Electromagnetic performance analysis and vector control of a flux‐controllable stator‐permanent‐magnet brushless motor with skewed rotor

Abstract

Purpose

The purpose of the paper is to model, analyze and control a new flux‐controllable stator‐permanent‐magnet brushless (PMBL) motor with skewed rotor.

Design/methodology/approach

A new flux‐controllable stator‐PMBL motor with skewed rotor is presented. The key of the proposed motor is to incorporate both direct current field windings and permanent magnets in the stator. By using a 2D multi‐slice finite element model, the electromagnetic performances such as flux linkage, self‐inductance and back‐EMF are obtained. To minimize the torque ripple, a vector control strategy is applied to the stator‐PMBL motor drive for the first time.

Findings

Some encouraging experimental results such as lower torque ripple and faster speed transients are achieved. It is shown that the three‐phase flux‐controllable stator‐PMBL motor, when properly designed and controlled, is an interesting candidate for traction drive systems especially for electrical vehicle operation.

Originality/value

The control method can also contribute the other type of stator‐PMBL machines to realize the low torque ripple.

Citation

Cheng, M. and Zhu, X. (2011), "Electromagnetic performance analysis and vector control of a flux‐controllable stator‐permanent‐magnet brushless motor with skewed rotor", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 30 No. 1, pp. 62-71. https://doi.org/10.1108/03321641111091430