HOW TRACTION MOTORS WORK

This page describes how DC traction motor cars work.
The animated display starts automatically. Click on individual diagrams to view each beginning with the Series set, then the parallel set. Click on the animation link to restart the automatic display.

Animation
Off and Series Images Number Parallel Images Number
Reverser Off 1 Parallel - 1 15
Reverse 2 Parallel - 2 16
Forward 3 Parallel - 3 17
Switching 4 Parallel - 4 18
Switching Note 5 Parallel - 5 19
Series - 1 6 Parallel - 6 20
Series - 2 7 Parallel - 7 21
Series -3 8 Parallel - 8 22
Series - 4 9 Parallel - 9 23
Series - 5 10 Parallel - 10 24
Series - 6 11 Parallel - 11 25
Series - 7 12 Parallel - 12 26
Series - 8 13
Series - 9 14

When the train operator inserts the reverse key (it looks like a small wrench) into the Master Controller a series of 32 volt system begin to control the 600 power to the motors. A 32 volt motor in each control group turned to cut out the resistance. The number of steps between full resistance and no resistance in the 600 volt circuit varied between the General Electric and Westinghouse Electric controllers. Because of this, most of the IRT barns were 100% of one manufacturer. The exception was Corona (Flushing #7), where the R-33 single cars were all WE. There the R-33s usually operated with the motors cut out when they were in GE trains. The motorman's cab windows had a G or W on the window, to show which controller was in the car.


Air Brakes

Car Lights


- -


- The JoeKorNer