System for controlling brushless DC motor
US4700116A · kind A · utility
37Cited by
8References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1986 |
| Grant date | Oct 13, 1987 |
| Priority date | — |
| Expiry date | Feb 19, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A brushless DC motor control system comprises a commercially available semiconductor commutator supplying field current to stator windings of the DC motor, a current detector connected to a negative-side terminal of the semiconductor commutator, a signal conversion circuit converting the output signal of the current detector to a signal correlated to the load of the motor, and a microcomputer controlling the semiconductor commutator according to the output signal of the signal conversion circuit in the motor starting mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.