Patent ID: 11874338
Assignee: 741 SOLUTIONS LLC
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A motorless power electronic test device for selectively conducting variable-power, variable-frequency testing of an external power converter and an external rectifier without loading a motor with the test device when conducting the testing, comprising:
a bidirectional internal power converter comprising a DC link and an AC link;
a filter comprising an input and an output;
a plurality of line switches for setting test modes and operating the test device;
a switch controller for operating the line switches to separately test the external power converter or the external rectifier, the bidirectional internal power converter operating in an AC-to-DC mode for testing the external power converter and operating in a DC-to-AC mode for testing the external rectifier;
wherein, when the line switches are set to test the external power converter, the DC link of the bidirectional internal power converter is coupled to a DC link of the external power converter to recycle test power to mitigate electric losses during the variable-power, variable-frequency testing of the external power converter;
wherein, when the line switches are set to test the external rectifier, the output of the filter is coupled to an input of the external rectifier to recycle test power to mitigate electric losses during the variable-power, variable-frequency testing of the external rectifier.