Abstract
This paper proposes the modeling and design of a controller for an inductive power transfer (IPT) system with a semi-bridgeless active rectifier (S-BAR). This system consists of a double-sided Inductor-Capacitor-Capacitor (LCC) compensation network and an S-BAR, and maintains a constant output voltage under load variation through the operation of the rectifier switches. Accurate modeling is essential to design a controller with good performance. However, most of the researches on S-BAR have focused on the control scheme for the rectifier switches and steady-state analysis. Therefore, modeling based on the extended describing function is proposed for an accurate dynamic analysis of an IPT system with an S-BAR. Detailed mathematical analyses of the large-signal model, steady-state operating solution, and small-signal model are provided. Nonlinear large-signal equivalent circuit and linearized small-signal equivalent circuit are presented for intuitive understanding. In addition, worst case condition is selected under various load conditions and a controller design process is provided. To demonstrate the effectiveness of the proposed modeling, experimental results using a 100 W prototype are presented.
Highlights
In an inductive power transfer (IPT) system, where input power is physically separated from load, power is transferred by the magnetic coupling of the transmitter coil and receiver coil [1,2,3,4]
Among the various compensation topologies, the double-sided Inductor-Capacitor-Capacitor (LCC) compensation topology has the advantage that the resonant frequency and transmitter coil current are independent of the coupling coefficient and load [10,11,12,13,14]
Based on an impedance analysis of a double-sided LCC compensation topology, the frequency that achieves a CC or CV output characteristics was selected, and the operating frequency was changed according to the mode
Summary
In an inductive power transfer (IPT) system, where input power is physically separated from load, power is transferred by the magnetic coupling of the transmitter coil and receiver coil [1,2,3,4]. Based on an impedance analysis of a double-sided LCC compensation topology, the frequency that achieves a CC or CV output characteristics was selected, and the operating frequency was changed according to the mode This method has the advantage of achieving a constant voltage output under zero phase angle (ZPA) conditions without additional switches. The output voltage is controlled through the operation of the rectifier switches without increasing the number of devices or adding a back-end converter, making it possible to achieve a high power density and efficiency. A control-to-output voltage transfer function is obtained using the a modeling method the extended describing function (EDF)the thatworst considers duty ratio small-signal model, based and a on voltage controller design that considers case the conditions is variation ofTothedemonstrate rectifier switch described inofdetail, and large-signal and small-signal discussed. Demonstrate the effectiveness of the proposed modeling and designed controller, various experimental results using a 100 W prototype are provided
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
