Analysis and Verification of Phase Current Detection Method of Permanent Magnet Synchronous Motor Based on Three Sampling Resistors Configuration

Abstract In the permanent magnet synchronous motor (PMSM) control system, phase current sampling unit is an important part of whole system. Traditionally, hall-effect components are used to detecting currents PMSM. However, size hardware with Hall-effect often large. this paper, a scheme PMSM by using three resistors on main circuit was discussed. order overcome phenomenon that flow discontinuously across resistors, method for reconstructing proposed. Both simulation results and experimental show can be reconstructed successfully high accuracy obtained.