发明授权
US09214802B2 Fault protection of a variable differential transformer (VDT) excitation circuit
有权
可变差动变压器（VDT）励磁电路的故障保护
- 专利标题： Fault protection of a variable differential transformer (VDT) excitation circuit
- 专利标题（中）： 可变差动变压器（VDT）励磁电路的故障保护
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申请号： US14227004申请日： 2014-03-27
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公开(公告)号： US09214802B2公开(公告)日： 2015-12-15
- 发明人: Nicholas C. Harvey , Christopher J. Jonke , Steven A. Avritch
- 申请人： Hamilton Sundstrand Corporation
- 申请人地址： US NC Charlotte
- 专利权人： Hamilton Sundstrand Corporation
- 当前专利权人： Hamilton Sundstrand Corporation
- 当前专利权人地址： US NC Charlotte
- 代理机构： Kinney & Lange, P.A.
- 主分类号： H02H3/20
- IPC分类号： H02H3/20 ; H02H9/04 ; H02H3/08 ; H02H9/02 ; H02H7/04
摘要：
An excitation circuit includes an operational amplifier, a transistor circuit, a switch, and a pull-down resistor. The operational amplifier receives an excitation input voltage at a non-inverting input and provides an operational amplifier output. The transistor circuit receives the operational amplifier output and provides a transistor circuit output. The transistor circuit output is connected to an inverting input of the operational amplifier. The switch is connected between the operational amplifier output and the transistor circuit. The switch is opened to disconnect the operational amplifier output from the transistor circuit. The pull-down resistor is connected between an output of the switch and ground, wherein the pull-down resistor turns off the transistor circuit when the switch is opened.
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