Title:
POSITION INFERENCE METHOD, POSITION INFERENCE DEVICE, AND AUTOMATIC GUIDED VEHICLE
Document Type and Number:
WIPO Patent Application WO/2022/145075
Kind Code:
A1
Abstract:
One aspect of a position inference method according to the present invention comprises: a learning step for acquiring a learning value which is necessary for inferring a rotation position; and a position inference step for inferring the rotation position of a rotor on the basis of the learning value. The learning step includes a second step for acquiring, as learning values, magnetic field intensities that are indicated by signals which are output from N magnetic sensors and a fourth step for acquiring origin point learning data that shows correspondences between all pole pair numbers and the learning values. The position inference step includes a sixth step for acquiring, as detection values, the magnetic field intensities that are indicated by output signals from the N magnetic sensors and a seventh step for determining, as the initial position of the rotor, one of the pole pair numbers included in the origin point learning data acquired in the learning step, on the basis of the detection values and of the origin point learning data.
Inventors:
ISHIGAMI SHOTA (JP)
Application Number:
PCT/JP2021/022214
Publication Date:
July 07, 2022
Filing Date:
June 10, 2021
Export Citation:
Assignee:
NIDEC CORP (JP)
International Classes:
H02P6/20; H02P6/16
Domestic Patent References:
| WO2020090595A1 | 2020-05-07 |
Foreign References:
| JPH11356088A | 1999-12-24 |
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