High signal brake?
- Thread starter Noamsal
- Start date
friendly1uk
1 MW
I thought low was the norm. Where the brake wire needs grounding. High would be the brake wire needing 5v.
Could be wrong..
Could be wrong..
wesnewell
100 GW
On my controller, the hi-brake line reverses motor power and brings the bike to a complete stop. It consumes power, rather than generate it like regen braking using ground to the regen or low-brake line. I ran pack voltage through mine for testing, but it may work with lower voltages. Using the hi-brake line provided enough braking power to bring the bike to a complete stop quickly without using the bikes brakes at all.
wesnewell
100 GW
That's how it works on the controller I haveNoamsal said:
wesnewell
100 GW
Not likely, but I don't know for sure. It's possible, but I doubt they are designed to do it.
If the geared motor has a clutch/freewheel, then no, it won't work because what it is essentially doing is either locking the motor's rotor in place, or actively reversing it, and either action means the rest of the wheel still continues to spin just as if you were coasting with the motor off. 
Unless there is a mechanism inside the clutch/freewheel to lock it, too, then braking the motor on a typical freewheeling-geared motor isn't going to stop the wheel itself.
But it's interesting to knwo about what that brake line might do. I'm going to have to experiment with some of my stuff here that has that label, if I can find it.
Might also be somethign for Cwah to try with his.
Unless there is a mechanism inside the clutch/freewheel to lock it, too, then braking the motor on a typical freewheeling-geared motor isn't going to stop the wheel itself.
But it's interesting to knwo about what that brake line might do. I'm going to have to experiment with some of my stuff here that has that label, if I can find it.
Might also be somethign for Cwah to try with his.
amberwolf said:If the geared motor has a clutch/freewheel, then no, it won't work because what it is essentially doing is either locking the motor's rotor in place, or actively reversing it, and either action means the rest of the wheel still continues to spin just as if you were coasting with the motor off.
Unless there is a mechanism inside the clutch/freewheel to lock it, too, then braking the motor on a typical freewheeling-geared motor isn't going to stop the wheel itself.
But it's interesting to knwo about what that brake line might do. I'm going to have to experiment with some of my stuff here that has that label, if I can find it.
Might also be somethign for Cwah to try with his.
Just as i thought so...
well i got a friend who's making himself a nice city cruiser with a 350W gearless motor, and he asked me what this wire does, so i asked here. i'll tell you what i think about it after we'll try it, if we'll try it..
John in CR
100 TW
Hi Brake is typically for scooters that have brake lights. The controller generally expects a signal of 12V all the way up to pack voltage on that line to activate ebrake/regen. On those escoots they just connect it to the brake light line, so when the brake is applied motor power is cut and if it has regen it is activated. On the ones I've had, the lowest voltage to activate was about 8V, so it probably wouldn't work running off of one of the 5V lines.
FWIW, I would never recommend running pack voltage up the the handlebars.
I do have one controller I picked up used that has an addition pair of wires with a "hi/low brake" sticker on them and a separate ebrake activation pair of wires. That gave 2 levels of regen braking when the ebrake was applied, so I wired it up to a horn button. That is a nice 30fet controller, but unfortunately of unknown manufacture.
FWIW, I would never recommend running pack voltage up the the handlebars.
I do have one controller I picked up used that has an addition pair of wires with a "hi/low brake" sticker on them and a separate ebrake activation pair of wires. That gave 2 levels of regen braking when the ebrake was applied, so I wired it up to a horn button. That is a nice 30fet controller, but unfortunately of unknown manufacture.
It's simple digital binary technology, where any bit of information has two states high (5v) or low (0v). The CPU in the controller is a 5v digital binary device.
A low voltage brake signal wire is pulled up to 5v by a resistor. The brake switch shorts it to ground, so the CPU allows power when it sees 5v and none when it sees 0v. The high voltage brake switch works the other way round. The signal wire is pulled down to 0v (low) for normal operation and the brake switch shorts it to 5v (high) to tell the cpu to cut power. The two signal wires (if you have two) are on separate inputs to the CPU, so it can use both at the same time with the opposite logic for each.
A low voltage brake signal wire is pulled up to 5v by a resistor. The brake switch shorts it to ground, so the CPU allows power when it sees 5v and none when it sees 0v. The high voltage brake switch works the other way round. The signal wire is pulled down to 0v (low) for normal operation and the brake switch shorts it to 5v (high) to tell the cpu to cut power. The two signal wires (if you have two) are on separate inputs to the CPU, so it can use both at the same time with the opposite logic for each.
Thank you thank you thank you, even though you answered my question two and a half years before I had it. I wish I saw it a couple weeks ago it's been driving me absolutely crazy. This sabvoton controller is just slightly different enough from what I am used too, to give me some real headaches.
But anyway thank you for the short simple and straightforward answer I've been Googling with no luck until now
Back to work now what's this brown wire for and why is this red one near this capacitor by itself? I wish they just labeled with abbreviations like the ones in the other circuit boards....
But anyway thank you for the short simple and straightforward answer I've been Googling with no luck until now
Back to work now what's this brown wire for and why is this red one near this capacitor by itself? I wish they just labeled with abbreviations like the ones in the other circuit boards....
