Pulse width modulated engine cooling fan motor with integrated MOSFET
US6448676B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 2000 |
| Grant date | Sep 10, 2002 |
| Priority date | — |
| Expiry date | May 18, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K23/66
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric motor 10 includes a motor housing 12 defining an internal cavity 15. A brush card assembly 24, a commutator 26 and an armature assembly 18 are provided in the cavity 15. The commutator 26 cooperates with the brush card assembly 24 to resupply electric current to the armature assembly 18. Permanent magnet structure 44 is provided in the housing 12 to generate a magnetic field to cause rotation of the armature assembly 18. A FET 52 is mounted with respect to the housing 16 so as to be in heat exchange relation therewith. A gate terminal G of the FET is constructed and arranged to receive pulse width modulation output from an electronic control unit 64 which is remote from the motor so as to enable able the motor to operate at more than one speed. A method of integrating a FET in a motor is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.