Dc Bus Sensing And Mcewizard Configuration; Motor External Current Feedback Configuration And Calculation - Infineon iMOTION EVAL-M3-IM564 User Manual

EVAL-M3-IM564 User Manual
iMOTION™ Modular Application Design Kit
Hardware description of EVAL-M3-IM564
5.2.1

DC bus sensing and MCEWizard configuration

Pin 14 and pin 26 of connector J3 provide access to the DC-link voltage DCBsense. Three possible feedback
cases are associated with these pins. Figure 19 provides the DC bus sense resistor details. By default, the
resistor R21 is not mounted on EVAL-M3-IM564. There must be a pull-down resistor mounted on the
corresponding controller board.
Figure 19 DC bus sense resistor on EVAL-M3-IM564 Evaluation board
If a pull down resistor of 13.3 kΩ referred to ground is inserted either on the EVAL-M3-IM564 Evaluation board or
on the control board, the DCBSense voltage results in the range of 0 to 3.3 V on the pin reflecting a DC bus
voltage range of 0 to 420 V.If a pull down resistor of 13.3 kΩ is inserted on both, EVAL-M3-IM564 Evaluation
board and on the control card, the DCBSense results scale to 0-1.65 V. No safety issue occurs. If no feedback is
desired on the DCBSense pin, R6 or R14 should be removed to avoid high voltage on the connector.
The high side resistors R6 and R14 for the DC bus sensing resistor divider on the controller board EVAL-M3-
IM564 are 2000kΩ, and should be configured in MCEWizard as shown in Figure 20. For the low side resistor
value, please refer to the User Manual of the corresponding control board.
Figure 20 DC bus sensing configuration in MCEWizard
5.2.2

Motor External Current feedback configuration and calculation

The current input value is product of the shunt resistance in milliohms and gain of External current sense
amplifier for EVAL-M3-102T as shown in Figure 21.
User Manual
DCBUS
R6
1.00M, 1%
R14
1.00M, 1%
DCBsense
DCBSense
R21
DNI
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2019-09-17