Motor Driver circuit 24v ,16A-20A

ajit.nayak87

Dear all,

I am looking For Dc motor Driver circuit which can handle 24v 16A-20A. with back emf and over voltage protections. Can someone here help me out building it

We can use DPDT relay/spdt relay or Motor Driver ICs Must have protection and compatible with Arduino boards.

it must have feature like
dir change
Pwm
on/off the signal

LoopyByteloose

I suspect at 16-20 amps, DPDT relays would be both expensive and failure prone. It looks like a job for Power MOSfets in an H-bridge.

As far as wanting a complete schematic....
This size of motor controller is available commercially, but the manufacturers really aren't going to post schematics that allow you to build your own. It is likely that the best you might do is to locate a textbook that explains how to design something appropriate. Even then, the textbooks may not be up-to-date with the latest in H-bridge MOSfets.

Help with the design?
Try to locate your H-bridge MOSfets first and foremost; then deal with the circuity to control them. The general approach is to focus first on the power switching components and work from the top-down.

Also, consider what the power requirements of a dead stall might be. It the motor comes against up against an object it can't move, what do you expect the circuitry to do.

And................. why is Arduino compatiblity important? Propellers are 3.3 volt logic. Arduino's are 5.0 volt logic. (HINT- this is not an Arduino Forum.)

LoopyByteloose

You might read the following thread to see whats involved.

http://forums.parallax.com/showthread.php/142009-Building-a-proper-h-bridge-from-scratch


And 20 amps @ 24 volts = 480 watts of power. At 746 watts per horsepower, you are expecting to have about 2/3 HP.

Parallax has a good 1/2 HP H-bridge that is limited to 16 volts peak. the HB-25 and it is small, light and compact. It includes fusing and cooling fan... a lot of details that DIY might have difficulty with building.

http://www.parallax.com/product/29144

garyg

ajit
24v at 16 to 20 amps is a very heavy duty motor.
What are you attempting to do?
I usually measure motor current with motor running.
If 16 or 20 amps is Locked Rotor current, Your motors will more than likely not normally achieve that under normal running situations.
When I was involved with industrial motor controls, I would limit max current by either fuse or a programmable limit in the industrial controller.
I'm thinking that even if you run your motors at reduced voltage such as if you use HB25 Parallax controller, the controller will be able to
limit motor current so as not to damage the controller or motor.

Just a thought.