Control unit of direct-current motor
US5559414A · kind A · utility
1Cited by
3References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1995 |
| Grant date | Sep 24, 1996 |
| Priority date | — |
| Expiry date | Mar 24, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P21/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A control unit of a direct-current motor used in a magnetic recording and reproducing device or the like, which generates a digital error signal by processing a rotational frequency signal (a rotational frequency signal and a rotational phase signal when necessary) detected from a motor to be controlled, and furthermore, obtains a digital correction signal by processing the value of the power source voltage and corrects the digital error signal using the correction signal to compensate power source voltage fluctuation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.