IMPROVEMENT OF EFFICIENCY OF AN FLC BASED IPMSM DRIVE BY INCORPORATING LOSS MINIMIZATION ALGORITHM

Mohammad N. Uddin and Ronald S. Rebeiro

Keywords

Efficiency optimization, fuzzy logic controller, interior permanentmagnet synchronous motor, loss minimization, motor dynamic performance, vector control

Abstract

This paper presents an online loss minimization algorithm (LMA) for a fuzzy logic controller (FLC)-based interior permanent magnet synchronous motor (IPMSM) drive to yield high efficiency and high dynamic performance over wide speed range. The LMA is developed based on the motor model. In order to minimize the controllable electrical losses of the motor and thereby maximize the operating efficiency, the d-axis armature current is controlled optimally according to the operating speed and load conditions. For vector control purpose, an FLC is used as a speed controller which enables the utilization of the reluctance torque to achieve high dynamic performance as well as to operate the motor over a wide speed range. The LMA is incorporated with the FLC so that the motor can operate over a wide speed range while maintaining the high efficiency. A performance comparison of the FLC-based IPMSM drive with and without LMA is provided. Simulation results demonstrate the higher efficiency and better dynamic response of the FLC with LMA-based drive as compared to the FLC-based drive without LMA over a wide speed range.

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