Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 130
that an amount of power = erIa watts is lost in thecontrol resistance. CHAPTER XVIII ADJUSTABLE SPEED OPERATION OF DIRECT-CURRENT MOTORS For the driving of lathes and other such machine tools, ad-justable speed motors are largely used, it is therefore necessary todiscuss the different methods of…
Electrical engineering
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