Dynamic test board for needle-shaped terminal full-bridge power module

Abstract

The invention discloses a dynamic test board for a needle-shaped terminal full-bridge power module, and belongs to the field of power module testing. A plurality of needle-shaped terminals are arranged on the power module, and the test board comprises a direct current bus interface, a connecting module, a driving module, a decoupling module, an inductance access module and a test module which are arranged on a double-layer circuit board; the connecting module is arranged on the outlet side of the double-layer circuit board and comprises a plurality of connecting holes in one-to-one correspondence with the needle-shaped terminals; the decoupling module is formed by connecting a plurality of decoupling branches in parallel, each decoupling branch is formed by connecting a plurality of surface-mounted decoupling capacitors in series, and the two ends of each surface-mounted decoupling capacitor are connected with a surface-mounted resistor in parallel; the decoupling module is connected with the power module plugged on the connection module, and the distance between the decoupling module and the power module is smaller than a preset threshold value; and the direct current bus interface, the driving module, the inductance access module and the test module are respectively connected with the corresponding connecting holes. The dynamic test board is small in area, low in cost, flexible to adjust and resistant to high voltage, and the test effect is improved.

Description

technical field [0001] The invention belongs to the field of power module testing, and more specifically relates to a dynamic testing board for full-bridge power modules with pin-shaped terminals. Background technique [0002] In recent years, with the development of power electronics technology, power modules using pin terminals have been greatly developed. The terminal position of the power module can be adjusted flexibly, which brings great convenience to the module design. As an important part of the full-bridge power module test, the dynamic test generally uses a double-pulse test method to test the switching performance parameters of each switching tube in a certain half-bridge. [0003] For the full-bridge power module with pin-shaped terminals, it includes two half-bridge branches, and the terminal positions are flexible and changeable. Therefore, there is a higher flexible layout requirement for the dynamic test board. In addition, the traditional dynamic test boa...

AI Technical Summary

Problems solved by technology

In addition, the traditional dynamic test board contains large-capacity electrolytic capacitors and film capacitors, which makes the area of ​​the dynamic test board larger and the cost is higher. When changing the structure of the power module or replacing the test module, it is necessary to replace the dynamic test board. The original dynamic test The electrolytic capacitors and film capacitors on the board cannot be reused, causing a lot of waste and increasing the cost

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