Speed and Torque Control Challenge of PMSM

This paper presents modeling and implementation Challenge of speed toqrue rotor field oriented control of permanent magnet synchronous machine (PMSM)drive. An experimental setup consisting of IGBT inverters and a -TMS320LF240 DSP based digital controller is developed in the laboratory in IIT Kharagpur to implement the control algorithms. A voltage model based flux observer is used for estimating the speed and position of PMSM. In order to get good starting characteristics a rotor initial position algorithm is also implemented in the control algorithm. For control purpose PMSM is consider like dc motor. The torque and speed in the dc motor can be controlled independently by controlling armature current and field current respectively ensures that dc motor has good dynamic performance.