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Patent Searching and Data


Title:
DEVICE FOR CONTROLLING CURRENT APPLICATION TO INDUCTANCE COIL
Document Type and Number:
WIPO Patent Application WO/1992/021176
Kind Code:
A1
Abstract:
A device for accurately controlling the current application to an inductance coil without any time lag. Connected to the terminal of an inductance coil (1) on the negative electrode side of a power supply is a semiconductor switching device such as a transistor (3), and thereby, a chopper circuit for supplying an exciting current proportional to a reference voltage is formed. By the magnetic energy when the current application to the inductance coil (1) is cut off, a capacitor (5) of a small capacitance is charged. Thereby the voltage is raised and the falling of the exciting current is made rapid. On starting the current application, the rise of the exciting current is made rapid by virtue of the high voltage of the capacitor (5). Therefore, the exciting current is precisely proportional to the reference voltage.

Inventors:
BAHN ITSUKI (JP)
Application Number:
PCT/JP1992/000641
Publication Date:
November 26, 1992
Filing Date:
May 19, 1992
Export Citation:
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Assignee:
SEKOH GIKEN KK (JP)
International Classes:
F16C32/04; H02P21/05; H02P23/00; H02P23/04; H02P23/07; H02P25/022; H02P25/04; H02P25/08; H02P25/098; H02P25/10; H02P29/40; (IPC1-7): H02P7/00
Foreign References:
JPS57122696A1982-07-30
JPS53129809A1978-11-13
Other References:
See also references of EP 0569588A4
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