The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 06, 1986
Filed:
Mar. 25, 1985
Gunter Steinmetz, Train, DE;
Gerhard Bohn, Munich, DE;
Abstract
The levitating force of the levitation magnets of a magnetically levitated ehicle of the linear stator type is controlled for regulating the air gap width (S) between these levitation magnets (2) and a rail track having teeth of uniform, determined width in the travel direction. The control is responsive to the air gap width and, if desired, to the differentiation of the air gap width with respect to time. The control requirements are dependent on the vehicle speed, whereby in the low speed and stopping situations the primary task is a stabilizing one and in higher speed situations the primary task is a good following behavior. For this purpose a steering signal is derived from the output terminals of an induction conductor loop located in the surface of a pole piece of a levitation magnet facing the track teeth. The loop has a width corresponding to the tooth width. The frequency of the signal induced in the loop is directly proportional to the vehicle speed. The steering signal passes through an adapting circuit and is supplied to the magnet control circuit whereby the control parameters are adjusted according to the vehicle speed in order to fulfil the control requirements in the whole speed range.