Induction motor control
US4470001A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1981 |
| Grant date | Sep 4, 1984 |
| Priority date | — |
| Expiry date | Jun 9, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P1/26
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An induction motor operating system having a pulse width modulation operating system and a time domain signal generating system. The induction motor is operated from the time domain system to provide extremely large motor starting forces compared to the nominal motor force. Opposite ends of each of first, second and third motor windings are connected across a D.C. power supply and individual power supply. Waveforms are supplied to said respective motor windings during a predetermined brief interval. The first waveform, supplied to a first winding, is configured such that current initially flows through the first winding to establish a first magnetic field in the motor. The second and third waveforms are configured so that current is supplied to the second and third windings after establishment of the first magnetic field to establish second and third magnetic fields reacting with the first magnetic field to create a motive force acting on the moving element of the motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.