Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 150
t the field coils are stillfully excited. In position 5, the brush m makes contact with fieldsegment 5 and the resistance r-i is inserted in the field coil circuit.With further motion of the drum from position 5 to position 13,the resistance in the field coil circuit is gradually increased,…
Electrical engineering
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