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 219
s of work to be performed by motors, eachrequiring a different relation between motor torque, andspeed. Examples of these classes are as followc: (a) When a motor is used on a crane or an elevator itmust be capable of developing a constant torque at a variablespeed, since it is desired to move a… … Fig, 168 DIEECT-CUEEENT MOTOES 209 the generator is changed, but its speed is to remain constantand hence it must be capable of developing a variable torquein order that it may carry the load. (c) In certain classes of work the motor will be requiredto develop a variable torque at a variable speed.…
Electrical engineering
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