I/O Board
The I/O board supports
encoder, 24 V dc I/O, 115
V ac inputs and analog
I/O, standard. All I/O are
terminated to a two-piece
modular terminal block
for ease of maintenance,
located in right hand
cabinet.
Cell Inverters
Example: Three banks of
five series connected
inverter cells, each
containing:
• Diode bridge rectifier
• IGBT PWM inverter
• DC link long-life film capacitor
• Drawable module for ease of
maintenance
A Look on the Inside
4
MV Drive Technology for
medium voltage operation:
• Series connected inverter cell
architecture uses 1700 V IGBT
inverters for best reliability and high
energy efficiency
• Diode bridge rectifiers yield high
power factor operation
• Multi-winding transformer produces
low input power distortion
• Modular drawable power cell design
minimizes the time required for any
maintenance activities
Input Transformer
The special input
transformer has phase-
shifted secondary
windings to produce
multi-pulse converter
operation. This design
exceeds the IEEE 519-
1992 guidelines for
input current distortion.
Main Power Input
Four voltage levels are
available:
• 3-3.3 kV, 3-phase,
50/60 Hz
• 6-6.6 kV, 3-phase,
50/60 Hz
• 10 kV, 3-phase,
50/60 Hz
• 11 kV, 3-phase,
50/60 Hz
Air Cooling
Forced air cooling
system with:
• Intake through
cabinet doors
• Upward flow
through inverter
cells and transformer
• Exhaust at top
of cabinet
Control Functions
A single set of control
boards feeds all inverter
cells. The primary control
board performs several
functions:
• Speed and torque
regulation
• Sequencing
• I/O mapping
• Diagnostic data gathering
• Provision for optional
LAN interface
120822c1_MVG2(E).indd 4 12.8.22 8:37:21 AM