Don't buy old tecnology like an EcoSpeed motor. Three phase controlled Brushless DC motors are cheap enough now that even I could buy one. Three phase tecnology tells the motor where to go for more torque thrust.
New miniCyclone kit
what is Kv?
|New cyclone 3000w mid-drive kit?|
Motors with Planetary gear reductions
If you have a motor that you want info about, google the name with "endless-sphere" on the end.
The base of the Cyclone uses a planetary gear reduction, so that the motor turns much faster than it would without it…and what this allows it to make a lot of torque thrust power-to-weight, and improves efficiency.
You can't get 3000watts out of the Cyclone unless you use a 72volt battery. But that is way too much power any how.
- Rated speed 800Rpm
- Rated output 3000W (72V @ 40a)
- Max output 4000W
- Rated Torque 50Nm
- Max Torque 100Nm
- Rated Amp 40A
|21.9:1 overall gear reduction |
The Bafang BBSHD is a better made kit than the
Cyclone kits, but it does not have planetary gears.
DO NOT BUY CHEAP BATTERIES!!
How to program this motor controller:
|24 sprocket third chainring for serious hill climbing|
If you are having jumpy throttles, I suggest upgrading to a proper programmable controller that you can tweak the battery and phase amps ratio to something that starts smooth when you throttle up. this will save your gear box and bike drivetrain from having issues due to the tremendous amount of torque this kit has. Most probably the stock controller are configured for direct drive hub motor which requires a higher battery to phase amps ratio to turn that massive bicycle wheel without any reduction. In a mid drive you really don't need that as you already have all that reduction and the motor spinning easily from standstill.
At half speed the motor requires half the voltage, so the controller is stepping the battery voltage down by half, and thus multiplying the current by two. But if you are crawling up a hill with the motor slowed down to one quarter max speed, the amps will be multiplied by that much, which can burnout a motor's windings. So keep the motor RPMs high by using a lower gear [planetary gears really help]. A Magnetometer to read motor [phase] amps would be so much better than guessing. https://endless-sphere.com/forums/viewtopic.php?t=94735#p1387583 Having a thermometer sensor in the motor would help even more. So I will need to buy a controller with high temp shut off setting.
The more torque a motor needs to produce, the more current it will draw.