A Novel Designed Load Adaptive Noncontact Wet-Mate Connector for Subsea Devices

2017 ◽  
Vol 51 (4) ◽  
pp. 31-40
Author(s):  
Dejun Li ◽  
Tianlei Wang ◽  
Canjun Yang
Keyword(s):  
Quality Factor ◽  
Data Transfer ◽  
Input Voltage ◽  
Resistance Ratio ◽  
Transfer Efficiency ◽  
Power Transfer ◽  
Load Voltage ◽  
Power Transfer Efficiency ◽  
Secondary Side ◽  
Secondary Winding

AbstractWet-mate connectors enable subsea devices to have power and data transferred simultaneously. Conventional wet-mate connectors must strictly demand water-tightness and consequently have a limited number of mating cycles and are costly. This paper proposed a novel noncontact wet-mate connector based on inductive power transfer technology, which is safer, more durable, and less expensive. Structure, power transfer, and data transfer designs are introduced, and a series-parallel compensating topology is applied in the power circuits for load adaptability. A simultaneous power and data transfer experiment is conducted on a 48 VDC/400 W prototype connector, which demonstrates the prototype connector to have a stable output voltage of 48 V, a power transfer efficiency over 80%, and a data transfer rate of over 2 MB/s.<def-list>Nomenclature<def-list><def-item><term>L1</term><def>Inductance value of the primary winding</def></def-item><def-item><term>L2</term><def>Inductance value of the secondary winding</def></def-item><def-item><term>M</term><def>Mutual inductance value between the windings</def></def-item><def-item><term>k</term><def>Coupling coefficient between the windings</def></def-item><def-item><term>Rw1</term><def>AC winding resistance of the primary winding</def></def-item><def-item><term>Rw2</term><def>AC winding resistance of the secondary winding</def></def-item><def-item><term>Rdc1</term><def>DC winding resistance of the primary winding</def></def-item><def-item><term>Rdc2</term><def>DC winding resistance of the secondary winding</def></def-item><def-item><term>F1</term><def>AC-to-DC winding resistance ratio of the primary winding</def></def-item><def-item><term>F2</term><def>AC-to-DC winding resistance ratio of the secondary winding</def></def-item><def-item><term>Ip</term><def>Primary winding current</def></def-item><def-item><term>Is</term><def>Secondary winding current</def></def-item><def-item><term>IL</term><def>Load current</def></def-item><def-item><term>Ic2</term><def>Parallel capacitance current of the secondary side</def></def-item><def-item><term>Uin</term><def>Input voltage</def></def-item><def-item><term>UL</term><def>Load voltage</def></def-item><def-item><term>C1</term><def>Series compensation capacitance of the secondary side</def></def-item><def-item><term>C2</term><def>Parallel compensation capacitance of the secondary side</def></def-item><def-item><term>F</term><def>Operating frequency</def></def-item><def-item><term>ω</term><def>Operating angular frequency</def></def-item><def-item><term>RL</term><def>Load resistance</def></def-item><def-item><term>k</term><def>Voltage gain from the input voltage to the load voltage</def></def-item><def-item><term>η</term><def>Power transfer efficiency</def></def-item><def-item><term>Q1</term><def>Quality factor of the primary winding</def></def-item><def-item><term>Q2</term><def>Quality factor of the secondary winding</def></def-item><def-item><term>Zs</term><def>Impedance of the secondary side</def></def-item><def-item><term>Zr</term><def>Reflected impedance on the primary side</def></def-item></def-list></def-list>

scholarly journals Maximizing Transfer Efficiency with an Adaptive Wireless Power Transfer System for Variable Load Applications

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1417
Author(s):  
Jung-Hoon Cho ◽  
Byoung-Hee Lee ◽  
Young-Joon Kim
Keyword(s):  
Loading Condition ◽  
Wireless Power Transfer ◽  
Input Voltage ◽  
Transfer Efficiency ◽  
Maximum Efficiency ◽  
Variable Load ◽  
Power Transfer ◽  
Wireless Power ◽  
Variable Loading ◽  
Power Transfer Efficiency

Electronic devices usually operate in a variable loading condition and the power transfer efficiency of the accompanying wireless power transfer (WPT) method should be optimizable to a variable load. In this paper, a reconfigurable WPT technique is introduced to maximize power transfer efficiency in a weakly coupled, variable load wireless power transfer application. A series-series two-coil wireless power network with resonators at a frequency of 150 kHz is presented and, under a variable loading condition, a shunt capacitor element is added to compensate for a maximum efficiency state. The series capacitance element of the secondary resonator is tuned to form a resonance at 150 kHz for maximum power transfer. All the capacitive elements for the secondary resonators are equipped with reconfigurability. Regardless of the load resistance, this proposed approach is able to achieve maximum efficiency with constant power delivery and the power present at the load is only dependent on the input voltage at a fixed operating frequency. A comprehensive circuit model, calculation and experiment is presented to show that optimized power transfer efficiency can be met. A 50 W WPT demonstration is established to verify the effectiveness of this proposed approach.

Theoretical Analysis of Power Transfer Performance of Primary and Secondary Compensation Topology of Inductive Coupled Power Transfer System

2012 ◽  
Vol 529 ◽  
pp. 43-48
Author(s):  
Xu Zhang ◽  
Guo Ying Meng
Keyword(s):  
Electromagnetic Induction ◽  
Transfer Efficiency ◽  
Current Gain ◽  
Transfer System ◽  
Voltage Gain ◽  
Power Transfer ◽  
Leakage Inductance ◽  
Loosely Coupled ◽  
Power Transfer Efficiency ◽  
Secondary Side

Inductive coupled power transfer system is based on the principle of electromagnetic induction to transfer power from the primary side to the secondary side of a loosely coupled transformer, which can transfer electricity wirelessly. The loosely coupled transformer has large leakage inductance, which reduces the power transfer efficiency. In order to reduce the leakage inductance, a capacitance is used at the primary side and secondary side of a loosely coupled transformer, which can increase the power transfer efficiency. For four different compensation structures, this paper analyses the coupling coefficient and the secondary quality factor’s influence on the voltage gain, current gain and transfer efficiency, and also compares different compensation structures

scholarly journals Transmitter Module Optimization for Wireless Power Transfer Systems with Single Transmitter to Multiple Receivers

Mathematics ◽  
2021 ◽  
Vol 9 (22) ◽  
pp. 2928
Author(s):  
Joungha Lee ◽  
Seung Beop Lee
Keyword(s):  
Wireless Power Transfer ◽  
Transfer Efficiency ◽  
Total Power ◽  
Receiver Coil ◽  
Power Transfer ◽  
Wireless Power ◽  
Load Voltage ◽  
Multiple Receivers ◽  
Power Transfer Efficiency ◽  
Transmitter Coil

Most of the coil designs for wireless power transfer (WPT) systems have been developed based on the “single transmitter to a single receiver (S-S)” WPT systems by the empirical design approaches, partial domain searches, and shape optimization methods. Recently, the layout optimizations of the receiver coil for S-S WPT systems have been developed using gradient-based optimization, fixed-grid (FG) representation, and smooth boundary (SB) representation. In this paper, the new design optimization of the transmitter module for the “single transmitter to multiple receivers (S-M)” WPT system with the resonance optimization for the S-M WPT system is proposed to extremize the total power transfer efficiency while satisfying the load voltage (i.e., rated power) required by each receiver and the total mass used for the transmitter coil. The proposed method was applied to an application model (e.g., S-M WPT systems with two receiver modules). Using the sensitivity of design variables with respect to the objective function (i.e., total power transfer efficiency) and constraint functions (i.e., load voltage of each receiver module and transmitter coil mass) at each iteration of the optimization process, the proposed method determines the optimal transmitter module that can maximize the total power transfer efficiency while several constraints are satisfied. Finally, the optimized transmitter module for the S-M WPT system was demonstrated through comparison with experiments under the same conditions as the simulation environment.

scholarly journals Magnetic nozzle radiofrequency plasma thruster approaching twenty percent thruster efficiency

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Kazunori Takahashi
Keyword(s):  
Magnetic Field ◽  
Electric Propulsion ◽  
Transfer Efficiency ◽  
Rf Plasma ◽  
Power Transfer ◽  
Rf Power ◽  
Plasma Production ◽  
Magnetic Nozzle ◽  
Plasma Thruster ◽  
Power Transfer Efficiency

AbstractDevelopment of a magnetic nozzle radiofrequency (rf) plasma thruster has been one of challenging topics in space electric propulsion technologies. The thruster typically consists of an rf plasma source and a magnetic nozzle, where the plasma produced inside the source is transported along the magnetic field and expands in the magnetic nozzle. An imparted thrust is significantly affected by the rf power coupling for the plasma production, the plasma transport, the plasma loss to the wall, and the plasma acceleration process in the magnetic nozzle. The rf power transfer efficiency and the imparted thrust are assessed for two types of rf antennas exciting azimuthal mode number of $$m=+1$$ m = + 1 and $$m=0$$ m = 0 , where propellant argon gas is introduced from the upstream of the thruster source tube. The rf power transfer efficiency and the density measured at the radial center for the $$m=+1$$ m = + 1 mode antenna are higher than those for the $$m=0$$ m = 0 mode antenna, while a larger thrust is obtained for the $$m=0$$ m = 0 mode antenna. Two-dimensional plume characterization suggests that the lowered performance for the $$m=+1$$ m = + 1 mode case is due to the plasma production at the radial center, where contribution on a thrust exerted to the magnetic nozzle is weak due to the absence of the radial magnetic field. Subsequently, the configuration is modified so as to introduce the propellant gas near the thruster exit for the $$m=0$$ m = 0 mode configuration and the thruster efficiency approaching twenty percent is successfully obtained, being highest to date in the kW-class magnetic nozzle rf plasma thrusters.

Wireless Power Transfer Systems via Strong Coupled Magnetic Resonances — Design, PCB Implementation and Tests

2011 ◽  
Vol 383-390 ◽  
pp. 5984-5989
Author(s):  
Yan Ping Yao ◽  
Hong Yan Zhang ◽  
Zheng Geng
Keyword(s):  
Printed Circuit Board ◽  
Experimental System ◽  
Wireless Power Transfer ◽  
Circuit Board ◽  
Transfer Efficiency ◽  
Power Transfer ◽  
Wireless Power ◽  
Power Transfer Efficiency ◽  
Coil Winding ◽  
Magnetic Resonances

In this paper, we present theoretical analysis and detailed design of a class of wireless power transfer (WPT) systems based on strong coupled magnetic resonances. We established the strong coupled resonance conditions for practically implementable WPT systems. We investigated the effects of non-ideal conditions presented in most practical systems on power transfer efficiency and proposed solutions to deal with these problems. We carried out a design of WPT system by using PCB (Printed Circuit Board) antenna pair, which showed strong coupled magnetic resonances. The innovations of our design include: (1) a new coil winding pattern for resonant coils that achieves a compact space volume, (2) fabrication of resonant coils on PCBs, and (3) integration of the entire system on a pair of PCBs. Extensive experiments were performed and experimental results showed that our WPT system setup achieved a guaranteed power transfer efficiency 14% over a distance of two times characteristic length(44cm). The wireless power transfer efficiency in this PCB based experimental system was sufficiently high to lighten up a LED with a signal generator.

Simulating Ultrasound Piezoelectric Power Transfer in the Near Field and Experimental Validations

2021 ◽  
Vol 05 ◽  
Author(s):  
Ammar Mohammed ◽  
Changki Mo ◽  
John Miller ◽  
David Lowry ◽  
Jassim Alhamid
Keyword(s):  
Energy Transfer ◽  
Lead Zirconate Titanate ◽  
Near Field ◽  
Acoustic Power ◽  
Acoustic Energy ◽  
Transfer Efficiency ◽  
Ultrasonic Power ◽  
Power Transfer ◽  
Piezoelectric Energy ◽  
Power Transfer Efficiency

Background: Acoustic power transfer is a method for wireless energy transfer to implanted medical devices that permits a greater range of separation between transmitter and receiver than is possible with inductive power transfer. In some cases, short-distance ultrasonic power transfer may be employed; consequently, their operation may be complicated by the near-field aspects of piezoelectric acoustic energy transfer. Methods: A piezoelectric energy transfer system consisting of two lead zirconate titanate (PZT) transducers was analyzed in this work using a combination of experimental measurements and computer simulations. Results: Simulations using the COMSOL Software package showed good agreement with a measured output voltage as a function of the distance between and alignment of the transmitter and receiver with water as a medium. We also simulated how operating frequency affects power transfer efficiency at various distances between the transmitter and receiver and found reasonable agreement with experiments. We report model predictions for power transfer efficiency as a function of the thickness and diameter of the transmitter and receiver. Conclusion: The results show that with proper choice of parameters, piezoelectric systems can provide high power transfer efficiency in the near-field region.

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