System and method for converting an AC input voltage to a regulated DC output voltage using a Z-type converter with rectified switches
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United States of America Patent
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Jan 21, 2014
Grant Date -
Apr 5, 2012
app pub date -
May 13, 2011
filing date -
Sep 30, 2010
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Abstract
An AC to DC converter for converting an AC input voltage to a regulated DC output voltage using a Z-type converter and rectified switches. The Z-type converter includes first and second inductors, a capacitor, two rectified switches and a load device coupled in a cross-coupled configuration. The Z-type converter may be configured according to a Z-source or a quasi-Z-source rectifier network. The AC input voltage is applied to an input and the DC output voltage is developed across the load device. Each rectified switch may be configured as a series-coupled diode and electronic switch or as a dual gate GaN device with a shorted gate. A control network monitors the DC output voltage and develops a control signal for controlling the first and second rectified switches to regulate the DC output voltage. The control network may control the rectified switches based on duty cycle control or current mode control.
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