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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

MarkT



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


No idea - what kind of ESCs are they, brushless or brushed?  I presume your gear motors will be brushed from the discussion
above but you haven't given details of the existing set-up.
[ I won't respond to messages, use the forum please ]

tawandapro




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


No idea - what kind of ESCs are they, brushless or brushed?  I presume your gear motors will be brushed from the discussion
above but you haven't given details of the existing set-up.


They are brushed esc's and brushed 540 motors. The esc is this kind
http://www.ebay.com.au/itm/New-320A-Speed-Brushed-Controller-ESC-1-8-1-8-1-10-RC-Car-Truck-Buggy-Boat-/110933808971?pt=AU_Toys_Hobbies_Radio_Controlled_Vehicles&hash=item19d42b974b

I am using the servo library to control the esc's the signal wire is connected directly to the pwm pins in the arduino uno i have and i have controlled them arduino just backward forward motion.

zoomkat

Search ebay for H-bridge (with loweswt price first) and you willsee h-bridge controllers that go from 1a to 50a in capacity.
Consider the daffodil. And while you're doing that, I'll be over here, looking through your stuff.   8)

MarkT



They are brushed esc's and brushed 540 motors. The esc is this kind
http://www.ebay.com.au/itm/New-320A-Speed-Brushed-Controller-ESC-1-8-1-8-1-10-RC-Car-Truck-Buggy-Boat-/110933808971?pt=AU_Toys_Hobbies_Radio_Controlled_Vehicles&hash=item19d42b974b

I am using the servo library to control the esc's the signal wire is connected directly to the pwm pins in the arduino uno i have and i have controlled them arduino just backward forward motion.


They ought to work nicely with any brushed motors I think (no shortage of power!).  The Servo library doesn't mandate the use of PWM
pins BTW - its interrupt-driven rather than using the hard-wired timer-counters, can control any pins.
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permnoob

If you get one from ebay, atleast double your needs, cause often what they say they can handle is only true if you put a fan on it and putit in an icebox.

dc42

Formal verification of safety-critical software, software development, and electronic design and prototyping. See http://www.eschertech.com. Please do not ask for unpaid help via PM, use the forum.

MarkT


If you get one from ebay, atleast double your needs, cause often what they say they can handle is only true if you put a fan on it and putit in an icebox.


In what way is a 320A ESC not overkill already? Three hundred and twenty amps....  Even if that's an exageration by a factor of ten its
still going to drive a 3A motor!
[ I won't respond to messages, use the forum please ]

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