Method for estimating induced electromotive force and speed of induction motor, method for correcting misalignment of shaft thereof, and induction motor controller
US6242885A · kind A · utility
13Cited by
4References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 30, 1999 |
| Grant date | Jun 5, 2001 |
| Priority date | — |
| Expiry date | Dec 30, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P21/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A three-phase-to-two-phase converter detects two-phase currents of three-phase stator currents, converts the stator currents into a .gamma.-.delta. coordinate system to derive a .gamma.-axis current and a .delta.-axis current. The .gamma.-axis current, the .delta.-axis current, and voltage command values outputted respectively from a .gamma.-axis current controller and a .delta.-axis current controller are entered to a stator current and induced electromotive force estimator, which determines estimated values of the stator currents and estimated values of an induced electromotive force in the .gamma.-.delta. coordinate system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.