Electric motor rotor with fitted vent spacers

摘要

A rotor having cast squirrel cage windings is provided with a number of spacers for interrupting or spacing the stacked rotor laminations, thus forming vents for cooling. The spacers surround the rotor bars, and have a projection at each side thereof for fitting into the adjacent laminations. The design of the spacers allows them to be narrower than those previously known, thus enhancing air flow through the rotor.