Thermally responsive protection apparatus for electric motors
US6384497B1 · kind B1 · utility
1Cited by
17References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2000 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Aug 15, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K11/25
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A thermal protection mechanism for electric motors includes a pair of spaced contacts secured to an electrically insulating carrier having a cavity and a surface adjacent to a motor winding. The surface of the carrier has an aperture that forms a thermal passage between the surface of the carrier and the cavity. The contacts are engaged with a fusible electrically conductive pin made of solder that is disposed within the cavity and that interposes along a current path to the windings of a motor. A high winding temperature causes the pin to fuse, thereby terminating operation of the motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.