**6. References**


Brownlee, J. (2011). Clever Algorithms: Nature-Inspired Programming Recipes, lulu.com; 1ST edition, ISBN-10: 1446785068.

204 Induction Motors – Modelling and Control

important than the second one.

on a desktop computer.

Houssem Rafik El-Hana Bouchekara

*Umm Al-Qura University, Makkah, Saudi Arabia* 

*Umm Al-Qura University, Makkah, Saudi Arabia* 

Mohammed Simsim and Makbul Anwari

*Mentouri University – Constantine, Constantine, Algeria* 

**Author details** 

**6. References** 

8493-0004-5.

Vol. 31, 357-379.

consideration in the optimization stage called screening. This can be achieved by neglecting the parameters with less effect. This will reduce the computing time burden and simplify the analysis of the designed motor. The second reason is that among the influent parameters themselves we can classify the parameters in function of their calculated effect. This will help the designer to have a clear picture of the importance of each parameter. For instance, if two parameters having respectively 45% and 5% of influence on a given objective function are compared; it is obvious that even if both parameters have an effect on the given objective function, the first one is greatly more

The approach developed here is universal and, although demonstrated here for induction motor design optimization, it may be applied to the design optimization of other types of electromagnetic device. It can be used also to investigate new types of motors or more generally electromagnetic devices. MATLAB code was used for implementing the entire algorithm. Thus, another valuable feature is that the developed approach is implementable

*Department of Electrical Engineering, College of Engineering and Islamic Architecture,* 

*Department of Electrical Engineering, College of Engineering and Islamic Architecture,* 

Design and Process Optimization, vol.2, no.2, pp.145-160.

Meng Joo Er (Ed.), ISBN: 978-953-307-212-8, InTech.

Altayib K., Ali, A. (2011). Improvement for alignment process of automotive assembly plant using simulation and design of experiments. International Journal of Experimental

Blanusa, B. (2010). New Trends in Efficiency Optimization of Induction Motor Drives, New Trends in Technologies: Devices, Computer, Communication and Industrial Systems,

Boldea, I. Nasar, S.A. (2002). The Induction Machine Handbook. CRC Press LLC, ISBN 0-

Bouchekara, H., Dahman, G., Nahas, M. (2011). Smart Electromagnetic Simulations: Guide Lines for Design of Experiments Technique. Progress in Electromagnetics Research B,

*Electrical Laboratory of Constantine "LEC", Department of Electrical Engineering,* 


Vogt. V. (1988). Electrical Machines. Design of Rotary Electric Machines, Fourth edition (in German), VEB Verlag Technik Berlin.

**Chapter 8** 

© 2012 Janda et al., licensee InTech. This is an open access chapter distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

© 2012 Janda et al., licensee InTech. This is a paper distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

**Noise of Induction Machines** 

Marcel Janda, Ondrej Vitek and Vitezslav Hajek

Diagnostics of electric machines is very interesting and extensive. There are many methods used to detect properties of electrical machines. Between diagnostic methods include too the

Itself the noise of electric machines is byproduct of the machine operation. The generation of

Noise of electrical machinery is generated by the vibration of machine parts. Gradual spread of vibration from the engine to the surroundings causes pulses of air with certain frequencies. This creates a sound wave generator, which can be within a certain frequency

The main sources of noise in electrical machines are time change of the electromagnetic fields, noise of bearings and other mechanical sources. Finally, the unwanted noise is creating too due to coolant flow or parts that come into contact with coolant in electric machines. Level of noise sources in electrical machines depends on the structural

A major problem in measurement noise is interference environment. For a perfect suppression ambient noise is necessary to have a specialized laboratory. It should be also measured machine have isolated from vibration, which it may be transferred from storage.

The sound wave is generated by vibrating objects and can be defined as mechanical interference with the finite speed of advancing through the media. These waves have small amplitude, adiabatic oscillation are characterized by a wave speed, wavelength, frequency and amplitude. Sound has the character of longitudinal sound waves in the direction of propagation in the environment. In other words, it is the movement of individual particles

measurement and analyze of noise, which generates electrical machines.

Additional information is available at the end of the chapter

noise is involved in many physical principles.

arrangement and the accuracy of engine design.

http://dx.doi.org/10.5772/38152

range, audible to humans.

**2. Basic concepts of noise** 

**1. Introduction** 
