Rotation angle detecting method, recording medium storing rotation angle detecting program, and rotation angle detecting device
US12206352B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2023 |
| Grant date | Jan 21, 2025 |
| Priority date | — |
| Expiry date | Oct 11, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P21/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotation angle detecting method includes measuring a current flowing through a motor, and obtaining a rotation angle of the motor based on a value of the measured current. The obtaining of the rotation angle of the motor includes obtaining the rotation angle in an inertial rotation of the motor based on a rotational angular velocity of the motor immediately before a first time point, a time period from the first time point to a second time point, and a time period from the second time point to a third time point. The first time point is a time point at which driving of the motor is stopped, the second time point is a time point at which a polarity of the value of the measured current is inverted, and the third time point is a time point at which the value of the measured current becomes zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.