scholarly journals Research on Characteristics of Wireless Power Transfer System Based on U-Type Coupling Mechanism

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Jia Jinliang ◽  
Yan Xiaoqiang
Keyword(s):  
Power Supply ◽  
Wireless Power Transfer ◽  
Secondary Coil ◽  
Coupling Mechanism ◽  
Transfer System ◽  
Power Transfer ◽  
Wireless Power ◽  
Primary Coil ◽  
Type Coupling ◽  
Wireless Power Transfer System

Aiming at the power supply problem of high-speed rotating equipment, a wireless power transfer system based on U-shaped core coupling mechanism with a primary coil is proposed. Firstly, the transfer model of the U-type coupling mechanism wireless power transfer system is established. The expressions of transfer power and transfer efficiency are obtained by theoretical calculation, and the factors affecting the transfer characteristics of the system are analyzed. At the same time, the magnetic field distribution of the system and the coupling parameters change when the relative position of the primary and secondary coils changes through simulation analysis. Finally, an experimental platform is established for experimental verification. The results show that the system can obtain 1.72 w output power with 51.19% transfer efficiency when the distance between the secondary coil and U-core is 15 mm and 30 mm, respectively. The transmission efficiency and power of the primary coil and secondary coil under different misalignments are tested and compared. It is proved that the wireless power transfer system based on U-type coupling mechanism can effectively realize the stable power supply of the rotating equipment monitoring system.

scholarly journals A Real-Car Experiment of a Dynamic Wireless Power Transfer System Based on Parallel-Series Resonant Topology

2019 ◽  
Vol 10 (3) ◽  
pp. 49
Author(s):  
Toshiyuki Fujita ◽  
Hiroyuki Kishi ◽  
Hiroshi Uno ◽  
Yasuyoshi Kaneko
Keyword(s):  
Electric Power ◽  
Electric Vehicles ◽  
Wireless Power Transfer ◽  
Secondary Coil ◽  
Transfer System ◽  
Power Transfer ◽  
Wireless Power ◽  
Series Resonant ◽  
Wireless Power Transfer System ◽  
Parallel Series

A short mileage and long charging times are problems facing electric vehicles (EVs), and dynamic wireless power transfer (WPT) systems are one of the most effective solutions to overcome these shortcomings. This paper proposes a dynamic WPT system consisting of several stationary primary underground coils and a secondary coil on an EV. The dynamic WPT system employed solenoid coils that were superior to circular coils in terms of misalignment to the traveling direction. A dynamic WPT system rated at 25 kW was designed, constructed, and tested to verify the principles of operation; that is, the capability of supplying electric power continuously.

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>

Inverter-Rectifier Using SiC Power Devices for Bidirectional Wireless Power Transfer System of Electric Vehicles

2014 ◽  
Vol 778-780 ◽  
pp. 1100-1103
Author(s):  
Michihiro Hachisuka ◽  
Takuya Fukuhara ◽  
Yasuyoshi Kaneko ◽  
Shigeru Abe
Keyword(s):  
Electric Vehicles ◽  
Power Supply ◽  
Wireless Power Transfer ◽  
Transfer System ◽  
Power Transfer ◽  
Wireless Power ◽  
Power Devices ◽  
Supply Circuit ◽  
Power Supply Circuit ◽  
Wireless Power Transfer System

The bidirectional wireless power transfer system will have many advantages to charge the batteries of the electric vehicles. In their power supply circuit, the efficiency of the inverter and rectifier is important for total system efficiency. The inverter-rectifier, which is a type of power supply circuit in this system, performs inverter operation and rectifier operation. To reduce the loss of operation modes of both, we decided to use SiC power devices that are able to reduce switching loss. However, there is a problem of high conduction loss caused by the use of SiC power devices in rectifier operation. We propose the method of parallelizing SiC-MOSFET and diode of low forward voltage, and achieved a higher efficiency.

scholarly journals Method for detecting vertical offset of coupling coil using signal coil based on magnetic coupling resonance wireless power transfer system

2021 ◽  
Vol 248 ◽  
pp. 02010
Author(s):  
Ye Zhaohong ◽  
Gao Yuan
Keyword(s):  
Data Transfer ◽  
Magnetic Coupling ◽  
Wireless Power Transfer ◽  
Exponential Fitting ◽  
Coupling Mechanism ◽  
Transfer System ◽  
Power Transfer ◽  
Wireless Power ◽  
Position Detection ◽  
Wireless Power Transfer System

To improve the reliability in wireless power transfer system, communication is widely used. An independent coil as the signal coil for data transfer has the advantage of decoupling power coupling mechanism and signal coil when designing the system. Besides, in some application, vertical offset of the power coil may impact the stability of the system, position detection of the receiver side power coil is needed. Method of using the signal coil for vertical offset detection is adopted in this paper, simulation result verified the feasibility. The vertical offset of the power coil can be estimated by an exponential function based on the system parameter and the current of the primary side power coil. The exponential fitting function used in the paper can be used as a reference when designing the detection.

scholarly journals Research on Desktop Wide Range Wireless Power Transfer Based on High Frequency Electric Field

2021 ◽  
Vol 12 (3) ◽  
pp. 141
Author(s):  
Xiyou Chen ◽  
Zhe Wang ◽  
Zhengying Lang ◽  
Tao Li ◽  
Chen Qi
Keyword(s):  
Power Supply ◽  
High Frequency ◽  
Wireless Power Transfer ◽  
Electrical Equipment ◽  
Transfer System ◽  
Power Transfer ◽  
Wireless Power ◽  
High Frequency Electric Field ◽  
Wireless Power Transfer System ◽  
Wireless Power Supply

This paper proposes a desktop wireless power transfer system that can wirelessly supply power to electrical equipment in a certain space above the aluminum foil using only a high-frequency electric field. Compared with other wireless power supply systems, this system has a smaller power receiving device and a wider power supply range, which is convenient for wireless power supply of portable electrical equipment and low-power electric vehicles. The power receiving device of the system is only the size of a mobile phone, and the power supply range can reach 1.2 m2. This article introduces the system design, electromagnetic field simulation and experiment of the desktop wireless power transfer system. The experimental results show that by using a mobile phone-sized receiving device to connect a light bulb and a fan, multiple loads can simultaneously receive power in a specific space above the desktop power supply. In addition, people can hold the power receiving device for wireless charging.

Sign in / Sign up

Export Citation Format

Share Document