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In order to improve the torque and the efficiency of longitudinal-torsional ultrasonic motor, this paper makes an analysis on friction links of stator and rotor of this type motor, and in the thesis the motor performance improvement on torque and efficiency is come down to getting the maximum friction state between stator and rotor of the motor, also the contacting process of stator and rotor is regarded...
Integrative modeling and simulation analysis of 11kW squirrel-cage asynchronous motor and vector control system have been done in the paper. Integrative model deals with the coupling effect between the motor and its control system, and analyzes system dynamic response. At the same time, the motor transient electromagnetic field performance has been acquired in the integrative simulation with slip...
Turbo generator with evaporative cooling stator and water cooling rotor possesses many excellent qualities for mid unit. The rotor bars are cooled by water inner cooling mode. The stator bars and core are immerged in evaporative coolant, which could be cooled fully. This paper presents the study of heat-transfer with different features in the turbo generator, and analyzing it by CFD. Finally, the...
Presents a modified genetic algorithm and applies the method to the optimum design of synchronous generator. The method includes adjusting the probability of crossover and mutation in the evolutionary process, second crossover, focus mutation to the special gene and emigration strategies, the method can ensure space search is effective in the entire evolutionary process, and overcome the disadvantage...
Turbo generator with evaporative cooling stator and water cooling rotor possesses many excellent qualities for mid unit. The stator bars and core are immersed in evaporative coolant, which could be cooled fully. The rotor bars are cooled by water inner cooling mode. This paper presents the study of gas-flow and heat-transfer with different features in the turbo generator, and analyzing it by CFD....
Higher power density has been an important goal in the field of power generator. Using evaporative cooling system has made a great progress in making smaller and more powerful generator. As this new technique could improve the cooling effect so that the current density of windings could be set higher and smaller cubage would not bring superheating. It is a great progress, but the slots in the stator...
The optimal design of a 2.4 MVA high temperature superconducting (HTS) generator is presented. The main features of its configuration are the adoption of the evaporative cooling stator and the magnetic flux oriented rotor. The cross section of the field winding in rotor is in circular arch shape, and the magnetic diverter shims are embedded between HTS coils. The technical and economical parameters...
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