Optimization of magnetizing current in linear induction motors
US5896951A · kind A · utility
4Cited by
7References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1996 |
| Grant date | Apr 27, 1999 |
| Priority date | — |
| Expiry date | Nov 7, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/64
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Magnetizing current generated in a linear induction motor driving elevator car doors in elevator systems is optimized. Magnetizing current level is set low for door operation modes requiring lower levels of thrust, such as hold open and hold closed. Magnetizing current level is increased for modes of door operation requiring greater thrust levels, such as closing or opening. Optimization of magnetizing current in linear induction motors reduces overheating and increases energy efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.