BPM 36V 500W 26(10)

[rakos]

Hi,
I bought an ebike in pieces. It came with a BPM 36V 500W 26(10). The motor has 3 wires so I assume it is 3 phase. The controller that came with it (Yiyun YK31C) only has 2 wires (Yellow, Blue) going to motor. Can I use this controller? If not, what would be the proper controller? Thanks, John

 

[vfr400]

No, you need a sensorless or dual mode ebike controller. Code 10 is quite fast at 310 rpm, which is 23 mph in a 26" wheel, It will give good power up to around 20 mph (10% faster when the battery is fully charged).

22 amps is about about right for normal use with a 36v battery, or you can go up to 30A if you're heavy and have steep hills. With those sort of currents, you need a controller with current control, otherwise you get an uncomfortable sudden start up each time you pull away from a standstill.

If it's a front motor, you need a bike with steel forks and I wouldn't go higher than 22 amps because you won't get enough traction. At 30 amps, you'll wear out the tyre in a month because of the wheel-spin. It is feasible to install it in other forks, but you need to be very careful with the installation. Ask again if you plan to do that.

Here's a suitable controller. You'll need at least an LCD and a speed sensor to go with it, so total cost will be about £80.

T09P 36V/48V 500W 22A KT Square Wave Controller Brushless Controller for Ebike FT-09 48V500W Torque Simulation Square Wave Controller Brushless Controller for Ebike [T09P KT 9mosfers controller] - $22.00 : Zen Cart!, The Art of E-commerce

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www.topbikekit.com

If you're not bothered about power, you can run it with any typical 15 amp sensorless or dual-mode controller. You don't need the current control with only 15A, though it's still nice. Some of the cheaper controllers have an adjustable ramp in the start up power. I'd recommend a Brainpower controller with S866 LCD that you can get from Ebaly, Amazon and the Chinese reseller websites for about £40. If you just want to see the motor work, you can get controllers for as low as £15, but you don't get a very good riding experience with them compared to the above two.

One final point: When deciding how much current to run, you have to think about how much current batteries can provide. Most cheapo batteries can do 15A. by the time you get to 22 amps, you'll be looking at mid-priced batteries with 25A capability. At 30A, you'll be looking for a specific high current battery, which will be at the expensive end of the price range. If you buy an under-specified battery, you'll be looking to buy another one in the near future to replace the first dead one.

 

[rakos]

No, you need a sensorless or dual mode ebike controller. Code 10 is quite fast at 310 rpm, which is 23 mph in a 26" wheel, It will give good power up to around 20 mph (10% faster when the battery is fully charged).

22 amps is about about right for normal use with a 36v battery, or you can go up to 30A if you're heavy and have steep hills. With those sort of currents, you need a controller with current control, otherwise you get an uncomfortable sudden start up each time you pull away from a standstill.

If it's a front motor, you need a bike with steel forks and I wouldn't go higher than 22 amps because you won't get enough traction. At 30 amps, you'll wear out the tyre in a month because of the wheel-spin. It is feasible to install it in other forks, but you need to be very careful with the installation. Ask again if you plan to do that.

Here's a suitable controller. You'll need at least an LCD and a speed sensor to go with it, so total cost will be about £80.

T09P 36V/48V 500W 22A KT Square Wave Controller Brushless Controller for Ebike FT-09 48V500W Torque Simulation Square Wave Controller Brushless Controller for Ebike [T09P KT 9mosfers controller] - $22.00 : Zen Cart!, The Art of E-commerce

ebike controller,electric bike controller,Sine Wave Controller,24v,36v,48v controller,24v controller,36v controller,48v controller,Torque Simulation Square Wave Controller,controller with display,controller with meter,6 mosfets controller,9 mosfets controller,12 mosfets controller,controller for...

www.topbikekit.com

If you're not bothered about power, you can run it with any typical 15 amp sensorless or dual-mode controller. You don't need the current control with only 15A, though it's still nice. Some of the cheaper controllers have an adjustable ramp in the start up power. I'd recommend a Brainpower controller with S866 LCD that you can get from Ebaly, Amazon and the Chinese reseller websites for about £40. If you just want to see the motor work, you can get controllers for as low as £15, but you don't get a very good riding experience with them compared to the above two.

One final point: When deciding how much current to run, you have to think about how much current batteries can provide. Most cheapo batteries can do 15A. by the time you get to 22 amps, you'll be looking at mid-priced batteries with 25A capability. At 30A, you'll be looking for a specific high current battery, which will be at the expensive end of the price range. If you buy an under-specified battery, you'll be looking to buy another one in the near future to replace the first dead one.

Thanks for the quick reply. The cheapest seems to be from China - Aliexpress: the 36/48v 500W is $44.

Ebike Controller 24V 36V 48V 250W 350W 500W 750W 1000W 1500W Brushless 6 9 12 18 Mosfet KT Controller Electric bike Accessorice - AliExpress 18

Smarter Shopping, Better Living! Aliexpress.com

www.aliexpress.com

I assume I need brushless. I also assume the Hall controller is the sensor on my pedal crank (which I have). Thanks, John

 

[vfr400]

I assume I need brushless. I also assume the Hall controller is the sensor on my pedal crank (which I have). Thanks, John

Hall sensors are in the motor. The controller uses them to determine the position of the motor for accurate pulse timing.

You need a brushless controller. It's a three-phase, brushless sensorless motor 310 rpm at 36v.

The thing behind your chainwheel is the pedal sensor. Just about all ebike controllers have a connector for it, and they also have a connector for an independent throttle. Some controllers can be set to have the throttle dependent on pedlling and/or limited to 6km/h to satisfy UK law. Independent throttles are allowed on ebikes sold before 2016.

 

[rakos]

Great to have such a knowledgeable person! One more question: I have a controller from another project: LY-48V1000W. Could I use it to run my 36V500W motor if I use a 36V battery? ps are you in the UK? are ebikes popular there? tx

 

[vfr400]

Great to have such a knowledgeable person! One more question: I have a controller from another project: LY-48V1000W. Could I use it to run my 36V500W motor if I use a 36V battery? ps are you in the UK? are ebikes popular there? tx

You most likely can't run that controller at 36v. On this forum, most of us are in UK.