Power module for a brushless motor in a power tool
US11811293B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 2020 |
| Grant date | Nov 7, 2023 |
| Priority date | — |
| Expiry date | Mar 3, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K7/209
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power module for driving a motor is provided including a power circuit board, power switches operatively connected to the motor disposed on a first side of the circuit board, and positional sensors disposed on a side surface of the power circuit board facing the motor. The power circuit board includes a thermally-conductive core carrier layer, a first electrically-insulating layer disposed on a first surface of the core carrier layer and on which the power switches are mounted, and a second electrically-insulating layer disposed on a second surface of the core carrier layer and on which the positional sensors are mounted. The second electrically-insulating layer is etched to expose the conductive core layer on at least approximately 70% of a surface area of the second side of the circuit board.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.