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

Abstract

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 regulatorreference 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.

Flux weakening control of permanent magnet machine based aircraft electric starter-generator

“…Among them is the voltage magnitude control strategy [6], [8]-[ [9]], where the reference flux current is directly controlled by the voltage controller while the torque current reference dynamically limited in order to satisfy the current limit Imax. The voltage controller is applied to provide the phase angle of the PMM reference current vector [11], however it is designed for motoring mode only.…”

“…In [12], modifications to this control are proposed to achieve smooth transition. However, the focus of [7][8][9][10][11][12] was on motoring mode. This paper reports a detailed analysis and control design of FW control for PMM-based starter-generator addressing both generating and motoring modes.…”