METHOD AND SYSTEM FOR MEASURING THE POSITION OF A MOTOR ROTOR USING FRINGE FIELD, AND STRUCTURE FOR SUPORTING HALL SENSORS FOR THE SAME

摘要

A method and a system for measuring a position of a motor rotor using a fringe field and a structure for supporting a hall sensor are provided to measure the change of the fringe field of a permanent magnet by supporting a hall sensor through a hall sensor auxiliary support and a hall sensor support. An electric motor includes a stator(4) and a rotor(5). The rotor includes a plurality of permanent magnets. A plurality of hall sensors measure the fringe field of a permanent magnet of the rotor and generates an output signal of the electric motor. The plurality of hall sensors includes a hall sensor for a sine wave or a pseudo sine wave and the hall sensor for a cosine wave and a pseudo cosine wave. An electric circuit(16) removes a noise from an output signal of the electric motor. An algorithm processor calculates the rotation position of the rotor of the electric motor by processing the output signal without the noise.