Vibrations and Audible Noise in Alternating Current Machines

Front Matter....Pages i-ix
Introductory Lecture....Pages 1-6
Dynamic Behaviour and Oscillating Problems in Synchronous Generators with a Superconducting Field-Winding....Pages 7-25
Some Methods for the Reduction of Electromagnetically Excited Vibrations and Noise in Induction Machines Due to the Slot Openings....Pages 27-34
Torsional Vibration in the Rotor of a Superconducting Turbogenerator....Pages 35-57
Torsional Vibrations of Superconducting Generators....Pages 59-79
Electromagnetic Influence on the Radial Vibrations of Two-Pole Induction Motors....Pages 81-97
Design of Foundations for Alternating Current Machines with Respect to the Dynamic Effects: Experimental and Mathematical Analyses....Pages 99-112
The Active Magnetic Bearing Enables Optimum Control of Machine Vibrations....Pages 113-135
Analysis of Effect Damper Circuit Modelling and the Fault Clearing Process has on Amplitude and Decay of Torsional Vibrations in Turbine-Generator Shafts Following Severe Disturbances on the Grid Supply....Pages 137-168
Transients of Induction Machines in Driving Systems....Pages 169-190
Measurement of Induction Motor Torque Pulsations Due to Inverter Supply....Pages 191-211
Determination of the No-Load Currents and the Associated Winding and Iron-Core Forces of Saturable Induction Machines for Sinusoidal and Nonsinusoidal Terminal Voltages....Pages 213-250
General Torsional Fatigue of Turbogroup Shafts Due to Electrical Disturbances....Pages 251-286
General Torsional Fatigue of Turbogroup Shafts Due to Electrical Disturbances....Pages 287-313
Estimation and Measurement of Torque Vibrations in Synchronous Machines....Pages 315-329
CAE-Techniques for Calculating Natural Frequencies of Machine Stators....Pages 331-345
Development of Parasitic Torques Leading to Shaft Vibrations in Induction Motors....Pages 347-361
Scale Aspects of Electromagnetic Noise Emission by Cage Induction Machines....Pages 363-367
Results of Computer Simulation of Subsynchronous Resonance of Synchronous Generators....Pages 369-387
Mechanical and Electromagnetic Vibrations in Salient Poles Hydrogenerators....Pages 389-409
How to Avoid Torque Vibrations at Low Speed in Inverter Fed Machines....Pages 411-424
Measurements of Vibrations for Electrical Machines....Pages 425-446
A Test Rig for Measurement of Vibrations of Electrical Rotating Machines....Pages 447-455
Effects of Voltage/Current Harmonics on Noise Emission from Induction Motors....Pages 457-468
About the Multiples of Netfrequency in the Noise of Small Asynchronous Machines....Pages 469-483
Effects of Rotor Cage Asymmetry on the Performance of Three-Phase Induction Motors....Pages 485-498
Vibration Behaviour of Stators of Electrical Machines....Pages 499-513
The Electro-Mechanical Torsional Vibration Behaviour of A.C. Machines and Drives....Pages 515-544
On-Line Diagnostics of Large Induction Motors....Pages 545-564