Universal test bench for AC traction motors 600V/500A

The paper describes design and realization of the universal test bench intended for testing of electric traction machines for electric pallet truck and forklifts. The extreme parameters (Output current up to 500A and max. output voltage up to 600V) are desired for possibility to test prototypes of the motors with wide range of voltages and currents. Another unconventional parameter of this test bench is availability to connect wide range of speed and positions sensors commonly used in motor applications (resolvers, sin/cos encoders, incremental encoders or others sensors with various digital interfaces). The paper describes design of power part of the test bench as well as its control and measurement structure with sensor data processing circuits. Significant part of the article is the example of use “reconfigurable topology amplifier” tool for adaptation of current sensor signal to analog-digital converter.