My BLDC controller can use different control strategies to drive a brushless motor. The simplest method is called block, trapezoidal or six-step commutation, whereas the more advanced method is called field-oriented control. The board also gives you the option to use position sensing based on either hall sensors or an encoder. In this post I will first present a block commutation method. Since the motor I had available did not have hall sensors, I have first developed a sensorless approach using back EMF sensing.

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