Device and method for switching in and out a start winding of a single phase ac motor
US11277081B2 · kind B2 · utility
0Cited by
30References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 3, 2017 |
| Grant date | Mar 15, 2022 |
| Priority date | — |
| Expiry date | Apr 3, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A device for switching in and out a start winding of a single phase AC motor using an energizer winding to generate voltage which can be used to power a simple timing switch circuit. The AC voltage is rectified and converted to DC voltage. The DC voltage is then used to drive a normally closed solid state switch to an open state which in turn inactivates a triac connected to the start winding in the motor. The “on time” of the start winding is controlled by a RC circuit that ramps the voltage to the gate of a FET that drives current through the normally closed solid state switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.