OTP-based Test System for Railway and General Power Electronics Modules
Power electronics assemblies often cannot be tested using conventional technology for their electrical performance. Due to the adaptability of the instrumentation, the OTP concept offers an ideal platform even beyond the space requirements of several control cabinets. In order to achieve high test flexibility with different assemblies, the system was equipped with three-phase AC sources and AC loads as well as a precise three-phase power meter. DC sources and loads with different current and voltage ranges cover the test of frequent DUT operating parameters. Time-dependent voltage or current signals can be stimulated by an arbitrary generator with power amplifier. General measurements such as current, voltage, frequency, resistance can be carried out flexibly at various test points using the matrix concept. An oscilloscope with RF multiplexer is available for high-frequency measurements such as residual ripple, switching processes, etc.
In order to be able to test DUTs with mechanically large dimensions, a worktable was supplied in which the contour of the Virginia Panel table was fully integrated. This means that even heavy DUTs can be easily integrated into the test adapter. The operator safety is guaranteed at all times thanks to specially integrated safety circuits and a positive touch protection on the test adapter. The correct functioning of the system can be checked at any time using a self-test adapter.
Customer specific Software
Special test steps for interactive operator guidance were implemented in LabVIEW.