Does the brushed DC motor and Permanent magnet Dc motor need position feedback in the control system

[mitardraskovic]

Hello guys. I am an electrical electronics engineering student. I have two questions. if you answer my questions ı'll be happy. Thank you from now.

Does the brushed DC motor need position feedback in the control system? why?

Does the permanent magnet dc motor need position feedback in the control system? why?

 

[Lucien Nunes]

Those questions don't make sense without context, and they also look like study questions which we won't answer for you although we'll help you answer them yourself.

If you mean position feedback to the drive electronics, then the difference lies in the method of commutation. How is a PM motor commutated? What governs the relationship between rotor position and which coil(s) are energised?

If you mean position feedback to the servo system itself, then the application dictates the answer. A lathe axis-drive and a fuel feed auger could both be part of a closed-loop control system, but only one requires positional feedback.

 

[oracle]

As noted above context is required, since you are an electronics student I suppose you are asking about DC motors, stepping motors and servo motors?

 

[Lucien Nunes]

the speed will be directly proportional to the armature current.

I think you meant to say voltage, not current!

But the OP asks about position feedback, not velocity feedback...

 

[oracle]

I think you meant to say voltage, not current!

But the OP asks about position feedback, not velocity feedback...

Thank you, edited and rephrased!

 

[mitardraskovic]

Thank you for your help. I want to explain my question again.
Is the position feedback required in the brushless and brushless DC motor control system? why?. That's the question

 

[Lucien Nunes]

How would you answer this question?

 

[Spoon]

Thank you for your help. I want to explain my question again.
Is the position feedback required in the brushless and brushless DC motor control system? why?. That's the question

Welcome to the forum mate.
If you give us your thought on the answer then we will give ours. That way you will learn more.

 

[PEG]

Hi,you have not explained the question,just re-asked it

More detail regarding the type of motor,and it's use and control,would be needed to provide an answer.

At the moment,we are at the "Do i need to wear a jumper?" stage...

 

[Silly Sausage]

Does the brushed DC motor need position feedback in the control system? why?

Does the permanent magnet dc motor need position feedback in the control system? why?

Are we suffering a poor computerised Turkish-English translation problem here?

Can you give us the FULL question?