ETAS ES5340.2, Руководство пользователя

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ES5340.2 Electric Drive Simulation Board -User’s Guide 35
ETAS Hardware Description
Sine Extrapolated
If a model that runs on the Real-Time PC is used for the simulation, it can be used
to generate sinusoidal signals such as phase currents I
u
, I
v
,I
w
.
With each computing cycle, the Real-Time PC model calculates an amplitude
value for each phase current and phase voltage and a phase for these. With
these values, the phase currents or phase voltages are output, independently of
the computing cycle of the PC-based model, with an update rate of 1 μs.
The advantage of this is that the output signals are not step functions (with the
step size of the PC-based model), but rather are output continuously, so to
speak.
The signal generators are controlled by the central RPM unit, which runs at the
mechanical angular velocity.
Analog Arbitrary
Here, preset "waveform tables" are output – the following can be configured:
• The amplitude value
• A voltage offset
• A phase
• The value for a phase change speed
Outputs for arbitrary signals can be used to output user-defined signal patterns
(based on the current angle of the simulated electric motor).
This signal pattern can be used, for example, to simulate specific position sensors
and other variables with a direct relationship to the motor angle.
Update of sensor values every dT Continuous update of sensor values