Determination of the phase current waveform for a disc-type axial-flux wheel motor
Resource
Asian Journal of Control 5 (2)
Journal
Asian Journal of Control
Journal Volume
5
Journal Issue
2
Pages
287-292
Date Issued
2003
Author(s)
Abstract
ABSTRACT An optimal design of the driving current pattern for a disc‐type axial‐flux brushless DC wheel motor of an electric vehicle is proposed in this paper. The electro‐magnetic dynamic model of the motor is established with magnetic circuits, describing the relationship between the output torque and excitation current. The optimal current pattern, in terms of magnitude and phase angle, is then obtained by maximizing the output torque with respect to the rotor shift. Compared with the traditional three‐phase‐on current pattern of fixed 120–degree phase shift, both the average torque and efficiency with the driving current of an optimal advanced switching angle are seen to be improved under various loading conditions. The motor performance with the optimal driving waveform is simulated and verified by experiments.
SDGs
Type
journal article