Put the main windings in series instead of in parallel for 240. The motor starts in repulsion with induced rotor current flowing through the brushes and commutator. At transition speed. Centrifical force lifts the brushes off the commutator and drops the shorting ring onto the commutator. The motor now runs as an "ordinary" induction motor. The motor start direction is changed by sliding the brush holders. Starting torque is extreme and inrush current modest. Sometimes to prevent twisting parts off or slipping belts. The brush holders are backed off from the max torque position(s) a wee bit. An excellent motor other than the extra moving parts and less energy efficient than the newest motors.
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Today's Featured Article - A City Guy's First Tractor - by Fred Hambrecht. After living in apartments in Atlanta for more years than I care to remember, the wife and I decided to move to the country. Humming "Green Acres is the place for me..." we purchased a 29 acre tract about 60 miles south of Atlanta. Next came the house, I could talk about that ordeal for another two weeks... But, I want to talk about my tractor! We didn't even own a lawnmower, and all of a sudden we had enough grass to feed all the starving children of the bovine world. Naturally, I talked
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