Analysis and design of an LCC/S compensated resonant converter for inductively coupled power transfer

Wang, Yijie; Wang, Haoyu; Liang, Tian; Zhang, Xiangjun; Xu, Dianguo; Cai, Liang

doi:10.1109/itec-ap.2017.8080829

Cited by 26 publications

(11 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the LCC network, the compensation form is mostly T‐shaped network in order to generate a constant current I L 1 which contributes to the stabilization of secondary induced voltage; moreover, pure resistance of the input impedance can be achieved. The relationship between the resonance parameters of its components is shown as follows [30]:

\begin{equation}\omega {L}_{f1} = \frac{1}{{\omega {C}_{f1}}} = \omega {L}_1 - \frac{1}{{\omega {C}_1}}\end{equation}

Furthermore, the secondary impedance Z r , the reflected impedance and the input impedance of the primary side Z in can be expressed as

\begin{equation} \def\eqcellsep{&}\begin{array}{l} {Z}_S = j\omega {L}_2 + 1/j\omega {C}_2 + j{X}_{eq} + {R}_{eq}\\[9pt] {Z}_R = \dfrac{{{\omega }^2{M}^2}}{{{Z}_S}}\\[9pt] {Z}_{IN} = j\omega {L}_{f1} + 1/\left( {j\omega {C}_{f1} + 1/\left( {j\omega {L}_1 + 1/j\omega {C}_1 + {Z}_r} \right)} \right) \end{array} \end{equation}

Substituting () into (), Z IN can be simplified as

$$...

…”

Section: Control Scheme For Constant Voltage Chargementioning

confidence: 99%

An LCC‐S compensated wireless power transfer system using receiver‐side switched‐controlled capacitor combined semi‐active rectifier for constant voltage charging with misalignment tolerance

Wang

Deng

Chen

2023

IET Power Electronics

View full text Add to dashboard Cite

The output characteristics of wireless power transfer systems are strongly susceptible to coupling and load variations. To achieve a constant voltage output under varying coupling and load, a voltage regulation method based on a combination of a semi‐active rectifier (SAR) and a switched‐controlled capacitor (SCC) is proposed for the LCC‐S topology. Adjusting the SAR can effectively regulate the voltage, and the introduction of SCC compensates the impedance brought by SAR, ensuring that the resonance condition is fully satisfied at the receiver side. Thus, the proposed wireless power transfer system can achieve zero phase angle over the entire load and coupling range, minimizing reactive power losses. This control method only needs to collect the signal from the receiver side, which enables single‐side control as well as avoids the wireless communication. The situation of coupler parameter drift due to misalignment is also considered. Even if the self‐inductance changes, the zero phase angle can be guaranteed on the receiving side by adjusting the SCC, and the zero voltage switching of the transmitter side can still be achieved. The principle prototype of 3 kW is constructed and the experimental results prove the effectiveness of the proposed method.

show abstract

\begin{equation}\omega {L}_{f1} = \frac{1}{{\omega {C}_{f1}}} = \omega {L}_1 - \frac{1}{{\omega {C}_1}}\end{equation}

Furthermore, the secondary impedance Z r , the reflected impedance and the input impedance of the primary side Z in can be expressed as

\begin{equation} \def\eqcellsep{&}\begin{array}{l} {Z}_S = j\omega {L}_2 + 1/j\omega {C}_2 + j{X}_{eq} + {R}_{eq}\\[9pt] {Z}_R = \dfrac{{{\omega }^2{M}^2}}{{{Z}_S}}\\[9pt] {Z}_{IN} = j\omega {L}_{f1} + 1/\left( {j\omega {C}_{f1} + 1/\left( {j\omega {L}_1 + 1/j\omega {C}_1 + {Z}_r} \right)} \right) \end{array} \end{equation}

Substituting () into (), Z IN can be simplified as

$$...

…”

Section: Control Scheme For Constant Voltage Chargementioning

confidence: 99%

An LCC‐S compensated wireless power transfer system using receiver‐side switched‐controlled capacitor combined semi‐active rectifier for constant voltage charging with misalignment tolerance

Wang

Deng

Chen

2023

IET Power Electronics

View full text Add to dashboard Cite

show abstract

“…As shown in [27], in the condition of 1 2 3 = =-Z Z Z , the input impedance is purely resistive when the load is resistor. Obviously in CV mode, the secondary side reflection This article has been accepted for publication in a future issue of this journal, but has not been fully edited.…”

Section: E Implementation Of Zpa In CC and Cv Modesmentioning

confidence: 99%

“…Nevertheless, the additional compensation capacitance and inductance introduced on the receiving side will inevitably increase the complexity and reduce the portability of the receiving side, which has the same shortcomings as the first method. To adapt to the principle of lightweight in the receiving side as well as fit the transfer characteristic, the authors of [27][28][29] realize the transformation of CC or CV mode by analyzing the characteristics of LCC-S by circuit equivalence. Analogously, the work by Lu et al [30][31] analyzes the features of high order topologies and summarizes some of the topologies that can implement CC and CV mode.…”

Section: Introductionmentioning

confidence: 99%

A Novel Design Method of LCC-S Compensated Inductive Power Transfer System Combining Constant Current and Constant Voltage Mode via Frequency Switching

et al. 2021

View full text Add to dashboard Cite

Inductive power transfer (IPT) is an attractive wireless power charging option in many applications such as electric vehicle biomedical devices and consumer electronics, etc. Constant current and constant voltage (CC-CV) charging profile is widely used for charging applications due to affecting the life and the reliability of the Li-ion battery. However, the IPT systems that can achieve both CC and CV modes with soft switching are not well studied. This paper presents an inductive power transfer system for wireless charging without a back-end converter, which achieves the required two-stage charging profile with high efficiency by keeping inverters' soft switching operation. The characteristics of an LCC-S compensation topology have been investigated thoroughly. Two fixed resonant frequencies, whose analytical expressions have been derived, can be found to realize constant current output and constant voltage output respectively under zero-phase angle condition. Besides, an effective tuning method has been presented for zero voltage switching realization to reduce the switching loss. Moreover, a parameter design procedure has been summarized for the wireless charger with a simplified structure and high efficiency. Finally, the method is validated through experiments on a 3.5kW prototype realizing constant current and constant voltage outputs with a peak efficiency of 97.3%.

show abstract

“…Thus, their resonant frequencies are irrelevant to the coupling coefficient [11]. For example, LCL, LCC-S, S-CLC, LC-S and double-sided LCC are compensation structures presented in previous articles [11][12][13][14][15]. Although all these compensations are tuned to zero voltage switching (ZVS), the coupling coil size limits the parameter of compensation elements.…”

Section: Introductionmentioning

confidence: 99%

CLL/S Detuned compensation network for electric vehicles wireless charging application

Aziz¹,

Romlie²,

Zulkifli³

2019

IJPEDS

View full text Add to dashboard Cite

<span lang="EN-GB">An electric vehicle (EV) can be charged wirelessly through an inductively coupled power transfer system where the system resonates the inductive coupling coil at the operating frequency by means of a compensation network. However, the resonant behaviour implies overcurrent in the inverter MOSFETs during uncoupled and high load resistor conditions, which affect to the inverter MOSFETs failure whenever the current exceeds their maximum current rating. Therefore, this paper presents a CLL/S detuned compensation network for EV wireless charging application to limit the inverter current during the uncoupled state and open circuit load conditions. The proposed compensation consists of a series capacitor and parallel inductor at the primary side and series capacitor at the secondary side. By using Kirchhoff Voltage Law (KVL) analysis, the primary side is detuned to inductive behaviour to ensure zero voltage switching (ZVS), and the secondary side remains at natural resonant tuning. From the simulation analysis, the slight increase of the parallel inductor value at the primary side can limit of the inverter current at uncoupled and high load resistor conditions. The proposed system also offers higher efficiency than the series-series detuned compensation and slightly lower than the double-sided LCC compensation network at different coupling factor.</span>

show abstract

Analysis and design of an LCC/S compensated resonant converter for inductively coupled power transfer

Cited by 26 publications

References 10 publications

An LCC‐S compensated wireless power transfer system using receiver‐side switched‐controlled capacitor combined semi‐active rectifier for constant voltage charging with misalignment tolerance

An LCC‐S compensated wireless power transfer system using receiver‐side switched‐controlled capacitor combined semi‐active rectifier for constant voltage charging with misalignment tolerance

A Novel Design Method of LCC-S Compensated Inductive Power Transfer System Combining Constant Current and Constant Voltage Mode via Frequency Switching

CLL/S Detuned compensation network for electric vehicles wireless charging application

Contact Info

Product

Resources

About