Page 567 - Mechanical Engineers' Handbook (Volume 2)
P. 567
Figure 11 Types of ac servomotors; (a) squirrel-case rotor; (b) solid-iron rotor; (c) drag-cup rotor.
(From J. E. Gibson and F. B. Tuteur, Control System Components, McGraw-Hill, New York, pp. 279–
280.)
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