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Vukosavic2013 chapter rotatingelectricalmachines

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Chapter 5 Rotating Electrical Machines This chapter provides basic information on cylindrical machine. Typical machine windings are introduced and explained, along with the basic forms of magnetic circuits with slots and teeth. This chapter introduces common notation, symbols, and conventions in representing the windings, their magnetic exes, their flux, and magnetomotive force. Typical losses and power balance charts are explained and presented for cylindrical motors and generators. Calculation of the magnetic field energy in the air gap of cylindrical machines is given at the end of this chapter, along with considerations regarding the torque per volume ratio. Electrical machines are usually rotating devices creating electromagnetic torque due to the magnetic coupling field. The machines perform electromechanical conversion of energy; thus, they are called rotational converters. The stationary part of rotating machines is called stator. The mobile part which rotates is called rotor. The rotating movement of the rotor is accessible via shaft, which serves for rotor mechanical coupling to a work machine. The magnetic coupling field creates torque which acts on the rotor forcing it to rotation. The torque is the result of interaction of electromagnetic forces, and for this reason, it is called electromagnetic torque. 5.1 Magnetic Circuit of Rotating Machines Electrical machines are mainly of cylindrical shape. Stationary part of the machine (stator) is mostly made in the ...
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