Sensorless Field Oriented Control of PMSM Drive System for Automotive Application

This paper presents an analysis and hardware implementation of a Sensorless Field oriented control method for Permanent Magnet Synchronous Motor drive using 3-Phase Permanent Magnet Synchronous Low-Voltage Motor Control Drive. The Sensorless Field oriented control Permanent Magnet Synchronous Motor drive system is designed, simulated and implemented using the standard setup by free scale. The experimental setup is designed and implemented based on a six-pole, 2 kW permanent magnet synchronous motor. The 3-ph permanent magnet synchronous motor LV (low voltage) motor control drive board consists of all the required circuitry needed for development of motor control applications. It incorporates a complete 3-phase power stage, a communication interface, feedback signal handling and the user´s interface. Power circuit consists of metal oxide semiconductor field effect transistor based voltage source inverter and gate driver circuit. The control hardware consists of power supplies, resolver demodulation circuit, current sensors and interfacing circuits. The reference speed, rotor speed estimation using sensed position signals, speed controller, reference frame transformation, vector controller and PWM current controller for gating pulse generation of voltage source inverter are implemented using the standard GUI interface of the software where high level language coding is used. The simulated performances along with test results of the permanent magnet synchronous motor drive are studied for starting, steady-state condition, speed reversal and load perturbation. Experimental results show that the drive system has a good dynamic response particularly in terms of torque ripple and speed response.