Control of interior type PM synchronous motor for high speed operations

This paper presents a novel fuzzy logic controller (FLC) based high speed operation of an interior permanent magnet synchronous motor (IPMSM) for high performance industrial drive applications. In the proposed control scheme for high speed operations above the rated speed, the operating limits of IPMSM are expanded by incorporating the maximum torque per ampere (MTPA) operation in constant torque region and the flux-weakening (FW) operation in constant power region. The power ratings of the motor and the inverter are considered in developing the control algorithm. A new and simple FLC is developed to utilize as a speed controller. The FLC is developed to have less computational burden, which makes it suitable for realtime implementation, particularly at high speed conditions. The complete drive is implemented in real-time using digital signal processor (DSP) controller board DS 1102 on a laboratory 1 hp motor. The efficacy of the proposed control scheme is evaluated by both experimental and simulation results. The proposed controller is found to be a robust for high speed applications