Help with Sabvoton slide regen? 20$ for fix

[BionicBlitz]

first one to provide a working soloution will earn 20$

ive looked all across google and fourms, attempted to contact manufacturers and sellers.. obviously no luck

I have a sabvoton svmc96120 and can not figure out how to get the regen to work... i think they call it (e-brake)

first off i know that regen wont work if the battery voltage is anywhere near full. and yes i activated it in the app.
i can get the "regen" to activate, the one that slows you down once you let off the throttle

but i would really love to have the slide regen working on my bike. its a 130lb beast with a 3+kwh battery, so the disc brakes can get glowing pretty quick on any kind of hill

as for wires theres the 3wire regen throttle connector, (brake 0v) in a connector with the (reverse 0v) wire, and a single purple (brake 12v) wire with a connector on the end.. i tried putting them to B- but didnt do anything didnt even cut off the motor. not brave enough to put it to B+ and risk frying it for good.

also im not sure if this has anything to do with it but when i let off the throttle i can feel the motor is still on... doesnt put out much power maybe 100w but you cant hear it coasting along

i know im not the only one on having this issue so any help would be quite appreciated.. Thanks for your time

 

[amberwolf]

i can get the "regen" to activate, the one that slows you down once you let off the throttle

but i would really love to have the slide regen working on my bike.

"slide regen" is probably "slip regen", and that's what you say you already have working above, where you let off throttle and it slows you down.

what that is doing is actively keeping your system from exceeding the demand of the throttle for speed or torque (however it is setup in your case), so when the demand of the throttle position drops below what the system was already supplying, the system reverses teh motor torque, which brakes it.

usually those are setup so if you just let the throttle snap off you will continue to coast, but if you roll the throttle off, it will brake as you go, down to zero (some may not brake when *at* zero).

as for wires theres the 3wire regen throttle connector, (brake 0v) in a connector with the (reverse 0v) wire, and a single purple (brake 12v) wire with a connector on the end.. i tried putting them to B- but didnt do anything didnt even cut off the motor.

it is possible that it is setup like some others are, where you must first brake with the ebrake lever, usually connected from a specific brake signal input that is just off/on, and then you manipulate your throttle to control braking amount.

some controllers have two different brake inputs, that do different things.

the brake low input requires grounding it to activate it. the brake high input requires putting a voltage on it to activate it, probalby 12v, so you can wire it to your brake light on scooters and motorcycles that use a positive voltage to turn on their brake lights (some ground their brake lights to turn them on).

whcih input does which thing you'd have to determine experimetnally if your manual does not say (assumign there is a manual). sometimes the brake high input turns on regen braking, and the brake low input only disables teh motor. sometimes its' the other way around.

if you actually have a completely separate throttle input for braking, then you'd need a separate throttle to do the braking with. whether that works by itself, or requires you first activate the brake lever switch input and *then* use the separate throttle, you'd have to determine experimentally.

there are a lot of shapes of throttles, including some that are lever-like, and may even be some levers that have analog output instead of switch output, these days. or you can use a cable-operated throttle unit and run a cable from an unused regular brake lever or ebrake lever to that, to control the brake throttle (this may require something like a travel-agent pulley on the cable to give the right pull ratio to get the full throttle range, unless the controller can be adjusted to match the range you get out of what you have).

not brave enough to put it to B+ and risk frying it for good.

B+ would probably destroy the controller, on an input designed for lower voltages. some of them do have brake inputs rated for full battery voltage, but you would want to be completely sure of that first.

 

[BionicBlitz]

yea, i think i played around with most of that... just cant get the variable regen to actually activate or even cutoff power to the motor :/ not sure if its a software issue or im doing something wrong with my wires...

Anyone know how to trigger the (brake 0v) and (Brake 12v) ive been told people fry the controller by hooking it to B+ so i dont think thats it

come to thinknof it, i can't get flux weakening to work either. it shows 'on' on the app but i feel no difference at 50a. anyone got any suggestions or guesses?

 

[Jmorris]

yea, i think i played around with most of that... just cant get the variable regen to actually activate or even cutoff power to the motor :/ not sure if its a software issue or im doing something wrong with my wires...

Anyone know how to trigger the (brake 0v) and (Brake 12v) ive been told people fry the controller by hooking it to B+ so i dont think thats it

come to thinknof it, i can't get flux weakening to work either. it shows 'on' on the app but i feel no difference at 50a. anyone got any suggestions or guesses?

I am having the exact same issue with SVMC 72150,