Engineering Book from C.H.I.P.S.

Noise of Polyphase Electric Motors
by Jacek F. Gieras

Noise of Polyphase Electric Motors gathers the fundamental concepts along with all of the analytical, numerical, and statistical methods into a unified reference.


  • Provides the most up-to-date and comprehensive treatment of issues related to noise and vibration in electric motors
  • Covers analytical, numerical, and statistical methods for noise prediction and analysis, providing concrete examples for each
  • Examines vibration and sound radiation of cylindrical shells and the valid conditions of analytical equations
  • Presents the fundamental equations for electromagnetic, structural, and acoustic computation of noise and vibration
  • Explores SEA principles and applications to electric motors in detail


Generation and Radiation of Noise 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

  • FEM Model for Radial Magnetic Pressure
  • FEM for Structural Modeling
  • BEM for Acoustic Radiation

Statistical Energy Analysis

  • 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


click here to see books • videos • cd-roms of related interest


Noise of Polyphase Electric Motors
by Jacek F. Gieras
2005 • 392 pages • $172.95 + shipping
Texas residents please add 6.75 % sales tax

Go to Top of Page

copyright © 1997-2011 Culinary and Hospitality Industry Publications Services