35
D.c. Motor Control
OBJECTIVES
In this chapter you will learn about:
- Motor speed control
- Control devices: hand-operated mechanical switches, face plate and drum
- Starter switches, two-point, three-point, and four-point
- Pilot control devices and their symbols
- Relay types and symbols
- Comparison of manual and automatic starters
- Reversing the direction of shunt, series, and compound motors
- Manual reverse control
- Various interlocking devices
- Retardation and stopping
- Dynamic, regenerative and electric brakes
- Jogging
- Calculation of speed and simple problems on the above issues
- Ward Leonard system
D.c. Motor control
35.1 INTRODUCTION
Any substantial-sized ...
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