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Modeling and Optimization of Class-E Amplifier at Subnominal Condition in a Wireless Power Transfer System for Biomedical Implants
Liu H(刘浩); Shao Q(邵琪); Fang XL(方学林)
Department机器人学研究室
Source PublicationIEEE Transactions on Biomedical Circuits and Systems
ISSN1932-4545
2017
Volume11Issue:1Pages:35-43
Indexed BySCI ; EI
EI Accession number20162502526670
WOS IDWOS:000395442500003
Contribution Rank1
Funding OrganizationNational Natural Science Foundation of China (61473281), National Sciences and Technology Support Project (2015BAI01B13) and State Key Laboratory of Robotics Self-plan Project (2016-Z06).
KeywordBiomedical Implants Class-e Amplifier Efficiency Improvement Subnominal Condition Wireless Power Transfer System Zero-voltage-switching (Zvs)
AbstractFor the class-E amplifier in a wireless power transfer (WPT) system, the design parameters are always determined by the nominal model. However, this model neglects the conduction loss and voltage stress of MOSFET and cannot guarantee the highest efficiency in the WPT system for biomedical implants. To solve this problem, this paper proposes a novel circuit model of the subnominal class-E amplifier. On a WPT platform for capsule endoscope, the proposed model was validated to be effective and the relationship between the amplifier’s design parameters and its characteristics was analyzed. At a given duty ratio, the design parameters with the highest efficiency and safe voltage stress are derived and the condition is called ‘optimal subnominal condition.’ The amplifier’s efficiency can reach the highest of 99.3% at the 0.097 duty ratio. Furthermore, at the 0.5 duty ratio, the measured efficiency of the optimal subnominal condition can reach 90.8%, which is 15.2% higher than that of the nominal condition. Then, a WPT experiment with a receiving unit was carried out to validate the feasibility of the optimized amplifier. In general, the design parameters of class-E amplifier in a WPT system for biomedical implants can be determined with the proposed optimization method in this paper.
Language英语
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Document Type期刊论文
Identifierhttp://ir.sia.cn/handle/173321/19721
Collection机器人学研究室
Corresponding AuthorLiu H(刘浩)
Affiliation1.State Key Laboratory of Robotics, Shenyang Institute of Automation (SIA), Chinese Academy of Sciences (CAS), Shenyang, 100190, China
2.University of Chinese Academy of Sciences, Beijing 100049, China
Recommended Citation
GB/T 7714
Liu H,Shao Q,Fang XL. Modeling and Optimization of Class-E Amplifier at Subnominal Condition in a Wireless Power Transfer System for Biomedical Implants[J]. IEEE Transactions on Biomedical Circuits and Systems,2017,11(1):35-43.
APA Liu H,Shao Q,&Fang XL.(2017).Modeling and Optimization of Class-E Amplifier at Subnominal Condition in a Wireless Power Transfer System for Biomedical Implants.IEEE Transactions on Biomedical Circuits and Systems,11(1),35-43.
MLA Liu H,et al."Modeling and Optimization of Class-E Amplifier at Subnominal Condition in a Wireless Power Transfer System for Biomedical Implants".IEEE Transactions on Biomedical Circuits and Systems 11.1(2017):35-43.
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