Capacitor power supply unit for small electrical loads with a high current requirement
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United States of America Patent
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Dec 20, 2016
Grant Date -
Nov 12, 2015
app pub date -
May 8, 2015
filing date -
May 9, 2014
priority date (Note) -
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Abstract
A capacitor power supply unit converts a mains voltage (U) into a lower operating voltage (V1) for a controller and a supply voltage (V2) for an electrical small load. A series circuit including a mains capacitor and a zener diode is connected to the mains voltage (U) whereat the supply voltage (V2) for an electrical small load having a permissible operating voltage is tapped off. The capacitor power supply unit provides for the supply voltage (V2) to be greater than the permissible operating voltage of the electrical small load and for the small load to be connected to the supply voltage (V2) via a buck converter. Here, the buck converter is controlled as a current source having a variable operating frequency.
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