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I am trying to detect the zero crossing point of back emf in a bldc motor in order to control it sensorless. Do you have any idea what detection circuit should I use. I am thinking about a network resistor and 3 comparators on each phases. Thank you !

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  • \$\begingroup\$ Impossible to answer if you don’t have the motor’s topology: delta or Y? \$\endgroup\$ – PDuarte Nov 21 '18 at 15:27
  • \$\begingroup\$ Of course is Y topology \$\endgroup\$ – pantarhei Nov 21 '18 at 16:14

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