Method for stopping an electric motor
US4862052A · kind A · utility
20Cited by
16References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1988 |
| Grant date | Aug 29, 1989 |
| Priority date | — |
| Expiry date | Mar 8, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P3/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric motor is braked by sensing the polarity of voltage of the alternating electricity for powering the motor and sensing the polarity of the voltage induced in the motor by the back electromotive force. When these polarities are opposite the electricity is applied to the motor to generate a braking torque. The application of the electricity is stopped a given interval after it begins to be applied during consecutive voltage cycles. This interval is derived from the time period between when braking commenced to when the electricity was applied during consecutive cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.