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1. (WO2018079052) APPARATUS FOR CONTROLLING BRUSHLESS MOTOR AND METHOD FOR CONTROLLING BRUSHLESS MOTOR

Pub. No.:    WO/2018/079052    International Application No.:    PCT/JP2017/030825
Publication Date: Fri May 04 01:59:59 CEST 2018 International Filing Date: Wed Aug 30 01:59:59 CEST 2017
IPC: H02P 6/16
Applicants: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
パナソニックIPマネジメント株式会社
Inventors: SATO Daisuke
佐藤 大資
Title: APPARATUS FOR CONTROLLING BRUSHLESS MOTOR AND METHOD FOR CONTROLLING BRUSHLESS MOTOR
Abstract:
This apparatus for controlling a brushless motor is provided with: an inverter circuit which applies a drive voltage to the winding of each phase of a brushless motor; a rotor magnetic pole detecting unit which outputs a magnetic pole detection signal corresponding to the position of a rotor of the brushless motor on the basis of a change in the magnetic pole detected by a Hall sensor; a rotor position estimating unit which outputs an estimated rotor position signal indicating a predetermined electrical angle corresponding to the changed level of the magnetic pole detection signal each time said level changes, the estimated rotor position signal indicating the estimated rotor position as an electrical angle; a current detecting unit which detects, as a power source current value, the current supplied to an inverter circuit; and an electrical angle correction unit which determines an electrical angle offset on the basis of variations in the power source current value, and corrects the estimated rotor position signal by adding the electrical angle offset to the electrical angle indicated by the estimated rotor position signal.