Banggood 1592604 brushless controller. Does have a Hall effect connector. My motor. Now with a bad/failed drive does not use hall, must be integrated in the 3 ph coil current.What is the make and/or origin of the motor, generally for P.M. AC or BLDC motors, some form of commutation is necessary, either hall or by current sensing.
What type of brushless controller were you thinking of, BLDC?
Obviously with an already AC signal of the proper type you don't need additional commutation with a motor designed to run with an AC signal.Sensorless BLDC motor control—sometimes called sensorless trapezoidal control of BLDC motors—uses back EMF (BEMF) for determining the location of the motor's rotor (the motor's rotating part) with respect to the motor's stator (the stationary part).
A voltage applied across a motor's winding forces the motor's rotor to turn. The movement of the rotor through the motor’s magnetic field, however, is analogous to the behavior of a generator, and consequently the motor not only receives an applied voltage but also generates its own voltage. This voltage is referred to as back electromotive force, or back EMF, and it is proportional to the motor's rotational speed. Back EMF can be used to determine a motor's rotor speed and position—no sensors are required. Controlling a motor by means of back EMF is not a simple task; most sensorless BLDC motors are controlled using a microcontroller, a digital signal processor, or a dedicated driver IC.
Yes, commutation of the DC power source to a 3-phase AC motor drive signal. BLDC block-commutation using Hall coding (two winding's of three are energized at any one time for the positional code duration (100%) using simple DC ON/OFF switching) is just one way to commutate DC power for a BLDC synchronous motor.The BLDC and P.M. 3ph AC motor are practically identical, the difference is in the commutation, in the BLDC, only two winding's are energized at any one time, in the AC 3ph the supply is a 3ph sinusoidal power is applied.
One can be converted to the other, I have done this in the past by converting 3ph to BLDC.
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by Jake Hertz
by Jake Hertz