INDUCTIVE LOAD DRIVING DEVICE AND DRIVING METHOD

WIPO Patent Application WO/1998/000637

A1

An inductive load driving device and a method for driving the same device in which the rise of load current at an initial stage of driving can be executed at high speed. To this end, the device comprises a plurality of step-up circuits (21, 31) for alternately applying a high voltage to the same inductive load within a predetermined period of time to thereby allow a load current to rise at high speed respectively, a holding current output circuit (43) for applying a predetermined voltage to the same inductive load after the load current has risen to thereby hold the load current at a predetermined value, a plurality of switching means (46, 47) adapted to be switched in such a manner that the respective outputs of the plurality of step-up circuits (21, 31) and the holding current output circuit (43) can alternatively connected to the same inductive load, and a control logic circuit (44) for switching the plurality of switching means (46, 47) in a predetermined sequence.

SAKASAI TAKASHI (JP)
AKAGI JIRO (JP)
YOSHIDA DAISUKE (JP)

PCT/JP1997/002245

January 08, 1998

June 27, 1997

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KOMATSU MFG CO LTD (JP)
SAKASAI TAKASHI (JP)
AKAGI JIRO (JP)
YOSHIDA DAISUKE (JP)

F02M45/04; F02D41/20; F02D41/30; F02M51/04; F02M57/02; H02P8/10; H01F7/18; (IPC1-7): F02D41/20; F02D41/38; F16K31/06; H02P8/00

JPH03275957A	1991-12-06
JPH04500399A	1992-01-23
JPH02119652A	1990-05-07
JPS61241438A	1986-10-27
JPH06159184A	1994-06-07
JPH09217641A	1997-08-19
JPH09148172A	1997-06-06
JPH0989147A	1997-03-31
JPH0779597A	1995-03-20
JPH0654590A	1994-02-25
JPS59155899U	1984-10-19

Hashizume, Yoshihiko (8F 3-6, Akasaka 2-chom, Minato-ku Tokyo 107, JP)

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