0002] In recent years, IGBT power modules have been widely used in electric drives and new energy power generation systems, such as electric vehicles, subways, high-speed rails, and wind power. The invention proposes a double-pulse test system and method for an IGBT power module in a converter to facilitate on-site measurement of IGBT switch characteristics, which is of great significance for ensuring safe, efficient and reliable operation of the converter. On the one hand, in the design and development stage of the converter, on-site measurement of the switching characteristics of the IGBT power module in the converter can provide a basis for gate drive and main circuit optimization (such as gate resistance value selection, DC busbar layout, etc.). For example,...

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Problems solved by technology

However, the system can only be tested in the laboratory and is not suitable for field testing

[0005] In the article "Design of High Efficiency Converter for High Power Direct Drive Wind Power System" published by the Chinese Journal of Electrical Engineering in 2010, a method combining circuit time domain simulation and device loss curve to calculate converter loss is proposed. This method does not require additional devices , but because there is a certain difference between the device loss curve and the actual operating situation, the error of this method is large, and it is difficult to meet the engineering requirements

The device can automatically collect, transmit and process the data obtained from the double-pulse test to obtain the dynamic characteristics of the IGBT, but this method is not suitable for on-site testing

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