UM0971 datasheet(28/45 Pages) STMICROELECTRONICS

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STEVAL-IHM0031V1 hardware settings

UM0971

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Doc ID 17701 Rev 1

4.2

Settings for three-shunt configuration and FOC control

PMAC motors driven with field oriented control techniques need proper hardware

configuration of the three-phase inverter power stage. In particular, currents flowing in the

motor phases must be read through shunt resistors and their values must be amplified for

control unit processing. Generally, the current conditioning network has a different topology

than the one used in scalar control.

Sensored and sensorless techniques for motor speed reading can also be used in FOC

control.

Table 19 shows the jumper settings according to the three-shunt current reading

configuration.

Between 1 and 2

Table 17.

Sensorless mode - jumper configuration (low BEMF reading w/o

amplification)

Jumper

Position / selection

Between 1 and 2

Table 18.

Virtual neutral point reconstruction - jumper configuration

Jumper

Position / selection

Between 1 and 2 - for three resistors reconstruction

Between 2 and 3 - for DC bus voltage reconstruction

J18

Between 1 and 2

Table 16.

Sensorless mode - jumper configuration (BEMF reading w/o

amplification) (continued)

Jumper

Position / selection

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