Invention Grant
- Patent Title: Solenoid valve driving circuit, solenoid valve, and solenoid valve driving method
- Patent Title (中): 电磁阀驱动电路，电磁阀和电磁阀驱动方式
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Application No.: US12872365Application Date: 2010-08-31
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Publication No.: US08254077B2Publication Date: 2012-08-28
- Inventor: Yoshihiro Fukano , Shigeharu Oide , Takayoshi Hatou , Hidenori Ogawa
- Applicant: Yoshihiro Fukano , Shigeharu Oide , Takayoshi Hatou , Hidenori Ogawa
- Applicant Address: JP Tokyo
- Assignee: SMC Kabushiki Kaisha
- Current Assignee: SMC Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2010-046550 20100303
- Main IPC: H01H47/00
- IPC: H01H47/00 ; H01H47/32
Abstract:
A solenoid valve driving circuit for a solenoid valve includes a current detector for detecting a current that flows in a solenoid coil, a rate of change over time calculating unit for calculating a rate of change over time of the detected current, and a maintaining state transition determining unit for determining a timing at which transition from a first period to a second period occurs based on the calculated rate of change over time.
Public/Granted literature
- US20110214741A1 SOLENOID VALVE DRIVING CIRCUIT, SOLENOID VALVE, AND SOLENOID VALVE DRIVING METHOD Public/Granted day:2011-09-08
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