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Title:
SENSORLESS MAGNETIC LEVITATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2001/086159
Kind Code:
A1
Abstract:
A sensorless magnetic levitation device is provided for holding an object or a magnetic object in noncontact manner between a pair of electromagnets. An inverter circuit (X) energizes a bridge circuit consisting of windings (9, 10) of the pair of electromagnets and two 2-terminal networks (11, 12). The potential difference (or short-circuit current) between points (b and d) is detected by a signal detector (13) and fed back to the control input (2) of the inverter circuit through a rectifier (16) synchronized with the switching operation of the inverter and through a controller (15).

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Inventors:
YOSHIDA TOSHIYA (JP)
Application Number:
PCT/JP2001/003831
Publication Date:
November 15, 2001
Filing Date:
May 08, 2001
Export Citation:
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Assignee:
UNIV TOKYO DENKI (JP)
YOSHIDA TOSHIYA (JP)
International Classes:
F16C32/04; F16C39/06; G05D3/12; H02N15/00; (IPC1-7): F16C32/04
Foreign References:
JP2000060169A2000-02-25
JPH08145056A1996-06-04
JPH0614251A1994-01-21
JPH11257352A1999-09-21
Attorney, Agent or Firm:
Miyoshi, Hidekazu (2-8 Toranomon 1-chome, Minato-k, Tokyo 01, JP)
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