Control circuit for a half-wave brushless motor with a surge limiter
US5291105A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1992 |
| Grant date | Mar 1, 1994 |
| Priority date | — |
| Expiry date | Oct 1, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control circuit for a half-wave brushless motor. The control circuit includes n circuit branches, each with an electronic power switch connected in series with the respective winding or phase of the motor across the terminals of a voltage source in parallel to the other n-1 circuit branches, a pilot circuit for providing enabling signals to render the power switches selectively conductive, current recirculation elements for dissipating transient current that flows in each phase of the motor whenever the associated power switch is turned off, and a voltage limiter for limiting, to a predetermined threshold voltage, the voltage surge due to the transient current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.