STMicroelectronics STM32F PMSM single/dual FOC SDK v4.2 Motor Control Software Development Kit User manual

Current sensing and protection on embedded PGA
6.5.1
UM1052
Single shunt topology
For each motor, according to configuration (as explained in Section 6.2: Current sensing
and Section 6.3: Overcurrent protection), one ADC, OPAMP and comparator must be
assigned.
6.5.2
•
If "Embedded PGA" is enabled, the selection of ADC peripheral (and input pin) is linked
to this specific PGA peripheral.
•
If "Embedded HW OCP" and "Embedded PGA" are enabled, the selection of ADC and
comparator (and their input and '+" pins) is linked to this specific PGA peripheral (and
its '+' input).
•
If "Embedded HW OCP" is enabled and "Embedded PGA" is disabled, the selection of
comparator is free.
•
If "Embedded HW OCP" and "Embedded PGA" are both disabled, the selection of
comparator and ADC is free.
•
If both PGA and comparator for OC protection are used they will share the same input
pins for the motor current measurement signal.
Three shunts topology mixed with Single shunt topology
According to configuration (as explained in Section 6.2: Current sensing and Section 6.3:
Overcurrent protection), 2 ADCs, 2 OPAMPs, 3 comparators, 1 DAC channel must be
assigned.
72/176
•
If "Embedded PGA" is enabled, the selection of ADC peripherals (and input pins) is
linked to this specific PGA peripherals.
•
If "Embedded HW OCP" and "Embedded PGA" are enabled, the selection of ADCs and
comparators (and their inputs and '+" pins) is linked to this specific PGA peripherals
(and theirs '+' inputs).
•
If "Embedded HW OCP" is enabled and "Embedded PGA" is disabled, the selection of
comparators is free.
•
If "Embedded HW OCP" and "Embedded PGA" are both disabled, the selection of
comparators and ADCs is free.
•
The pair OPAMP1/OPAMP2 can be used in a project based on STM32F302 or
STM32F303; the pair OPAMP3/OPAMP4 can be used additionally in a project based
on STM32F303.
•
The pair ADC1/ADC2 can be used in a project based on STM32F302 or STM32F303;
the pair ADC3/ADC4 can be used additionally in a project based on STM32F303.
•
If both PGA and comparator for OC protection are used they will share the same input
pins for the motor current measurement signal.
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