A map holding unit holds, in the form of a map, a voltage control amount of the q axis in a case where no demagnetization of a permanent magnet motor occurs. Based on a motor revolution number, namely the number of revolutions of the motor provided from a revolution number detection unit, a demagnetized...http://www.google.fr/patents/US7531982?utm_source=gb-gplus-shareBrevet US7531982 - Motor drive apparatus capable of accurately estimating demagnetization of permanent magnet motor
Motor drive apparatus capable of accurately estimating demagnetization of ...
