Page 1 of 1

Electric dirt kart build

Posted: Fri, 27 May 2016, 15:52
by Madmax
Hello ev fans,

I'm cutting my teeth on an ev build that is for my kids to use on our farm.

Sofar i think i have the motors and battery sorted but have nothing in the way of loom, drivetrain or chassis.....

Motors are a pair of Dunkermotoren BG75x50 which are rated at 400W continuous, with a peak of 25A @ 40V. These are very fancy BLDCs with integral controller and encoder. They have an analog input for a throttle and digital inputs for direction and interlock. Torque control mode is available, along with ramps and speed limiter.

Battery is 14s8p 18650s, Samsung cells. BMS has max 40a discharge.

the next stage is to do a wiring schematic and source a suitable kart...!

Electric dirt kart build

Posted: Fri, 27 May 2016, 17:15
by Madmax
Image

Image

Image

Image

Electric dirt kart build

Posted: Fri, 27 May 2016, 18:42
by Madmax
The loom will comprise of a relay and fuse box for ~48V motor power, and an controls box with reverse switch and connection for throttle. THe motor logic requires a separate 24v supply @~70mA which will be from a separate smaller 18650 pack. This pack will supply power to the motor logic, power relays and accelerator.

Motor control is 0-10v so a voltage divider comprising of a 7k resistor and 5k pot should do the trick (with 24v supply)

motor parameters that are adjustable are ramps (accel, decel and quick stop), maximum speed and a PI tuner.

Theres also a bunch of status outputs that will be connected to leds.


Electric dirt kart build

Posted: Fri, 27 May 2016, 21:34
by Madmax

Electric dirt kart build

Posted: Sat, 28 May 2016, 03:09
by Adverse Effects
they sound like interesting motors

as for the frame depends on on how complicated you want to make it


me i like this one

Image

Electric dirt kart build

Posted: Tue, 07 Jun 2016, 22:39
by Madmax
Eca.pdf

schematic done and components purchased....!

I'm still waiting on M17 Intercontec motor power connectors from Deutschland...