Page 41 - Electric Drives and Electromechanical Systems

Chapter 1 Electromechanical systems 33

The following motor-drive systems satisfy these criteria, and are widely used in
machine tool, robotic and other high-performance applications:
Brushed, permanent-magnet, d.c. motors with a pulse width modulated or linear
drive systems (see Chapter 5);
Brushless, d.c., permanent-magnet motors, either with trapezoidal or sinusoidal
windings (see Chapter 6);
Vector, or flux-controlled induction motors (see Chapter 7)
Stepper motors (see Chapter 8)
Except for brushed, permanent-magnet d.c. motors, all the other machines are totally
dependent on their power controller and will be treated as integrated drives. The list
above covers most widely used motors, however recent development has allowed the
introduction of other motors, ranging from the piezoelectric motor to the switched
reluctance motor; these and other motors are briefly discussed in Chapter 9.

1.7 Summary

This chapter has briefly reviewed a number of application areas where high performance
servo drives are required. It has been clearly demonstrated that the satisfactory perfor-
mance of the overall system is dependent on all the components in the motor-drive
system and its associated controllers; in particular, it is dependent on its ability to
provide the required speed and torque performance. The determination of the charac-
teristics that are required is a crucial step in the specification of such systems, and this
will be discussed in subsequent chapters.

References

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