A new robust SPMSM control to parameter variations in flux weakening region

A new implementation strategy for the flux weakening control of a surface mounted permanent magnet synchronous motor (SPMSM) is proposed. It is implemented based on the output of the synchronous PI current regulator-reference voltage to PWM inverter. The onset of flux weakening and the level of the d-axis current are adjusted by the outer voltage regulation loop to prevent the saturation of the current regulator. The characteristics of this flux weakening scheme include no dependency on the machine parameters, the guarantee of current regulation on any operating condition, and fast transition into and out of the flux weakening mode. Experimental results at various operating conditions including 4-quadrant operation are presented to verify the feasibility of the proposed control scheme.

[1]  Bimal K. Bose.  A high-performance inverter-fed drive system of an interior permanent magnet synchronous machine , 1987 .

[2]  Thomas M. Jahns,et al.  Flux-Weakening Regime Operation of an Interior Permanent-Magnet Synchronous Motor Drive , 1987, IEEE Transactions on Industry Applications.

[3]  A. K. Adnanes.  Torque analysis of permanent magnet synchronous motors , 1991, PESC '91 Record 22nd Annual IEEE Power Electronics Specialists Conference.

[4]  T.J.E. Miller,et al.  Field-weakening performance of brushless synchronous AC motor drives , 1994 .

[5]  Seung-Ki Sul,et al.  Speed control of interior permanent magnet synchronous motor drive for flux weakening operation , 1995, IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting.