Motor control device
US11437941B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 10, 2020 |
| Grant date | Sep 6, 2022 |
| Priority date | — |
| Expiry date | Nov 28, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/1245
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
According to one embodiment, there is provided a motor control device including an acquisition unit, an AD conversion unit, a calculation unit and a drive control unit. The acquisition unit acquires an analog signal indicating a rotational position of a motor. The AD conversion unit AD-converts the analog signal to generate a digital value. The calculation unit estimates a slope of a waveform of the analog signal by using a plurality of the digital values and obtains an intersection timing at which a straight line corresponding to the estimated slope intersects with a threshold. The drive control unit controls driving of the motor according to a rotation cycle obtained from a plurality of the intersection timings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.