SELF-DRIVEN AC-DC SYNCHRONOUS RECTIFIER FOR POWER APPLICATIONS
First Claim
1. A system that facilitates synchronous rectification of a power signal, comprising:
- a subset of power switches configured to receive an input power signal and rectify the input power signal to generate a rectified power signal as an output; and
a self-driven gate-drive (SDGD) subsystem configured to facilitate control of respective switching of respective power switches in the subset of power switches, wherein the SDGD subsystem is powered by the rectified power signal or the input power signal.
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Abstract
Systems, methods, and devices that employ self-driven gate-drive circuitry to facilitate controlling power switches to emulate a diode bridge to synchronously rectify a power signal are presented. A single-phase or multi-phase synchronous rectifier can comprise at least a first pair of switches of a first conducting path and a second pair of switches of a second conducting path that can form or emulate a diode bridge. To facilitate emulating turn-on and turn-off conditions of a diode, a switch can be turned on when voltage across the switch is forward-biased and turned off when switch current is reversed; also, there can be at least one current-controlled switch in each conducting path. Self-driven gate-drive circuitry employs low power components that can facilitate controlling respective switching of the at least first pair and second pair of switches, wherein switching of the switches is also controlled at start-up to emulate a diode bridge.
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Citations
20 Claims
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1. A system that facilitates synchronous rectification of a power signal, comprising:
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a subset of power switches configured to receive an input power signal and rectify the input power signal to generate a rectified power signal as an output; and a self-driven gate-drive (SDGD) subsystem configured to facilitate control of respective switching of respective power switches in the subset of power switches, wherein the SDGD subsystem is powered by the rectified power signal or the input power signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for rectifying an input power signal, further comprising:
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generating a rectified power signal from the input power signal received by a subset of power switches, wherein power switches in the subset are arranged in relation to each other to emulate functionality of a diode rectifier; and supplying at least a portion of the rectified power signal to a self-driven gate-drive (SDGD) subsystem associated with the subset of power switches to facilitate controlling respective switching of respective power switches of the subset of power switches. - View Dependent Claims (14, 15, 16, 17)
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18. A self-driven synchronous rectifier device, comprising:
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a subset of switches that is configured to receive an input voltage signal and rectify the input voltage signal to generate a rectified voltage signal as an output; and a self-driven gate-drive (SDGD) subsystem that is configured to control respective switching of respective switches in the subset of switches, wherein the SDGD subsystem is further configured to receive at least a portion of the rectified voltage signal. - View Dependent Claims (19, 20)
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Specification