Practical applied electricity; a book in plain English, for the practical man. Theory, practical applications and examples (1911)
Moreton, David Penn, 1882- · Chicago, The Reilly & Britton co · leaf 212
ng the Speed of a Motor.—Thespeed of a motor may be regulated by any one, or certaincombinations of the following methods: (a) Change in field strength produced by a change in field current. (b) Change in field strength produced by a change in the reluctance of the magnetic circuit. (c) Varying… … R ShuntField Fig. 161 motor, as shown in Fig. 161, may be used to change its speed.If the resistance of the shunt-field circuit be increased byincreasing the part of the resistance (R) in circuit, the fieldcurrent will be decreased and there will be a decrease in themagnetic flux ($) per pole…
Electrical engineering
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