Control Of The Speed Of The Motor; Direction Of Motor Rotation; Tachymetric Generator - Electrolux LAUNDRY Service Manual

5.8.2.1 Control of the speed of the motor

Speed control is obtained by using an electronic control system to vary the voltage (V) applied to the
motor.
The technique used consists of a "phase division" performed by the Triac. A Triac is a bi-directional
electronic switch. Closure of the circuit between A1 and A2 (anodes) takes place in the presence of the
appropriate signals received by the gate (G).
Start-up signals
Voltage to motor

5.8.2.2 Direction of motor rotation

The direction of rotation of the motor depends on the way in which the rotor and stator are connected
together. This connection is performed by two of the timer contacts or by the relays on the PCB.
EC Electronic control
system
P Motor overload
cut-out
S Stator
M Rotor
T Tachometric
generator
TY Triac
R1,2 Reversal relay
SOI/DT 2006-01 dmm
Clockwise rotation
44/71
Counter-clockwise rotation
599 37 47-13