Utility power supply based on indirect matrix converter for electromagnetic stirrer

Indirect matrix converter (IMC) has some attractive advantages compared to back-to-back PWM converters and conventional matrix converters. In this paper, indirect matrix converter is applied to feed electromagnetic stirrer (EMS) as a utility power supply. According to the technical requirements by electromagnetic stirrer, the output current of power supply should be controlled with high precision and fast dynamic response both in magnitude and frequency. Hence, a output current control method based on vector control technique is developed in this paper, which is realized together with the SVPWM of indirect matrix converter. Simulations using MATLAB verify the effectiveness of the developed control methods. Some experimental results validate the practical feasibility of this power supply.