Real-time implementation of multiple feedback loop control for a permanent magnet synchronous motor drive

Permanent magnet synchronous motor drives are widely used in high performance applications. In these applications, the drive speed should fellow accurately a certain command trajectory and recover from sudden load disturbances very quickly. The systematic design procedures for both speed and current controllers have been presented. A speed controller using a synchronous reference frame PI regulator is employed as an outer loop. Moreover, two synchronous frame PI regulators are employed as inner loops to control the direct and quadrature axis current components of the motor. The complete drive has been implemented in real-time using digital signal processor (DSP) board DS-1102. The performance of the drive has been investigated by simulation as well as experimental results. The results have proved the superior performance and robustness of the proposed controllers.