scholarly journals Development of high-harmonic gyrotrons using a permanent magnet system

2004 ◽  
Vol 149 (4) ◽  
pp. 1-6
Author(s):  
Toshitaka Idehara ◽  
Isamu Ogawa ◽  
Ken Ohashi ◽  
Yosuke Iwata
Keyword(s):  
Permanent Magnet ◽  
High Harmonic ◽  
Magnet System

Design of a High-Harmonic Gyrotron With a Permanent Magnet System

2013 ◽  
Vol 60 (10) ◽  
pp. 3570-3575 ◽  
Author(s):  
Shou Xi Xu ◽  
Pu Kun Liu ◽  
G. F. Liu ◽  
Z. H. Geng ◽  
Chao Hai Du ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
High Harmonic ◽  
Magnet System ◽  
Harmonic Gyrotron

scholarly journals Development of High Harmonic Gyrotrons Using a Permanent Magnet System

2003 ◽  
Vol 123 (10) ◽  
pp. 989-994 ◽  
Author(s):  
Toshitaka Idehara ◽  
Isamu Ogawa ◽  
Ken Ohashi ◽  
Yosuke Iwata
Keyword(s):  
Permanent Magnet ◽  
High Harmonic ◽  
Magnet System

Analysis of structure factors affecting suspension force of permanent magnet system with variable magnetic flux path control

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1495-1504
Author(s):  
Fangchao Xu ◽  
Yongquan Guo ◽  
Ran Zhou ◽  
Junjie Jin ◽  
Chuan Zhao ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
Permanent Magnet ◽  
System Structure ◽  
Magnet System ◽  
Load Torque ◽  
Factors Affecting ◽  
Annular Gap ◽  
Path Control ◽  
Structure Factors ◽  
Flux Path

To solve the problem of reduction of suspension force of permanent magnet system with variable magnetic flux path control, according to the structure of the system, suspension principle of the permanent magnet system with variable magnetic flux path control and the generation principle of the load torque, the influence of the mechanical structure of the system on the suspension force is analyzed by changing part of parameters of the system structure. The results show that the existence of magnetic isolation plate is the main reason for the decrease of suspension force, the permanent magnet ring can be thickened to 11.91 mm, the annular gap can be reduced to 1 mm, thickness of the “F” shaped magnetizer can be increased to 9 mm to increase the suspension force.

scholarly journals A High Harmonic Gyrotron With an Axis-Encircling Electron Beam and a Permanent Magnet

2004 ◽  
Vol 32 (3) ◽  
pp. 903-909 ◽  
Author(s):  
T. Idehara ◽  
I. Ogawa ◽  
S. Mitsudo ◽  
Y. Iwata ◽  
S. Watanabe ◽  
...  
Keyword(s):  
Electron Beam ◽  
Permanent Magnet ◽  
High Harmonic ◽  
Harmonic Gyrotron

Theoretical study and optimization design of high-power optical isolator permanent magnet system

2015 ◽  
Vol 27 (1) ◽  
pp. 11001
Author(s):  
胡姝玲 Hu Shuling ◽  
赵东伟 Zhao Dongwei ◽  
王欢欢 Wang Huanhuan ◽  
肖泽宇 Xiao Zeyu ◽  
牛燕雄 Niu Yanxiong
Keyword(s):  
Permanent Magnet ◽  
High Power ◽  
Optimization Design ◽  
Theoretical Study ◽  
Magnet System ◽  
Optical Isolator

Permanent Magnet System for PET Cyclotron

2008 ◽  
Vol 18 (2) ◽  
pp. 965-968 ◽  
Author(s):  
E. Antokhin ◽  
M. Kumada ◽  
Y. Iwashita ◽  
S. Wakasa ◽  
S. Matsumoto ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Magnet System

scholarly journals Force Characteristics Analysis for Linear Machine with DC Field Excitations

2018 ◽  
Vol 152 ◽  
pp. 03005
Author(s):  
Preshant A/L Krishna ◽  
Aravind CV ◽  
Aminath Saadha ◽  
F. Azhar
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnets ◽  
Magnetic Levitation ◽  
Transport Sector ◽  
Magnet System ◽  
Element Analysis ◽  
Average Force ◽  
Railway Systems ◽  
Characteristics Analysis ◽  
Electro Magnetic

In urban regions and particularly in developing countries such as Malaysia with its ever-growing transport sector, there is the need for energy efficient systems. In urban railway systems there is a requirement of frequent braking and start/stop motion, and energy is lost during these processes. To improve the issues of the conventional braking systems, particularly in Japan, they have introduced linear induction motor techniques. The drawbacks of this method, however, is the use of permanent magnets, which not only increase the weight of the entire system but also increases magnetic cogging. Hence an alternative is required which uses the same principles as Magnetic-Levitation but using a magnet-less system. Therefore, the objective of this research is to propose an electromagnetic rail brake system and to analyze the effect of replacing permanent magnets with a magnet-less braking systems to produce a significant amount of brake thrust as compared with the permanent magnet system. The modeling and performance analysis of the model is done using Finite Element Analysis (FEA). The mechanical aspects of the model are designed on Solidworks and then imported to JMAG Software to proceed with the electro-magnetic analysis of the model. There are 3 models developed: Base Model (steel), Permanent Magnet (PM) Model and DC Coil Model. The performance of the proposed 2D models developed is evaluated in terms of average force produced and motor constant square density. By comparing the values for the 3 models for the same case of 9A current supplied for a 0.1mm/s moving velocity, the base model, permanent magnet model and DC coil model produced an average force of 7.78 N, 7.55 N, and 8.34 N respectively, however, with increase in DC current supplied to the DC coil model, the average force produced is increased to 13.32 N. Thus, the advantage of the DC coil (magnet-less) model, is, that the force produced can be controlled by varying the number of turns in the coil (N) or the current supply to the coil (I) given by the which is the simple principles of a solenoid: Force(mmf)=NI.

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