Optimization Design of Control Methods for Enhancing High-Frequency Simulation Performance in Motor Emulators

Hardware-in-the-Loop (HIL) motor emulators play a crucial role in industrial applications, particularly in the testing of motor drives. These emulators allow real-time parameter adjustment within the stable operating region, significantly improving the efficiency of drive testing. However, conventional control strategies often result in poor mid- to high-frequency response in motor emulators, whereas real motors respond instantaneously to voltage changes. As a result, it is challenging for emulators to accurately reproduce the current ripple caused by rapid voltage variations from the drive's chopping behavior. This paper proposes a control method to enhance the mid- and highfrequency response of motor emulators, thereby enabling more accurate simulation of current ripple induced by the switching actions of the tested drive.