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Patent Searching and Data


Title:
SOLENOID VALVE DRIVING METHOD AND SOLENOID VALVE DRIVING CIRCUIT
Document Type and Number:
Japanese Patent JPH11311362
Kind Code:
A
Abstract:

To smoothly transfer a solenoid valve from overexcitation driving to holding driving and to speedily reduce a driving electric current at the time of finishing holding driving.

This solenoid valve drive device 1 is devised to hold and drive a solenoid valve 2 after overexcitation-driving the solenoid valve 2 in response to a solenoid valve driving signal S. In this case, a loop to carry out electric power circulation through a third FET 9 provided on a lower arm of a coil 2A is provided, and terminal voltage of the coil 2A is changed by a voltage change-over circuit 100 provided between a gate and a drain of the third FET 9 so that the terminal voltage of the coil 2A at the time of finishing holding driving becomes larger than the terminal voltage of the coil 2A at the time of finishing overexcitation driving.


Inventors:
ADACHI TSUNEO
KONO KOZO
Application Number:
JP12972898A
Publication Date:
November 09, 1999
Filing Date:
April 24, 1998
Export Citation:
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Assignee:
ZEXEL CORP
International Classes:
F16K31/06; (IPC1-7): F16K31/06
Attorney, Agent or Firm:
Masatoshi Takano