AC-DC converter and AC-DC conversion method
AssigneeConvenientPower HK Ltd.
InventorsWing Choi Ho, Wai Pong Choi, Shu Yuen Ron Hui
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Abstract
The present invention provides an AC-DC converter and AC-DC conversion method for converting an AC input provided by a power transfer winding. The AC-DC converter includes a rectifying means for rectifying the AC input into a rectified output, and a control means for controlling the rectifying means based on a comparison between a reference signal and a voltage feedback signal, the voltage feedback signal being based on the rectified output.
Claims72
An AC-DC converter for converting an AC input provided by a power transfer winding, the AC-DC converter including:
- a rectifying circuit configured to rectify the AC input into a rectified output, the rectifying circuit including a first main switch and a second main switch;
- and
- a control circuit configured to control the rectifying circuit based on a comparison between a reference signal and a voltage feedback signal, the voltage feedback signal being based on the rectified output, the control circuit including a first driver for driving the first main switch and a second driver for driving the second main switch, the first and second drivers disabling the rectified output when the voltage feedback signal is above the reference signal by a first value, and allowing the rectifying circuit to operate as a self-driven rectifier to enable the rectified output when the voltage feedback signal is below the reference signal by a second value.
A method of converting an AC input provided by a power transfer winding, the method including:
- rectifying the AC input into a rectified output using two main switches;
- and
- controlling the rectification on the basis of a comparison between a reference signal and a voltage feedback signal, the voltage feedback signal being based on the rectified output, wherein controlling the rectification includes driving one main switch with a first driver and driving the other main switch with a second driver, the first and second drivers disabling the rectified output when the voltage feedback signal is above the reference signal by a first value, and allowing the main switches to operate as part of a self-driven rectifier to enable the rectified output when the voltage feedback signal is below the reference signal by a second value.
Dependencies are inferred from the claim text.