Dynamic Characteristics of Levitated YBCO Bulk Running Above the Permanent Magnet Guideway With Fluctuating Magnetic Field

2020 ◽  
Vol 30 (6) ◽  
pp. 1-8
Author(s):  
Dongyang Lin ◽  
Lifeng Zhao ◽  
Dajin Zhou ◽  
Cuihua Cheng ◽  
Yong Zhang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Dynamic Characteristics ◽  
Permanent Magnet Guideway ◽  
Ybco Bulk

Design and Simulation Analysis of HTS Wind Generator

2013 ◽  
Vol 312 ◽  
pp. 138-142 ◽  
Author(s):  
Peng Cheng ◽  
Geng Wang ◽  
Peng Qin ◽  
Feng Yan Li
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
Permanent Magnet ◽  
Field Distribution ◽  
High Temperature Superconductor ◽  
Simulation Analysis ◽  
Theoretical Research ◽  
Ybco Bulk ◽  
Wind Generator ◽  
The World

With the development of high temperature superconductor (HTS) material, countries all over the world have shown great attention in HTS generator over the theoretical research and application. In this paper, a 3MW high temperature superconductor wind generator has been designed by using the RM and Maxwell 2D module of FEM software Ansoft. This design use the second generation HTS material YBCO bulk to be the permanent magnet. It break through the capability limitation of the traditional permanent magnet generation. Based on the FEM simulating, calculating and changing the parameter, the data of the HTS wind generator has been shown, such as magnet line of force, magnetic-field distribution and so on. Compared with the traditional permanent magnet generation, the HTS wind generator has a strong superiority in various aspects.

scholarly journals Dynamic characteristics of a bitable linear actuator with moving permanent magnet

2004 ◽  
Vol 1 (2) ◽  
pp. 207-214 ◽  
Author(s):  
Ivan Yatchev ◽  
Krastio Hinov ◽  
Vultchan Gueorgiev
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Dynamic Characteristics ◽  
Electromagnetic Force ◽  
Electrical Circuit ◽  
Field Analysis ◽  
Linear Actuator ◽  
Grid Data ◽  
Magnetic Field Analysis ◽  
The Magnetic Field

The dynamic characteristics of an ax symmetrical linear actuator with axially magnetized moving permanent magnet are obtained using combined field and circuit approach. The magnetic field of the actuator has been analyzed using the finite element method over a current-displacement sampling grid. Two field analyses are carried out for each point of the grid - one for the real system and one for the system where the permanent magnet is considered as a soft magnetic body. For each point of the grid, data for the total flux linkage, electromagnetic force and the coil inductance are extracted from the magnetic field analysis. These data are approximated by bicubic spline functions, which are employed in the solution of the system of ordinary differential equations of the electrical circuit and the mechanical motion. Results are obtained for the time variations of the coil current, mover displacement, mover velocity and electromagnetic force. The results for the current and displacement are verified experimentally.

Levitation Performance of Multiple YBaCuO Blocks with Different Arrays above a Permanent Magnet Guideway

2014 ◽  
Vol 787 ◽  
pp. 431-435 ◽  
Author(s):  
Da Bo He ◽  
Jun Zheng ◽  
Yan Feng Gou ◽  
Rui Xue Sun ◽  
Tong Che ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Levitation Force ◽  
High Temperature Superconductors ◽  
Utilization Rate ◽  
Permanent Magnet Guideway ◽  
Array Pattern ◽  
Maglev Vehicle ◽  
Levitation Performance ◽  
And Performance

Bulk high temperature superconductors are usually used as arrays due to the limited size and performance of a single bulk. To find a reasonable array pattern for the superconducting maglev vehicle, we studied the levitation force of four multi-seeded rectangular YBaCuO blocks with three possible arrays above a permanent magnet guideway (PMG). Experimental results show that the levitation force can be improved through an optimal array pattern of the bulk superconductor. The method is to avoid the joint gaps of bulk arrays in a strong magnetic field area of the PMG thus improving the utilization rate of the applied magnetic field. The optimal array pattern will be helpful to improve the levitation performance and reduce the quantity of onboard superconductors.

A novel analytical calculation of magnetic field in the slotted air gap of spoke-type permanent-magnet machines using conformal mapping

2020 ◽  
pp. 1-15
Author(s):  
Jianqi Li ◽  
Yu Zhou ◽  
Jianying Li
Keyword(s):  
Magnetic Field ◽  
Conformal Mapping ◽  
Permanent Magnet ◽  
Flux Density ◽  
Analytical Method ◽  
Electromotive Force ◽  
Analytical Calculation ◽  
Air Gap ◽  
Permanent Magnet Machines ◽  
Peak Value

This paper presented a novel analytical method for calculating magnetic field in the slotted air gap of spoke-type permanent-magnet machines using conformal mapping. Firstly, flux density without slots and complex relative air-gap permeance of slotted air gap are derived from conformal transformation separately. Secondly, they are combined in order to obtain normalized flux density taking account into the slots effect. The finite element (FE) results confirmed the validity of the analytical method for predicting magnetic field and back electromotive force (BEMF) in the slotted air gap of spoke-type permanent-magnet machines. In comparison with FE result, the analytical solution yields higher peak value of cogging torque.

Study of Reactance Evaluation Methods in Saturated Magnetic Field for Permanent Magnet Synchronous Motor

2006 ◽  
Vol 126 (12) ◽  
pp. 1722-1729 ◽  
Author(s):  
Akeshi Takahashi ◽  
Haruo Koharagi ◽  
Satoshi Kikuchi ◽  
Kazumasa Ide ◽  
Kazuo Shima
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Permanent Magnet Synchronous Motor ◽  
Synchronous Motor ◽  
Evaluation Methods
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