Noise of Polyphase Electric Motors (Hardcover)

GENERATION AND RADIATION OF NOISE IN ELECTRICAL MACHINES
Vibration, Sound, and Noise
Sound Waves
Sources of Noise in Electrical Machines
Energy Conversion Process
Noise Limits and Measurement Procedures for Electrical Machines
Deterministic and Statistical Methods of Noise Prediction
Economical Aspects
Accuracy of Noise Prediction
MAGNETIC FIELDS AND RADIAL FORCES IN POLYPHASE MOTORS FED WITH SINUSOIDAL CURRENTS
Construction of Induction Motors
Construction of Permanent Magnet Synchronous Brushless Motors
A.C. Stator Windings
Stator Winding MMF
Rotor Magnetic Field
Calculation of Air Gap Magnetic Field
Radial Forces
Other Sources of Electromagnetic Vibration and Noise
INVERTER-FED MOTORS
Generation of Higher Time Harmonics
Analysis of Radial Forces for Nonsinusoidal Currents
Higher Time Harmonic Torques in Induction Machines
Higher Time Harmonic Torques in Permanent Magnet (PM) Brushless Machines
Influence of the Switching Frequency of an Inverter
Noise Reduction of Inverter-Fed Motors
TORQUE PULSATIONS
Analytical Methods of Instantaneous Torque Calculation
Numerical Methods of Instantaneous Torque Calculation
Electromagnetic Torque Components
Sources of Torque Pulsations
Higher Harmonic Torques of Induction Motors
Cogging Torque in Permanent Magnet (PM) Brushless Motors
Torque Ripple Due to Distortion of EMF and Current Waveforms in Permanent Magnet (PM) Brushless Motors
Tangential Forces vs. Radial Forces
Minimization of Torque Ripple in PM Brushless Motors
STATOR SYSTEM VIBRATION ANALYSIS
Forced Vibration
Simplified Calculation of Natural Frequencies of the Stator System
Improved Analytical Method of Calculation of Natural Frequencies
Numerical Verification
ACOUSTIC CALCULATIONS
Sound Radiation Efficiency
Plane Radiator
Infinitely Long Cylindrical Radiator
Finite Length Cylindrical Radiator
Calculations of Sound Power Level
NOISE AND VIBRATION OF MECHANICAL AND AERODYNAMIC ORIGIN
Mechanical Noise Due to Shaft and Rotor Irregularities
Bearing Noise
Noise Due to Toothed Gear Trains
Aerodynamic Noise
Mechanical Noise Generated by the Load
ACOUSTIC AND VIBRATION INSTRUMENTATION
Measuring System and Transducers
Measurement of Sound Pressure
Acoustic Measurement Procedure
Vibration Measurements
Frequency Analyzers
Sound Power and Sound Pressure
Indirect Methods of Sound Power Measurement
Direct Method of Sound Power Measurement: Sound Intensity Technique
Standard for Testing Acoustic Performance of Rotating Electrical Machines
NUMERICAL ANALYSIS
Introduction
FEM Model for Radial Magnetic Pressure
FEM for Structural Modeling
BEM for Acoustic Radiation
Discussion
STATISTICAL ENERGY ANALYSIS
Introduction
Power Flow Between Linearly Coupled Oscillators
Coupled Multimodal Systems
Experimental SEA
Application to Electrical Motors
NOISE CONTROL
Mounting
Standard Methods of Noise Reduction
Active Noise and Vibration Control
APPENDIX A: BASICS OF ACOUSTICS
Sound Field Variables and Wave Equations
Sound Radiation from a Point Source
Decibel Levels and Their Calculations
Spectrum Analysis
APPENDIX B: PERMEANCE OF NONUNIFORM AIR GAP
Permeance Calculation
Eccentricity Effect
APPENDIX C: MAGNETIC SATURATION
APPENDIX D: BASICS OF VIBRATION
A Mass-Spring-Damper Oscillator
Lumped Parameter Systems
Continuous Systems
SYMBOLS AND ABBREVIATIONS
BIBLIOGRAPHY
INDEX