59
SET Power systems gmbh
SET Power Systems
is a member of the AVL Group and a
leading global supplier of inverter test-
ing systems. Our main focus is on smart
power electronics that operate at very
high switching speeds and thereby pro-
vide close-to-analog amplifier character-
istics. We have established a new test-
ing method that was used in 2003 for the
first time: a virtual electric motor replac-
es the conventionally required mechani-
cal loading system, thus providing a com-
plete testing environment in a lab. Since
then, the testing tool “virtual e-machine”
has been perfected and is now available
to our customers as a closed power-hard-
ware-in- the-loop-solution (P-HiL). The
testing scope ranges from auxiliary units
to high-performance drive inverters.
Drive Inverter Testing
is one application for high speed switch-
ing amplifiers. Today, drive inverters for
electrical motors have demanding re-
quirements on functionality and safety –
which must be tested in a close-to-reality
environment. The core of our inverter test
system is the e-machine emulator that
reproduces the function and dynamic
behaviour of a real electric motor in
realtime using mathematical models.
These test systems have been
designed to be extremely flex-
ible in order to cover a large
variety of tests for a wide range
of inverters and converters. The
power spectrum ranges from
approximately 10 to more than
400 kW with voltages of more
than 900 V and currents of up
to 1.200 ARMS.
Our Virtual E-Machine
is a “game changing technology” for drive
inverter testing. E-machine emulation
(EME) technology is an elegant way to by-
pass the “mechanical world” used to test
inverters. Wherever an electric motor is
used to test drive inverters, EME technol-
ogy demonstrates convincing advantages.
This solid-state e-motor has no rotating
parts and no mechanical limitation. Invert-
er testing with a virtual e-motor replaces
heavyweight mechanical setups with real
motors and dynamometers.
Improved Test Methodology
for inverters is one outcome of the virtual
e-motor technology. The e-motor emula-
tor is a Power-Hardware-in-the-Loop sys-
tem that permits test methodology to be
run according to the new functional safety
regulation ISO 26262.
Close-to-Reality
is the design target for an e-motor emula-
tor. SET Power Systems specializes in high
dynamic amplifiers, high-speed instru-
mentation and high fidelity motor models
to provide realistic e-motor characteristics
over the complete operational range.
No Mechanical Limitation
is the obvious advantage of the emulator
technology, which allows:
•
Extremely high dynamics
•
Excellent fault stimulation
•
Motor change via software
A Wide Range of Test Applications
has already been addressed:
•
Auxiliary ECUs
•
Powertrain inverters
•
Industrial inverters
•
Aerospace inverters
•
High speed inverters
•
Formula 1 KERS
