Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Including means for using – or compensating for – the induced...
Patent
1989-05-12
1991-07-30
Pellinen, A. D.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Including means for using, or compensating for, the induced...
361189, 363 56, H01H 4700
Patent
active
050364227
ABSTRACT:
A driving circuit for driving a solenoid pump or the like, wherein a driving current supplied from a rechargeable battery 1 is alternately switched to on and off when flowing in an inductive element 2. The inductive element produces a driving force applied to the solenoid pump when the driving current flows therein. The inductive element generated a counter-electromotive force when the driving current flowing therein is interrupted. An accumulating circuit comprising a capacitor 5 is connected to the inductive element to accumulate the counter-electromotive force, and a releasing circuit 4 is connected to the accumulating circuit to release the counter-electromotive force accumulated in the accumulating circuit. The counter-electromotive force released from the releasing circuit produces a superfluous driving current and the latter current is superposed on the driving current supplied form the battery. The driving circuit thus configured reduces power consumption as well as eliminates the influence of the counter-electromotive force on the power source, thus preventing deterioration of the power source and elongating its service life. In addition, a single power source makes the driving circuit compact in size and light in weight.
REFERENCES:
patent: 4168477 (1979-09-01), Burchall
patent: 4318155 (1982-03-01), Thomas
patent: 4392172 (1983-07-01), Foley et al.
patent: 4704655 (1987-11-01), Yamauchi et al.
Uchida Akito
Uehara Daiji
Gaffin Jeffrey A.
Kabushiki Kaisha Nagano Keiki Seisakusho
Pellinen A. D.
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