Abstract
In the contactless unregulated power converter application with high output current, optimizing coil structures and using synchronous rectification are important for achieving high efficiency. This paper proposes a separated planar structure of coils to achieve the design goals and gives its equivalent circuit model. On the power transmitting pad, double coils are used to enhance the ability of the output power levels. In order to implement full-wave synchronous rectification (FWSR), the power receiving pad also adopts double coils. The power coils on both sides have similar structures to obtain a balance-induced voltage in each half of the switching period, and the principles of the optimal turn ratio in coils are discussed. Meanwhile, four typical self-driven coil structures are compared and analyzed. The effect of the coupling coefficient and load currents on the loss of the duty cycle is discussed. To satisfy the requirements of output voltage, the rules for selecting the minimum ferrite core are summarized. A 120 W unregulated intermediate bus converter is built. The whole system achieves 90.7% efficiency under all loading ranges, and the maximum efficiency of the system is 94.5% at a 3.5A load current.
Highlights
Electronic systems are designed as isolated modular structures to enhance the flexibility or the productivity of the system [1,2,3,4,5]
Based on the functional modular design structures, the system can be built in a few weeks and is easy to install
This paper proposes a structure for a contactless power converter with self-driven synchronous coils on the pad is investigated to generate a symmetrically induced voltage
Summary
Electronic systems are designed as isolated modular structures to enhance the flexibility or the productivity of the system [1,2,3,4,5]. An aadditional power battery may be form a resonant tank in circuits can greatly enhance the voltage gain and transmission power, but the betweenintwo coils in a contactless transformer, traditional solutions suffered low voltage gain and needed each separated module and will weigh the system obviously. AC so design the double coils tothe form the center-tapped in the receiver side.ofInthe order cycle in thethe double coils,induction we needed investigate the arrangement of in thethe double coils in we the to generate balanced voltageto during every half of the AC cycle double coils, transfer side.toAt the same the time, we use the of skills of a synchronous replace thesame diodes to needed investigate arrangement the double coils in therectifier transferto side. This paper proposes a structure for a contactless power converter with self-driven synchronous coils on the pad is investigated to generate a symmetrically induced voltage.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
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
