Research on the Voltage Space Vector Selection of Direct Torque Control

Abstract

In this paper, for direct controlling to stator flux and electromagnetic torque of asynchronous motor, we have made an in-depth study on the voltage space vector selection of direct torque control. We used the method of calculating complex angle of flux linkage to determine the flux linkage position about the sector signals. About the voltage space vector selection and inverter switch state controlling, an effective manner was adopted. Moreover, flux linkage torque observer model, sector judgment model and voltage space vector selection model were established and associated simulation was made. The simulation results confirm the correctness of the model, the feasibility of this approach.