Help please, new to tricycles, considering building e-trike

[DrkAngel]

http://www.ebikes.ca/tools/simulator.html

You can adjust for weight, slope, motor, battery type, voltage and more!

Added info to previous post!

 

[DrkAngel]

What is interesting about your comment is that I looked to you as a source and a chart you made showed the 13-31T arrangement, so I just picked it.

Have not ordered parts, but would like a max MPH of 25, but 20 is OK.

20mph cruising on level w/440lb requires 400w = 36V x 12A+
25mph cruising on level w/440lb requires 700w = 36V x 20A+

 

[DrkAngel]

25mph will draw near peak watts from 750w motor.
So, calculator will be very close to accurate.

 

[k9kruiser]

http://www.ebikes.ca/tools/simulator.html

You can adjust for weight, slope, motor, battery type, voltage and more!

Added info to previous post!

I don't know how to cross reference the motor to ones listed and I still don't know the relationship between the batteries, the controller, and the motor.

You and the motor says it needs 22A. Does that mean I have to have 22AH batteries? I have also heard of people using smaller or larger controllers but I don't know how it factors. I would have assumed the controller had to match or exceed the motor/batteries.

Thanks so much for your trouble dealing with my newbie questions.

Still need to find the right freewheel sprocket for the axle...

K9Kruiser

 

[DrkAngel]

750w motor requires 36V ≥22A controller to attain full 750w output.
Larger controller will give more torque at low to middle speed, at the risk of more damaging heat and lower efficiency.

Less than full 25mph or full throttle up hills would use less than 22A - EG 12Ah for cruising 20mph.
10Ah battery would be sufficient, but possibly:
LiPo or LiFe
20min ~ 7-8miles @ 25mph ..
50min ~ 15miles @ 20mph
SLA
20min ~ 2-3miles @ 25mph
50min ~ 8miles @ 20mph

 

[k9kruiser]

750w motor requires 36V ≥22A controller to attain full 750w output.
Larger controller will give more torque at low to middle speed, at the risk of more damaging heat and lower efficiency.

Less than full 25mph or full throttle up hills would use less than 22A - EG 12Ah for cruising 20mph.
10Ah battery would be sufficient, but possibly:
LiPo or LiFe
20min ~ 7-8miles @ 25mph ..
50min ~ 15miles @ 20mph
SLA
20min ~ 2-3miles @ 25mph
50min ~ 8miles @ 20mph

There are some MightyMax SLAs that are 22A, the Enersys ones are 20A. I looked at LiPo vs. LiFePO4 as a weight and cost saver. The LiFePO4 aren't in my budget, but maybe I can afford more and compromise with LiPo. If you are saying I can actually start with 3X10 and then add 3X10, that might be a way to make it happen.

I assumed the controller was like other components, you don't want "underrated" components, but in fact, isn't it nothing more than a resistor?

To summarize, I can drive the 750w gear reduction motor that wants 27ah, with 10ah batteries?

Did the 12>31T seem like an appropriate ratio for weight and mph?

When I get a grasp of the major stuff, I will also need throttle, brake lights, turn signals, headlight, charger, I need to know what fuses should be put where, 36V>12v converter, and something I can't seem to find, bulkhead connectors.

If there are other forums for battery, wiring, etc.. please let me know.....

You are going to be my angel

 

[k9kruiser]

Progress report:

purchased what will become my battery and electronics box to mount where the cage was. ordered 750W/36v gear reduction motor, and adapter, freewheel sprocket, and chain to connect to bike. Will be building a box iron frame to attach to the top of the trike frame. It will extend further in the rear than the box to protect the box, kind of like a bumper. It will extended down to the bottom of the trike frame so it can also protect the motor.

Next....controller....can someone please suggest where to get info on them?

Thanks,
Lew