Brushless motor for a power tool
US10236742B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 2015 |
| Grant date | Mar 19, 2019 |
| Priority date | — |
| Expiry date | Jun 22, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2213/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power tool is provided including a housing; and an electric brushless DC (BLDG) motor housed inside the housing. The motor includes a motor housing having a substantially cylindrical body and a back plate, the cylindrical body of the motor housing defining a slot at or proximate the back plate; a stator housed within the motor housing; a rotor pivotably arranged inside the stator, the rotor including a rotor shaft, a rotor core rotatably mounted on the rotor shaft and housing rotor magnets therein, and a sense magnet ring affixed to the rotor shaft and having magnets aligned with the rotor magnets; and a positional sensor board having positional sensors mounted thereon, the positional sensor board being received through the slot of the motor housing to dispose the positional sensors in close proximity to the sense magnet ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.