scholarly journals Comparison of Four Resonant Topologies Based on Unified Design Procedure for Capacitive Power Transfer

2021 ◽  
Author(s):  
Takehiro Imura ◽  
Kenta Suzuki ◽  
Katsuhiro Hata ◽  
Yoichi Hori
Keyword(s):  
Design Procedure ◽  
Power Transfer ◽  
Unified Design

scholarly journals An Unified Design Procedure for Flying Machining Operations

2012 ◽  
Author(s):  
Roberto Strada ◽  
Bruno Zappa ◽  
Hermes Giberti
Keyword(s):  
Design Procedure ◽  
Point Of View ◽  
Drive System ◽  
General Validity ◽  
The Subject ◽  
Machining Operations ◽  
Selection Of ◽  
Unified Design

“Flying machining” represents synchronization of an axis (slave) with a master axis in motion. One of the most important aspects of the design of “flying machining” operation is the choice of the proper law of motion of the slave axis. In literature, technical reports and papers can be found concerning this subject, but they deal with specific problems and the solutions or suggestions proposed are specific as well, suitable for those cases. In order to try to overcome this limitation, in this paper we analyze the subject of the flying machining operations from a wider point of view. We propose a unified design procedure with general validity, suitable for the choice of the slave axis’ law of motion for whatever “flying machining” operation. Furthermore methodologies for the selection of the drive system will be proposed. The procedure is described applying it on a cross sealing operation, typical of wrapping machine.

A Wheelchair Design for the Elderly with Small Strength

2014 ◽  
Vol 590 ◽  
pp. 566-570
Author(s):  
Deng Chuan Cai
Keyword(s):  
Power Saving ◽  
Design Procedure ◽  
The Elderly ◽  
Transfer Mechanism ◽  
World Population ◽  
Concept Design ◽  
Power Transfer ◽  
Appearance Design ◽  
Control Button ◽  
Visual Element

WHO reports the world population is rapidly ageing. The number of people aged 60 years and over is expected to 2 billion. The muscle strength of the elderly was decreased the ability of movement was therefore limited. Designing a facility to facilitate assist elderly for transportation is important and required. This study aims to propose a leverage wheelchair for the elderly. A serial design procedure including concept design, mechanism design, ergonomic design, and appearance design were performed in the study to create the new product. Finally, a leverage wheelchair was then proposed with following features: (1) the appearance of the leverage wheelchair demonstrated a powerful and friendly image; (2) the power transfer mechanism is designed with a power transfer mechanism which enables user to move wheelchair with a small strength; (3) the cover of the power transfer mechanism is an protection and visual element for the wheelchair; (4) the handlebar was designed with a power-saving mechanism to facilitate the elderly to move the wheelchair. It is also designed to assist user to stand up easily, (5) the handlebar was design at a position where the user can operate easily and comfortably; (6) a control button was deigned to control wheelchair going forward or backward; (7) the push handle was designed for fitting the hand of the caregiver. The results of design works, the methods and procedure used in this study can be a reference for product design and development.

scholarly journals Design of an Intrinsically Safe Series-Series Compensation WPT System for Automotive LiDAR

Electronics ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 86 ◽  
Author(s):  
Luiz Cardoso ◽  
Vítor Monteiro ◽  
José Pinto ◽  
Miguel Nogueira ◽  
Adérito Abreu ◽  
...  
Keyword(s):  
Low Power ◽  
Design Procedure ◽  
Power Converter ◽  
Open Circuit ◽  
Secondary Coil ◽  
Primary Circuit ◽  
Power Transfer ◽  
Coupling Coefficients ◽  
Primary Coil ◽  
Resonant Condition

The earliest and simplest impedance compensation technique used in inductive wireless power transfer (WPT) design is the series-series (SS) compensation circuit, which uses capacitors in series with both primary and secondary coils of an air-gapped transformer. Despite of its simplicity at the resonant condition, this configuration exhibits a major sensitivity to variations of the load attached to the secondary, especially when higher coupling coefficients are used in the design. In the extreme situation that the secondary coil is left at open circuit, the current at the primary coil may increase above the safety limits for either the power converter driving the primary coil or the components in the primary circuit, including the coil itself. An approach often used to minimize this problem is detuning, but this also reduces the electrical efficiency of the power transfer. In low power, fixed-distance stationary WPT, a fair trade-off between efficiency and safety must be verified. This paper aims to consolidate a simple design procedure for such a SS-compensation, exemplifying its use in the prototype of a WPT system for automotive light detection and ranging (LiDAR) equipment. The guidelines herein provided should equally apply to other low power applications.

scholarly journals Efficiency optimization of a three-coil resonant energy link

2019 ◽  
Vol 6 (2) ◽  
pp. 126-137
Author(s):  
Giuseppina Monti ◽  
Maria V. De Paolis ◽  
Laura Corchia ◽  
Apostolos Georgiadis ◽  
Luciano Tarricone
Keyword(s):  
Analytical Data ◽  
Design Procedure ◽  
Optimal Solution ◽  
General Purpose ◽  
Closed Form Expression ◽  
Geometrical Parameters ◽  
Power Transfer ◽  
Time Saving ◽  
Power Transfer Efficiency ◽  
Lumped Elements

AbstractThis paper presents an effective and time saving procedure for designing a three-coil resonant inductive wireless power transfer (WPT) link. The proposed approach aims at optimizing the power transfer efficiency of the link for given constraints imposed by the specific application of interest. The WPT link is described as a two-port network with equivalent lumped elements analytically expressed as function of the geometrical parameters. This allows obtaining a closed-form expression of the efficiency that can be maximized by acting on the geometrical parameters of the link by using a general purpose optimization algorithm. The proposed design procedure allows rapidly finding the desired optimal solution while minimizing the computational efforts. Referring to the case of an application constraining the dimensions of the receiver, analytical data are validated through full-wave simulations and measurements.

scholarly journals Simulation-Assisted Design Process of a 22 kW Wireless Power Transfer System Using Three-Phase Coil Coupling for EVs

2021 ◽  
Vol 13 (21) ◽  
pp. 12257
Author(s):  
Chia-Hsuan Wu ◽  
Ching-Ming Lai ◽  
Tomokazu Mishima ◽  
Zheng-Bo Liang
Keyword(s):  
High Power ◽  
Coupling Coefficient ◽  
High Efficiency ◽  
Design Procedure ◽  
Wireless Power Transfer ◽  
Power Converter ◽  
Air Gap ◽  
Power Transfer ◽  
Wireless Power ◽  
Three Phase

The objective of this paper is to study a 22 kW high-power wireless power transfer (WPT) system for battery charging in electric vehicles (EVs). The proposed WPT system consists of a three-phase half-bridge LC–LC (i.e., primary LC/secondary LC) resonant power converter and a three-phase sandwich wound coil set (transmitter, Tx; receiver, Rx). To transfer power effectively with a 250 mm air gap, the WPT system uses three-phase, sandwich-wound Tx/Rx coils to minimize the magnetic flux leakage effect and increase the power transfer efficiency (PTE). Furthermore, the relationship of the coupling coefficient between the Tx/Rx coils is complicated, as the coupling coefficient is not only dominated by the coupling strength of the primary and secondary sides but also relates to the primary or secondary three-phase magnetic coupling effects. In order to analyze the proposed three-phase WPT system, a detailed equivalent circuit model is derived for a better understanding. To give a design reference, a novel coil design method that can achieve high conversion efficiency for a high-power WPT system was developed based on a simulation-assisted design procedure. A pair of magnetically coupled Tx and Rx coils and the circuit parameters of the three-phase half-bridge LC–LC resonant converter for a 22 kW WPT system are adjusted through PSIM and CST STUDIO SUITE™ simulation to execute the derivation of the design formulas. Finally, the system achieved a PTE of 93.47% at an 85 kHz operating frequency with a 170 mm air gap between the coils. The results verify the feasibility of a simulation-assisted design in which the developed coils can comply with a high-power and high-efficiency WPT system in addition to a size reduction.

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