VSCF start system motor current estimator
US5047699A · kind A · utility
21Cited by
14References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1989 |
| Grant date | Sep 10, 1991 |
| Priority date | — |
| Expiry date | Jun 26, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02N11/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The problem of excess size and weight resulting from the use of current sensors in a VSCF start system (10) is solved by a motor control (22) which utilizes a current estimator (68) to develop a current feedback value. The current estimator (68) is coupled to a rotor position detector (72) and an input power detector (78) and receives a signal representing motor torque angle to develop a signal representing the estimated current drawn by the motor (12).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.