Title:
POSITION DETECTION DEVICE AND MOTOR UNIT
Document Type and Number:
WIPO Patent Application WO/2021/186819
Kind Code:
A1
Abstract:
One aspect of a position detection device of the present invention comprises: at least three detection units which include a first magnetic sensor facing a permanent magnet in the axial direction of the rotor of a motor, and a second magnetic sensor facing the stator of the motor in the axial direction, and which are provided along the circumferential direction of the rotor; a calculation unit which calculates a magnetic flux component of the rotor for each detection unit, on the basis of a first detection signal indicating a magnetic flux detection result obtained from the first magnetic sensor and a second detection signal indicating the magnetic flux detection result obtained from the second magnetic sensor; and an estimation unit which estimates the rotation position of the rotor on the basis of the magnetic flux component of the rotor obtained from the calculation unit. In each of the detection units, the first magnetic sensor and the second magnetic sensor are arranged along the radial direction of the rotor.
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| JP2004191261 | MAGNETIC POSITION DETECTING DEVICE |
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Inventors:
MURASE SHUHEI (JP)
Application Number:
PCT/JP2020/046788
Publication Date:
September 23, 2021
Filing Date:
December 15, 2020
Export Citation:
Assignee:
NIDEC CORP (JP)
International Classes:
G01D5/245; H02K11/215; H02K29/08
Foreign References:
| JPS63235812A | 1988-09-30 | |||
| JP2016057215A | 2016-04-21 | |||
| JPS6025381U | 1985-02-21 | |||
| US20190028000A1 | 2019-01-24 |
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