Based on Direct Torque Control of Induction Motor Improvement Method

An improved technology based on space vector modulation direct torque control algorithm(SVMDTC)was presented,which is used in induction motor control system.This method is based on control of slip speed and decoupled between amplitude and angle of reference stator flux for determining required stator voltage vector.Within the given sampling time,flux as well as torque errors are controlled by stator voltage vector which is evaluated from reference stator flux.The direct torque control is achieved by reference stator flux angle which is generates from instantaneous slip speed angular frequency and stator flux angular frequency.Finally,the proposed control scheme is verified by Matlab simulation and experiment,which shows that the method is more robust in the induction motor control system,can effectively reduce the error and harmonic.