Autonomously Adaptable Wireless Power Charging System

Award Information
Agency: Department of Defense
Branch: Army
Contract: W91CRB-13-C-0001
Agency Tracking Number: A122-102-0528
Amount: $99,996.00
Phase: Phase I
Program: SBIR
Awards Year: 2012
Solicitation Year: 2012
Solicitation Topic Code: A12-102
Solicitation Number: 2012.2
Small Business Information
MA, Natick, MA, 01760-1023
DUNS: 184629491
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Eric Ehrbar
 Senior Engineer
 (508) 655-5565
Business Contact
 Judy Budny
Title: Contracts Administrator
Phone: (508) 655-5565
Research Institution
A need exists within the Nett Warrior program to wirelessly charge soldier mounted electronic devices. Currently soldiers either carry extra batteries or dismount their electronics and deal with the logistics of a variety of cords to charge their electronic devices. Current wireless inductive chargers suffer from range limitations, and require complex control electronics to properly couple the transmitter and receiver devices. Busek has developed an autonomously adaptable wireless power charging circuit. Its design allows the fundamental oscillating frequency to be almost completely determined by the load. This means what was previously accomplished in active control software is realized by the nature of the circuit itself. The advantage of load determined resonance is the inherent ability for the circuit to deliver maximum power without actively tuning the operating frequency for maximum coupling. In Phase I the self-tuning wireless charging circuit will be developed. This circuit will be analyzed and adapted for use as a transmitter. Its performance will be evaluated and analyzed when coupled to single and multiple loads. The safety and performance of the circuitry via 3-D electromagnetic simulations will be evaluated. The goal is to ensure electric and magnetic field strengths remain within safe exposure limits while providing suitable efficiency.

* Information listed above is at the time of submission. *

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