Enhancing surface-mounted permanent magnet synchronous motor drives in steady and transient states through improved MPCC method

摘要

An improved model predictive current control (MPCC) method is developed to be applied to surface-mounted permanent magnet synchronous motor (SPMSM). Here, three control techniques are applied to increase the control precision in the steady state, while dynamic response is improved in the transient state. In steady state, the two control techniques, d- and q-axes currents control (DQ-ACC) technique and q-axis current control (Q-ACC) technique, are designed to enhance the stator current quality. The appropriate voltage space vector (VSV) is selected through the cost function, which is applied to the motor at an optimal time. Calculation of this optimal time is different for each one of these control techniques where the objective is to achieve an appropriate d- and q-axes current qualities. In transient state, the fast q-axis current control (FQ-ACC) technique is designed to obtain a faster dynamic response. The VSV is selected through the cost function and is applied to the motor throughout the control cycle. This proposed control method is implemented on a digital signal processor (DSP) model TM320F28335 to control a 100-w SPMSM. The experimental test results indicate that these proposed techniques in terms of torque, flux, and stator current quality outperform their counterparts with an appropriate dynamic response.