Recent years have seen a shift from DC motors to electrically commutated motors (EC motors) in critical and safety critical vehicle applications. The chosen motor should be optimally exploited, above all in terms of optimized efficiency for the required torque profile.
In this regard, several challenges need to be faced. Along with precisely determining the relationship between magnetic flux and current, the power electronics (ECU) must be programmed with the optimum control sequence based on the assessed flux ratios. If possible, this should be individually tailored to each motor specimen and its associated ECU unit. On top, all this should be accomplished with shorter test cycles and simple test processes and setups.
Test stands from imc achieve this by avoiding the classic design consisting of load machine, torque measuring shaft and coupling provisions. A model based approach to determining motor parameters using dynamic measurement data has taken its place.