Invention Grant
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
- Patent Title: Fault protection of a variable differential transformer (VDT) excitation circuit
- Patent Title (中): 可变差动变压器（VDT）励磁电路的故障保护
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Application No.: US14227004Application Date: 2014-03-27
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Publication No.: US09214802B2Publication Date: 2015-12-15
- Inventor: Nicholas C. Harvey , Christopher J. Jonke , Steven A. Avritch
- Applicant: Hamilton Sundstrand Corporation
- Applicant Address: US NC Charlotte
- Assignee: Hamilton Sundstrand Corporation
- Current Assignee: Hamilton Sundstrand Corporation
- Current Assignee Address: US NC Charlotte
- Agency: Kinney & Lange, P.A.
- Main IPC: H02H3/20
- IPC: H02H3/20 ; H02H9/04 ; H02H3/08 ; H02H9/02 ; H02H7/04
Abstract:
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.
Public/Granted literature
- US20150280422A1 FAULT PROTECTION OF A VOLTAGE DIFFERENTIAL TRANSFORMER (VDT) EXCITATION CIRCUIT Public/Granted day:2015-10-01
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