Field Weakening Control of Pmsm
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Date
2005-01
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Addis Ababa University
Abstract
This master thesis deals with control of PM motor with field weakening capability for
electric vehicle (EV) application .A PMSM motor model has been analyzed in a drive able
to control the motor both in the constant-torque (constant flux) and in the constant-voltampere
(flux weakening) regions.
Today’s motor for traction in electric vehicle are most often induction motors. In recent
years, PM-motors have become attractive due to their high efficiency. This is very
important in battery applications.
The first part of the project consists of a literature survey that aims at building knowledge
on machine theory for field weakening. An analytical model for PMSM is developed there
upon.
An explanation of field weakening and the field orientation concepts implemented in the
PMSM are presented. Finally, performance of field weakening control for PM machines
with results is presented.
Key words
PMSM, field weakening, electric vehicle
Description
Keywords
PMSM, Field weakening, Electric vehicle