Digital Control of Switching Boundary Mode Interleaved Power Converters with Reduced Crossover Distortion

Abstract

The present invention discloses a circuit arrangement, signal processor and method for interleaved switching boundary mode power conversion. The circuit arrangement includes at least: an input for receiving an AC input voltage from a power source; an output for providing an output voltage to a load; a first interleaving circuit comprising: a first energy and a first controllable switching device; and one or more secondary interleave circuits, each secondary interleave circuit comprising: a secondary energy storage device; and a secondary controllable switching device; and a signal processor. The signal processor is connected to the controllable switching device and includes: at least a first switching cycle controller configured for cyclic / repeated zero-current switching operation of the first controllable switching device; and one or A plurality of secondary switching cycle controllers configured for cyclic zero current switching operation of the one or more secondary controllable switching devices. The signal processor is configured to disable one or more of the interleaving circuits to reduce zero-crossing time when the AC input voltage is below a first threshold voltage.

Description

[0001] Related Patent Applications [0002] This application claims priority to U.S. Provisional Patent Application No. 62 / 543,189, filed August 9, 2017, the contents of which are hereby incorporated by reference for all purposes. technical field [0003] The present disclosure relates to power converters, and more particularly, to controlling an interleaved boundary mode power converter with reduced crossover distortion. Background technique [0004] Power converters, and in particular switched mode power converters, are used in a variety of applications to provide AC / DC and DC / DC conversion. For example, switched-mode power converters (also known as switched-mode power supplies (SMPS)) are widely used in computer and mobile phone power units to provide the necessary operating voltage from a typical 120V / 240V AC feed line. [0005] Typical concerns when designing a power converter involve conversion efficiency and cost. It should be readily apparent that power loss should...

AI Technical Summary

Problems solved by technology

In addition, typical filters for electromagnetic interference (EMI) attenuate such high-frequency components due to the high switching frequency near the zero-crossing point of the input voltage, resulting in prolonged zero-current conditions near the zero-crossing point and Distorted current waveform

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