Driving methods and driving circuits for brushless DC motors without rotor position sensors
US5166583A · kind A · utility
19Cited by
11References
9Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Nov 30, 1990 |
| Grant date | Nov 24, 1992 |
| Priority date | — |
| Expiry date | Nov 30, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A sensorless and brushless DC motor in which phase-corresponding coils are turned on at an electric angle of 180.degree.. The driving circuit of the DC motor includes comparators for outputting position detection signals, comparators for outputting turn-on signals, power transistors for turning on phase-corresponding coils, a rotation direction control section, a charge/discharge control section, a charge/discharge section, a turn-off signal generating section, and transistors for forcedly turning off the power transistors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.