Troubleshooting 24v Brushed DC Speed Controller - Page 1
Forum section: electronics / beginners

author: electromateria
author_rank: Regular Contributor
timestamp: July 11, 2022, 06:34:23 pm
content: Not sure what the problem is. Seems to me it should be simple to use and I'm scratching my head at this point.I've confirmed I'm sending 24vdc into the controller, when I turn the twist throttle it doesn't send any output voltage to the motor. I used the multimeter to check what kind of voltage is hitting the throttle and it says .7mv, I believe it's supposed to be 5v (I could be wrong on this).Any ideas?PS - all I have setup is 1) battery to controller 2) controller to throttle 3) throttle to motor

author: andy3055
author_rank: Super Contributor
timestamp: July 11, 2022, 07:22:24 pm
content: Just a guess. It may need the load to be connected.

author: floobydust
author_rank: Super Contributor
timestamp: July 11, 2022, 07:37:00 pm
content: YIYUNYK31Cscooter motor controller requires key switch as well.

author: electromateria
author_rank: Regular Contributor
timestamp: July 11, 2022, 07:57:10 pm
content: Quote from: floobydust on July 11, 2022, 07:37:00 pmThanks, this is the issue. Confirmed it's getting the 24v. My throttle doesn't have a key. What's the cleanest way to do a bypass? I thought maybe to short it but its not working.

author: floobydust
author_rank: Super Contributor
timestamp: July 11, 2022, 08:38:18 pm
content: Short the red/blue keylock switch pins on the connector in order to steal the scooter. mods etc.https://skoda.daves.cz/YK31C_mod_tuning

author: electromateria
author_rank: Regular Contributor
timestamp: July 12, 2022, 03:18:16 am
content: Ok I rewired things and got 5v to the throttle now it's workingWith speed controller / full throttle:https://streamable.com/m6lvgpJust wired straight to batteries:https://streamable.com/kr5yetWhy is there so much power loss from the ESC is that normal?

author: electromateria
author_rank: Regular Contributor
timestamp: July 12, 2022, 04:35:22 pm
content: Would love if someone could explain this:https://streamable.com/2ceyq3WTH is that lol1v output to the motor and it drops down to zero after a few seconds

author: LooseJunkHater
author_rank: Frequent Contributor
timestamp: July 15, 2022, 05:37:33 pm
content: Quote from: electromateria on July 12, 2022, 04:35:22 pmCheck to see what voltage the batteries are dropping to during operation. That looks like a very high-power motor for such a small ESC and batteries. Further, since the output signal is PWM with likely a high switching frequency, your multimeter is likely not measuring the voltage correctly. You'd need a o-scope in that case.Edit:Also if that's a 120/240v motor and you're only running it on 24v, that would explain the slow speed.

author: electromateria
author_rank: Regular Contributor
timestamp: July 18, 2022, 02:03:22 am
content: Quote from: LooseJunkHater on July 15, 2022, 05:37:33 pmTurns out the throttle was junk. Thanks Amazon for wasting 5-6 hours of my time, pleasure doing business lolSome kind of issue either with the hall effect sensor or the wiring. When I'd check the hall effect sensor output after moving the throttle the resistance never changed across any of the pins.Returned it and got something "better" (more expensive, more features). Gonna test that tonight.. fingers crossed.