Brushless DC motor assembly
US6069428A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 21, 1998 |
| Grant date | May 30, 2000 |
| Priority date | — |
| Expiry date | Jan 21, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K11/33
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A brushless dc motor assembly including control electronics for allowing variable speed, user-controlled motor operation. The control electronics are connected to a control board which is mounted directly to the motor bearing bracket. Hall effect devices for providing rotor rotational position information to the electronics are connected directly to the control board and extend therefrom to a position adjacent the rotor. The electronics control current through the stator winding through a MOSFET H-bridge circuit in dependence of feedback signals from the hall effect devices, a user-controlled enable signal, a motor winding current limit signal, and an under voltage signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.