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understanding
of the user's application, national standards
and the prevailing ambient conditions site
is also essential engineer fully satisfying
drive system.
Optimised system performance
combined with high reliability
and availability -
the target our systems engineers
It not sufficient just consider the motor
and the converter when deciding suitable
voltage level.Engineering MEGADRIVE-LCI-system
Engineering converter-fed drive involves
selecting and matching the motor and the
converter satisfy requirements determined
by the load, the supply system, the ambient
conditions and the process. Overall efficiency, the switchgear
and other characteristics the specific plant
have included well.
The main steps engineering a
MEGADRIVE-LCI system are:
Selection the optimum
system and circuit according to
• motor rating and speed
• motor torque/speed characteristic
• specified dynamic response
• speed control range
• power factor and voltage distortion
constraints the power system
Design the converter components
in relation the drive parameters
to optimise the system with regard to
• voltage, current and frequency
• reactances
• characteristics and number of
semiconductors
• protection
• cooling
• reliability and availability
• control
• overall efficiency
• total cost
An optimum drive system can only be
achieved there close cooperation between
the machine and converter design engineers
and this given top priority ABB.
A MEGADRIVE
system the
total solution
Transport and erection Commissioning
16
. Standard computer
programs are employed for network analysis,
harmonic filter design, simulation transient
behaviour, examination the mechanical
operation etc. The
torsional forces exerted the shaft train
are analysed computer ensure proper
mechanical performance. The motor
design must take due account the losses
resulting from the harmonic content current
and voltage and the pulsating torque
