Maximum efficiency controller for IPMSM using single DC link current sensor

In this paper, a maximum efficiency controller with reduced number of current sensor for interior permanent magnet synchronous motor is introduced. This controller offers minimum input power at a given torque and speed under motor parameter uncertainty by minimizing of core and copper losses online. The proposed method is fast and simple requires only measurement of input power to control d axis current component of motor for achieving maximum efficiency. To reduce design cost and improve reliability, three phase current for field oriented control of IPMSM is reconstructed from a single DC link current sensor primarily used for fault protection. Current and speed controller is properly designed for good dynamic performance under parameter uncertainty. This low cost and energy efficient controller is implemented in MATLAB/SIMULINK to verify its effectiveness.