Author Topic: Motor and motor driver help  (Read 507 times)

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Offline husein06Topic starter

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Motor and motor driver help
« on: December 02, 2012, 02:12:56 PM »
What motor drivers would fit these motors well? any idea

Hello,

I'm using this motor and an Arduino
Motor Ratings (at 7.2 VDC):
No-load Current: 0.27 A @ 310 RPM
Stall Current: 4.8 A
Max Torque: 4.6 lb-inch (5.3 kg-cm)
http://www.parallax.com/StoreSearchResults/tabid/768/List/0/SortField/4/ProductID/587/Default.aspx?txtSearch=motor+wheel+kit

Does anyone have a good idea about a motor driver that would work well with this motor?

Offline Gertlex

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Re: Motor and motor driver help
« Reply #1 on: December 02, 2012, 02:36:07 PM »
This is probably overkill, but I've used it.  You can also have it do PWM output, to reduce e.g. 11.1V LiPo voltage to effectively 7.2V for the motors:
http://www.pololu.com/catalog/product/707/specs

Pololu has lots of motor driver boards, so look through them there.  They're quality, but many may object to the price ;)
I

Offline husein06Topic starter

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Re: Motor and motor driver help
« Reply #2 on: December 02, 2012, 02:58:22 PM »
This is probably overkill, but I've used it.  You can also have it do PWM output, to reduce e.g. 11.1V LiPo voltage to effectively 7.2V for the motors:
http://www.pololu.com/catalog/product/707/specs

Pololu has lots of motor driver boards, so look through them there.  They're quality, but many may object to the price ;)


But isnt the amp to high on those? the motors have 4.7 amp stall... the motor driver u suggested is  15 A continuous?

Offline Soeren

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Re: Motor and motor driver help
« Reply #3 on: December 02, 2012, 03:35:43 PM »
Hi,

But isnt the amp to high on those? the motors have 4.7 amp stall... the motor driver u suggested is  15 A continuous?
A motor driver doesn't "send out" current, the motor draw what it needs (if possible).
However, you should limit the current to less than the stall value, or the motor may overheat (in case of stall) and burn some vindings.
Regards,
Søren

A rather fast and fairly heavy robot with quite large wheels needs what? A lot of power?
Please remember...
Engineering is based on numbers - not adjectives

 


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