scholarly journals A Design Method of Compensation Circuit for High-Power Dynamic Capacitive Power Transfer System Considering Coupler Voltage Distribution for Railway Applications

Electronics ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 153
Author(s):  
Jianying Liang ◽  
Donghua Wu ◽  
Jin Yu
Keyword(s):  
High Power ◽  
Power Supply ◽  
Design Method ◽  
Experimental Setup ◽  
Transfer System ◽  
Power Transfer ◽  
Voltage Distribution ◽  
Compensation Circuit ◽  
Small Coupling ◽  
Coupling Capacitor

Capacitive power transfer (CPT) is a promising method to solve the problems caused by the traditional Pantograph-catenary contact power supply for railway applications. In contrast, the CPT system suffers a broken risk because of the small coupling capacitor. This paper has analyzed the CPT coupler’s voltage distributions for dynamic CPT systems when high power is required in real railway applications. The triangle relationship among the coupler voltages is derived. The circuit of the CPT system to accolated the coupler voltage is analyzed. Then, the compensation parameters are given. With the adopted LCLC-CL topology, the design process is presented by considering the coupler voltages. An experimental setup is conducted to validate the proposed design method. The experimental results show that the system can achieve 3 kW output power with 92.46% DC-DC efficiency and the voltage distribution aggress well with the designed values.

scholarly journals Frequency Tuning in Inductive Power Transfer Systems

Electronics ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 527
Author(s):  
Manuele Bertoluzzo ◽  
Giuseppe Buja
Keyword(s):  
Electric Vehicle ◽  
Power Supply ◽  
Frequency Tuning ◽  
The Other ◽  
Experimental Setup ◽  
Power Transfer ◽  
Inductive Power Transfer ◽  
Resonance Frequencies ◽  
Power Transfer Efficiency ◽  
Inductive Power

Inductive power transfer systems (IPTSs) systems are equipped with compensation networks that resonate at the supply frequency with the inductance of the transmitting and receiving coils to both maximize the power transfer efficiency and reduce the IPTS power sizing. If the network and coil parameters differ from the designed values, the resonance frequencies deviate from the supply frequency, thus reducing the IPTS efficiency. To cope with this issue, two methods of tuning the IPTS supply frequency are presented and discussed. One method is aimed at making resonant the impedance seen by the IPTS power supply, the other one at making resonant the impedance of the receiving stage. The paper closes by implementing the first method in an experimental setup and by testing its tuning capabilities on a prototypal IPTS used for charging the battery of an electric vehicle.

scholarly journals The Interaction between Load Circuits and Decision of Frequency for Efficient Wireless Power Transfer

2018 ◽  
Vol 8 (3) ◽  
pp. 1331
Author(s):  
Kazuya Yamaguchi
Keyword(s):  
Power Supply ◽  
Natural Frequencies ◽  
Wireless Power Transfer ◽  
Transfer System ◽  
Power Transfer ◽  
Wireless Power ◽  
Ac Power ◽  
Wireless Power Transfer System ◽  
Efficient Transfer ◽  
The Ideal

<pre>This paper derives an expression of efficiency of wireless power transfer on a situation that there are two devices towards one AC power supply. The interaction between a power supply and load is paid attention on a conventional wireless power transfer system, in contrast, the interaction between loads must be taken account of on the situation too. This is attributed to a possibility that a load disturbs the energy transmitted from a power supply to another load. Moreover each load needs different frequency of power supply for the ideal transfer since they have different natural frequencies on many situations. This paper models a circumstance that there are a power supply and two loads with a state space equation, and proposes how to decide a frequency of power supply to realize efficient transfer for each load.</pre>

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