International Library of Technology · Scranton, International Textbook Co. · leaf 181
are connected to thecables d, d. The field terminals are shown at ^, e\ 3830. Cast steel is now used altogether for the fieldcastings of these motors. The use of this metal instead ofcast iron has largely reduced the weight of the motors 2556 MOTOR DESIGN. compared with the output. This metal is… … Fig. 1430. magnetic flux. The steel is also strong mechanically, and iswell able to stand the hard knocks to which a street-railwaymotor is subjected. The series coils are provided with asufficient number of turns to set up a strong field, even whenthe motor is only partially loaded. The field…
Electrical engineering
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