9.9
Three-phase asynchronous motor
11. Tachometric generator
20. PCB
23. Inverter
24. Motor
X-Y-X = Motor windings
9.9.1
Power supply to motor
Three-phase power is fed by the inverter (4) which sends, through the connectors 5-6-7, the three phases to
connectors 1-2-3 on the motor (nodes V-W-U), where the windings (Y-X-Z-) are connected. The phase shift
between the phases is 120° and peak amplitude is 310V.
The condition of the motor can be determined by
measuring the resistance of the windings:
∼
Winding y ohm 5,4
±7% (contacts 2-3)
∼
Winding x ohm 5,4
±7% (contacts 1-2)
∼
Winding z ohm 5,4
±7% (contacts 1-3)
Winding T (tachometric) ohm 121
The electrical components must be serviced by qualified personnel only.
Unplug the appliance before accessing internal components.
SOI/DT 2007-10 dmm
∼
±7% (contacts 4-5)
36/48
599 70 27-90