Application of FPGA to Rotor Position Detection of SR Motor Using Rotary Encoder

Abstract

The Field Programmable Gate Array (FPGA)-based control system for the Switched Reluctance Motor (SRM) drive with a rotor position sensor are designed and constructed. The control algorithm of the SRM requires the information of rotor position. Conventional estimation algorithms of the rotor position are deteriorated by the switching noise of the inverter. Therefore, this paper proposes the new estimation algorithm of the rotor position with suppression mode of noise. The estimation algorithm is based on the state machine which is one of the popular description methods of Very high speed integrated circuit Hardware Description Language (VHDL). The SRM drive using the proposed algorithm is tested with experimental system to confirm the operation.