Back to Search Start Over

Linear Permanent Magnet Eddy Current Brake for Overwinding Protection

Authors :
Yang Panpan
Wang Penghui
Zhencai Zhu
Gongbo Zhou
He Zhenzhi
Chaoquan Tang
Source :
IEEE Access, Vol 7, Pp 33922-33931 (2019)
Publication Year :
2019
Publisher :
Institute of Electrical and Electronics Engineers (IEEE), 2019.

Abstract

Overwinding protection devices are used to brake hoisting containers before these containers reach a limited height, thereby preventing the hoisting containers from impacting the hoisting system. However, in ultra-deep shafts (depth > 1000 m), traditional overwinding protection methods fail to protect the hoisting system, because this type of hoisting system has a greater mass, kinetic energy, and inertia than the traditional hoisting system, and also the environment of ultra-deep shafts is more complex. This paper presents a novel overwinding protection method that applies a linear permanent magnet eddy current brake (LPMECB) to the hoisting system in ultra-deep shafts. This paper also finds the optimum setting parameter of permanent magnets (PMs). First, an analytical model of the LPMECB is built, and the time-domain signals of the braking force are processed via fast Fourier transform, confirming the mechanism of the optimum setting parameter. Subsequently, the simulations are conducted by establishing a finite-element model of the LPMECB; the simulations prove the existence of the optimum setting parameter of PMs and demonstrate the influence of the air gap, velocity, and conductivity on this parameter. Finally, the experimental studies are carried out on a test bench of the LPMECB to validate the analytical model and the simulation results. The results show the existence of the optimum setting parameter of PMs and prove that the air gap has an effect on this parameter.

Details

ISSN :
21693536
Volume :
7
Database :
OpenAIRE
Journal :
IEEE Access
Accession number :
edsair.doi.dedup.....98faab9a1c1a9be85d3404d74e5db837
Full Text :
https://doi.org/10.1109/access.2019.2902892