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Title:
SOLENOID HIGH SPEED DRIVING DEVICE
Document Type and Number:
Japanese Patent JPH0714458
Kind Code:
A
Abstract:

PURPOSE: To improve the durability and to realize a low cost, as well as to make a stabilized power source unnecessary, by providing a first and a second switching means, a diode, an analog-digital converting means, and a microcomputer.

CONSTITUTION: The voltage value of one system of unstabilized power source 1 for solenoid driving is taken in to a microcomputer 6 by sampling by an A/D converter (converting means) 7, and the duty of the PWM is operated and decided to make the voltage applied to a solenoid 2 in a specific constant voltage at every sampling. Then, an FET 3 (the first switching means) is PWM controlled to make in a specific voltage applied to the solenoid 2, when the solenoid 2 is driven, and an FET 4 (the second switching means) is made ON during this operation. By the ON of the FET 4, a circulating current flows to the solenoid 2 through the diode 5 and the FET 4, during the period the FET 3 is OFF in the PWM operation section, and a continuous current flows to the solenoid 2 adding to the driving current during the means 3 is ON, so as to realize a high speed driving stably.


Inventors:
IWAI RYUICHIRO
KIMURA SHINSUKE
Application Number:
JP15323093A
Publication Date:
January 17, 1995
Filing Date:
June 24, 1993
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H01H3/28; H01F7/18; H01H5/02; (IPC1-7): H01H3/28; H01H5/02
Attorney, Agent or Firm:
Akira Kobiji (2 outside)



 
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