Magnetic core desaturation methods for magnetic energy harvesting
AssigneeThe Florida State University Research Foundation, Inc.
InventorsJinyeong Moon, Min Gao
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Abstract
Methods and systems for mid-cycle desaturation during magnetic energy harvesting (MEH) are provided. Four different mid-cycle desaturation strategies can be employed, each of which generates multiple power transfer windows within an alternating current (AC) half-cycle. All four strategies enable much higher energy extraction compared to MEH without utilizing any of the four strategies.
Claims18
A method for mid-cycle desaturation of a magnetic energy harvesting (MEH) system, the method comprising:
- desaturating a magnetic core of the MEH system such that the MEH system has a plurality of power transfer windows within one alternating current (AC) half-cycle of the MEH system,
- wherein desaturating the magnetic core of the MEH system comprises:
- a) utilizing inductor-capacitor (LC) resonance within the MEH system to generate an opposite load voltage and desaturate the magnetic core;
- b) utilizing a transient voltage suppressor (TVS) diode within the MEH system to generate an opposite load voltage and desaturate the magnetic core;
- or
- c) providing a plurality of unidirectional switches and an additional magnetic stage to the MEH system to achieve current commutation and reverse a voltage of the magnetic core.
A magnetic energy harvesting (MEH) system configured for mid-cycle desaturation of the MEH system, the system comprising:
- a magnetic core,
- wherein the system is configured such that the magnetic core is desaturated such that the MEH system has a plurality of power transfer windows within one alternating current (AC) half-cycle of the MEH system, and
- wherein the MEH system further comprises:
- a) an inductor-capacitor pair, wherein the MEH system is configured such that inductor-capacitor (LC) resonance within the MEH system is utilized to generate an opposite load voltage and desaturate the magnetic core;
- b) a transient voltage suppressor (TVS) diode configured to generate an opposite load voltage and desaturate the magnetic core;
- or
- c) a plurality of unidirectional switches and an additional magnetic stage configured to achieve current commutation and reverse a voltage of the magnetic core.
Dependencies are inferred from the claim text.