INTERIOR PERMANENT MAGNET SYNCHRONOUS MOTOR DRIVER DESIGN: FAN LOAD APPLICATION USED IN AIR CONDITIONING SYSTEMS

Interior permanent magnet synchronous motors (IPMSMs) have gained significant popularity for industrial applications such as fans, pumps, and air conditioning system, owing to their high efficiency, power density, low maintenance, quick response, and dynamic performance. For controlling these motors, real-time position and speed data are typically obtained via sensors. However, the associated costs, added weight, increased volume, and potential reliability issues have driven interest in sensorless control methods for IPMSMs. This study aims to enhance the performance and efficiency of an IPMSM designed for automotive air conditioning systems, in which involves the implementation of both motor driver design and sensorless control. The field-oriented control (FOC) method is employed for the speed control of the IPMSM. To maintain low costs and ensure durability and high performance, a Luenberger-type sensorless control method is used. The rotor position and speed information are derived using the Back-EMF method, based on current and voltage data. The IPMSM is driven by a conventional two-level inverter, with the SVPWM technique managing the semiconductor power switches. Experimental results confirm that proposed sensorless control technique of IPMSMs conducted the high performance in industrial fan applications.