scholarly journals Magnetically coupled resonant wireless power transmission system that meets the Rezence efficiency and frequency specification

2021 ◽  
Author(s):  
Jean-Claude Leslie Clarke
Keyword(s):  
Design Methodology ◽  
High Efficiency ◽  
Power Transmission ◽  
Low Cost ◽  
Separation Distance ◽  
Design Flow ◽  
Original Design ◽  
Spiral Coil ◽  
Capacitive Tuning ◽  
Class E

High efficiency Class-E Power Amplifiers (PA) are difficult to analytically design using the original design equations. We present a high frequency (HF) Class-E PA design methodology that simplifies design in this thesis. A high-efficiency Class-E PA was designed using a low-cost power FET by following this design-flow. Due to their small size, it’s difficult to design efficient MCR-WPT resonators for portable electronics. We propose a novel multi-layer MCR-WPT Printed Spiral Coil (PSC) design and design methodology. Two MCR-WPT PSC resonators were designed for smartphones and tablets to meet the Rezence Self-Resonant Frequency and efficiency specifications using this novel design and design methodology. The MCR-WPT resonators power transfer efficiency is reduced when their separation distance is below the optimal Critical Coupling Distance (CCD) due to frequency splitting. We present a novel maximum-peak detection and auto-tuning circuit that automatically improves efficiency using capacitive tuning when the separation distance is below the CCD.

scholarly journals Magnetically coupled resonant wireless power transmission system that meets the Rezence efficiency and frequency specification

2021 ◽  
Author(s):  
Jean-Claude Leslie Clarke
Keyword(s):  
Design Methodology ◽  
High Efficiency ◽  
Power Transmission ◽  
Low Cost ◽  
Separation Distance ◽  
Design Flow ◽  
Original Design ◽  
Spiral Coil ◽  
Capacitive Tuning ◽  
Class E

High efficiency Class-E Power Amplifiers (PA) are difficult to analytically design using the original design equations. We present a high frequency (HF) Class-E PA design methodology that simplifies design in this thesis. A high-efficiency Class-E PA was designed using a low-cost power FET by following this design-flow. Due to their small size, it’s difficult to design efficient MCR-WPT resonators for portable electronics. We propose a novel multi-layer MCR-WPT Printed Spiral Coil (PSC) design and design methodology. Two MCR-WPT PSC resonators were designed for smartphones and tablets to meet the Rezence Self-Resonant Frequency and efficiency specifications using this novel design and design methodology. The MCR-WPT resonators power transfer efficiency is reduced when their separation distance is below the optimal Critical Coupling Distance (CCD) due to frequency splitting. We present a novel maximum-peak detection and auto-tuning circuit that automatically improves efficiency using capacitive tuning when the separation distance is below the CCD.

scholarly journals A 65nm CMOS 60 GHz Class F-E Power Amplifier for WPAN Applications

2013 ◽  
Vol 8 (1) ◽  
pp. 7-13
Author(s):  
N. Deltimple ◽  
S. Dréan ◽  
E. Kerhervé ◽  
B. Martineau ◽  
D. Belot
Keyword(s):  
Power Amplifier ◽  
High Efficiency ◽  
Low Cost ◽  
Cmos Technology ◽  
Area Network ◽  
60 Ghz ◽  
Power Stage ◽  
Lumped Elements ◽  
Class E ◽  
Class F

This work presents a two-stage 60 GHz Power Amplifier designed in a 65nm CMOS technology dedicated to low cost Wireless Personal Area Network (WPAN) applications. In order to provide a high efficiency operation, the PA is based on a Class E power stage. A Class F driver stage is also designed to provide a square waveform signal to the Class-E power stage. To realize the output networks of both driver and power stage at 60 GHz, distributed elements are used instead of lumped elements. The post-layout simulation results show a saturated output power of 15 dBm with a peak PAE of 26% at 60 GHz. It achieves a gain of 15dB at 60 GHz.

Multi-objective optimization of double suction centrifugal pump

2017 ◽  
Vol 232 (6) ◽  
pp. 1108-1117 ◽  
Author(s):  
Ran Tao ◽  
Ruofu Xiao ◽  
Di Zhu ◽  
Fujun Wang
Keyword(s):  
Centrifugal Pump ◽  
High Efficiency ◽  
Design Flow ◽  
Multi Objective Optimization ◽  
Centrifugal Pumps ◽  
Original Design ◽  
Rate Condition ◽  
Multi Objective ◽  
Numerical Studies ◽  
Critical Cavitation

Double suction centrifugal pumps are widely used for water supplying system. In this study, the original design of a double centrifugal pump lacked sufficient head at the design flow rate condition. Therefore, the most important objective was to optimize the design to improve the head. A strategy inspired by “liquid–gas cavitation process” is innovatively used for intelligent global search of better pump designs with both higher head and wider-higher efficiency. This strategy has advantages including flexibility, parallelism, and feasibility on overstepping the local-best. The computational fluid dynamics and artificial neural network are used. It helps this optimization to find unknown points in the non-linear and multi-dimensional searching space, and accelerate the optimization process. Candidates were found after search, and the best one was chosen using Pareto principle. Experimental and numerical studies verify that the optimized impeller meets the requirement of head. The efficiency is also significantly improved with higher best efficiency and wider high efficiency range than original design. The critical cavitation is also improved at design condition. This study provides an effective strategy and a good solution for multi-objective optimization of double suction centrifugal pumps. Moreover, this study provides references for the combination of optimizations with artificial intelligence especially in the pump’s design.

scholarly journals Design Methodology of the Class-E Power Amplifier with Finite Feed Inductance—A Tutorial Approach

2020 ◽  
Vol 10 (24) ◽  
pp. 8765
Author(s):  
Ingrid Casallas ◽  
Carlos-Ivan Paez-Rueda ◽  
Gabriel Perilla ◽  
Manuel Pérez ◽  
Arturo Fajardo
Keyword(s):  
Analytical Model ◽  
Power Amplifier ◽  
Design Methodology ◽  
High Efficiency ◽  
Design Procedure ◽  
Mathematical Tool ◽  
Design Procedures ◽  
Iterative Design ◽  
Amplifier Design ◽  
Class E

The Class-E with finite feed inductance is a high-efficiency power amplifier that generally uses complex, long, and iterative design procedures. In this paper, we detail a design methodology that is based on an analytical model of this amplifier. This methodology explores the power amplifier design by the use of a symbolic mathematical tool, which was developed in the software Maple™. This approach helps to understand the Class-E circuit topology and it offers a fast and easy design procedure without having to examine, in-depth, the model analytical equations.

High‐efficiency microstrip rectenna for microwave power transmission at Ka band with low cost

2016 ◽  
Vol 10 (15) ◽  
pp. 1648-1655 ◽  
Author(s):  
Huan Mei ◽  
Xuexia Yang ◽  
Bing Han ◽  
Guannan Tan
Keyword(s):  
Microwave Power ◽  
High Efficiency ◽  
Power Transmission ◽  
Low Cost ◽  
Ka Band
Sign in / Sign up

Export Citation Format

Share Document