ON test method null of self-excitation type

摘要

A method and an apparatus for testing a self-commutative electric power conversion device (10), capable of verifying the maximum voltage stress and the maximum current stress in the main circuit of the device by using a testing facility equipped with the power source (20) and the load (L) having relatively small capacities. The pulse shaped turn on and turn off signals are supplied to the switching elements in the self-commutative electric power conversion device, such that a load current having a desired current level for testing flows though an inductive load (L) connected to an AC output side of the self-commutative electric power conversion device (10) having the DC capacitor (c) charged to a desired voltage level for testing. Then, voltage and current waveforms in the self-commutative electric power conversion device (10) are measured, while the pulse shaped turn on and turn off signals are supplied to the switching elements, to verify an operation of the self-commutative electric power conversion device (10) under voltage stress and current stress. IMAGE