Title:
APPARATUS FOR CONTROLLING BRUSHLESS MOTOR AND METHOD FOR CONTROLLING BRUSHLESS MOTOR
Document Type and Number:
WIPO Patent Application WO/2018/079052
Kind Code:
A1
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.
Inventors:
SATO DAISUKE
Application Number:
PCT/JP2017/030825
Publication Date:
May 03, 2018
Filing Date:
August 29, 2017
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
H02P6/16
Foreign References:
| JPH08308292A | 1996-11-22 | |||
| JP2015050789A | 2015-03-16 | |||
| JP2001008487A | 2001-01-12 | |||
| JP2000209888A | 2000-07-28 | |||
| JP2010011637A | 2010-01-14 |
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
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