Anti-clipping circuit for induction motor drive system
US6018224A · kind A · utility
4Cited by
16References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 10, 1993 |
| Grant date | Jan 25, 2000 |
| Priority date | — |
| Expiry date | Mar 10, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A feedback circuit prevents clipping of the inverter drive signals for a polyphase induction motor. The circuit senses the electromotive force (e.m.f.) of the motor and regulates the slip frequency as a function of the difference between the sensed motor e.m.f. and the DC power supply voltage. When the motor e.m.f. approaches the supply voltage, a voltage controlled oscillator adjusts the slip frequency to reduce the motor e.m.f. and thereby ensure that the motor drive waveforms are not distorted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.