Results 171 to 180 of about 4,033,948 (250)

Windage Loss and Torque Ripple Reduction in Stator-permanent Magnet Flux-switching Machines

2022 IEEE 5th International Electrical and Energy Conference (CIEEC), 2022
This paper designs a windage loss and torque ripple (or cogging torque) reduction rotor for stator-permanent magnet flux-switching (SPM-FS) machines. By modifying the rotor teeth shape, and the use of ribs to connect the rotor teeth.
Zhiheng Zhang, W. Hua, Wenfei Yu, Peixin Wang, Mingjin Hu, Gan Zhang   +5 more
semanticscholar   +1 more source

Windage Power Loss of High-Speed Generators

Advanced Energy Systems, 1997
Abstract Direct-drive electromachines that are designed to operate at higher rotating speeds will have a windage drag that is a more significant loss factor; this loss will require greater attention in the initial machine design. Switched-reluctance machines with poled rotors can further increase windage by fluid pumping and mixing ...
Edward B. Durkin, John J. Schauer
openaire   +1 more source

Windage loss reduction study for TFTR pulse generator

17th IEEE/NPSS Symposium Fusion Engineering (Cat. No.97CH36131), 2002
In PPPL's campaign to improve operating efficiency and reduce operating costs of our large vertical shaft motor generators proved to be a fruitful area. The measured losses in the stator air cooling loop were in the area of one megawatt. Reducing these losses was the focus of a recent study by PPPL and GE Hydro. Operating data was used to calculate the
M.N. Awad, W.J. Martin
openaire   +1 more source

Evaluation of Windage Losses for High-Speed Disc Machinery

Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 1992
Design and development of experimental apparatus is detailed for stator drag torque measurement as well as a method to evaluate rotor windage losses directly from air mass flow and temperature changes. Effects of air jets at the rotor rim were also investigated.
M R Etemad, K Pullen, C B Besant, N Baines   +3 more
openaire   +1 more source

Windage Losses in High Speed Gears—Preliminary Experimental and Theoretical Results

Journal of Mechanical Design, 2003
Power losses in high-speed gears come from the friction between the teeth (sliding and rolling), the lubrication process (dip or jet lubrication), the pumping of a gas-lubricant mixture during the meshing and the losses associated with windage effects.
Diab, Youssef, Ville, Fabrice, Changenet, Christophe, Velex, Philippe   +3 more
openaire   +2 more sources

Windage loss model and flow characteristics for curved shroud gaps in a closed sCO2 radial inflow turbine

The Physics of Fluids
A theoretical model for windage loss in curved shroud gaps under laminar flow conditions is developed by utilizing the concept of the arc differential method.
Zhuobin Zhao, Qinghua Deng, Haocheng Wang, Jun Li   +3 more
semanticscholar   +1 more source

Evaluation and Suppression of Windage Loss for High-Speed Flux-Switching Permanent Magnet Machine

IEEE transactions on industry applications
In this paper, the issue of high windage loss caused by the salient-pole rotor of a 6-stator-slot/4-rotor-pole (6/4) high-speed flux-switching permanent magnet (HS-FSPM) machine is investigated, where a variety of windage loss suppression methods are ...
Wenfei Yu, Zhongze Wu, Zhiheng Zhang, Wei Hua   +3 more
semanticscholar   +1 more source

Experimental Investigation of Windage Loss and Steady-State Temperature in Flywheel Energy Storage Systems

2025 7th International Conference on Power and Energy Technology (ICPET)
(The Flywheel Energy Storage System (FESS) has become an essential solution for grid frequency regulation due to its fast response, high power output, and low cost.
Yu Xie, Zhenqiang Yao, Zhibao Hou, Xinye Huang, Xiaohang Li   +4 more
semanticscholar   +1 more source

Research on the calculation method of windage power loss of aviation spiral bevel gear and experiment verification

Proceedings of the Institution of mechanical engineers. Part E, journal of process mechanical engineering, 2023
This paper proposes a method for calculating windage power losses of spiral bevel gears by dividing the losses into the sum of windage effects on tooth surface, toe/heel, conical surface, and circumferential surface, according to the gear structure.
Linlin Li, S. Wang
semanticscholar   +1 more source

A Windage Power Loss Model for Spur Gear Pairs

Tribology Transactions, 2010
This article proposes a simplified fluid mechanics–based model to predict the windage power loss of a spur gear pair operating under jet lubrication conditions. In this model, the total windage power loss is defined as the sum of (a) the losses associated with the interactions of individual gears with the air or air–oil mixture and (b) the losses due ...
Satya Seetharaman, Ahmet Kahraman
openaire   +1 more source