International Library of Technology · Scranton, International Textbook Co. · leaf 163
whereas in this case the current is keptconstant and the torque remains the same. It is thus seenthat the speed of a series motor operated in this way wouldvary widely with the load, and such a motor without someregulating device would be unsuitable for operating machin-ery. In order to make such… … Fig. 1419. of the field winding in and out in such a way as to main-tain a nearly constant speed. Fig. 1419 shows a motorintended for operation on a constant-current circuit. In MOTOR DESIGN. 2539 this case the centrifugal governor on the end of the shaftoperates a switch which alters the effective…
Electrical engineering
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