Results 231 to 240 of about 9,281 (261)

Study on the position identification of a Halbach array permanent magnet spherical motor

2007 IEEE International Conference on Robotics and Biomimetics (ROBIO), 2007
Halbach array permanent magnet (PM) spherical motor offers a number of attractive features. This paper described the structure, working principle and analytical equations of magnetic field of the Halbach array PM. Based on the magnetic field distribution and three-dimensional (3-D) magnetic field measurement, a position identification method was ...
Bin Li, Changliang Xia, Hongfeng Li, Ying Guan   +3 more
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Magnetic field model for direct field-feedback control of a permanent magnet spherical motor

2013 IEEE/ASME International Conference on Advanced Intelligent Mechatronics, 2013
This paper presents a forward magnetic-field model for real-time control of a permanent magnet spherical motor (PMSM). Utilizing the rotor magnetic field on a 2-dimensional (2D) domain, this model can precisely compute the magnetic fields at embedded sensors for any 3-DOF rotor orientation, providing magnetic-field references which allows for feedback ...
Kun Bai, Kok-Meng Lee
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Torque Modelling and Validation for a Spherical Motor with Stepped Permanent Magnets

Journal of Electrical Engineering & Technology, 2020
A spherical motor is an electromagnetic device with multi-degree-of-freedom motion. Three-dimensional (3-D) magnetic field analysis and torque analysis are needed for the design, optimization and control of the motor. Presently, these analyses are carried out by the finite-element method (FEM) with a large amount of calculation and time consumption. An
Jingxiong He, Guoli Li, Rui Zhou, Qunjing Wang, Yuanzhong Qiao   +4 more
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A Spherical Planning Based Electrifying Strategy of Permanent Magnet Spherical Motor

Applied Mechanics and Materials, 2015
Permanent Magnet SpherIcal Motor (PMSM) can be applIed on offshore O&M vessels for offshore wInd farms. An electrIfyIng strategy of PMSM Is proposed accordIng to the structure of PMSM wIth 3 layers of stator coIls. A statIc torque model of PMSM Is buIlt In thIs paper. In order to classIfy the statuses of rotor posItIon, spherIcal plannIng on stator
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Design of open-loop controller for permanent magnet spherical motor

2011 6th IEEE Conference on Industrial Electronics and Applications, 2011
This paper presents an open-loop control system design for a permanent magnet spherical motor (PMSM). The proposed spherical motor consists of a ball-shaped rotor with a full circle of 8 permanent magnet (PM) poles and a spherical-shell-like stator with two layers of circumferential 24 air-core coils.
Xingming Wu, Fanghong Guo, Weihai Chen, Jingmeng Liu   +3 more
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Intelligent control for permanent magnet spherical stepper motor

2008 IEEE International Conference on Automation and Logistics, 2008
This paper presents the intelligent control schemes for PM spherical stepper motor under the discrete stepping mode and continuous tracking mode. In the discrete stepping mode, a fuzzy inference system is used to predict the rotor orientation and perform the activation operation.
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Design and analysis of permanent magnetic spherical motor with cylindrical poles

2013 International Conference on Electrical Machines and Systems (ICEMS), 2013
The paper has presented a new structure of three-of-degree (3-DOF) permanent magnetic spherical motor (PMSM) including four layers of cylindrical rotor poles and two layers of coils without ferromagnetic core. The radial magnetic field influenced by magnetization direction and different structure of rotor poles are analyzed based on analytic method by ...
null Zhe Qian, null Qunjing Wang, null Guoli Li, null Xiwen Guo, null Cungang Hu, null Hui Yan   +5 more
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Design of the current controller for the permanent magnet spherical stepper motor

2009 International Conference on Electrical Machines and Systems, 2009
In view of improving control capability, a current controller of the permanent magnet spherical stepper motor was designed in this paper. Adaptive and switching control algorithms assured the rotor to drive mechanical loads following the continuous path motion and alleviating the tracking errors.
Kun Xia, Li-Xin Ma, Wen-Tao Fan, Qun-Jing Wang   +3 more
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A simplified model of inverse kinematics of permanent magnet spherical motor

2019 22nd International Conference on Electrical Machines and Systems (ICEMS), 2019
The inverse kinematics of permanent magnet spherical motor is the basis of dynamic control, motion analysis and trajectory planning. However, inverse kinematics is actually a solving problem of a set of strong coupling and nonlinear equations. The analytic solution is more complicated.
Hongfeng Li, Xu Chen, Bin Li
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Torque modeling and control algorithm of a permanent magnetic spherical motor

2009 International Conference on Electrical Machines and Systems, 2009
A new structure of three degree-of-freedom (3-DOF) spherical motor is presented. The magnetic field of the spherical motor is analyzed by equivalence current method. The torque model of the spherical motor is built according to the interaction of one permanent magnetic (PM) with one electromagnet (EM) derived by Lorentz force method (LFM).
Zhe Qian, Qunjing Wang, Lufeng Ju, Anbang Wang, Jun Liu   +4 more
openaire   +1 more source