Study on the Simulation for Closed-Loop Control Based on Synchronous Rotating Coordinate for MC

Abstract

A new kind of modulation strategy was put forward for on matrix converter (MC), which output voltage in open-loop control can not be adjusted automatically when a disturbance encountered. This paper presents an improved method which adopts the closed-loop control of the output voltage. First of all, the output voltage can be changed into space vector by coordinate transformation. Then, that compared with the target voltage vector to obtain deviation in order to feedback control. Finally, this paper carried out simulation on device modeling, control strategy and voltage closed loop control method using Matlab. Two kinds of interference, typically, are simulated and analyzed in two control ways, and the result shows that the closed-loop control is better than open-loop control, which has a good control effect for input disturbance.Keywords: MC; voltage closed-loop control; equivalent transformation; space vector modulation (SVM); simulation