Invention Grant
- Patent Title: Control apparatus for electromagnetic inductive load
- Patent Title (中): 用于电磁感应负载的控制装置
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Application No.: US13595375Application Date: 2012-08-27
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Publication No.: US08625249B2Publication Date: 2014-01-07
- Inventor: Eiichirou Ooishi , Mitsuaki Morimoto
- Applicant: Eiichirou Ooishi , Mitsuaki Morimoto
- Applicant Address: JP Tokyo
- Assignee: Yazaki Corporation
- Current Assignee: Yazaki Corporation
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2010-051297 20100309
- Main IPC: H01H47/00
- IPC: H01H47/00

Abstract:
A control apparatus for an electromagnetic inductive load is a circuit in which a switching element that is PWM-controlled and the electromagnetic inductive load are connected together in series between a DC power supply and a ground. The control apparatus includes a current sensing unit which senses a regenerative current in an OFF time in a PWM driving operation, a current detecting unit which outputs a current detection signal when a sense current becomes smaller than a target current amount, a PWM signal generating unit which receives a clock signal and the current detection signal, and generates a PWM signal that is at a high or low level during a period from the current detection signal being smaller than the target current amount, to rising or falling of the clock signal, and a driving unit which controls to drive the switching element.
Public/Granted literature
- US20120319499A1 CONTROL APPARATUS FOR ELECTROMAGNETIC INDUCTIVE LOAD Public/Granted day:2012-12-20
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