Air-cooled 1PH7 motors are rugged and low-maintenance 4-pole asynchronous motors with squirrel-cage rotors.
A fan for providing forced ventilation is mounted axially on the rear of the motor. The normal direction of air flow is from the drive end (DE) to the non-drive end (NDE) in order to keep the exhaust heat of the motor away from the machine. The reverse direction of air flow can be ordered as an option.
The motors are equipped with a built-in encoder system for sensing the motor speed and indirect position. In machine tools, the encoder system is capable of C-axis operation as standard – that is, an additional encoder is not required for C-axis operation.