Pages: [1] 2   Go Down
Author Topic: how to control 15 motors 0f 10A 12v motors  (Read 1577 times)
0 Members and 1 Guest are viewing this topic.
Offline Offline
Newbie
*
Karma: 0
Posts: 8
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

hi
i new to using motors, basic idea its build humaniod robot with 2 arm (each arm using 6 motors total 12 ) and 3 motors Hip Yaw/Pitch Joints

i searched for motor drivers but all it ended with L298 which is only 4A or too expensive control board
please suggest what microcontroller  i can use to control all these motors and schematic diagrams of driver circuts

link for motors i am using
http://www.vegarobokit.com/index.php?route=product/product&path=35_39&product_id=119
Logged

Massachusetts, USA
Offline Offline
Tesla Member
***
Karma: 208
Posts: 8822
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Unlikely you will find a motor control shield that can handle fifteen 10-amp motors.  I think you will need fifteen stand-alone motor drivers.  Pololu sells all sorts of motor drivers so they might be a good source. The "Jrk" series (http://www.pololu.com/catalog/category/95) includes capability to add position feedback which I assume you will want to add.
Logged

Send Bitcoin tips to: 1L3CTDoTgrXNA5WyF77uWqt4gUdye9mezN
Send Litecoin tips to : LVtpaq6JgJAZwvnVq3ftVeHafWkcpmuR1e

Global Moderator
Boston area, metrowest
Online Online
Brattain Member
*****
Karma: 533
Posts: 26933
Author of "Arduino for Teens". Available for Design & Build services. Now with Unlimited Eagle board sizes!
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Big power supply too - 12V,10A, 120 Watts! x 15!
Logged

Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

0
Offline Offline
Tesla Member
***
Karma: 141
Posts: 9541
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Recent discussion of a large h-bridge that might be of interest.

http://forum.arduino.cc/index.php?topic=148482.0
Logged

Consider the daffodil. And while you're doing that, I'll be over here, looking through your stuff.   smiley-cool

0
Offline Offline
Shannon Member
****
Karma: 206
Posts: 12048
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Big power supply too - 12V,10A, 120 Watts! x 15!

Massively heavy robot too....
Logged

[ I won't respond to messages, use the forum please ]

Offline Offline
Newbie
*
Karma: 0
Posts: 8
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

hi,
thanks every one for helping

@ zoomkat :http://forum.arduino.cc/index.php?topic=148482.0 i saw the post its very interesting that i found out this motor driver in :
http://www.ebay.com/itm/16-Channel-12V-Relay-Shield-Module-For-Arduino-PIC-ARM-DSP-PLC-AVR-MSP430-8051/151045638471?_trksid=p2047675.m1985&_trkparms=aid%3D444000%26algo%3DSOI.CURRENT%26ao%3D1%26asc%3D13%26meid%3D8361371691757268936%26pid%3D100012%26prg%3D1014%26rk%3D1%26sd%3D150713543689%26                     (16 Channel 12V Relay Shield Module For Arduino PIC ARM DSP PLC AVR MSP430 8051)

i found in that site
"Note : this module is low level trigger" i am not good at electronics  please could anyone explain it
 
Logged

0
Offline Offline
Tesla Member
***
Karma: 141
Posts: 9541
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Sounds like the relays need a 12v operating voltage which is probably fed thru a transistor controlled by an arduino. The schematic should show the wiring (I don't have a .rar file extractor).
Logged

Consider the daffodil. And while you're doing that, I'll be over here, looking through your stuff.   smiley-cool

SW Scotland
Offline Offline
Edison Member
*
Karma: 17
Posts: 1383
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

That's not a "motor driver", it's a simple relay board which gives logic 0 or 1 outputs.

A motor driver usually takes in the PWM output of the arduino and varies the speed of the motor dependant upon the PWM duty cycle.  They are also capable of reversing he motor.

If all you need is motor ON or motor OFF then a heavy duty relay board as you've just found mighl satisfy your needs.

However, robotic controlled movement should be gradual (controlled acceleration and decceleration) otherwise you'll end up with extremely jerky movement.
Logged

Offline Offline
Newbie
*
Karma: 0
Posts: 8
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

thanks  jackrae its really informative

http://www.elechouse.com/elechouse/index.php?main_page=product_info&cPath=78&products_id=1812&zenid=2is5c8jhsaan5233u53aqp67v7

i found this "4-Channel MOSFET Switch V2" 

is it suitable for bidirectional?
Logged

0
Offline Offline
Tesla Member
***
Karma: 141
Posts: 9541
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Quote
is it suitable for bidirectional?

Per the below schematic, I don't see how you would have bidirectional control. H-bridges are usually used for bidirectional gearhead motor control.

http://www.elechouse.com/elechouse/images/product/4-Channel%20MOSFET%20Switch%20V2/switchMOSFET.pdf
Logged

Consider the daffodil. And while you're doing that, I'll be over here, looking through your stuff.   smiley-cool

Offline Offline
Newbie
*
Karma: 0
Posts: 8
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

thanks zoomakat

i think i finaly got it
"http://www.pyroelectro.com/tutorials/h_bridge_4_transistor/"

please tell me anything wrong "10A H-Bridge Motor Controller" posted above

Logged

Phoenix, Arizona USA
Offline Offline
Faraday Member
**
Karma: 40
Posts: 5570
Where's the beer?
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

please tell me anything wrong "10A H-Bridge Motor Controller" posted above

Assuming it is designed well, probably nothing (though looking at the schematic, I did notice there was nothing to prevent "shoot-thru" - and no "flyback" diodes to protect the transistors).

The main problem with it is that it is only a 10A h-bridge - whereas your motors can pull a maximum of 9.5A; that's much too close to the "edge" of the maximum - you want to give yourself a 15-25% margin if you can (so you really want something like a 12-15A h-bridge).

That said - if you can find complementary transistor pairs (NPN/PNP) with the proper power handling (whatever you do, don't try to parallel BJT transistors - it won't work) - then you could use it. You'd probably be better off building an all n-channel MOSFET design with a high-side driver IC. Just realize that designing and building h-bridges isn't as easy as some of these internet designs make it to be; but, at the relatively low-amperage levels you are looking at, at least the mosfets will be cheap (expect to blow at least a few).
Logged

I will not respond to Arduino help PM's from random forum users; if you have such a question, start a new topic thread.

Offline Offline
Newbie
*
Karma: 0
Posts: 8
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

thanks cr0sh

yes i do accept "I did notice there was nothing to prevent "shoot-thru" - and no "flyback" diodes to protect the transistors)" about it

and i found this any one could please give some review about this product
http://robokits.co.in/shop/index.php?main_page=product_info&cPath=73&products_id=334
Logged

0
Offline Offline
Shannon Member
****
Karma: 206
Posts: 12048
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

thanks cr0sh

yes i do accept "I did notice there was nothing to prevent "shoot-thru" - and no "flyback" diodes to protect the transistors)" about it

and i found this any one could please give some review about this product
http://robokits.co.in/shop/index.php?main_page=product_info&cPath=73&products_id=334

Well from the photo it uses IR7843 MOSFETs which have 3 milliohm on resistance so handling 20A for short
periods should be fine - claims to be an H-bridge so have to assume the other two MOSFETs are on the reverse side,
its not clear how the high-side switches are biased (perhaps they are p-MOSFETs on the reverse side?  Perhaps
it relies on PWM and bootstrapping circuit?)
Logged

[ I won't respond to messages, use the forum please ]

Massachusetts, USA
Offline Offline
Tesla Member
***
Karma: 208
Posts: 8822
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

and i found this any one could please give some review about this product
http://robokits.co.in/shop/index.php?main_page=product_info&cPath=73&products_id=334

Note that the manual says it can handle 10A but only for up to 10 seconds (20A for up to 1 second). For continuous use it's rated for 5A.  You can improve these numbers by adding heat sinks to the mosfets.
Logged

Send Bitcoin tips to: 1L3CTDoTgrXNA5WyF77uWqt4gUdye9mezN
Send Litecoin tips to : LVtpaq6JgJAZwvnVq3ftVeHafWkcpmuR1e

Pages: [1] 2   Go Up
Jump to: