Abstract
Capacitive power transfer (CPT) technology is becoming increasingly popular in various application areas. Due to its limitations, such as low frequency, low coupling capacitance, and the high voltage stress on metal plates, the studies on high power CPT applications fell behind previously. Therefore, the wideband gap (WBG) semiconductor devices and the compensation topologies are further adopted to tackle these limitations. The main purpose of the paper is to review CPT applications in terms of performance parameters, advantages, disadvantages, and also challenges. Initially, the basic principles of CPT technology are examined, which cover compensation topologies, coupler structures, transfer distance, power electronic components, and system control methods. Then, CPT applications are evaluated for performance parameters (i.e., power level, operation frequency, system efficiency, transfer distance) along with compensation types, inverter types, and coupler types. The applications are categorized into six main groups according to industrial topics as safety, consumer electronics, transport, electric machines, biomedical, and miscellaneous. Herein, power level changes from <inline-formula> <tex-math notation="LaTeX">$\mu \text{W}$ </tex-math></inline-formula> to kW ranges, the operation frequency varies from 100s of kHz to 10s of MHz ranges as well. The maximum system efficiency is recorded as 97.1 %. The transfer distance varies from <inline-formula> <tex-math notation="LaTeX">$\mu \text{m}$ </tex-math></inline-formula> range to 100s of mm ranges. The full-bridge inverter topology and four-plate coupler structure are noticeable in CPT applications. Finally, advantages, disadvantages, and challenges of CPT applications are evaluated in detail. This review is expected to serve as a reference for researchers who study on CPT systems and their applications.
Highlights
Wireless power transfer (WPT) technology was put forward to transmit electrical energy using coils by Nicola Tesla in 1899 [1]
The results show that conventional compensation topologies are typically used in capacitive power transfer (CPT) applications
The CPT technology has been a significant candidate among WPT technologies in recent years
Summary
Wireless power transfer (WPT) technology was put forward to transmit electrical energy using coils by Nicola Tesla in 1899 [1]. The basic inductive power transfer scheme is formed with a high frequency inverter on the primary side, a high frequency rectifier with a load on the secondary side, and an inductive coupling interface as well. The latter technique utilizes an alternating electric field to transfer power wirelessly and is hereafter called capacitive power transfer (CPT). A basic scheme of the CPT system includes a high frequency inverter on the primary side, a high frequency rectifier with a load on the secondary side, and a capacitive coupling interface. Applications are reviewed with performance parameters (i.e., power level, operation frequency, system efficiency, and transfer distance) along with compensation types, inverter types, and coupler types. Compensation networks affect system efficiency and they should be designed properly for high power large air-gap applications
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call