Optimization of magnetizing current in linear induction motors

Details Optimization of magnetizing current in linear induction motors Optimization of magnetizing current in linear induction motors

1996-11-07

1999-04-27

Nappi, Robert

Elevator, industrial lift truck, or stationary lift for vehicle

With barrier for regulating access to load support

Includes motor or motor driven linkage for shifting barrier

187317, 318807, 318687, B66B 1314, G05B 1112

Patent

active

058969519

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.

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patent: 5691591 (1997-11-01), McCann
EPC Search Report for Serial No. 97308739.8-2207 dated Feb. 19, 1998.
Linear induction Motors as `electromagnetc rivers`, J.F. Eastham and E.R. Laithwaite, undated.

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