Drill with solid state speed control
US7487844B2 · kind B2 · utility
42Cited by
64References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 3, 2006 |
| Grant date | Feb 10, 2009 |
| Priority date | — |
| Expiry date | Nov 3, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/937
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A power tool includes solid-state motor control. The tool includes a solid state variable speed control signal generator for generating a variable speed control signal, a microcontroller for generating a pulse width modulated (PWM) signal corresponding to the variable speed control signal, a driver circuit for generating H-bridge driving signals corresponding to the PWM signal, and an H-bridge circuit for selectively coupling a motor to a power source in accordance with the H-bridge driving signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.