Magnetic Clutch - Kubota KX080-3 Workshop Manual

WSM KX080-3 Mechanism
c. Magnetic clutch
A magnetic clutch is used to connect and
disconnect the compressor from the engine.
The main components are the stator, rotor,
and pressure plate.
(1) Principle
When the current is supplied to the coil,
magnetic forces are generated in the iron II
and attracts the iron I.

(2) Magnetic Clutch

A magnetic clutch is used to engage and
disengage the compressor from the engine.
Main components are stator (6) and rotor
with pulley (5), and pressure plate (1) to
engage the drive pulley (4) and compressor
magnetically.
The stator is fixed on the compressor hous-
ing, and pressure plate is attached to the
compressor shaft.
Two ball bearings are used between the
inner surface of the rotor and the front hous-
ing of the compressor.
(1) Pressure Plate
(2) Ball Bearing
(3) Snap Ring
(4) Pulley
(5) Rotor with Pulley
(6) Stator
(7) Snap Ring
(3) Operation
Whenever the engine is operating, the pulley
is rotating since it is connected to the crank-
shaft by a drive belt, but the compressor
does not operate until the magnetic clutch is
energized. When the air conditioning system
is switched on, the system supplies current
to the stator coil. Then the electromagnetic
field attracts the pressure plate and pulls the
plate against the friction facings on the pul-
ley. The friction between the facings on the
pulley and pressure plate causes the mag-
netic clutch assembly to rotate as a unit, and
drive the compressor.
Fig. Magnetic Attractive Force
Fig. Operation
VI-M-14
VI Air Conditioner