Transcription of THEORY, CONSTRUCTION, AND OPERATION
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THEORY, CONSTRUCTION, AND OPERATION
PART ITHEORY, CONSTRUCTION, AND OPERATION1 CHAPTER 1 PRINCIPLES OF OPERATIONOF SYNCHRONOUS MACHINESThe synchronous electrical generator (also calledalternator) belongs to thefamily of electric rotating machines. Other members of the family are the direct-current (dc) motor or generator, the induction motor or generator, and a numberof derivatives of all these three. What is common to all the members of this fam-ily is that the basic physical process involved in their OPERATION is the conversionof electromagnetic energy to mechanical energy, and vice versa. Therefore, tocomprehend the physical principles governing the OPERATION of electric rotatingmachines, one has to understand some rudiments of electrical and 1 is written for those who are involved in operating, maintaining andtrouble-shooting electrical generators, and who want to acquire a better under-standing of the principles governing t
8 PRINCIPLES OF OPERATION OF SYNCHRONOUS MACHINES Voltage (e) α α E (phasor) ω Fig. 1.7 A phasor E, that can represent the voltage impressed on a circuit.The phasor is made of a vector with magnitude proportional to the magnitude of E, rotating at a constant rotational speed ω.
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