Patent · US Active

Solenoid valve driving circuit and solenoid valve

US7903383B2 · kind B2 · utility

31Cited by
8References
18Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJun 17, 2008
Grant dateMar 8, 2011
Priority date
Expiry dateSep 15, 2029

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH01F2007/1888
  • WIPO fieldElectrical machinery, apparatus, energy
  • WIPO sectorElectrical engineering

Abstract

A current detection circuit generates a pulse signal Sd based on a voltage Vd corresponding to a current I flowing through a solenoid coil, and feeds the pulse signal Sd back to a PWM circuit of a switch controller. The PWM circuit generates a pulse signal Sr having a predetermined duty ratio, based on a comparison between the fed back pulse signal Sd and a voltage value corresponding to a first current value or a second current value, and supplies the pulse signal Sr to a pulse supplying unit. The pulse supplying unit supplies the pulse signal Sr as a first pulse signal S1 and/or a second pulse signal S2 to a gate terminal G of a MOSFET.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.