On this page, http://www.allaboutcircuits.com/vol_2/chpt_13/1.html the motor family tree illustration shows permanent split capacitor, capacitor start, and capacitor run motors descending from polyphase motors, but these three types should descend from single-phase motors.

 

Welcome to AAC, and thanks for registering.

Speaking for myself, I have not a clue, so I'll less the more educated debate this (if indeed it is a debate).

 

Thanks for pointing out this error. I have updated images 02419.png and 02420.png at ibiblio.