SINAMICS G120
Standard inverters 0.37 kW to 250 kW (0.5 hp to 400 hp)
PM260 Power Modules –
11 kW to 55 kW (15 hp to 75 hp)
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Siemens D 11.1 · 2009
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Overview
Example: PM260 FSD Power Module
The PM260 Power Module features an absolutely unique tech-
nology – Efficient Infeed Technology. This feature provides the
ability to feed energy back into the supply system in the gener-
ator mode (electronic braking) so that the energy is not wasted
in a braking resistor. This saves space in the control cabinet. The
time-consuming process of dimensioning the braking resistor
and the expense of the extra wiring are eliminated. Furthermore,
heat losses in the control cabinet are reduced.
The innovative circuit design used in Efficient Infeed Technology
reduces the line harmonics. There is no need to use an optional
line reactor at the supply infeed. This saves space and costs for
engineering and procurement.
The PM260 Power Modules are also characterized by a higher
rated pulse frequency combined with a high efficiency and an
integrated sine-wave filter. The integrated sine-wave filter en-
sures that the inverter output current is sinusoidal and supports
cable lengths of up to 200 m shielded and 300 m unshielded. An
output reactor is therefore not required. Furthermore, lower bear-
ing currents and voltage stress are generated that reduces the
overall stress on the motor.
The use of SiC free-wheeling diodes – an absolutely unique in-
novation – makes the PM260 Power Module extremely compact.
It is also highly resistant to thermal loading and operates very
quietly as a result of the high clock frequencies.
Standard motors can be used in conjunction with the PM260
Power Module. The winding system insulation strength does not
have to be increased.
The PM260 Power Module is suitable for safety-oriented appli-
cations. In conjunction with a Fail-safe Control Unit, the drive can
be turned into a Safety Integrated Drive (see Control Units).
The PM260 Power Modules with integrated class A line filter are
suitable for connection to TN supply systems. Power Modules
without integrated line filter can be connected to grounded
(TN, TT) and non-grounded (IT) supply systems.
Overview of how customers benefit from Efficient Infeed
Technology
For more detailed information, please refer to the part Highlights,
in section Efficient Infeed Technology.
Overview of how customers benefit from SiC free-wheeling
diodes
7 Low switching losses at high fundamental frequency
7 High speeds possible
7 Quiet operation thanks to pulse frequency = 16 kHz
7 High thermal load capacity (small heatsinks)
7 Very compact units
7 Increased ruggedness
7 High efficiency
7 Low forward losses
7 Power unit with regenerative feedback capability
7 Integrated sine-wave filter, long unshielded cables can be
used
7 Can be used with motors without a special insulation
7 Very low bearing currents, no bearing insulation required
Standard
Technology
Efficient Infeed
Technology
G_D011_EN_00182
Line reactor
Braking resistor
Configuration
overhead
Generated
harmonics
Heat generated
when braking
Required
Required
Standard
Standard
Yes
Not required
Not required
Low
Minimal
No
Power infeed
Power consumption
Energy efficiency
Reactive power
compensation
Installation outlay
Standard
Standard
Standard
No
Standard
Approx. 22%
less
Approx. 22%
less
Good
Yes
Low
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