SIEMENS
ROBICON Perfect Harmony
Liquid-cooled drives
2
2/8
Siemens D 16.2 – 2012
Technical characteristics
WCIII
ROBICON Perfect Harmony WCIII is the third generation of
liquid-cooled medium-voltage pulse width modulated variable
frequency motor drives, offered in the patented ROBICON
Perfect Harmony power topology in concert with proprietary
NXGII hardware control platform and embedded software.
The WCIII is a series of adjustable speed AC motor drives
presently available in an output voltage range from 2.3 kV
to 8.0 kV,
1)
and loads ranging from 4000 to 19000 hp. Two
power cell amperage types are available: 880 and 1250 A
at 750 V AC.
ROBICON Perfect Harmony WCIII
ROBICON Perfect Harmony WCIII, characteristics
Power semiconductors
IGBTs, diodes
Lineside rectifier
18 to 36 pulse diode rectifier
Motorside inverter
Multilevel drive (PWM) with IGBT power modules
Power cells
A
880, 1250 at 750 V
Input voltage range
kV
2.3 to 13.8
Input voltage tolerance
+10%, -5% of nominal rated input voltage
Input frequency
Hz
50/60 ± 5 %
Input power factor
≥ 0.95 above 10 % load
Input harmonics
≤ 5 % Total demand distortion (TDD)
Output voltages
kV
2.3/2.4, 3.3, 4.0/4.16, 4.6/4.8, 6.0, 6.6, 6.9/7.2
Output frequency and drift
Hz
0.5 ... 330 ± 0.5 %
Output torque
Rated torques 2 quadrant available from 10 - 167Hz
3)
Output dV/dt
V/µs
< 1000
Power range
hp
4000 to 19000 (3 to 14.2 MW)
2)
Cooling method
Deionized water with separate heat exchanger
Control
Vector Control (NGXII serious)
Motor control
• Induction motor control
• Synchronous motor control
• Permanent magnet motors
• Wound rotor motors
1)
8kV output voltage is available on request, please consult the factory.
2)
Drive power is limited to 15.6MVA.
3)
ROBICON Perfect Harmony Drives, when derated properly, are available for high frequency applications with derated torque.
WCIII cell overload capability
Required overload
(
I/I
N
)
Available continuous output current per cell
A
No overload
880
1250
110 %
(for 1 min, cycle time 10 min)
880
1250
150 %
(for 1 min, cycle time 10 min)
660
950
Note: The WCIII drives, as standard, provide a 110% overload capability for all cell ratings without any derating.
Selection and Ordering Data