Adaptive Control for SPMSM No Need of Parameter Information but Pole Pairs

The existing noncascaded control schemes for surface-mount permanent magnet synchronous motors (SPMSMs) with stability guarantee inevitably depend on parameter information. To address this problem, we propose a multivariable model reference adaptive control scheme for SPMSM. It does not require parameter information of the SPMSM but pole pairs. The scheme consists of two parts: 1) coordinate transformation and 2) output feedback adaptive control. The coordinate transformation is presented to solve the undesirable effects of unmatched load torque. The output feedback adaptive controller is used to guarantee the stability of the system. Furthermore, the stability proof of the overall system is given in detail. Finally, the effectiveness of the proposed scheme is verified by simulation and experiment.