scholarly journals Design of a New Hybrid Topology of WPT System to Achieve Load-Independent Constant-Current and Constant-Voltage Output

Symmetry ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1453
Author(s):  
Masood Rehman ◽  
Perumal Nallagownden ◽  
Zuhairi Baharudin
Keyword(s):  
Mathematical Analysis ◽  
Lithium Ion ◽  
Constant Current ◽  
Power Transfer ◽  
Constant Voltage ◽  
Wireless Power ◽  
Hybrid Topology ◽  
Input Source ◽  
Independent Constant ◽  
Li Ion

The usage of the Wireless Power Transfer (WPT) technique for charging lithium-ion (Li-ion) batteries of electric vehicles (EVs) is increasing rapidly. The Li-ion battery requires constant current (CC) followed by constant-voltage (CV) supply for efficient battery charging and to enhance its lifespan. However, it is hard to obtain CC and CV outputs due to the variation of battery resistance during charging. Moreover, a zero-phase angle (ZPA) of the input source is essential to improve the power transfer capability. Therefore, this paper proposes a new hybrid compensation topology to achieve load-independent CC and CV behavior of the WPT system along with ZPA. Two symmetrical coils have been used in the proposed WPT system as transmitter (Tx) and receiver (Rx) coils. A comprehensive mathematical analysis for achieving CC and CV characteristics as well as for power losses is carried out. A new hybrid compensation is designed by combining Series–Series (SS) and Inductor–Capacitor–Capacitor/Series (LCC-S) compensation topologies along with two additional switches. The proposed compensation works on single resonance frequency, and it is simple, reliable, and easy to implement with only one compensation capacitor from the Rx side. Simulations are performed, and a prototype is fabricated to verify the mathematical analysis and simulation results. The overall result shows that the mathematical analysis and simulations comply with the experimental results. Full load efficiencies of 90.33% and 88.91% are achieved in the CC and CV modes, respectively.

scholarly journals Reconfigurable Hybrid Resonant Topology for Constant Current/Voltage Wireless Power Transfer of Electric Vehicles

Electronics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 1323
Author(s):  
Sang-Hoon Hwang ◽  
Yafei Chen ◽  
Hailong Zhang ◽  
Kang-Yoon Lee ◽  
Dong-Hee Kim
Keyword(s):  
Detailed Analysis ◽  
Electric Vehicles ◽  
Constant Current ◽  
Maximum Efficiency ◽  
Constant Voltage ◽  
Wireless Power ◽  
Stable Mode ◽  
Hybrid Topology ◽  
Current Voltage ◽  
Output Characteristics

This paper proposes a reconfigurable hybrid topology (RHT) for the constant current (CC)/constant voltage (CV) charging of electric vehicles. The proposed system combines the series–series and the inductor and double capacitors-series topologies. Two AC switches (ACSs) are utilized to change the CC and CV charging modes, without requiring an additional resonant network. A detailed analysis for designing the hybrid topology parameters is also presented; a three-kilowatt prototype was configured based on this analysis in order to validate the proposed system. The constructed prototype confirmed the stable mode changes, load fluctuations, CC/CV output characteristics and efficiency of the proposed system. The maximum efficiency of the proposed RHT was found to be 92.58%.

scholarly journals A Wireless Power Transfer Charger with Hybrid Compensation Topology for Constant Current/Voltage Onboard Charging

2021 ◽  
Vol 11 (16) ◽  
pp. 7569
Author(s):  
Guangyao Li ◽  
Dong-Hee Kim
Keyword(s):  
Wireless Power Transfer ◽  
Constant Current ◽  
Maximum Efficiency ◽  
Power Transfer ◽  
Wireless Power ◽  
Control Logic ◽  
Zero Voltage Switching ◽  
Hybrid Topology ◽  
Battery Chargers ◽  
Current Voltage

Compared with plugged-in chargers, wireless power transfer (WPT) systems for battery chargers have numerous advantages, e.g., safety, efficiency, and convenience. To satisfy the important wireless charging requirements of efficiency and safety of the battery, this paper proposes a constant current/voltage (CC/CV) charging compensation topology with near-communication based on receiving-side hybrid topology switching, which is unaffected by the dynamic loads. The proposed hybrid topology is systematically analyzed by using the M-mode, and the system parameters are designed to satisfy the constraints of zero phase angle (ZPA) and the specified CC output. In the CV mode, one shunt capacitor is employed to the compensation topology for the CV output and ZPA realization. Both the CC and CV modes are operated under the conditions of zero voltage switching (ZVS) for reducing the loss of the WPT systems. The proposed hybrid compensation topology is controlled by the receiving side and does not require real-time communication to avoid sophisticated control logic. Finally, a 1.1-kW experimental prototype charger based on DS-LCC and LCC-S topologies was established to verify the charging performance of the proposed WPT systems. The maximum efficiency of the proposed WPT charger was found to be approximately 91%. The experimental results were consistent with those of the theoretical analysis.

scholarly journals Rancang Bangun Solar Charger Dengan Maximum Power Point Tracking (MPPT) Dan Kontrol Proportional Integral Derivative (PID) Untuk Pengisian Baterai Lithium-Ion

2021 ◽  
Vol 8 (2) ◽  
pp. 120-130
Author(s):  
Novie Ayub Widarko ◽  
Irianto Irianto ◽  
Agus Tami
Keyword(s):  
Lithium Ion ◽  
Buck Converter ◽  
Constant Current ◽  
Constant Voltage ◽  
Maximum Power Point ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Incremental Conductance ◽  
Li Ion ◽  
Power Point

Solar Charger merupakan alat untuk mengisi energi baterai dengan memanfaatkan panel surya. Pada umumnya, proses pengisian baterai dengan solar charger masih menggunakan metode Constant Current-Constant Voltage. Penerapan metode Constant Current-Constant Voltage pada solar charger memiliki kelemahan yaitu pada mode Constant Current, Saat panel surya tidak mampu mencapai arus yang ditentukan maka akan terjadi drop tegangan sehingga tidak terjadi pengisian pada baterai. Permasalahan yang dihadapi dari penggunaan solar charger adalah keluaran panel surya yang fluktuatif dipengaruhi oleh beberapa parameter yaitu suhu, intensitas cahaya dan pembebanan yang diberikan. Sehingga diperlukan sebuah kontrol yang dapat mentracking agar keluaran panel surya dapat dimaksimalkan untuk melakukan pengisian baterai. Pada penelitian ini memanfaatkan buck converter sebagai solar charger serta metode yang digunakan yaitu MPPT modified incremental conductance bertujuan untuk mencari daya maksimum keluaran panel surya dan PID metode analitik untuk menghasilkan tegangan keluaran konverter yang konstan untuk pengisian baterai Li-Ion. Dari hasil tracking maksimum MPPT metode modified incremental conductance pada iradiasi 1000W/m2 dengan duty cycle 70% menghasilkan keluaran daya maksimum buck converter 99,53W serta tegangan keluaran buck converter 12,52V dan arus 7,95A. Kontrol PID dengan nilai parameter KP=7,8, KI=50000, dan KD=0,000304 digunakan untuk mendapatkan tegangan keluaran buck converter konstan sebesar 12,6V.

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