Multi-modular capacitive wireless power transfer circuit and related techniques
Abstract
A high performance kilowatt-scale large air-gap multi-modular capacitive wireless power transfer (WPT) system is provided for electric vehicle (EV) charging. In one particular implementation, the multi-modular system achieves high power transfer while maintaining fringing electric fields within prescribed safety limits. The fringing fields are reduced using near-field phased-array field-focusing techniques, wherein the adjacent modules of the multi-modular system are out-phased with respect to one another. The inter-module interactions in this multi-modular system can be modeled, and an approach to eliminate these interactions in a practical EV charging environment is provided. To illustrate one example implementation, a prototype 1.2-kW 6.78-MHz 12-cm air-gap multi-modular capacitive WPT system comprising two 600-W modules is provided. This prototype system achieves 21.2 kW/m2 power transfer density and a peak efficiency of 89.8%. This multi-modular system also achieves a fringing field reduction of 50% compared to its individual modules.
- Inventors:
- Issue Date:
- Research Org.:
- Univ. of Colorado, Boulder, CO (United States)
- Sponsoring Org.:
- USDOE Advanced Research Projects Agency - Energy (ARPA-E)
- OSTI Identifier:
- 1986828
- Patent Number(s):
- 11502542
- Application Number:
- 16/636,211
- Assignee:
- The Regents of the University of Colorado (Denver, CO)
- DOE Contract Number:
- AR0000618
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 08/01/2018
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Afridi, Khurram K., Regensburger, Brandon, Sinha, Sreyam, Kumar, Ashish, and Popovic, Zoya. Multi-modular capacitive wireless power transfer circuit and related techniques. United States: N. p., 2022.
Web.
Afridi, Khurram K., Regensburger, Brandon, Sinha, Sreyam, Kumar, Ashish, & Popovic, Zoya. Multi-modular capacitive wireless power transfer circuit and related techniques. United States.
Afridi, Khurram K., Regensburger, Brandon, Sinha, Sreyam, Kumar, Ashish, and Popovic, Zoya. Tue .
"Multi-modular capacitive wireless power transfer circuit and related techniques". United States. https://www.osti.gov/servlets/purl/1986828.
@article{osti_1986828,
title = {Multi-modular capacitive wireless power transfer circuit and related techniques},
author = {Afridi, Khurram K. and Regensburger, Brandon and Sinha, Sreyam and Kumar, Ashish and Popovic, Zoya},
abstractNote = {A high performance kilowatt-scale large air-gap multi-modular capacitive wireless power transfer (WPT) system is provided for electric vehicle (EV) charging. In one particular implementation, the multi-modular system achieves high power transfer while maintaining fringing electric fields within prescribed safety limits. The fringing fields are reduced using near-field phased-array field-focusing techniques, wherein the adjacent modules of the multi-modular system are out-phased with respect to one another. The inter-module interactions in this multi-modular system can be modeled, and an approach to eliminate these interactions in a practical EV charging environment is provided. To illustrate one example implementation, a prototype 1.2-kW 6.78-MHz 12-cm air-gap multi-modular capacitive WPT system comprising two 600-W modules is provided. This prototype system achieves 21.2 kW/m2 power transfer density and a peak efficiency of 89.8%. This multi-modular system also achieves a fringing field reduction of 50% compared to its individual modules.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2022},
month = {11}
}
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