http://www.ebay.co.uk/itm/Beijixing-BJX18-500-Watt-36-Volt-Kit-Speed-Controller-Electric-Scooter-E-Bike-/192058729838?hash=item2cb797a56e:g:gqwAAOSw44BYMzf0

 

 

Anyone know if this would work with 250 geared brushless motor with wires?

Nope, tis for a brushed motor only two motor wires. You need one with at least 3 and if sensored one with 8 or 9 if you need one with internal speed sensor.

If you want a bit more power (torque), you can solder 25% of the length of the shunt in your existing one, that's aseeming that it works now.

Ok thanks, no I need one. Looking for cheapest I could get my hands on preferably in uk. Do you know any? thanks

Any gd?

 

http://www.ebay.co.uk/itm/power-controller-for-electric-bike-/162334423599?hash=item25cbe2ba2f:g:VUsAAOSwImRYYT4Q

Again looks like a brushed controller only 2 bullet connectors for the motor.,

http://www.ebay.co.uk/itm/Brushless-Controller-For-E-bike-Scooter-with-without-Hall-Sensor-36V-48V-350W-UK-/282243870914?hash=item41b70bb0c2:g:DhsAAOSwA3dYHFPM

 

This one but looks like lcd non compatible and connectors may not be the same. The lit is in Chinese so unable to read but supplier may give some insight.

http://www.ebay.co.uk/itm/Beijixing-BJX18-500-Watt-36-Volt-Kit-Speed-Controller-Electric-Scooter-E-Bike-/192058729838?hash=item2cb797a56e:g:gqwAAOSw44BYMzf0

 

 

Anyone know if this would work with 250 geared brushless motor with wires?

 

You need to tell us exactly what you have - battery, motor,

Nice so will that work 250 watt motor brushless? It says 350 or does it not matter. No bothered about lcd, I can also rewire handy with a soldering iron.

 

I have 36v 13ah battery

Motor is 36v 250 brushless geared.

 

thanks.

Nice so will that work 250 watt motor brushless? It says 350 or does it not matter. No bothered about lcd, I can also rewire handy with a soldering iron.

 

I have 36v 13ah battery

Motor is 36v 250 brushless geared.

 

thanks.

That's not quite enough. Which motor is it? Which connector/s does it have on the cable? Which battery is it exactly? Show us photos if you can't answer those questions. These points are important if you want a controller that suits your battery and your motor.

Quick question, can I use one of these as booster battery. Bought it one 2 years old never used. Seem to still work.

 

http://www.ebay.co.uk/itm/68800MAH-Portable-Diesel-Car-Jump-Start-Pack-Booster-Charger-Battery-Power-Bank-/391546342585?hash=item5b29fb0cb9:g:z6AAAOSwi0RXxUgW

 

If so what controller would I need? 36v battery going to 250w motor

BFS WXH three wire connection, the battery is off a a2b metro

OK, you need a sensorless controller with a maximum current in the range 14A to 22A.

 

Can you give us all the writing on tht motor? I have some concerns.

 

You can't use that battery as a booster.

Ok thanks, oh no... what is it? it came up cheap on eBay and I bought. Is it a Free-hub gear set or freewheel? I think it's a

Copy of Bafang SWXH 36v, 250w by trio

Here is ad;

http://www.ebay.co.uk/itm/391648704561?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Should I just get this one from panda with LCD, I'm guessing I don't need a hall sensor.

http://www.pandaebikes.com/product/36v-250w-electric-bicycle-ebike-brushless-motor-controller-hall-sensor-control/

Which one?

https://www.amazon.co.uk/gp/product/B01EV37D7Y/ref=ox_sc_act_title_2?ie=UTF8&psc=1&smid=A3JOIFMN3ONQR9

 

will this on be faster? 22a

https://www.amazon.co.uk/gp/product/B01H56INEQ/ref=ox_sc_act_title_1?ie=UTF8&psc=1&smid=A6XQPVRXUZ1KA

Ok thanks, oh no... what is it? it came up cheap on eBay and I bought. Is it a Free-hub gear set or freewheel? I think it's a

Copy of Bafang SWXH 36v, 250w by trio

Here is ad;

http://www.ebay.co.uk/itm/391648704561?_trksid=p2060353.m2749.l2649&ssPageName=STRK:MEBIDX:IT

You didn't give all the writing. What's underneath what you gave?

I don't have it yet, I will report when I get it. I think this is it.

http://www.ebike-solutions.com/de/shop/motoren/motoren-bis-250w/bafang-swxh-hinterradmotor-36v-250w.html

 

What about controller should I go for the second one I posted?

 

Cheers

You need a controller for sensorless motors.

 

There's an important thing you need to consider. If you want to use a pedal sensor for pedal assist, there's basically 3 options:

 

1. No LED/LCD control panel. Cheaper, but when you pedal, you only get maximum power, which is not always what you want.

2. LED control panel. You get 3 levels of pedal assist -low, medium and high.

3 LCD control panel. More expensive but you get 5 levels of assist plus all the cycle computer functions plus a lot more.

 

Your motor is rated at 250w, which is 7 amps continuous. You can go as high as 22 amps with sensible use. You can't turn it up to maximum and then go and climb a one mile hill. It would be OK for a short steep hill or continuous high speed . Motors are much happier at high speed than low speed.

 

There's three sensorless controllers that I know and can recommend:

 

S06P from BMSBattery. You have to buy one of their LCDs too, and probably a good idea to buy the throttle, PAS and wheel-speed sensor to go with it.

 

S09P is the same but 22A instead of 15A. It's a bit bigger too.

 

This one from aliexpress is 14 amps but relatively cheap. It's very versatile and works with all motors. It comes with an LCD.

https://www.aliexpress.com/item/24v36v48v250w350w-controller-LCD-display-manual-control-panel-dashboard-for-electric-scooter-ebike-moped-mtb-tricycle-dualmode/32464390144.html?spm=2114.13010608.0.0.r144au

 

I would wait until you have the motor before ordering a controller in case it turns out that it's sensored.

D8, do you know if the controller you've linked to above on AliExpress features current or speed control?

Pretty sure it's speed control. It's very smooth though and has very good low-speed motor control (sensored).

Final got the wheel the writing is BFSWXH36V250w185R

28 1203241479

 

Fits on the bike and when I touch the hall wires I get resistance when I turn the wheel the opposite way that a go sign sign. Is there in where i can take to get tested before I buy the controller near bristol? . Any members with sensor less brushless controller, don't mind a drive.

Thats a 185 rpm motor for 28" wheel. the size of the wheel doesn't matter - it only effects the speed and torque. It's not going to go much past 15 mph even when unrestricted, but it should be OK on the hills.

 

These motors are pretty reliable electrically. The only test you need to do is spin it in each direction without the wires touching. one way it should spin nearly like a normal bike wheel. The other way, you should feel some resistance but it should be reasonably quiet when you spin it.

 

It's a genuine Bafang motor. Trio must be the name of the bike it was on.

Oh really, not ideal but I do only weigh about 56 kg and the bike is really light and I could reach 20 quite quickly. Anyway picked up a controller early morning cheap from bath. No joy, no instruction but the guy gave me a link where he says he bought.

 

https://www.amazon.co.uk/gp/product/B01I6C6HKK/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

 

 

Thick black which is negative I'm certain.

Now Thick red positive: Problem, If I connect this to the battery I get a spark fly. Does that mean it’s also connected to negative?

If I connect thin red to battery positive it seems to work. I get about 5v coming out of the 3 throttle wire. I get about 12v from the small hall wires which my motor does not have. I get full power coming out of the thick red…? I can not get the motor running. I have the throttle connect and the thick three hall wires connected to the motor nothing. Is there something I'm missing here. Is there a way to bypass the throttle to rule that out. Do I need to do anything with thick red? Opened it and took a pic but don’t know what I’m looking at.

 

I hope you didn't pay a lot for that. It's normal to get sparks when you join the battery because there's that big capacitor across the battery wires.

 

Thick red and thick black = battery

Thick yellow, blue and green = motor

Thin red is = ignition (goes through switch to thick red)

Red, green and black = throttle (make sure your throttle has the same sequence before connecting)

Black and white = brake switch

Thin green = probably battery voltage for meter/LEDs

Thin whites = probably speed restricted when joined.

Yellow = probably alternative for high (5v) brake switches

 

185 rpm is 185 rpm at 36v. If you were 1 kg, it wouldn't spin any faster. Fully charged, your battery might hold 41v for a bit, so the absolute maximum the motor will go is 185 x 41/36 rpm = 210 rpm.

 

That equates to a speed of 16.87 mph in a 28" wheel. Power will ramp down rapidly from something like 13 mph.

 

When your battery is run down, those speeds will be 75%, so power will drop down from 10 mph and max speed will be 12 mph.