Increasing tape velocity by dynamic switching
US9059658B2 · kind B2 · utility
4Cited by
39References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 2, 2008 |
| Grant date | Jun 16, 2015 |
| Priority date | — |
| Expiry date | Dec 17, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P27/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An apparatus for controlling an electric motor is provided. A plurality of switches is provided for controlling a direction of current through motor coils of the electric motor. A brushless motor control circuit is connected to each of the plurality of switches. Responsive to a request to adjust one of an angular velocity and an angular acceleration of the electric motor, the plurality of switches are activated to place the motor coils in a predetermined configuration to maximize torque or reduce a total back electromotive force (BEMF) from the motor coils.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.