Although I have a degree in engineering, it's mechanical engineering. In addition, I have been developing software since I graduated, so please excuse my obvious ignorance about electronics hardware.

I need to connect the control board to the small circular board and/or connectors on top of the motor, or, perhaps, the motor casing?! I'd like to avoid another 3 month wait like the one which resulted from previously having shorted them out :-). If anyone could help by explaining what the various thing are, I would be very grateful!

The motor is from a sea scooter, which is powered by a 24V lead-acid battery. So, 24V DC into the board and 24V out. There are a couple of magnetic relays on the board, which control the following: one controls stop/go, while the other takes it from half to full speed. That's about as much as I can give :-(

Many thanks in advance, even if it's just a link to a page where I can inform myself.

NTC required? Brushed Motor motor board top of control board Control Board

bottom old board enter image description here


M+ and M- are the only ones that go to the motor tabs. Either way is fine; Just changes assigned direction of rotation. Doesn't look like anything else goes to the motor.

That PCB on the motor doesn't look like it does very much. Just noise supression measures it looks like. That wire on the motor can probably be ignored if you want. It looks like it is just a midpoint connection between the noise filtering caps so you could connect it to the case or chassis if you want.

  • \$\begingroup\$ That is reassuring, am I right in thinking that the NTC connector is for some sort of heat sensor on the motor, can you see where that shouod be connected...I wcouldn't see anything that jumped out. Thnaks again for your help :-) \$\endgroup\$ – hicklehoff Feb 25 at 18:21
  • \$\begingroup\$ @hicklehoff Your motor probably doesn't have an NTC which means you can only really put it on the case. \$\endgroup\$ – DKNguyen Feb 25 at 21:29
  • \$\begingroup\$ The black component on the motor PCB may be a diode. This would mean that the manufacturer intended it to go only in one direction and you should not reverse the motor leads. \$\endgroup\$ – ScienceGeyser Feb 25 at 21:58
  • \$\begingroup\$ @ScienceGeyser True, but I ASSUMED it was a bidirectional TVS diode which would allow rotation in both directions. If it is a unidirectional diode then you are correct. \$\endgroup\$ – DKNguyen Feb 25 at 21:59
  • \$\begingroup\$ I think you're right, it should only go one way, or things might get sucked into the prop Thank you for looking, most grateful. M+ to Motor +, M- To Motor -,Ground to the Motor casing and The wire on the small motor board to NTC for neatness or does that make no sense? \$\endgroup\$ – hicklehoff Feb 25 at 22:42

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.