Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 129
mes on. A shunt motor is not suitable for such service as it does not dropin speed and so does not cause the flywheel to take the load. A series motor cannot be used because it would run away whenthe clutch of the press was released, and would probably causethe flywheel to burst. The motor… … Fig. 125.—Load curve of a punch press. Fig. 126. A drooping speed characteristic may be obtained from a shuntmotor by connecting a resistance permanently in series with thearmature as shown in Fig. 126, the resistance having such a valuethat the voltage drop er at full-load is about 5 per cent, of…
Electrical engineering
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