Three-Coil Wireless Charging System Based on S-PS Topology

Kai Yan, Ruirong Dang () and Wenzhen Wang ()
Additional contact information
Kai Yan: Shaanxi Provincial Key Laboratory of Oil and Gas Well Measurement and Control Technology, Xi’an Shiyou University, Xi’an 710065, China
Ruirong Dang: Shaanxi Provincial Key Laboratory of Oil and Gas Well Measurement and Control Technology, Xi’an Shiyou University, Xi’an 710065, China
Wenzhen Wang: Shaanxi Provincial Key Laboratory of Oil and Gas Well Measurement and Control Technology, Xi’an Shiyou University, Xi’an 710065, China

Energies, 2024, vol. 17, issue 15, 1-18

Abstract: To protect the battery, radio energy transmission charging typically uses constant current (CC) charging before switching to constant voltage (CV) charging to enhance battery durability. This paper proposes adding an auxiliary clamp coil to the original circuit topology. The IPT battery charger designed with the auxiliary clamp coil can achieve both constant current (CC) and constant voltage (CV) outputs. The mutual inductance between the auxiliary clamp coil and the primary side coil greatly influences the output performance of the entire IPT system, so the auxiliary clamp coil should not be too large. To solve this problem, an S-S-PS circuit with secondary compensation topology in the secondary coil is proposed. This circuit topology reduces the size of the auxiliary clamp coil, allowing it to be placed in an optimal position. When the constant voltage output critical position is reached, the IPT system can still automatically, continuously, and smoothly switch between CC and CV modes. Consequently, this approach avoids increased cost consumption associated with detecting CC-CV switching thresholds, adding wireless transmission communication modules, real-time control of the power transmitter, and active protection of the circuit during constant current charging. Finally, a 48 V/2.5 A prototype was built to verify that the IPT system has CC-CV conversion functionality.

Keywords: battery charging; auxiliary clamp coil; constant current output (CC); constant voltage output (CV); induced power output (IPT); constant current and constant voltage output mode conversion (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/17/15/3606/pdf (application/pdf)
https://www.mdpi.com/1996-1073/17/15/3606/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:17:y:2024:i:15:p:3606-:d:1440676

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().