Inverter Motor Control Board - Electrolux 6 Series Service Manual

4.3 Inverter motor control board

A Inverter motor control board.
B Inverter motor.
E Main electronic circuit board.
The Inverter motor control board receives the clock pulses and power from the main circuit board. It controls
the drum rotation motor.
In the event of a fault, the motor is protected by the circuit board which detects greater current absorption
and cuts off the power supply to the motor.
Operating principle of the Inverter motor control board.
L Phase.
N Neutral.
A Inverter motor control board.
B Motor.
C Capacitor.
D Diodes.
I1-I6 Switches.
F1-F3 Motor connectors.
µP Microprocessor.
To transform the single-phase electricity (available in our homes) into three-phase electricity, a new circuit
board is used (A) to transform the energy from single-phase to three-phase, which can be modulated in
breadth and frequency respectively to adjust the power and number of revolutions of the motor.
Single-phase electricity (applied to connectors L-N) is rectified by the diode jumper (D), so there is a direct
voltage of 310 V at the ends of capacitor C, which through the combination of the opening and closing of
switches I1I6 (piloted by the processor) determines the piloting voltage and frequency of the motor.
Technical Support - A.D.L. 16/66 599 74 32-54 Rev.01