Titlebook: Vibrations and Audible Noise in Alternating Current Machines; R. Belmans,K. J. Binns,A. Vandenput Book 1988 Kluwer Academic Publishers 198

辞职

Measurement of Induction Motor Torque Pulsations Due to Inverter Supply,ning systems. In such applications audible noise is produced by the inherent torque pulsations of such systems caused by the rectangular impressed voltages and currents. Reasonably accurate methods for the calculation of such torques are available [1],[2]. However, measurement methods have, in gener

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Determination of the No-Load Currents and the Associated Winding and Iron-Core Forces of Saturable ch smaller measure — to tangential forces which occur when the air gap flux contains harmonic fluxes with pole pairs differing by a small integer. Such higher harmonic fluxes in the air gap are practically unavoidable and inherent in the design of induction machines. These fluxes are caused by the f

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CAE-Techniques for Calculating Natural Frequencies of Machine Stators,nomic pressures, modern design trends towards the use of less active material, which may lead to noisy electrical machines. Stricter regulations (e.g. the review of ISO-standard 1996) for noise control are now being enforced. Furthermore, electrical motors are more and more introduced in formerly si

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Development of Parasitic Torques Leading to Shaft Vibrations in Induction Motors,he losses are variously attributed to many factors including the effects of slotting in rotor and stator, interbar currents arising out of cast aluminum rotor bars, and secondary effects such as those due to saturation of some regions. For large machines the efficiency is usually presumed to be decr

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Scale Aspects of Electromagnetic Noise Emission by Cage Induction Machines,n, is caused by magnetic forces on the airgap surface of the stator ferromagnetic core resulting in vibrations of its outer surface. The acoustic behaviour of these machines is rather complex due to the combined influence of:

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