SIEMENS
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Siemens D 15.1 · 2017
Introduction
Perfect harmony of performance and benefits
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Overview
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The benchmark when it comes to medium-voltage drive
systems
Siemens is the undisputed No. 1 in medium-voltage drives and
around the globe sets the benchmark in this field – and not only
involving power ratings and market share. Our range of products
is also unique worldwide:
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All voltage classes from 2.3 to 13.8 kV
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A seamless range of power ratings from 150 kW to 120 MW
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All levels of dynamic response and performance
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Single-motor drives and multi-motor systems
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Harmonized and coordinated systems with synchronous and
induction motors
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Motor speeds from 10 to 15,000 rpm in the Megawatt range
The decisive plus when it comes to experience
Wherever it involves the highest degree of availability, a high
number of users have been depending on medium-voltage
drives from Siemens since decades – and that worldwide.
The reason for this lies in the reliability of our drive systems,
which has become almost legendary. And all of this didn't just
happen by chance. It is the result of our many years of experi-
ence, our power of innovation and our extensive know-how.
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From 1969: Variable-speed medium-voltage drive systems
with current-source DC link
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From 1970: Cycloconverters – with more than 700 drives,
Siemens is the global market leader
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1994: The cell technology of SINAMICS PERFECT HARMONY
revolutionized medium-voltage drives
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1996: Pioneered the use of high-rating voltage-source DC link
drives in rolling mills
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1998: Pioneered the use of high-voltage IGBTs for medium-
voltage drives
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2003: Worldwide the highest rating high-speed drives
(65 MW) with LCI for compressors in a gas liquefaction plant
2005: Highest rating drive with voltage-source DC link drives in
a cell-type topology (65/45 MW) used in an LNG plant (LNG =
Liquefied Natural Gas)
Well-proven as basis
Based on well-proven technological concepts, we are continu-
ally developing our medium-voltage drives. The result: Increas-
ingly higher reliability and operational reliability and safety, con-
tinually more compact types of construction, continually lower
energy requirement and service and maintenance costs as well
as increasingly simpler handling – from engineering through
installation, integration and commissioning.
Always the optimum solution
No matter which medium-voltage drive task is involved: We can
always offer the optimum solution. We consequentially utilize the
strengths of various technologies to implement these solutions.
We have the widest range of drive technologies available – from
cycloconverters and current-source DC link drives using thyris-
tors through voltage-source DC link drives equipped with
HV-IGBTs or IGCTs up to cell topology drives. With the latter, a
medium voltage is obtained at the output by connecting
low-voltage cells in series.
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Benefits
According to energy authorities, industrial motors consume over
a billion kilowatt hours of energy each year. This represents
50 percent of the world's energy usage. System enhancements
such as improved sizing and proper matching to load, more
efficient drive trains, and variable speed drives will help drive
energy usage down, according to experts. That means that the
right drive can help you drive cost out of your operation by
providing more precise and efficient control.
The potential for reducing your costs is especially high if you are
operating pumps, fans or other electrically-driven machines in
your process. By not having the optimum process efficiency, you
are losing enormous sums of money every month, which in turn
has a negative impact on your operating result.
Siemens is the global market leader for medium-voltage drives.
They offer a wealth of advantages:
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Lower operating costs
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Precise process control
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Lower maintenance costs
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Increased production efficiency
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Exceptional reliability
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Intuitive HMI
The outstanding record of SINAMICS PERFECT HARMONY has
made it the drive of choice for demanding applications that
require the highest levels of reliability, precision and long service
life.
Employed in applications ranging from power generation to oil
and gas, water/wastewater and paper production, SINAMICS
PERFECT HARMONY drives play a decisive role in substantially
increasing productivity, improving energy efficiency and reduc-
ing operating costs.
© Siemens AG 2017