发明名称 |
CONTROL CIRCUITS FOR SOLENOIDS |
摘要 |
A solenoid control circuit includes a first switching element which connects one side of the solenoid load to earth via a current sensing resistor. The other side of the solenoid load is connected by a second switching element to a supply rail. This second switching element is biased to conduct but can be turned off by either of two comparators which are connected to compare the voltage across the current sensing resistor with two different reference voltages. Each comparator has hysteresis and the circuit operates so that one comparator operates to switch off the second switching element when a predetermined current level is reached and the other comparator operates to switch the second switching elements on and off at lower current levels between said predetermined current level and the lower threshold level of the first comparator. |
申请公布号 |
DE2964900(D1) |
申请公布日期 |
1983.03.31 |
申请号 |
DE19792964900 |
申请日期 |
1979.08.03 |
申请人 |
LUCAS INDUSTRIES PUBLIC LIMITED COMPANY |
发明人 |
WOODHOUSE, RICHARD GRAHAM;SALWAY, PETER HUGH |
分类号 |
H01F7/18;F02D41/20;F02D41/30;H01H47/32;(IPC1-7):H03K17/64;F02D5/02 |
主分类号 |
H01F7/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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