Device and Method for Controlling DC Bus Ripple
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United States of America Patent
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Apr 23, 2020
app pub date -
Sep 23, 2019
filing date -
Oct 21, 2018
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Abstract
An apparatus for controlling ripple voltage on a bus includes a switched power converter and a control circuit. The switched power converter includes a pair of terminals for connection between the bus and a ground, a buffer capacitor, an inductor, and switching circuitry coupled to the buffer capacitor and the inductor. The switching circuitry is configured to control a voltage between the terminals while a charge on the buffer capacitor varies over a predefined range in response to a current flowing through the terminals. The control circuit is configured to adjust the voltage between the terminals by controlling the switching circuitry while maintaining bipolar current flow through the inductor in all working conditions of DC voltage and power flow.
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