发明名称 |
HARDWARE-BASED, REDUNDANT OVERVOLTAGE PROTECTION |
摘要 |
A generator system includes a generator and a generator control unit (GCU). The GCU is connected to monitor and regulate the generator output voltage. The GCU includes a protection signal processor that receives monitored generator voltages and executes software to detect an overvoltage condition. The GCU further includes redundant, hardware based overvoltage detection that detects a peak voltage value associated with the monitored generator voltage and includes a fast overvoltage detection circuit that generates a first overvoltage fault signal if the peak voltage value is greater than a first threshold value and includes an inverse overvoltage detection circuit that generates a second overvoltage fault signal if the peak voltage value is greater than a second threshold value for a duration of time that varies with a magnitude of the peak voltage value. |
申请公布号 |
US2014168825(A1) |
申请公布日期 |
2014.06.19 |
申请号 |
US201213718178 |
申请日期 |
2012.12.18 |
申请人 |
HAMILTON SUNDSTRAND CORPORATION |
发明人 |
Patel Daxesh K. |
分类号 |
H02H7/06 |
主分类号 |
H02H7/06 |
代理机构 |
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代理人 |
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主权项 |
1. A generator control unit (GCU) that provides independent, redundant overvoltage protection for an associated generator, the GCU comprising:
a protection signal processor that monitors an output voltage of the generator and executes software to detect overvoltage conditions based on the monitored output of the generator and generates a first overvoltage fault signal in response to a detected overvoltage condition; a hardware-based overvoltage protection circuit that includes:
a peak detector circuit that detects a peak voltage associated with the monitored output voltage;a fast overvoltage detection circuit that compares the peak voltage to a first threshold value and generates a first fault signal in response to the peak voltage exceeding the first threshold value;an inverse overvoltage detection circuit that compares the peak voltage to a second threshold value and generates a second fault signal in response to the peak voltage exceeding the second threshold value for a duration of time;a diode OR circuit that logically combines the first fault signal with the second fault signal to generate a second overvoltage fault signal; wherein the first overvoltage fault signal is combined with the second overvoltage fault signal to generate a combined overvoltage fault signal that signals an overvoltage fault condition in the associated generator.
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地址 |
Windsor Locks CT US |