5
MVW01C (COMPACT)
5 MVW01C (COMPACT)
The line MVW01C is a variable frequency inverter destined to control medium voltage induction motors with nominal voltages of 2300 V, 3300
V, 4160 V, 6300 V and 6900 V, with a power range from 500 to 2250 HP. It uses non-controlled semiconductors (diodes) at the input rectifier
stage and controlled semiconductors (HV-IGBTs) to generate the three output phases at the inverter stage, in order to control the motor speed
and torque.
The MVW01C inverter line uses the same topology as the MVW01 line and has as the main feature compact dimensions. In order to achieve
such dimensional reduction, all the inverter components are scaled to the power range of this product line. Another feature of this line is that
in its standard version the inverter uses an 18 pulse rectifier bridge, which demands a special transformer with 3 secondary windings and 20°
phase shift among them.
The MVW01C presents protections against overload, short-circuit, phase loss, undervoltage, overvoltage, overtemperature, and ground fault,
it also has an independent fault monitoring for each HV-IGBT, has pressure sensors for ventilation efficiency monitoring. The control type can
be selected by the user, between scalar control (constant V/f ratio) and vector control (with sensorless or encoder feedback).
Mains supply: 3~50/60 Hz
Input cubicle
Input transformer
MVW01
Main circuit breaker
or contactor
Diode input
rectifier (12,
18 or 24 pulse)
DC link
capacitors
Multilevel inverter
NPC 3 or 5 levels
Figure 5.1: General block diagram
MVW01 | 5-1
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