Modeling and Control of Double-Sided LCC Compensation Topology with Semi-Bridgeless Active Rectifier for Inductive Power Transfer System

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.

Adaptive Second-Order Sliding Mode Control of Buck Converters with Multi-Disturbances

“…Based on the twisting algorithm [35], the design still included the above two steps, ( 6) and ( 7), i.e., a sliding surface and a continuous control law. For the former, the sliding surface was still chosen to be the same as (6), while the control law u was generally designed as…”

“…In order to improve the steady performance of the converter system, the original sliding surface in (6) was improved by introducing the integral term of the state x 1 , i.e.,…”

“…For example, in [5], the magnetic characteristics of inductors were proved to vary greatly in the presence of large magnetic flux density. In [6], the variations of load resistor and input voltage were proved not to be neglected, especially in the case of large signal operation. Therefore, the control of buck converters with satisfactory performance is still a challenging issue to be addressed, especially in the case of parameter perturbations and external disturbances [7,8].…”

“…For the traditional twisting controller in ( 6) and ( 8), two problems exist. On the one hand, due to the asymptotic convergence of the LSM surface in (6), the dynamics of the system are determined by the equation .…”

Design of a High Power, LCC-Compensated, Dynamic, Wireless Electric Vehicle Charging System with Improved Misalignment Tolerance

“…The input to the AC-DC conversion stage is a sinusoidal current, and a boost rectifier circuit is selected for this work to ensure operation in continuous current mode (CCM) [22]. In particular, a symmetrical bridgeless boost rectifier topology was selected, as it provides reduced control complexity and a lesser number of active semiconductor devices per conduction path [67][68][69]. Nevertheless, the conventional model utilizes an inductor in the AC signal path, which adds to the value of the series compensation inductor, L cs , and disturbs the resonance condition.…”