DSP-Based Three-Phase Asynehonous Motor Direct Torque Control Research And Application

A DTC controlling three-phase asynehronous motor drive system that uses TMS320F2407 DSP as its core is designed in this paper.From the working principle of three-phase asynehronous motor start,this paper depthly analyses the relationship between voltage vector and flux and torque in DTC system, introduces the flux and torque control methods and gives the optimal voltage vector selection program. After verifying system's eorreetness by MATLAB simulation, A method of control the torque current of the parallel startup aiming at the big starting current is give and chieves the purpose of reducing the starting current. The experiment of three-phase asynchronous motor using the hardware circuit which adopt the TMS320F2407 DSP as control core is carried out, the system software and hardware implementations are detailed, its results testify the validity and the Practieality of the design.