Control device, optical apparatus, control method, and storage medium
US10461675B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 9, 2018 |
| Grant date | Oct 29, 2019 |
| Priority date | — |
| Expiry date | May 9, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P8/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control device includes at least one processor which functions as an advance angle detection unit, a storage unit configured to store information indicating a plurality of loci each indicating a relationship between the advance angle and a rotation speed of a rotor at each driving voltage, a target advance angle calculation unit configured to calculate a target advance angle based on the information, an advance angle control unit, a voltage control unit, and a switching unit configured to switch between a first control state for setting a target rotation speed by controlling the advance angle along one locus among the plurality of loci and a second control state for setting the target rotation speed by controlling the voltage in a state where the advance angle is fixed, according to the locus, the target advance angle, and the driving voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.