Results 211 to 220 of about 8,053 (230)

The Conical Pendulum Driven with a LEGO® Stepper Motor

The Physics Teacher, 2018
This work describes a way to study uniform circular motion (UCM) using a LEGO® MINDSTORMS® Robotics Invention System (RIS) stepper motor with a steel ball attached to a string. The equipment is inexpensive and the resulting motion takes place on a human scale. Times and lengths can be measured with a stopwatch and a meterstick, respectively.
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Motoring performance of a conical pole-pair separated bearingless electric machine

IEEE 2011 EnergyTech, 2011
In standard motor applications, traditional mechanical bearings represent the most economical approach to rotor suspension. However, in certain high performance applications, rotor suspension without bearing contact is either required or highly beneficial.
Peter Kascak, Ralph Jansen, Timothy Dever, Aleksandr Nagorny, Kenneth Loparo   +4 more
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Heat transfer in a conical rocket motor

AIP Conference Proceedings
exaly   +2 more sources

Thermal Analysis of the Conical Rotor Motor Using LPTN With Accurate Heat Transfer Coefficients

IEEE Transactions on Applied Superconductivity, 2016
In this paper, a transient lumped parameter thermal solution combined with finite volume mode is presented. The conical rotor motor is widely used in industrial applications because of its self-locking ability, e.g., in hoisting equipment. It is also very important to investigate its thermal characteristics at design step in order to ensure safe ...
Baocheng Guo, Yunkai Huang, Youguang Guo   +2 more
exaly   +2 more sources

A Flexible Control Method of Axial Force for Conical Bearingless Switched Reluctance Motors

2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC), 2018
The 5-Degree-Of-Freedom (5-DOF) magnetic levitation technique can further increase the power density of driving systems in aircraft applications. The conical bearingless switched reluctance motor (CBSRM) can generate the axial force due to its conical rotor structure, thus it can be adopted to remove the axial magnetic bearing in the 5-DOF magnetic ...
Xin Cao, Xiaodi Li, Zhiquan Deng, Huizhen Wang, Lan Xiao   +4 more
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Single Machine Control of Axial Force for Conical Bearingless Switched Reluctance Motors

2019 22nd International Conference on Electrical Machines and Systems (ICEMS), 2019
The five Degree-of-Freedom active suspension system consisting of two conical bearingless switched reluctance motors(CBSRMs) is a novel structure. The rotor can rotate and fully suspend at the same time without magnetic bearings. This paper proposes a single machine control method of axial force for CBSRMs.
Wei Miao, Xin Cao, Xiaodi Li, Hongyan Hu
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Analysis of the Matching Between the Electric Propulsion Conical Motor in Electric Aircraft and the Propeller Based on Axial Force and Torque

IEEE Transactions on Transportation Electrification
Peixin Liang, Dian Zhang, Xiaoke Zhang   +2 more
exaly   +2 more sources

Observer-Based Asynchronous Fault Detection for Conic-Type Nonlinear Jumping Systems and its Application to Separately Excited DC Motor

IEEE Transactions on Circuits and Systems I: Regular Papers, 2020
This work investigates the observer-based asynchronous fault detection problem for a class of nonlinear Markov jumping systems. The conic-type nonlinearities hold such a restrictive condition that locates in a known hypersphere with an undefined centre.
Peng Cheng 0010, Jiancheng Wang, Shuping He, Xiaoli Luan, Fei Liu 0001   +4 more
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Analysis of non-uniform magnetic flux distribution in conical rotor double-speed induction motors

2019 16th Conference on Electrical Machines, Drives and Power Systems (ELMA), 2019
The variable geometric dimensions of the magnetic circuit in the conical rotor induction motors in axial direction makes the magnetic flux non-uniform distribution in the length of the magnetic core. An analytical multisectional method for electromagnetic calculation has been developed accounting the special features of the motor design.
George TODOROV, Dimitar JETCHEV
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Derivation of forces and force interferences in a double conical high-speed bearingless permanent magnet synchronous motor

2017 IEEE International Electric Machines and Drives Conference (IEMDC), 2017
The radial and levitation forces, necessary to suspend a double conical permanent magnet synchronous rotor, are generated by superposition of the rotor field and two stator fields with one pole pair difference. Due to the superposition of the fields in the air gap, some force interferences are disturbing the levitated drive.
Gael Messager, Andreas Binder
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