Speed monitoring and control for a brushless motor
US6128436A · kind A · utility
10Cited by
13References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1998 |
| Grant date | Oct 3, 2000 |
| Priority date | — |
| Expiry date | Aug 3, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A speed monitoring and control method for a brushless motor controlled by a controller which provides switching control signals to a plurality of switching elements includes comparing one line voltage of the motor with a signal representing a voltage at the neutral node of the motor, to generate a comparison signal. The method also includes ANDing the comparison signal with a switching control signal to generate a composite feedback signal representative of a rotational speed of the motor's rotor relative to a speed of a rotating magnetic field generated by the stator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.