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Title:
MAGNETIC LEVITATION SLIDER
Document Type and Number:
Japanese Patent JPH06197415
Kind Code:
A
Abstract:

PURPOSE: To provide a magnetic levitation slider in which a slider can be levitated stably irrespective of the time of no-loading and loading.

CONSTITUTION: A feedback voltages from levitation gap sensors 2a, 2b are compared with a reference voltage from a slider levitation position reference voltage generator 31 by a comparator 32, its differential voltage is amplified by a deviation amplifier 33, and a phase delay of a control system is compensated by a phase compensator 34. Gains are varied at the times of loading and no-loading, levitation electromagnets 1a, 1b power amplified by a power amplifier 35 are driven to reduce the gain at the time of no-loading to decrease dynamic stiffness and to enhance the gain at the time of loading to increase the stiffness, thereby improving stability.


Inventors:
KINOSHITA YOICHI
Application Number:
JP34647192A
Publication Date:
July 15, 1994
Filing Date:
December 25, 1992
Export Citation:
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Assignee:
NTN TOYO BEARING CO LTD
International Classes:
B60L13/06; B25J9/00; B65G54/02; (IPC1-7): B60L13/06; B25J9/00; B65G54/02
Attorney, Agent or Firm:
Fukami Hisaro (2 outside)