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
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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