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Sensorless magnetically levitated system with reduced observer

Abstract

The present paper describes the use of a reduced observer for a hybrid excited magnetic levitation system. The latter is part of a contactless and energy saving driven conveyance system. Thereby one has to select the working point of the system in such a way, that the force due to the weight of the vehicle including its load will be compensated only by the permanent magnets. The linearized model is observable even if only the current in the coils is measured. Therefore it seems reasonable to evaluate the other variables of the state vector by an observer. Thus the sensors for the airgap can be omitted. Using an observer has another advantage as well. It will tune the airgap automatically to the value which is necessary in order to operate the system in the most energy saving way. The whole design was simulated. (orig.)
Authors:
Friedrich, T; [1]  Henneberger, G; [1]  Ress, C [1] 
  1. Inst. fuer Elektrische Maschinen, RWTH Aachen (Germany)
Publication Date:
Dec 31, 1995
Product Type:
Conference
Report Number:
CONF-951120-
Reference Number:
SCA: 320202; PA: DE-97:0G0341; EDB-97:014079; SN: 97001718061
Resource Relation:
Conference: International conference on magnetically levitated systems, 14. internationale Tagung ueber Magnetschwebesysteme, Bremen (Germany), 26-29 Nov 1995; Other Information: PBD: 1995; Related Information: Is Part Of MAGLEV `95. 14th international conference on magnetically levitated systems. Proceedings; PB: 509 p.
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; LEVITATED TRAINS; PERMANENT MAGNETS; SIMULATION; LEVITATION; RAPID TRANSIT SYSTEMS; DESIGN; MAGNETIC PROPERTIES
OSTI ID:
412490
Research Organizations:
Verband Deutscher Elektrotechniker e.V. (VDE), Frankfurt am Main (Germany); Energietechnische Gesellschaft im VDE, Frankfurt am Main (Germany)
Country of Origin:
Germany
Language:
English
Other Identifying Numbers:
Other: ISBN 3-8007-2155-4; TRN: DE97G0341
Submitting Site:
DE
Size:
pp. 159-162
Announcement Date:

Citation Formats

Friedrich, T, Henneberger, G, and Ress, C. Sensorless magnetically levitated system with reduced observer. Germany: N. p., 1995. Web.
Friedrich, T, Henneberger, G, & Ress, C. Sensorless magnetically levitated system with reduced observer. Germany.
Friedrich, T, Henneberger, G, and Ress, C. 1995. "Sensorless magnetically levitated system with reduced observer." Germany.
@misc{etde_412490,
title = {Sensorless magnetically levitated system with reduced observer}
author = {Friedrich, T, Henneberger, G, and Ress, C}
abstractNote = {The present paper describes the use of a reduced observer for a hybrid excited magnetic levitation system. The latter is part of a contactless and energy saving driven conveyance system. Thereby one has to select the working point of the system in such a way, that the force due to the weight of the vehicle including its load will be compensated only by the permanent magnets. The linearized model is observable even if only the current in the coils is measured. Therefore it seems reasonable to evaluate the other variables of the state vector by an observer. Thus the sensors for the airgap can be omitted. Using an observer has another advantage as well. It will tune the airgap automatically to the value which is necessary in order to operate the system in the most energy saving way. The whole design was simulated. (orig.)}
place = {Germany}
year = {1995}
month = {Dec}
}