Direct Torque Control of Variable Frequency Speed Regulation of Asynchronous Motor for Intelligent Treadmill
Due to the delay of the intelligent treadmill control system,the running loss of the treadmill is high and the efficiency is low.Therefore,a direct torque control method of variable frequency speed regulation for asynchronous motor of intelligent treadmill is proposed.Analyze the effect of variable frequency speed regulation of asynchronous motor,construct the control con-straints of the treadmill,use the model predictive direct torque control algorithm as the control algorithm of the nonlinear internal controller,estimate the stator flux,predict the stator flux and electromagnetic torque,establish the appropriate objective func-tion,and use the end output control method to obtain the reference value of the stator flux and electromagnetic torque,and com-pensate the delay of the treadmill system,complete the direct torque control of the variable frequency speed regulation of the asyn-chronous motor of the intelligent treadmill.The experimental results show that the amplitude curve of the intelligent treadmill un-der the control of the proposed method has the smallest fluctuation,the electromagnetic torque is between(0.5～1.5)N·m,and the stable operation loss and efficiency are controlled at about 67W and 0.77%,which can effectively reduce the electromagnetic torque ripple of the treadmill,reduce the operation loss,improve the operation efficiency,and have good stability.
Intelligent TreadmillDirect Torque ControlStator Flux LinkageElectromagnetic TorqueModel Predictive Control
NETL
NSTL
万方数据
维普
