TM 5-4310-385-13
e.
Compressed air in the high pressure cylinder enters through intake valve assembly (7) and exits (at high
pressure) through the exhaust valve assembly (8) to the aftercooler (9).
f.
The aftercooler tubing (9) is looped around the back of the compressor to allow air cooling from flywheel fan
blades. Air passes from the aftercooler through a check valve to the air tank.
1-15. OPERATION OF THE ELECTRIC MOTOR.
a.
The electric motor is a three phase induction motor. The operation of a three phase induction motor depends on
two basic parts, the stator or stationary windings and the rotor.
b.
The rotor does not have windings, but has metal bars pressed into its frame which act as conductors of electrical
current. The rotor does not have any external connections.
c.
208 VAC is connected across T1, T2, T3, which causes current to flow in the stator windings and produce a
rotating magnetic field.
d.
This magnetic field cuts across the conductors in the rotor, inducing currents in the conductors. This causes a
repelling force between the conductors and the magnetic field and causes the rotor to turn.
Electric Motor Schematic
1-8
