Remote speed controller for a motor
US4659975A · kind A · utility
5Cited by
6References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 3, 1985 |
| Grant date | Apr 21, 1987 |
| Priority date | — |
| Expiry date | Oct 3, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A remote speed controller for an electric motor, the controller comprising a switching unit having three switches. A capacitor pack incorporating two capacitors is connected to the switching unit such that different combinations of the capacitors can be selected by one switch. The controller is connected in circuit between an AC voltage supply and windings of a motor so that selective actuation of the one switch changes the speed of the motor in accordance with the values of the capacitors selected. Further switches are incorporated to provide reverse motor capability and remote sensor capability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.