Patent ID: 8901872
Filing Date: 2014-12-02
Classification: H02P

Abstract:
1. A motor controller having a control system for feedback-controlling a moving operation of a motor moving section through use of a detected moving amount of the motor moving section, the motor controller comprising: a plurality of notch filters which are arranged inside the control system and attenuate signal components in an input signal having frequencies which correspond to at least one of the notch filters, each notch filter having a notch frequency; a plurality of oscillation extracting filters which are set with different frequency bands and each of which correspond to a respective one of the plurality of notch filters, for extracting oscillating components from the detected moving amount based upon the set frequency bands; and a plurality of notch controlling sections each corresponding to a respective one of the plurality of notch filters and which are arranged with respect to the plurality of oscillation extracting filters, for detecting the extracted oscillating components from among the plurality of oscillation extracting filters and for controlling respective notch frequencies among the plurality of notch filters to decrease amplitudes of the detected oscillating components, wherein each notch controlling section is in series between the respective one of the oscillation extracting filters and the respective one of the notch filters, wherein each notch controlling section is in parallel with each other, and wherein each notch controlling section operates respectively in parallel so that each notch controlling section controls the corresponding notch filter in accordance with a result of the extraction of the oscillating component by the corresponding oscillation extracting filter.