2010 dmm 60/96 599 73 68-54
11.11 Inverter
11.11.1 General characteristics
The EWM10931 electronics use a new asynchronous motor, with 2
poles, three-phase, with high performance and low noise levels.
L = Phase
N = Neutral
A = “INVERTER” board
B = Motor
C = Condenser
D = Diodes
I1 ÷ 6 = Switches
F1 ÷ 3 = Motor connectors
µP = Micro Processor
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 condenser C, which through the combination of the opening and closing of
switches I1 ÷ I6 (piloted by the µprocessor) determines the piloting voltage and frequency of the motor.
Clockwise rotation of the motor Anti-clockwise rotation of the motor
The speed of rotation of the motor is determined by the signal received from the tachometric generator (T).
During the spin phases, the microprocessor can perform, depending on the software configuration, the
anti-foam
check, where featured, and the anti-unbalancing check.
Any work on electrical appliances must only be carried out by qualified technicians.
Unplug the appliance before accessing internal components.
When replacing the “INVERTER” board, do not open the plastic casing, because
some parts are subject to high voltage values and some condensers remain
loaded for a long time at dangerous voltage levels even after being unplugged.
Accidental physical contact may cause electric shocks.
“INVERTER” operating diagram
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