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21.7.4 Three-phase asynchronous motor - inverter
21.7.4.1 General characteristics
1. Main electronic circuit board
2. Door safety interlock
9. Inverter
10. Motor
21.7.5 Power supply to motor
Three-phase power is fed by the inverter (10), which sends through the connectors J2-2 J2-3 J2-4 the three
phases to connectors 1-2-3 on the motor (nodes U-W-V), where the windings (Y-X-Z-) are connected.
The phase shift between the phases is 120° and peak amplitude is 310 V.
It is possible to get an idea of the efficiency of the motor by measuring the resistance
of the coils:
∼
Coil y ohm 6.43
±7% (contacts 2-3)
∼
Coil x ohm 6.43
±7% (contacts 1-2)
∼
Coil z ohm 6.43
±7% (contacts 1-3)
In the event of a fault an alarm will be displayed - see table of alarms.
Technical Support - DMM
89/124
599 75 58-67 Rev. 04
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