Improvement schemes of control performance for matrix converter

This paper proposes improvement schemes of the voltage control performance for the matrix converter The voltage control performance is deteriorated because of the commutation method, the output voltage error, and the input voltage disturbance such as the input voltage distortion and unbalance, in general. Firstly, two types of the commutation methods are described in this paper The switching loss is compared through simulations, and the converter efficiency is compared through experiments on the two methods. Secondly, the output voltage error is analyzed and an error compensation scheme is proposed in this paper. The experimental results show the THD of the output current can be decreased with the proposed compensation. Finally, in order to decrease the distortion of the output voltage in case of the input voltage disturbance, a novel compensation method for the input voltage disturbance is proposed. The adequacy of the method is proved by simulations and experiments. Motor drive characteristics of a 22kW proto type matrix converter, equipped with the proposed methods, are also shown.