Abstract
The demand for wireless power transfer (WPT) systems that can maintain a
constant voltage output (CVO)characteristic is gradually increasing in
some practical application areas of WPT, such as industrial power
supplies. However, existing CVO-type systems are often limited by the
parameter design of the loosely coupled transformer (LCT) and the
configuration of the receiver side is not compact enough. Therefore,
this paper proposes a strongly coupled system with CVO function composed
of capacitor-inductor-capacitor-none (CLC-N) topology. The system’s
primary side uses a CLC compensation, while the secondary side conforms
to a minimalist design without the need for compensation components such
as capacitors and inductors. The initial segment of the paper pertains
to the discussion of the conditions required to satisfy both
zero-phase-angle (ZPA) and CVO functionality of the suggested system.
Subsequently, an in-depth approach to parameter design is outlined,
accentuating that the output voltage remains unrestricted by the LCT’s
parameters. Additionally, this paper examines the realization of
zero-voltage switching (ZVS) within the suggested system, as well as the
influence that variations in compensation components have on the CVO
function. To underscore the benefits of the suggested CVO-type WPT
system that employs CLC-N compensation, the paper presents a comparison
with a range of other CVO-type WPT systems. Ultimately, an experimental
prototype is fabricated to test the theoretical framework, and the
results from these experiments confirm the feasibility of the suggested
CVO-type WPT system based on CLC-N compensation.