swear_swear
New Member
I am designing a PWM close loop DC brushless motor control circuit.
For open loop speed control, there are no problem.
But now I would like to design a close loop automatically speed adjustment circuit. E.g: for a range of loading applied, the control circuit can auto adjust to a constant speed.
I am thinking on sensing the output current of the coil and feedback to the PWM control to adjust the duty cycle of each pulse.
But still don't know how to design the current sensing circuit.
Can any professional guy help me to finish the design??
Really thx. :shock: :shock: :shock:
For open loop speed control, there are no problem.
But now I would like to design a close loop automatically speed adjustment circuit. E.g: for a range of loading applied, the control circuit can auto adjust to a constant speed.
I am thinking on sensing the output current of the coil and feedback to the PWM control to adjust the duty cycle of each pulse.
But still don't know how to design the current sensing circuit.
Can any professional guy help me to finish the design??
Really thx. :shock: :shock: :shock: