Sensorless control of brushless motors

Many applications would benefit from a brushless motor without a sensor. There are various options for realizing this. A method developed by maxon is now setting new standards for precision and reliability.

Driving a brushless motor requires control electronics for precise commutation. However, this is possible only if the control electronics “know” the exact position of the rotor at all times. Traditionally, this information was provided by sensors, e.g. Hall sensors, installed inside the motor. But it can be done differently.

Read about the three basic principles that are easily adapted.

  • Why sensorless control?
  • Cost optimization for high control performance
  • Rough ambient conditions



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