Device for driving an induction motor
US4651078A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 1984 |
| Grant date | Mar 17, 1987 |
| Priority date | — |
| Expiry date | Oct 25, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P23/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a device for driving an induction motor comprising: PA0 a variable converter which converts an alternating current into a direct current; PA0 an inverter device which converts a D-C output of said variable converter into an alternating current; PA0 an induction motor driven by said inverter device; PA0 a speed detector which detects the speed of said induction motor; and PA0 a speed controller which amplifies a reference speed signal input to the inverter device and which provides as an output signal therefrom the difference between the reference speed signal and the speed of the induction motor; PA0 wherein the output of said speed controller is changed depending upon the running speed of the induction motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.