Free wheeling motor fan
US10594188B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2014 |
| Grant date | Mar 17, 2020 |
| Priority date | — |
| Expiry date | Feb 2, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/108
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor assembly includes a shaft, an electric motor operatively connected to the shaft to drive the shaft in a first rotational direction, a clutch assembly connected to the shaft, and a fan connected to the clutch assembly and configured to supply the electric motor with cooling air. The clutch assembly drives the fan when the electric motor drives the shaft and allows the fan to freewheel in the first rotational direction when the electric motor is not driving the shaft. A method of operating a fan cooled electric motor includes energizing the electric motor to drive a shaft in a first rotational direction using the electric motor and de-energizing the electric motor so that it no longer drives the shaft, allowing the fan to freewheel in the first rotational direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.