Patent ID: 6163127
Filing Date: 2000-12-19
Classification: B60L,H02P,Y02T

Abstract:
A control system for controlling a permanent magnet motor having a rotor and a stator, comprising:synchronous current regulation apparatus coupled to a source of power for receiving a motor drive control signal;synchronous-to stationary coordinate transform apparatus for transforming output voltage signals derived from the synchronous current regulation apparatus into stationary voltage signals;a voltage source inverter for processing the stationary frame duty cycle signals derived from the synchronous-to stationary coordinate transform apparatus to control the permanent magnet motor; anda controller for determining the magnetic saliency of the rotor of the interior permanent magnet motor to estimate the absolute position of the rotor when the rotor operates at low speed, and for processing an estimate of the stator flux angle and the torque load angle to estimate the position of the rotor when the rotor operates at high speed.