Electric Motor Emulator with Edge-Triggered Control

This paper presents an Edge-Triggered Control (ETC) strategy for electric motor emulators (EMEs) aimed at reducing switching losses while preserving accurate current emulation under realistic operating conditions. The operating principles, control architecture, and circuit implementation of the ETC-based EME are presented in detail. The effectiveness of the proposed method is verified through both simulations and hardware experiments on a PMSM-based EME under different operating conditions. Experimental results demonstrate that the proposed ETC achieves current control performance comparable to that of a conventional 100-kHz high-frequency switching EME, even without a common-mode choke, while operating at the same switching frequency as the DUT. Furthermore, power measurements confirm a significant reduction in input power consumption and a notable improvement in system efficiency when ETC is applied. These results indicate that the proposed ETC provides an effective solution for high-fidelity motor emulation in motor drive testing applications.