Patent ID: 11860003
Assignee: NIDEC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 4:
5. A method for signal processing comprising:
a signal detection step in which N (where N is an integer of 3 or more) sensors each detect a magnetic field which is in accordance with a position of a mover and output a detection signal as an electrical signal, the detection signals being displaced in phase by an angle obtained by dividing 360 degrees by N;
a first correction step in which a correction section consecutively selects one of the detection signals at each control cycle for detecting the magnetic field, and subtracts a mean value of the other unselected detection signals from the selected detection signal, thereby generating, for each detection signal, a detection signal into which the selected detection signal has been corrected.