IEEE 10th International Conference on Industrial Informatics 2012

DOI: 10.1109/indin.2012.6301371

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Magnetic field analysis of electromagnetic spherical actuators with multiple radial poles

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Cited by 13 publications

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“…Numerical computation is employed to validate the derived analytical model. Following that, a research prototype of spherical actuator with novel 3D magnet array [31,32] is developed for experimental purpose. An automatic multi-DOF experimental apparatus is designed and fabricated to measure the magnetic flux distribution in the actuator.…”

Section: Introductionmentioning

confidence: 99%

Equivalent energized coil model for magnetic field of permanent-magnet spherical actuators

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et al. 2015

Sensors and Actuators A: Physical

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“…Numerical computation is employed to validate the derived analytical model. Following that, a research prototype of spherical actuator with novel 3D magnet array [31,32] is developed for experimental purpose. An automatic multi-DOF experimental apparatus is designed and fabricated to measure the magnetic flux distribution in the actuator.…”

Section: Introductionmentioning

confidence: 99%

Equivalent energized coil model for magnetic field of permanent-magnet spherical actuators

¹

,

²

,

³

et al. 2015

Sensors and Actuators A: Physical

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No abstract

“…However, seldom studies have been reported on tubular machines with multi-movers. Many situations in engineering application require multiple motors to drive different parts of the system, and need space saving [17,18].…”

mentioning

confidence: 99%

Magnetic field analysis of permanent magnet tubular linear machines with multiple movers

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et al. 2015

2015 IEEE International Conference on Advanced Intelligent Mechatronics (AIM)

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Conventional linear machine consists of only one stator and one mover. In this paper, a permanent magnet (PM) tubular linear motor with multiple movers is proposed to improve the efficiency of stator field. The outer and inner movers can produce independent motions by interacting with the PM stator. It can be used in large systems requiring multiple driven elements and space saving. The employment of tubular structure helps to reduce the flux leakage and improve the system working efficiency. The design concept and operating principle of the proposed linear machine are introduced. The magnetic field distribution in the machine is formulated by using Laplace's and Poisson's equations of magnetic vector potential. Following that, the modeling of force output for this machine is obtained based on Lorentz law. Numerical computation is also conducted on the flux field. It shows that the derived analytical model fits with the result of finite element analysis (FEA) well.

Magnetic field analysis of novel spherical actuators with three-dimensional pole arrays

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Review of Scientific Instruments

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Spherical actuator is an electric device that can achieve multiple degree-of-freedom rotary motions in a single joint. Permanent magnet array is a key factor that influences the output performance of electromagnetic spherical actuators. In this paper, a novel three-dimensional (3D) pole array is proposed to improve the system flux density and thus the output performance. Analysis of magnetic field distribution is extremely important for spherical actuators with 3D magnet arrays. Thus, the investigation of magnetic field is conducted in analytical, numerical, and experimental ways. The general solution of magnetic scalar potential in 3D space is formulated analytically based on Laplace's equations and spherical harmonics, and then specific solutions of the magnetic scalar potential and magnetic flux density are obtained by using boundary conditions. Numerical computation is utilized to validate the analytical model and to facilitate the observation of the magnetic field variation. A research prototype and a testing platform of magnetic field have been developed for experimental study. The testing platform can move the probe to any position around the spherical actuator and measure the flux density automatically. Experiments are conducted to obtain the flux distribution. Both numerical and experimental results validate the analytical model well.

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