期刊
IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY
卷 63, 期 5, 页码 1735-1747出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TEMC.2021.3104787
关键词
Safety; Implants; Transmitters; Receivers; Optimization; Magnetic resonance; Solenoids; Biomedical implants; magnetoelectric (ME) transducer; optimization; safety constraints; wireless power transfer (WPT)
资金
- National Science Foundation [ECCS-1651438]
This article investigates the optimal design of a transmit coil for a wireless power transfer system for biomedical implants with the goal of maximizing the magnetic flux density at the location of the implant. The study presents equations for determining the design parameters of an optimal solenoid transmitter subject to constraints on either transmitter size or electric current. Experimental validation of the mathematical model and a case study illustrating optimal design rules are also provided.
This article presents an investigation on the optimal design of a transmit coil for a wireless power transfer system (WPTS) for biomedical implants with the goal of maximizing the magnetic flux density (B-field) at the location of the implant while not violating magnetic field exposure limits. Maximizing the B-field correlates to higher transferable electric power for certain WPTSs, such as those that use magnetoelectric receivers. While previous works have optimized the thermal efficiency, or system efficiency, to our knowledge no one yet has developed the procedure to optimize the transmitter to maximize the B-field subject to an imposed safety limit constraint for magnetic field exposure. In addition to this safety constraint, the optimal design of the transmitter is considered when the system geometry or the input current is constrained. Equations for determining the design parameters of an optimal solenoid transmitter are derived subject to constraints on either transmitter size or electric current. If a certain magnetic field strength is required, solutions to the size and current of the transmitter are presented, which allow the desired fields without violating the safety constraint. The mathematical model is experimentally validated, and a case study is described that illustrates the optimal design rules.
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