ETAS ES5340.2, User Manual

Page: 9 / 120

ES5340.2 Electric Drive Simulation Board - User’s Guide 9
ETAS Introduction
Fig. 1-2 shows the most important in- and output variables of the simulation
model. These variables can either be connected with another PC-based simula-
tion model or output as electrical signals using the ES5340.2 Electric Drive Simu-
lation Board or other hardware.
Fig. 1-2 Inputs and outputs of the FPGA model
1.1.3 Real-Time PC Model
Alternatively, a model of the electric motor can also be simulated on the Real-
Time PC. The ES5340.2 Electric Drive Simulation Board located in this Real-
Time PC (or connected to it via a PCI-Express expansion system) serves as an ana-
log and digital I/O interface to the ECU.
Thus low latencies of between 5 μs and 10 μs are obtained for measurement of
the PWM control signals (for the inverter).
RPM Unit
The RPM unit present on the ES5340.2 can take over the position and speed of
the electric motor calculated by the model and then function as the RPM master
in the system.
Prediction of the Phase Currents
The current signals are output, supported by hardware, with an update rate of
1 MHz. By means of prediction, this takes place independently of the step size of
the Real-Time PC simulation model.
Clock Recovery for IGBT Control Signals
The synchronization for measuring the duty cycles and the control signals takes
place using an external synchronization signal or using clock recovery, i.e. the
automatic synchronization of center-aligned PWM control signals.
6 x
PWM Gate Signal
Vehicle Power Stage
phi_mech
omega_mech
load torque
PMSM
phi_elec
3 x
U_back_emf
P_loss
omega_elec
torque_elec
U_DC
3 x
U_phase
3 x
I_phase
6 x
U_switch
6 x
I_element
I_DC
U_Batt0
E-Motor
I_Batt0 I_DC