Patent
Transient voltage protection circuit for electrical power converters
TLDR
In this article, a transient over-voltage protection circuit is proposed to protect the DC to DC converter from input voltages that exceed the converter's operational limits by partially opening a switch connected between a rectifier circuit and a DC-to-DC converter.Abstract:
A transient over-voltage protection circuit includes a normally closed switch connected between a rectifier circuit and a DC to DC converter. This switch is caused to partially open when the voltage input to the DC to DC converter exceeds a predetermined value, thereby protecting the DC to DC converter from input voltages that exceed the converter's operational limits. The switch is returned to its normally closed state when the level of voltage input to the converter drops below a predetermined lower value. A capacitor connected across the input terminals of the converter is charged up when the switch is closed and functions to supply power to the DC to DC converter when the switch is in its partially opened or current limit state.read more
Citations
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References
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Patent
Standby boost converter
TL;DR: In this paper, a boost voltage converter is combined with any DC-DC converter to provide a power system with significant overall power efficiency improvement in applications requiring continuous operation through low line transient levels.
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Surge current protection circuit
Tadao Suzuki,Shigeaki Wachi +1 more
TL;DR: In this article, the collector and emitter electrodes of a control transistor are connected between the gate and cathode electrodes of the rectifier to prevent the semiconductor controlled rectifier from conducting surge currents.
Patent
Circuit arrangement for limiting the inrush current and overvoltage protection for switching mode current supply devices
TL;DR: In this article, a circuit arrangement for limiting the switching-on current and for overvoltage protection in the case of pulsed power supply apparatuses having a field effect transistor was proposed.
Patent
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TL;DR: In this article, a primary switching regulator with four switches (S1-S4) and a capacitor (K) coupled to the primary of a transformer is described, where an attenuator resistor (R1) is used to limit the current during switch-on.
Patent
Electronic device for preventing undesirable effect resulting from voltage fluctuation
Hiroyuki Mikada,Jyuji Kishimoto +1 more
TL;DR: In this paper, an electronic device which comprises means for detecting the occurrence of voltage fluctuation in the input or output voltage of a power source to produce an output signal, and means operative in response to the output signal for disabling a portion of the electronic device, such as a liquid crystal display element, thereby substantially elongating the lifetime of the particular portion of electronic device.