Doubts on second motor AWD

[pakobike]

Hello, I am considering adding a second engine on the front wheel of my bike, but I have some doubts.

It should be a gearless hub front, because there behind a cyclone 500W.
Should work with 24 volts, you must use the same battery that the cyclone rear LiFePO4 24v 20 A that can deliver a maximum of 2C, my commute is only 12 km twice a day.

The question:
If at 40 km / h the cyclone need 35 Amps, connecting the engine that is both at the same time and same speed (40 Km/h), consumption would be divided and pull 17.5 Amps each?

I hope you will understand, I have trouble with language.


Greetings

 

[dogman dan]

I think you will pull a lot of amps running both motors at once. There would be some reduced strain while cruising mabye? But on a steep hill or at starts, I think you would be doubling the pull on the battery if both motors ran at once. Don't know any direct drive motors worth running at 24v anyway. They'd be real slow, most of em.

 

[Rassy]

Hi Pakobike.

I am a real fan of multi-motor setups and have played around with several different combinations of bikes and trikes with one and two wheel trailers and one, two, or three motors.

However, if I understand you correctly you intend to use a single battery and controller to run the two motors. And what you mention about the available amperage being split by the two motors is correct. The result of this type of setup would be potentially less startup torque and hill climbing capability. I have always used a separate controller for each motor being used. In fact, for brushless motors, there is a phase issue that prohibits running two motors from one controller.

Also, I have always used identical motors in my multi-motor setups, with one exception, where I used a second throttle for the second motor.

Whatever you end up trying, good luck, and post how it works out.

 

[huskydave]

In my opinion the money spent on the extra motor/controller is better spent on batteries. If a bike has all that extra weight it will not handle very well. If I was you I would just upgrade the batteries/controller or build a second bike.

 

[pakobike]

The idea is to use a front hub motor controller with its own independent motor cyclone that has built within its driver and the same speed for both engines, with the ability to connect one or the other or both at once.
According ebikes.ca simulator, a brushless clyte 404 to 24v with a 20A controller produces 300w of power and a wheel 26 ", generates a speed of 43 km / h.
If the front of the engine is limited to 20A to 2C that the rest can deliver the battery will be available for the rear engine.
The increased weight on the bike would be only about 6 kilograms (engine, driver and front cables), the engines would work closer to the area and even less heat.
Now with the Cyclone, on a slope of 6%, with a speed of 19 km / h, at the same speed with both engines should distribute the available amps to generate each half of the power required to climb, but also losses and perhaps increase the amps are too much for my battery.

 

[dnmun]

i wish someone would get this spammer outa here.

rather than waste money and time on another motor/controller and wiring, you should just buy more batteries, nobody really runs 24V anymore do they? add another 36V battery on top. someone else just had a thread on that. putting a ping on top of a hightekbike pack.

 

[pakobike]

Hello dnmun not understand, my cyclone operates at 24v and I do not want overvolted.
So they put a 36v battery?