Method of position sensorless control of an electrical machine

摘要

A position sensorless control methodology for electrical machines using high frequency flux vector signal injection in the estimated rotor flux rotational reference frame is provided. In one aspect, the estimated position error function is derived directly from the stator flux equation without any simplification. The method is applicable for electrical generator motoring mode operation from standstill and power generation mode operation.

主权项

1. A method for sensorless position control of an electrical machine, the method comprising:
generating a flux vector reference signal; modulating the flux vector reference signal by injecting a high frequency carrier signal; determining a position error function signal from the modulated flux vector reference signal; estimating a speed of a rotor of the electrical machine based on the position error function signal; estimating an angular position of the rotor from the estimated speed; and applying the estimated rotor speed and the estimated angular rotor position to a controller comprising a processor which, in operation, controls the electrical machine responsive to the estimated rotor speed and the estimated angular rotor position, wherein the flux vector reference signal is generated from a power feedback control signal.