Converter power module hedging test system

Abstract

The invention discloses a converter power module hedging test system which aims to reduce the power supply capacity of converter power module test. The system disclosed by the invention is provided with a power system, a control system and even sets of reactors, wherein the reactors are electrically connected with a tested power module; the power system supplies power to the tested power module; the control system outputs a SPWM waveform enabling the power modules to output reactive current with the same direction and opposite directions; and then, half of the power modules output inductive reactive current while the other half of the power modules output capacitive reactive current. Compared with the prior art, in the invention, the total instantaneous reactive power of the power modulesis zero in the test process; a module full-voltage and high-current continuous test can be conducted for a power device, the power modules and even the whole machine simply by using a small-capacity power system; the power capacity and the power loss required for a high-voltage and high-current continuous test of the power device are reduced; the construction cost of the test device is lowered; and the working efficiency of power module test is effectively improved.

Description

technical field [0001] The invention relates to a test system for a converter, in particular to a test system for a power module of the converter. Background technique [0002] Inverters composed of power electronic switching devices need to conduct necessary tests on power electronic switching devices and their power modules during the development, design and manufacturing process of power modules, or in the troubleshooting process of power modules. The purpose is to : 1. Through the test, it can be confirmed whether the power module design meets the R&D design requirements: the voltage and current stress of the switching device IGBT (Insulated Gate Bipolar Transistor) under rated working conditions, the anti-interference ability of the control board, and the The heat dissipation effect of the components and the loss of the entire device under different parameters of various water-cooled and air-cooled systems. 2. Through the test, the state of the manufactured power modul...

AI Technical Summary

Problems solved by technology

In recent years, various test devices have been developed in the industry to test power electronic switching devices and power modules, but there are two problems in using existing test devices for testing multiple power modules: on the one hand, if the The full-load test of multiple power modules requires a high-voltage power supply and large capacity. The high-voltage and large-capacity power supply requirements greatly increase the cost of the test device; on the other hand, if the power modules are tested one by one, the test time is long and the labor cost is relatively high. High, reducing the efficiency of enterprise production and testing

In addition, the large test power consumption is also a deficiency of existing test devices

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