User Manual
27 of 47
Revision 1.4
2020-07-16
EVAL-M3-IM564 User Manual
iMOTION
™
Modular Application Design Kit
Hardware description of EVAL-M3-IM564
=
+
= 10
Based on this calculation, the motor current input scaling of EVAL-M3-IM564 is 100 mV/A. Please use the same
procedure to calculate the current input for other combinations of MADK boards, and enter it into MCEWizard.
The MCEWizard setting as shown in Figure 23.
Figure 23 Current feedback configuration in MCEWizard for EVAL-M3-102T and EVAL-M3-IM564
4.2.3
Inverter overcurrent protection and motor Gatekill configuration
Figure 24 displays the overcurrent protection circuitry. The current sensing signal INV_ADC is connected to
ITRIP via the threshold divider resistor R41/R40, and ITRIP is filtered through capacitor C38.
Figure 24 Overcurrent protection circuit on the EVAL-M3-IM564 evaluation board
The typical value of ITRIP positive-going threshold V
IT, TH+
is 525 mV. So the inverter output peak current is
calculated by
=
,
×
+
−
×
If the motor peak current is larger than the setting value I
trip
for more than ITRIP input filter time, VFO will
trigger low, which means that the gatekill signal is active. For iMOTION
™
IMC1xx control IC, there are three