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Electrical Technology, Vol2: Machines and Measurements, 1/e by S. P. Bali

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38

Synchronous Generators — Alternators

OBJECTIVES

In this chapter you will learn about:

  • The difference between d.c. generators and alternators
  • The physical construction of a.c. machines
  • Slot structure in a.c. dynamos
  • Coil and pole group connections
  • Stator windings
  • Pitch factor and distribution factor
  • Alternator performance at various load power factors
  • Voltage regulation of an alternator at various power factors
  • Winding resistance and synchronous impedance
  • Equivalent circuit of a synchronous alternator
  • Basic voltage generation formula
  • Requirements for parallel operation of alternators
  • How to meet these requirements
  • Different methods of synchronization

Slot structure in alternators

38.1  INTRODUCTION

Alternating current dynamos are ...

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