Loss Minimization Strategy under Direct Torque Control Method Using Matrix Converter Fed IPMS Motor

Abstract

This paper develops a direct torque control method (DTC) using a matrix converter (MC) fed interior permanent magnet synchronous (IPMS) motor in loss minimization strategy. The nature of the system motors, their loss minimization has attracted much employed as the loss minimization control variable. Thus, the optimal stator flux linkage is determined in a way that the total electrical loss is minimized. Then the optimal flux is considered as the reference flux. The advantages of matrix converters are combined with the advantages of the loss minimization strategy; under the unrestrained of the rotor speed, the required voltage vectors are generated to implement the conventional DTC method of IPMS motor. The proposed DTC algorithm is applied to IPMS motors and the experimental results are given in steady-state and transient conditions, while the discussion that the minimum input power to the motor is about the trend of the DTC method using the MC is also carried out.