Page 113 - Electric Drives and Electromechanical Systems

106 Electric Drives and Electromechanical Systems

F rms
I continuous ¼ ¼ 12:9A
K F

As linear motors are normally restricted to temperature rises of less than 100 C, the tem-
perature rise over ambient needs to be calculated
2

T rise ¼ I continuous R w Rt c a ¼ 50 C
nnn

3.9 Summary

This chapter has reviewed the characteristics of the main mechanical power
transmission components commonly used in the construction of a drive system,
together with their impact on the selection of the overall drive package. The chapter
concluded by discussing the approach to sizing drives. One of the key points to be noted
is that the motor-drive package must be able to supply torques and speed which ensure
that the required motion profile can be followed. To assist with the determination of the
required values, a sizing procedure was presented. It should be remembered that over-
sizing a drive is as bad as under-sizing.

Reference
Waldron, K., Kinzel, G.L., 1999. Kinematics, Dynamics, and Design of Machinery. John Wiley and Sons,
Inc., New York.