SIEMENS
1/3
Siemens D 11 · 2015
■
Overview
(continued)
1
System overview
The SINAMICS drive family
SINAMICS as part of the Siemens modular automation system
Innovative, energy-efficient and reliable drive systems and
applications as well as services for the entire drive train
The solutions for drive technology place great emphasis on the
highest productivity, energy efficiency and reliability for all
torque ranges, performance and voltage classes.
Siemens offers not only the right innovative variable frequency
drive for every drive application, but also a wide range of
energy-efficient low voltage motors, geared motors, explosion-
protected motors and high-voltage motors for combination with
SINAMICS.
Furthermore, Siemens supports its customers with global pre-
sales and after-sales services, with over 295 service points in
130 countries – and with special services e.g. application con-
sulting or motion control solutions.
Energy efficiency
Energy management process
Efficient energy management consultancy identifies the energy
flows, determines the potential for making savings and imple-
ments them with focused activities.
Almost two thirds of the industrial power requirement is from
electric motors. This makes it all the more important to use drive
technology permitting energy consumption to be reduced effec-
tively even in the configuration phase, and consequently to
optimize plant availability and process stability. With SINAMICS,
Siemens offers powerful energy efficient solutions which,
depending on the application, enable a significant reduction in
electricity costs.
Up to 70 % potential for savings using variable speed operation
SINAMICS enables great potential for savings to be realized by
controlling the motor speed. In particular, huge potential savings
can be recovered from pumps, fans and compressors which are
operated with mechanical throttle and valves. Here, changing to
variable-speed drives brings enormous economic advantages:
In contrast to mechanical control systems, the power consump-
tion at partial load operation is always immediately adjusted to
the demand at that time. So energy is no longer wasted, permit-
ting savings of up to 60 % – in exceptional cases even up to
70 %. Variable-speed drives also offer clear advantages over
mechanical control systems when it comes to maintenance and
repair. Current spikes when powering up the motor and strong
torque surges become things of the past – and the same goes
for pressure waves in pipelines, cavitation or vibrations which
cause sustainable damage to the plant. Smooth starting and
ramp-down relieve the load on the mechanical system, ensuring
a significantly longer service life of the entire drive train.
Regenerative feedback of braking energy
In conventional drive systems, the energy produced during
braking is converted to heat using braking resistors. Energy pro-
duced during braking is efficiently recovered to the supply sys-
tem by versions of SINAMICS G and SINAMICS S inverters with
regenerative feedback capability and these devices do not
therefore need a braking resistor. This permits up to 60 % of the
energy requirement to be saved, e.g. in lifting applications.
Energy which can be reused at other locations on a machine.
Furthermore, this reduced power loss simplifies the cooling of
the system, enabling a more compact design.
SIMATIC
SIMOTION
SINUMERIK
SINAMICS
Synchronous motors
Induction motors
G_D211_EN_00202f
DC motors
© Siemens AG 2015