ASC712 current sensors

runger · April 17, 2022, 6:20pm

Nano is 5V, so that’s ok, but it might be a bit slow for FOC + current sensing. You’ll have to try.

For the code, see the example:

simplefoc/Arduino-FOC/blob/master/examples/hardware_specific_examples/SimpleFOCShield/version_v2/single_full_control_example/single_full_control_example.ino


#include <SimpleFOC.h>

// BLDC motor & driver instance
BLDCMotor motor = BLDCMotor(11);
BLDCDriver3PWM driver = BLDCDriver3PWM(5, 10, 6, 8);

// encoder instance
Encoder encoder = Encoder(2, 3, 500);
// channel A and B callbacks
void doA(){encoder.handleA();}
void doB(){encoder.handleB();}

// inline current sensor instance
// check if your board has R010 (0.01 ohm resistor) or R006 (0.006 mOhm resistor)
InlineCurrentSense current_sense = InlineCurrentSense(0.01f, 50.0f, A0, A2);

// commander communication instance
Commander command = Commander(Serial);
void doMotion(char* cmd){ command.motion(&motor, cmd); }

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When you construct the current sensing, change the pins to the ones you are using. I think the following values would work for the 66mV/A version:

InlineCurrentSense current_sense = InlineCurrentSense(1.0f, 1.0f/0.066f, A0, A1, A2);

Initialisation:

  current_sense.init();
  motor.linkCurrentSense(&current_sense);
  motor.current_limit = 4.0f; // 4A limit