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

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39

Synchronous Motors

OBJECTIVES

In this chapter you will learn about:

  • The uniqueness of synchronous speed
  • Factors controlling synchronous speed
  • Constructional features of synchronous motors
  • Amortisseur winding
  • Methods of starting synchronous motors
  • Effect of changing field excitation
  • Synchronous motors V-curves
  • Synchronous capacitors
  • Power factor correction
  • Simple problems on the above topics
equation

Synchronous motors

39.1  INTRODUCTION

The synchronous motor operates either in step or in synchronism with the frequency of the a.c. line voltage. Actual motor speed depends on the number of poles. The synchronous motor is an alternator (a.c. generator) ...

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