DC brushless motor system with capacitors
US6335598B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2000 |
| Grant date | Jan 1, 2002 |
| Priority date | — |
| Expiry date | Apr 7, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/16
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a brushless motor system. The brushless motor system has a brushless motor, a motor driver, and at least one sensing circuit. The brushless motor has a rotor, and the sensing circuit is used to detect the rotor position. The sensing circuit has a Hall sensor and two capacitor devices. The Hall sensor has two output ports. As the rotor rotates, the Hall sensor will generate a sensing signal at each of the two output ports. Each of the capacitor devices is connected in series to one of the two output ports of the Hall sensor, and the two capacitor devices are used to filter out DC biases in the two sensing signals. The motor driver is connected to the two capacitor devices for driving the rotor of the brushless motor according to the two sensing signals from the two capacitor devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.