Direction Of Rotation Of The Motor; Tachometric Generator - Electrolux EWM09311 Service Manual

21.7.2.2 Direction of rotation of the motor

The direction of rotation of the motor depends on how the windings of the stator and rotor are connected to one
another. This connection is made by the circuit board relay contacts.
EC Electronic control
P Overheating cut-out (motor)
S Stator
M Rotor
T

Tachometric generator

TY Triac
K3, 4 Inversion relay
The drum rotates clockwise when spinning (seen through the door).
21.7.2.3 Tachometric generator
The speed of the collector motor, like all motors with serial excitation, depends on the load; so the speed
decreases as the load increases. This makes it necessary for the power supply voltage to the motor, and
therefore its speed, to be constantly controlled by an electronic speed control.
A tachometric generator, consisting of a magnet secured to the shaft and a coil, generates a voltage depending
on the speed of the rotor, which is sent to the electronic control.
All the electronic controls have a protection system, which is more or less sophisticated, to avoid the operation
of the motor in the event of a failure in the tachometric generator.
EC Electronic control
P Overheating cut-out (motor)
S Stator
M Rotor
T Tachometric generator
TY Triac
K3, 4 Inversion relay
Technical Support - DMM
Clockwise rotation
87/124
Anti-clockwise rotation
599 75 58-67 Rev. 04