Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 49
thecurrent flows through the motor fields. With the rheostat arm a in 37 28 DIRECT-CURRENT MOTORS the position shown, no current flows through the armature; but onmoving the arm to the first contact, the armature circuit is closedthrough the resistance R, which is gradually cut out as the handle… … Fig. 19. Wiring Connections of Shunt Motor. gradually without the destructive flash that would occur if the fieldcircuit were opened suddenly while the magnets are excited. Forthic rewSOi\ the field circuit should not be opened first When the armature has come nearly to rest, the rheostat armis…
Electrical engineering
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