Control and operation of brushless continuous torque toroid motor
US4746844A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1986 |
| Grant date | May 24, 1988 |
| Priority date | — |
| Expiry date | Jul 16, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Novel winding arrangements and control circuits for brushless direct-current motors are described. Stator windings are arranged to produce an essentially continuous torque in each winding phase from D.C. current pulses each of about one-half the duration of a two-pole cycle or rotor movement. An electronic control circuit comprises one electronic power switch for each winding group or winding phase in the stator windings. One or two D.C. current pulses are applied to the windings for each two-pole cycle of rotor movement, depending on the arrangement of the coils. CEMF voltage generated in the coils is sensed and a change in the polarity thereof is used to control switching of the D.C. current between coils.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.