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Topic: Types of motor controllers that can handle 3A+ (Read 1 time) previous topic - next topic

tawandapro

Hello everyone im quite new to arduino and i need a few pointers to get me started.

I have had a go at using Arduino to control LED'S and a custom made 4wd rover to go forward backward (the basic stuff while i am waiting for sensors for it).

My real question here is are there any good motor controllers out there than can handle 3Amps+? Im building a new rover that uses 4 metal gear motors each with a stall current of 1.7A. its going to be a differential steering setup so i  will be needing atleast 3.4amp to each pair of motors.

The 4wd rover i was taking about uses 2 30 amp ESC's that i have gotten to work well using the servo library. Should i just use the 30 amp controllers or should i use two of these in parallel:

http://www.ebay.com.au/itm/2pcs-L298N-Dual-H-Bridge-DC-Stepper-Motor-Drive-Controller-Board-Module-Arduino-/310413203176?pt=LH_DefaultDomain_0&hash=item48461196e8&_uhb=1#ht_5346wt_1271

Here is my 4wd rover which will be soon used as a search and rescue robot once my sensors arrive. (ultrasonic and colour sensor)
http://www.youtube.com/watch?v=q_ogGwH69bU
and
http://www.youtube.com/watch?v=5-miIj58C20




ash901226

actually The one that you posted can handle 4amp its just that you need to connect both A and B together. meaning its logic and its output. this is cause the IC is made to drive 2 DC motor with current of 2A each.

rweber95

The 2503 is dual 3 A w/o heat sink, 5 A peak.  Adding a heat sink and /or fan would increase that capacity.  This driver uses the MC33926 which has current limiting if you over heat it.  Pololu test results delivered 5 A on both channels for 10 sec. before thermal protection started reducing the current.  It delivered 4 A for 37 sec. before limiting.  It did 3 A all day without limiting.

If you want lots of power, the 2502 can handle dual 25 A drive capability.

Here is a link to a table comparing all of their drivers http://www.pololu.com/search/compare/11


Bob Weber

tawandapro


The 2503 is dual 3 A w/o heat sink, 5 A peak.  Adding a heat sink and /or fan would increase that capacity.  This driver uses the MC33926 which has current limiting if you over heat it.  Pololu test results delivered 5 A on both channels for 10 sec. before thermal protection started reducing the current.  It delivered 4 A for 37 sec. before limiting.  It did 3 A all day without limiting.

If you want lots of power, the 2502 can handle dual 25 A drive capability.

Here is a link to a table comparing all of their drivers http://www.pololu.com/search/compare/11


Bob Weber


should i just use the ESC'S that i am using on the 4wd rover instead? The pololu ones are pricey plus the postage will drain my budget

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