Abstract
Abstract: This paper describes a new sensorless speed control method for permanent magnet synchronous mo-tor(PMSM) using direct torque control(DTC). The direct torque control offers fast torque response, lesser hard-ware and processing costs as compared to vector controlled drives. In this paper the current error compensa-tion technique is applied for sensorless speed control of synchronous motor. Through this method, the con-trolled stator voltage is applied to the synchronous motor so that the error between stator currents of the mathematical model and the actual motor can be forced to decay to zero as time proceeds and therefore, the motor speed approaches to the setting value. Especially, any PI controllers are not necessary in this control method. The simulation results indicate good speed and load responses from the low speed range to the high. Keywords: Permanent Magnet Synchronous Motor(PMSM), Direct Toque Control(DTC), Sensorless Speed Control, Current Error Compensation 1. 서 론
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