Solenoid valve driving circuit and solenoid valve
US7903383B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 2008 |
| Grant date | Mar 8, 2011 |
| Priority date | — |
| Expiry date | Sep 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.