Constant torque induction motor drive system
US4041361A · kind A · utility
38Cited by
2References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 14, 1975 |
| Grant date | Aug 9, 1977 |
| Priority date | — |
| Expiry date | Oct 14, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/72
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An ac induction motor is supplied with variable frequency and amplitude excitation voltage by a power converter. Precise regulation of torque independent of motor parameter changes is achieved by feedback control loops for maintaining at command values constant airgap flux and also the real component of stator current with respect to airgap voltage as measured by a voltage sensor. The real stator current error controls the slip frequency which adjusts to maintain constant airgap power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.