High power current switch

A high power switching circuit suitable for injection of high currents, typically several tens of Amperes, at high drive voltages of up to 5-10 kV, is provided using a combination of electromechanical and semiconductor switching elements that, while providing switchable polarity, substantially bypas...

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Bibliographic Details
Main Author Berglund Bo
Format Patent
LanguageEnglish
Published 20.03.2018
Subjects
BASIC ELECTRIC ELEMENTS
BASIC ELECTRONIC CIRCUITRY
DETECTING MASSES OR OBJECTS
ELECTRIC SWITCHES
ELECTRICITY
EMERGENCY PROTECTIVE DEVICES
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
MEASURING
PHYSICS
PULSE TECHNIQUE
RELAYS
SELECTORS
TESTING
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Summary:A high power switching circuit suitable for injection of high currents, typically several tens of Amperes, at high drive voltages of up to 5-10 kV, is provided using a combination of electromechanical and semiconductor switching elements that, while providing switchable polarity, substantially bypasses semiconductor switching element(s) during a substantial portion of current injection duty cycles. In this way, thermal heating of switching elements can be reduced/managed in a way that improves long term reliability of geophysical survey equipment. In addition, circuit protections can be provided to address backflow currents generated upon collapse of electromagnetic fields in inductive loads, such as is typical in geophysical surveys.
Bibliography:Application Number: US201514855241