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PWM help - 1/23/2012 11:31 PM   
Daddysharky


 

Posts: 1
Score: 100
Joined: 1/23/2012
Last Login: 1/24/2012
From: , NC, USA
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Hi, I am new here and was wondering if someone might be able to help me with a question. My robot is homebuilt on wheels. I want to steer the bot with an electric window actuator (from a car) The motor turns much to fast to control so I want to use a PWM to slow it way down. My question is what size PWM do I need. (size =volt and amp rating)

Here are the specs of what I am using 
~Sealed Lead-acid Batteries (12v12ah/20hr) 2 in series) 
~Dorman 741-814 window actuator (Just the 12 volt motor!) 
~DPDT switch wired for reverse to turn wheels left and right (servo attached to run remotely) 

Links to products used: 
http://www.energexbatteries.com/products.php?product=Sealed-Lead-Acid-12v-12ah%7B47%7D20hr 

http://www.amazon.com/Dorman-741-814-Mountaineer-Passenger-Regulator/dp/B000E347L6 

http://www.radioshack.com/product/index.jsp?productId=2062530 

Thanks for any advice. Also if you have a better less expensive approch I will take any suggestions.


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RE: PWM help - 3/16/2012 5:09 PM   
dknovick



Posts: 2009
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Joined: 1/19/2005
Last Login: 5/7/2013
From: Albuquerque, NM, USA
Status: offline
quote:

ORIGINAL: Daddysharky

The motor turns much to fast to control so I want to use a PWM to slow it way down. My question is what size PWM do I need. (size =volt and amp rating)


Do you mean what size speed controller do you need?

You may want to start smaller. These places all have good kits and parts:
http://www.pololu.com/
http://www.trossenrobotics.com/
http://www.acroname.com/

Getting back to your first question. The size of the speed controller depends on the voltage and current required for your motors.

-Dave

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Helicopter: Closest fulfillment of the flying horse and magic carpet. Igor Sikorsky
Royal EVO9 TX/F40,HBFP,Trex450Sport

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(in reply to Daddysharky)
       Post #: 2

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