发明授权
- 专利标题: Drive circuit device for inductive load
- 专利标题(中): 用于感性负载的驱动电路装置
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申请号: US249652申请日: 1988-09-27
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公开(公告)号: US4845420A公开(公告)日: 1989-07-04
- 发明人: Hidekazu Oshizawa , Ryoichi Harada , Masami Okano
- 申请人: Hidekazu Oshizawa , Ryoichi Harada , Masami Okano
- 申请人地址: JPX Tokyo
- 专利权人: Diesel Kiki Co., Ltd.
- 当前专利权人: Diesel Kiki Co., Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX62-248076 19871002; JPX62-248077 19871002
- 主分类号: H01H47/32
- IPC分类号: H01H47/32 ; H03K17/0422
摘要:
In a drive circuit device for an inductive load, the inductive load and a detecting resistor are incorporated in a current supply circuit in series relation to a drive transistor. An operational amplifier is operative in response to detecting voltage fed-back from the detecting resistor, for controlling the drive transistor, in turn, for controlling supply current flowing through the inductive load to a predetermined value. Turning-on and -off of the drive transistor are controlled by a switching element operative in response to a control signal, thereby carrying out current supply to an inductive load and stoppage of the current supply. A feed-back circuit is provided, in which a response element supplies feed-back current to be controlled by the operational amplifier, to the feed-back resistor, in response to the turning-off of the drive transistor. The operational amplifier carries out feed-back control without being saturated, even at the stoppage of the current supply to the inductive load.
公开/授权文献
- US4375487A Installation for powder-coating work pieces 公开/授权日:1983-03-01
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