scholarly journals Development of the structure and circuit solution of a bidirectional wireless energy transmission system for swarm robots

2021 ◽  
Vol 18 (2) ◽  
pp. 171-192
Author(s):  
Konstantin Krestovnikov ◽  
Ekaterina Cherskikh
Keyword(s):  
Energy Transfer ◽  
Autonomous Robots ◽  
Resonant Mode ◽  
Optimal Number ◽  
Reverse Direction ◽  
Resonant Circuit ◽  
Transmitted Power ◽  
Energy Transmission ◽  
Transmission Distance ◽  
Limit Value

This paper presents development of a circuit solution design for a bidirectional wireless energy transfer system, based on a resonant self-oscillator. The operation principle of the developed circuit solution in receiving and transmitting mode is described and the elementary circuit diagram is presented together with design ratios. Coil parameters for the resonant circuit are calculated, optimal number of turns in coils is presented, based upon the specified limit value of permissible current. The dependencies of system efficiency from transmitted power, maximum transmitted power, and energy transmission distance are obtained. The developed design, which includes the step-up DC-DC converter, allows to obtain the voltage on the output of the receiving system, equal to or higher than the voltage of the power source of the transmitting system. The specific feature of the proposed system is that it does not require a dedicated control system for operation in resonant mode and changing direction of power transfer. Resonance in transmitting and receiving coils can be maintained, even when their mutual layout is changed, due to utilization of identical resonant circuits and a self-oscillator. Application of the proposed solution is relevant for energy transfer among autonomous robots with limited positioning accuracy, as well as for energy transfer from power supply to robot or in reverse direction.

scholarly journals Approach to Choose of Optimal Number of Turns in Planar Spiral Coils for Systems of Wireless Power Transmission

2020 ◽  
Vol 26 (6) ◽  
pp. 17-24
Author(s):  
Konstantin Krestovnikov ◽  
Ekaterina Cherskikh ◽  
Аleksandr Bykov
Keyword(s):  
Power Transmission ◽  
Correct Choice ◽  
Optimal Number ◽  
Design Parameters ◽  
Resonant Circuit ◽  
Transmitted Power ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Electrical Parameters ◽  
Inductive Power Transmission

Correct choice of coil parameters for resonant circuits in inductive power transmission systems is a relevant problem, as it significantly influences the efficiency and transmitted power in the systems and provides for optimization of these parameters. This paper presents a methodology of calculation of geometrical and electrical parameters and approach to choose the optimal number of turns in planar coils used in the wireless power transmission (WPT) system with parallel resonant circuit. Formulas are derived for calculation of active resistance and inductance of the coil, normalized to the specified design parameters of the coil. Connection is made between the design and electrical parameters of the coil, which allows choosing the optimal number of turns according to different criteria and guard conditions. The examples of practical use of the chosen approach with transmitting and receiving coils of WPT system are presented. The obtained results show that efficiency and transmitted power in the system are higher when using the coils with the calculated number of turns. The proposed approach may be used in selection of optimal design of loop coils in systems with fixed frequency, and in systems, whose operational frequency depends on the parameters of the resonant circuit.

Analysis of the Influence and Number of Turns on the Smartphone Wireless Charger on the Output Power of the Wireless Charger

2020 ◽  
Vol 10 (1) ◽  
pp. 20-25
Author(s):  
Donny Firmansyah
Keyword(s):  
Output Power ◽  
Magnetic Induction ◽  
Secondary Coil ◽  
Wireless Charging ◽  
Transmitted Power ◽  
Primary Coil ◽  
Power Test ◽  
Transmission Distance ◽  
Coil Diameter

Charging the smartphone battery can be done via powerbank or default charger from the smartphone still using the cable for charging the electricity. Charging using a cable certainly limits the use of the smartphone when it is charging. Smartphone users can not be far from the electric socket which of course is troublesome if this happens in the middle of a room that has a few electrical sockets. To solve this problem, now many wireless charging smartphones or smartphones have been developed wireless charger. Behind the benefits obtained from a wireless charger, it also has disadvantages, namely the transmission distance is short, even there is no distance and the transmitted power is unstable. Wireless chargers are based on the principle of magnetic induction in which electricity is transferred between two objects through a coil. Wireless charger consists of the primary coil as a charger (usually in the form of a thin board or cylinder), and the secondary coil is located on the back of the cellphone. Based on the results, the output power is obtained. The largest wireless charger is 0.027W with a coil diameter of 8cm in all the number of primary coils, namely 40 turns, 50 turns, and 60 turns at a primary and secondary coil distance of 0cm to 1cm. The farthest distance from the wireless charger output power test is 6cm as well as the 8cm coil diameter for all the number of primary coil turns, namely 40 turns, 50 turns, and 60 turns.

scholarly journals Improving the Quality of the Underwater Robot’s Contactless Battery Charging System

2021 ◽  
Vol 2096 (1) ◽  
pp. 012107
Author(s):  
V A Gerasimov ◽  
A V Komlev ◽  
A Yu Filozhenko
Keyword(s):  
Power Transformer ◽  
Resonant Circuit ◽  
Transmitted Power ◽  
Battery Charging ◽  
Charging System ◽  
Power Switches ◽  
Scale Experiment ◽  
Switching Mode ◽  
Secondary Side

Abstract A special feature of the contactless battery charging system of an autonomous underwater robot is the use of a transformer with separating primary and secondary windings. As a result, a non-magnetic gap arises, which leads to the need to increase the primary current and the output current of the autonomous inverter. One of the ways to improve the quality of the system is the use of a resonant circuit at the inverter output in combination with the "soft switching" mode of its power switches. The use of resonance on the transformer secondary side also allows you to equalize the current loads of the primary and secondary windings. In this way, a minimum of losses in the inverter is achieved and the power transformer of the system is optimized. This allows you to reduce the size of the system while maintaining the transmitted power, or increase the transmitted power while maintaining the dimensions. The problem solved by using mathematical modelling with verification of the solution adequacy in a full-scale experiment.

scholarly journals Research on Energy Transmission Mechanism of the Electro-Hydraulic Servo Pump Control System

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4869
Author(s):  
Mingkun Yang ◽  
Gexin Chen ◽  
Jianxin Lu ◽  
Cong Yu ◽  
Guishan Yan ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Control System ◽  
Energy Characteristic ◽  
Energy Transfer Efficiency ◽  
Transfer Efficiency ◽  
Volume Control ◽  
Transition Rule ◽  
Energy Transmission ◽  
Characteristic State ◽  
Hydraulic Servo

The electro-hydraulic servo pump control system (EHSPCS) is a volume control system that uses a permanent magnet synchronous motor (PMSM) with a fixed displacement pump to directly drive and control the hydraulic cylinder. The energy transmission law of the system is very complicated due to the transformation of electrical, mechanical and hydraulic energy as well as other energy fields, and qualitative analysis of the energy transfer efficiency is difficult. Energy transfer analysis of the EHSPCS under different working conditions and loads is proposed in this paper. First, the energy flow transfer mechanism was analyzed, and the mathematical and energy transfer models of the key components of the system were established to explore the energy characteristic state transition rule. Second, a power bond diagram model was built, its state equation and state matrix were deduced, and a system simulation model was built. Finally, combined with the EHSPCS experimental platform, simulation experiments were carried out on the dynamic position following and steady-state position holding conditions of the system, and the variation rules of the power of each energy characteristic state and the system energy transfer efficiency under different loads were obtained. The research results provide a foundation for the study of power matching and energy-saving mechanism of the EHSPCS.

CONTROL OF THE ENERGY TRANSFER WITH THE OPTICAL MICROCAVITY

2001 ◽  
Vol 15 (28n30) ◽  
pp. 3704-3708 ◽  
Author(s):  
M. HOPMEIER ◽  
W. GUSS ◽  
M. DEUSSEN ◽  
E. O. GÖBEL ◽  
R. F. MAHRT
Keyword(s):  
Energy Transfer ◽  
Excitation Energy Transfer ◽  
Interaction Strength ◽  
Dipole Interaction ◽  
Resonant Mode ◽  
Phenylene Vinylene ◽  
Spectral Position ◽  
Optical Microcavity ◽  
Fabry Perot ◽  
Cavity Resonances

We present the first experimental observation that dipole-dipole interaction can be strongly enhanced by placing the system in a microcavity. We have studied the excitation energy transfer in poly(phenyl-p-phenylene vinylene) (PPPV) doped with DCM molecules, placed within a Fabry-Perot resonator. As the spectral position of the cavity resonant mode in tuned across the DCM absorption profile, the transfer efficiency from PPPV to DCM changes dramatically as revealed by photoluminescence (PL) spectra. This behavior is clear evidence for the increase of the dipole-dipole interaction strength at the cavity resonances mediated by propagating modes emitted from the excited dipoles.

High efficiency contactless energy transfer system with power electronic resonant converter

2009 ◽  
Vol 57 (4) ◽  
pp. 375-381 ◽  
Author(s):  
A. Moradewicz ◽  
M. Kazmierkowski
Keyword(s):  
Energy Transfer ◽  
High Efficiency ◽  
Laboratory Model ◽  
Resonant Circuit ◽  
Transfer System ◽  
Power Electronic ◽  
Resonant Converter ◽  
Power Transistors ◽  
Zero Current Switching ◽  
Zero Current

High efficiency contactless energy transfer system with power electronic resonant converterA novel Inductive Contactless Energy Transfer (ICET) system is presented in this paper. The energy is transferred using a rotatable air gap transformer and a power electronic converter. To minimize total losses of the system a series resonant circuit is applied, assuring zero current switching condition for IGBT power transistors. The analytical expression of the transfer dc voltage gain is given and discussed. The developed ICET system is characterized by high efficiency and fast FPGA based controller and protection system. The resonant frequency is adjusted by extreme regulator which follows instantaneous value of primary peak current. Simulated and experimental results which verify and illustrate operation of developed 3 kW laboratory model are presented.

scholarly journals Resonant Circuit Response for Contactless Energy Transfer under Variable PWM

2017 ◽  
Vol 7 (1) ◽  
pp. 41-47 ◽  
Author(s):  
A. Badawi ◽  
◽  
S. A. Kazmi ◽  
R. I. Boby ◽  
M. H. Shah ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Resonant Circuit
Sign in / Sign up

Export Citation Format

Share Document