Hello! I have been working on a project for a while and moving into the final steps I've realized that the new motors are going to need a lot more than a little h brige that can support no more than 25 watts. Each motor has a stall current of 6.6 amps and I plan to run them at 7.2 volts. There are 6 motors. The chassis is 6wd and I want each side to be its own channel so all 3 spin at the same time In the Same direction.
Here's where I'm lost... I need some way to control these motors because no shield or board seems to support more than 25 watts. If anyone could help my find a 300w board or technique to control 300w worth of motors bi directional it would be greatly appreciated. Thanks
Noah
Here is an inexpensive relay board rated up to 10A for either AC or DC.
the first is a 4 channel. You would need 2 of the 4 channel. There are a lot of boards out there. Or you can just buy the 5VDC Relays.
4 channel 5 vdc relay
This is a 8 Channel
good luck
NovaJett:
The chassis is 6wd and I want each side to be its own channel so all 3 spin at the same time In the Same direction.
Check the links I added to this post.
You might be able to use one of the ESCs per side. You would probably be better off with a H-bridge or ESC for each motor. When motors share a h-bridge, when one motor encounters a higher than normal load, it can rob power from the other motors.
Which motors do you plan to use? Do you have a link?
H bridge will not work as it will max out at 25 watts. I require more than 10 times that. The relay boards do not support enough amps. Each motor has a stall current of 6.6 amps. So all 6 will pull about 40 amps. I was going to get a battery that is capable of discharging 108 amps. Will it always discharge 108 amps or will it only discharge what is pulled by the motors? Also anyone else that could help with the motor controlling problem I would really appreciate it :).
DuaneDegn:
Which motors do you plan to use? Do you have a link?
When someone asks a question, don't answer it via PM. Answer in the forum so exchanges can benefit people with similar questions.
NovaJett:
This is the motor Pololu - 34:1 Metal Gearmotor 25Dx52L mm HP 6V and like I said I'd like to power 2 channels of 3.
What does "power 2 channels of 3" mean?
NovaJett:
H bridge will not work as it will max out at 25 watts. I require more than 10 times that.
Do you mean the h-bridge you have won't work? There are lots of possible h-bridge solutions for your motors. The link I provided earlier will lead you to a couple and there are lots of possible h-bridges on Pololu.
NovaJett:
I was going to get a battery that is capable of discharging 108 amps. Will it always discharge 108 amps or will it only discharge what is pulled by the motors?
The battery will only discharge what the motors pull from it. You could have a battery capable of delivering thousands of amps and use it run a tiny motor.
Make sure and read my earlier comment about using separate h-bridges.