Patent
Security apparatus for power converter
TLDR
In this paper, a security apparatus adapted to a power converter, including a power converting circuit connected between a DC power source and an AC system, is described, which is characterized by a disturbance generator circuit for applying a disturbance to the phase detector circuit; and a detector circuit for detecting an abnormal state in which the phase or frequency of the output voltage of the power converter circuit deviates from a normal one.Abstract:
A security apparatus adapted to a power converter, including a power converting circuit connected between a DC power source and an AC system; a phase detector circuit for detecting the voltage phase of the AC system to provide a phase detection signal; a reference signal generator circuit for generating a voltage reference in accordance with the phase detection signal; a control circuit for controlling an output voltage of the power converting circuit in accordance with the voltage reference. The security apparatus is characterized by a disturbance generator circuit for applying a disturbance to the phase detector circuit; and a detector circuit for detecting an abnormal state in which the phase or frequency of the output voltage of the power converting circuit deviates from a normal one.read more
Citations
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References
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Patent
Overcurrent protection apparatus
TL;DR: In this paper, an overcurrent protection apparatus in a switching power supply, including a power switching element for interrupting the primary current of a transformer, and a control circuit for generating control pulses which are modulated in pulse width in accordance with a variation in the rectified output voltage on the secondary side of the transformer, is described.
Patent
Continuously operating standby A-C power system
TL;DR: In this paper, a continuously operating standby A-C power system which uses a single loop responsive to the system's input and output A-c voltages, the voltage of the battery included in the standby portion of the supply and the amplitude and frequency of the input A -C voltage for controlling the phase relationship between the inputs and output voltages is described.
Patent
DC-AC converter for supplementing an AC power source
Donald J. Keefe,Oscar D. Despe +1 more
TL;DR: In this article, a DC-AC converter for supplying power from a DC power source to a load that is also supplied power by an AC power source is presented. But the application of the DC source to the load is limited to less than the duration of each half cycle of the AC source.
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Frequency responsive system power sequencer
Luther L. Genuit,John R. Nowell +1 more
TL;DR: In this paper, the authors proposed a power sequence device which comprises an element which generates a sequencing code which is capable of being decoded by actuators included in the various equipment cabinets.