The Design of Small H-Style Permanent Magnet Used for NMR

This paper introduces the design of permanent magnet that can been used to small nuclear magnetic resonance (NMR) system, and its static magnetic field simulation analysis uses Ansoft's Maxwell software. According to the theory of magnetic circuit design and the performance requirements of magnetic field, An H-style permanent magnetic actuator has been designed, and it can generate uniform magnetic field larger than 0.4 T in the interested region of this actuator. The static magnetic field simulation analysis of this permanent magnetic actuator has done by Ansoft's Maxwell 3D software, and the experimental results show that the design of permanent magnet can meet the requirements.

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Analysis and optimisation of an axial flux permanent magnet coreless motor based on the field model using the superposition principle and genetic algorithm

Archives of Electrical Engineering ◽

10.1515/aee-2016-0043 ◽

2016 ◽

Vol 65 (3) ◽

pp. 601-611 ◽

Cited By ~ 6

Author(s):

Rafał M. Wojciechowski

Keyword(s):

Magnetic Field ◽

Permanent Magnet ◽

Field Model ◽

Superposition Principle ◽

Electromagnetic Torque ◽

Axial Flux ◽

Magnetic Field Simulation ◽

Field Distributions ◽

Field Simulation ◽

The Magnetic Field

Abstract In the paper, methodologies for the magnetic field simulation in an axial flux permanent magnet coreless (AFPMC) motor have been proposed and discussed. Two approaches have been considered and investigated, both based on representing the 3D field distribution by superimposing axisymmetric 2D patterns. The first of studied approaches applies directly to the Biot-Savart law while the second uses a 2D axisymmetric finite element method. The selected results of magnetic field distributions and electromagnetic torque characteristics for the considered AFPMC motor have been presented and compared with results obtained using the commercial FEM package ‘Maxwell’. The elaborated algorithms have been incorporated into the design routines allowing multi-parameter optimisation of the considered motor construction.

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Magnetic Field Simulation Analysis of New Type Coil-type Axial Magnetic

2020 IEEE International Conference on Advances in Electrical Engineering and Computer Applications( AEECA) ◽

10.1109/aeeca49918.2020.9213529 ◽

2020 ◽

Author(s):

Li Xiaozhao ◽

Zhang Yang ◽

Wang Yuhao ◽

Ji Lei ◽

Wang Zhengqi

Keyword(s):

Magnetic Field ◽

Simulation Analysis ◽

Magnetic Field Simulation ◽

Field Simulation ◽

New Type

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Research on Magnetic Field Simulation of Cylindrical Linear Synchronous Motor

E3S Web of Conferences ◽

10.1051/e3sconf/202125202060 ◽

2021 ◽

Vol 252 ◽

pp. 02060

Author(s):

Jiang Minzheng ◽

Zhang Deshi ◽

Dong Kangxing ◽

Wang Hui

Keyword(s):

Magnetic Field ◽

Permanent Magnet ◽

Synchronous Motor ◽

Linear Motor ◽

Transient Simulation ◽

Gap Size ◽

Magnetic Field Simulation ◽

Field Simulation ◽

Linear Synchronous Motor ◽

Voltage Frequency

In order to obtain the influence of different structures and frequencies on the thrust of cylindrical permanent magnet linear synchronous motor, the transient simulation of magnetic field of cylindrical permanent magnet linear synchronous motor is carried out by using Ansoft software, and the correctness of the simulation is verified by experiments. Through simulation, the characteristics of the linear motor under different voltage frequency, air gap size, and permanent magnet width and its influence on the linear motor thrust are obtained.

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A reciprocating permanent magnetic actuator for driving magnetic micro robots in fluids

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/09544062211014547 ◽

2021 ◽

pp. 095440622110145

Author(s):

Chuan Qu ◽

Yong-Chen Pei ◽

Qing-Yuan Xin ◽

Zhen-Xing Li ◽

Long Xu

Keyword(s):

Permanent Magnet ◽

Analytical Calculation ◽

Magnetic Actuator ◽

Cross Sectional ◽

Permanent Magnetic Actuator ◽

Element Simulation ◽

Micro Robot ◽

Analytical Formulas ◽

Motion Performance ◽

Motion Characteristics

Magnetic-based driving applications are receiving increasing attention. This study proposed a novel reciprocating permanent magnetic actuator (PMA) to manipulate magnetic micro robots to impact and clear blockages inside fluid pipes in a linear path. The PMA consisted of a cylindrical permanent magnet and a crank slider structure. A straight pipe with a circular cross-sectional area was located in front of the actuator to study the driving performance of PMA. A micro permanent magnet with a cylinder shape was employed as a working robot for manipulation inside the pipe. Firstly, analytical formulas were derived to obtain the magnetic driving force acting on the micro robot and determine the most suitable magnet configuration. The finite element simulation verified the analytical calculation. The developed reciprocating PMA prototype was then introduced, and the PMA and micro robot’s motion performance was analysed. Lastly, preliminary experiments were carried out for evaluating the micro robot’s motion characteristics. Performance tests for different excitation frequencies, flow rates, viscosities, and axial distances, indicating that PMA could manipulate the magnetic micro robot inside the pipe. The results confirmed that the developed PMA could effectively drive the micro robot with the advantage of consecutive magnetic driving. Especially, the micro robot featured good flexibility, rapid response, and a simple structure, suggesting that this micro robot may play an important role in industrial and medical applications, such as blockage elimination and thrombus clearance.

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