Information Acquisition of Pulsating Voltage for Electric Motor Emulator Applications

A new voltage sensing method, named information acquisition of pulsating voltage (IAPV), is proposed in this article to improve the accuracy of voltage measurement for the electric motor emulator (EME). In the EME, the widely used conventional voltage sensing (CVS) method with low-pass filters and analog-to-digital conversion in digital signal processors (DSP) is susceptible to phase delay and noise. To deal with the disadvantage of the CVS method, the IAPV method is introduced with the pulsating voltage signal digitally transmitted and directly processed by the DSP. Simulations and hardware experiments are performed to validate the proposed IAPV method. Based on the experimental results, the proposed IAPV method can achieve smaller errors by comparing it to the CVS method. It is also applicable in the EME to obtain accurate voltage information.