Device for controlling the torque of an asynchronous electric motor by controlling the phase of the motor stator voltage
US5317246A · kind A · utility
4Cited by
6References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 24, 1992 |
| Grant date | May 31, 1994 |
| Priority date | — |
| Expiry date | Nov 24, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P21/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A device controls the torque of an asynchronous electric motor by controlling the phase of the motor stator voltage relative to a motor flux on the basis of a set point for the quadrature component of the stator current in a frame of reference related to the flux in turn derived from the motor torque set point. The device includes a first difference detector for detecting any difference between the set point and the current value of the quadrature component and a first regulator operating on the basis of the difference to provide the phase value to be applied to the motor to reduce the difference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.