Results 341 to 350 of about 1,737,791 (396)
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The rotor bearings of electricity meters
Journal of the Institution of Electrical Engineers, 1929In this paper an accumulation of experimental and statistical data which have been obtained by the author has been brought under review for the purpose of discussing the leading problem in the sphere of meter maintenance, namely that of worn bearings.Attention is drawn to the necessity for improving the reliability of meters in service in consequence ...
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Design, Prototyping, and Testing of a Dual-Rotor Motor for Electric Vehicle Application
IEEE transactions on industrial electronics (1982. Print), 2018Permanent magnet motors and induction motors are used in many electric vehicles (EVs) and synchronous reluctance motors have been used in some experimental EVs. However, none of them meet all the objectives of high efficiency, high power density, and low
Ankit Dalal, Praveen Kumar
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Electric generator using a triangular diamagnetic levitating rotor system
Review of Scientific Instruments, 2009This paper describes a feasibility study of creating a small low friction and low maintenance generator using a diamagnetically stabilized levitating rotor. The planar rotor described in this paper uses a triangular configuration of magnets that generates emf by passing over coils placed below the rotor.
Joe Nhut, Ho, Wei-Chih, Wang
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Handling Qualities Based Assessment of Scalability for Variable-RPM Electric Multi-Rotor Aircraft
Proceedings of the Vertical Flight Society 75th Annual Forum, 2019An examination is conducted into the effects of increasing rotor diameter on the handling qualities of a quadcopter with fixed-pitch, variable-RPM rotors. Five aircraft are simulated, with rotors ranging from 1 to 8 feet in diameter.
Ariel Walter +4 more
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International Electric Machines and Drives Conference, 2019
This paper presents design and performance analysis of a novel rare-earth-free dual mechanical port machine for hybrid electric vehicle drives. A new rotor structure was proposed to enhance the reluctance torque contribution.
Zhiwei Zhang
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This paper presents design and performance analysis of a novel rare-earth-free dual mechanical port machine for hybrid electric vehicle drives. A new rotor structure was proposed to enhance the reluctance torque contribution.
Zhiwei Zhang
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Finite-Element Analysis for a Rolling-Rotor Electrical Machine
IEEE Transactions on Magnetics, 2010A method for finite-element analysis of a rolling-rotor electrical machine was developed. The conventional moving-band technique for modeling motion was replaced by an element structure of radial bands in the air gap. This finite-element scheme allows a large distortion of the elements at the contact point of stator and rotor without suffering of ...
Biernat, Adam +7 more
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2009 IEEE Power & Energy Society General Meeting, 2009
In this paper, decoupled control of rotor torque and rotor electric power in a reluctance wound rotor brushless doubly fed machine, (BDFM), is presented. The machine stator windings are fed from two separate voltage source inverters. The proposed control technique is applied to the inverters such that the BDFM is capable of producing mechanical torque ...
A. S. Abdel-Khalik +4 more
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In this paper, decoupled control of rotor torque and rotor electric power in a reluctance wound rotor brushless doubly fed machine, (BDFM), is presented. The machine stator windings are fed from two separate voltage source inverters. The proposed control technique is applied to the inverters such that the BDFM is capable of producing mechanical torque ...
A. S. Abdel-Khalik +4 more
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8th IET International Conference on Power Electronics, Machines and Drives (PEMD 2016), 2016
This paper investigates the torque and vibration signal spectra of wound rotor induction machines when subjected to different levels of rotor electrical unbalance. A harmonic machine model numerical study is first performed to identify the electromagnetic torque signal spectral components related to operation without or with electrical unbalance.
D.S. Vilchis-Rodriguez +5 more
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This paper investigates the torque and vibration signal spectra of wound rotor induction machines when subjected to different levels of rotor electrical unbalance. A harmonic machine model numerical study is first performed to identify the electromagnetic torque signal spectral components related to operation without or with electrical unbalance.
D.S. Vilchis-Rodriguez +5 more
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Rotor Surface Ferrite Permanent Magnets in Electrical Machines: Advantages and Limitations
IEEE Transactions on Industrial Electronics, 2017Permanent-magnet synchronous machines (PMSM) are gaining a foothold in a growing number of applications. However, the high cost of these machines compared with the prices of induction motors, whose production process is mature and material costs are low, limits the use of PMSMs with rare-earth permanent magnets in many potential cases.
Petrov, Ilya +4 more
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Dual Mechanical Port Machine with Interior PM Outer-Rotor for Hybrid Electric Vehicles
IEEE Transportation Electrification Conference and Expo, 2019The dual mechanical port machine is a special machine which has dual output to connect engine and wheel in hybrid electric vehicles. This paper presents a new dual mechanical port machine for hybrid electric vehicle drives. An interior PM rotor structure
Zhiwei Zhang
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