Overview
2.4 Applications
Product User Manual
28 Operating Instructions, Version AE 12/2009, A5E01454341C
2.4 Applications
● Oil and gas (including long cables)
● Municipal water
● Power Generation
● HVAC
● Cement
● Chemicals
● Research
2.5 Evolution
Historic Milestones:
1994: World’s 1
st
fully integrated voltage source inverter (VSI) medium voltage motor
drive using IGBTs that meet IEEE 519 for input current distortion and NEMA/IEC
for motor HVF (without using output step-up transformers or line/load filters).
1995: 1
st
IGBT-based 6.6 kV drive without an output transformer.
1996: 1
st
IGBT-based drive above 10000 Hp (7500 kW).
1998: Introduction of ProToPS
TM
and 500
th
Perfect Harmony drive installed.
1999: Introduction of process-transparent cell bypass ("fast bypass") capability and
neutral point shift.
2000: 1
st
VSI drive to operate a medium voltage synchronous motor.
2001: 1000
th
Perfect harmony drive installed.
2002: 1500
th
Perfect Harmony drive installed.
2003: 1
st
High Voltage 13.8 kV drive capable of operating motors from 4000 to
90000 Hp connected directly to 13.8 kV source.
2004: Built largest PWM drive, 80000 Hp.
2006: Introduction of smallest footprint medium voltage VFD, GenIV "MicroHarmony".
2.6 Intellectual Property
The Perfect Harmony topology and features are protected by the following patents:
5,625,545 6,222,284 6,313,600
5,986,909 6,236,580 6,411,530
6,014,323 6,262,555 6,417,644
6,166,513 6,301,130 6,762,947
7,554,804
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