MAC motor cuts off after 3 seconds

[evparts]

I've looked thru 1st 5 pages of the T shooting and cant find my problem.
PROBLEM:
motor spins fine but for only for 2-3 seconds, then quits... fully release throttle, then repeat, spins up 2-3 seconds, quits.
Motor is on test stand
Motor is MAC brand,
battery is fully charged, monitored by wattmeter, no voltage drop.
same results with 36 and 48V setups
cuts out with and w/o meter attached
hall and phase test fine
throttle tests fine
no loose connections
no noises

It happens on different controllers when swapped out.

?????????????
thanks

 

[amberwolf]

The motor itself only does what the controller tells it to. So if the motor stops, it means the controller is no longer driving it, which means the controller shutdown for some reason. Finding that reason will help you fix the problem.

Did the system ever work correctly? if so, what happened between the time it did and the time it didn't?

Are you using a sensorless controller, or sensored?

If sensored, then there could be a connection failure between the motor and controller for the hall sensor signals, anywhere between the hall sensors inside the motor to the MCU inside the controller. Broken wires, bad contact-to-wire connection, etc. Could be an actual failed hall sensor, though that's less likely. Could just be the wrong phase/hall wiring combination, though that's less likely because wrong combos usually cause noise, excess current, etc.

Another possible issue is that some geared hubs spin so fast inside (ERPM) that they create so many signals the controller can't read them properly, and fails to sync, so it shuts down to prevent damage to itself or the motor. Some controllers can read fast enough to drive these, some can't. There is no easy way to tell without testing them together.

 

[evparts]

yea, i think the last one is the issue.
THe controller is not compatible with the motor.
Even though both check out fine independently.
THere is no loose connectors and like i said, the motor runs fine, no noises, for 3 seconds on a sensored controller.
NOW.. I did check motor on a senserless controller - 15A - and it ran for about 15 seconds !
SO
Do you know WHAT CONTROLLERS would be compatible with MAC motors ??

thanks

 

[Universalus]

yea, i think the last one is the issue.
THe controller is not compatible with the motor.
Even though both check out fine independently.
THere is no loose connectors and like i said, the motor runs fine, no noises, for 3 seconds on a sensored controller.
NOW.. I did check motor on a senserless controller - 15A - and it ran for about 15 seconds !
SO
Do you know WHAT CONTROLLERS would be compatible with MAC motors ??

thanks

MAC motors work fine with Infineon controllers, or any controller that can handle high ERPM. I have a controller, that I have bought with the MAC motor. It is 48V and 30A or 35A rated. Asking 30 EUR + shipping.

 

[evparts]

ok, I'll bite on the controller, but... shipping from Lithiuania ??
contact me directly