8.11.2.1 Control of the speed of the motor ѓ Speed control is obtained by using an electronic control system to vary the voltage (V) applied to the motor. ѓ 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 8.11.2.2 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.
Clockwise rotation Counter-clockwise rotation EC Electronic control system P Motor overload cut-out S Stator R Rotor T Tachymetric generator TY Triac R1,2 Reversal relay SOI/DT 2002-05 eb 79 599 35 23-17