Drive wave form synchronization for induction motors
US6348775B1 · kind B1 · utility
31Cited by
3References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 11, 2000 |
| Grant date | Feb 19, 2002 |
| Priority date | — |
| Expiry date | May 11, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K29/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A polyphase induction motor is operated by an inverter drive system comprising a logic level controller. A number, preferably twelve or more, of independently driven phases causes harmonic fields, up to a number equal to the number of phases, to oscillate in synchrony with the fundamental oscillating field. A pulse-width modulation (“PWM”) carrier is used by the logic level controller to synthesize a desired drive alternating current, in which the pulsing distortion produced by the pulse width modulation produces a synchronous oscillating field in the driven polyphase induction motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.