Efficient energy recovery in disk drive during power loss
US9780700B2 · kind B2 · utility
2Cited by
5References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2013 |
| Grant date | Oct 3, 2017 |
| Priority date | — |
| Expiry date | Jan 26, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J9/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A back electromotive force of a rotating motor is converted into a voltage for a load by driving, in accordance with a duty cycle, at least one switching circuit that couples the back electromotive force to a load through a rectifying circuit. An error signal is generated that is a difference between the load voltage and a reference voltage. The duty cycle is controlled as a function of the error signal to cause the load voltage to approach the reference voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.