Electric drive motor for a work apparatus
US9143020B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2013 |
| Grant date | Sep 22, 2015 |
| Priority date | — |
| Expiry date | Apr 7, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K3/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric drive motor for a work apparatus includes a stator having two stator poles which are at a distance from one another in the circumferential direction and have respective field windings. The motor has a rotor which rotates between the stator poles and the rotor shaft of the rotor drives a fan wheel. The cooling-air flow generated by the fan wheel enters the stator, flows therethrough and is discharged therefrom. For effective cooling, a pole intermediate space is provided between the stator poles; and, for the cooling-air flow, this space is filled by a non-magnetic guide body to provide a cooling duct delimited by the guide body and the field windings. The guide body is fastened to a support at one stator end and is inserted axially into the stator at the other end thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.