The pull in winding is to ground and supplied from the Arm post. This keeps on keeping on for the duration. (other wise it would not pull in at the beginning) The arm voltage increases with RPM as the magnetism increases (due to the field windings tapping into the near open armature voltage, the field force almost is equal to full running current) the only thing "attached" to the arm is the pull in winding. Gotta Love it. Oldtyme Electrical compromise. Jim
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Today's Featured Article - Experimental Tractors Article - by Danny Bowes (Dsl). Tractor technology appears to have nearly hit it's pinnacle of development. If you agreed with the subtitle, you are rather mistaken. Quite, actually. As a matter of fact, some of the technology experimented with over 40 years ago makes today's tractor technology seem absolutely stale by comparison. Experimentation, from the most complex assembly to the most simple and mundane component, is as an integral a part of any farm tractor's development
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