What is the difference

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woodturner550

New Member

• Sep 9, 2010

• #1

If I use PWM to control a DC motor or use a microcontroler to turn the power on and off fast. Both are controlling the amount of current the motor recieves, therefore the amount of power to be generated.

Most likely a dumb question, but had to ask.

woodturner550

 

atferrari

Well-Known Member

Most Helpful Member

• Sep 9, 2010

• #2

Please tell what do you actually mean with "PWM".

A micro can be used to implement PWM.

 

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woodturner550

New Member

• Sep 9, 2010

• #3

Pwm

Pulse width modulation.

Yes, I know that some microcontrollers can handle PWM. I am trying to figure out what would be the difference as the motor sees it, as well as the draw backs or advantages of either.

Thanks for you input and question.

woodturner550

 

3v0

Coop Build Coordinator

Forum Supporter

• Sep 9, 2010

• #4

The result will be the same. PWM turns the motor on and off rapidly.

In both cases the speed of the motor will depend on the % of on to off time.

 

Last edited: Sep 9, 2010

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woodturner550

New Member

• Sep 9, 2010

• #5

Thanks

Thanks for the confirming what I believed would be the answer.

I guess it all depends on the application of the process and what else is going on at the time.

woodturner550

It is nice to be able to double check ones thinking! Thanks again.

 

MikeMl

Well-Known Member

Most Helpful Member

• Sep 9, 2010

• #6

Motor cant tell if the PWM was generated by a uC or by a 555