Electric dirt kart build

From go-karts and bicycles to electric eskies and kids scooters.
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Madmax
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Real Name: Matt
Location: Melbourne

Electric dirt kart build

Post by Madmax » Fri, 27 May 2016, 15:52

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...!

Madmax
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Posts: 21
Joined: Mon, 16 May 2016, 23:52
Real Name: Matt
Location: Melbourne

Electric dirt kart build

Post by Madmax » Fri, 27 May 2016, 17:15

Image

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Madmax
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Posts: 21
Joined: Mon, 16 May 2016, 23:52
Real Name: Matt
Location: Melbourne

Electric dirt kart build

Post by Madmax » Fri, 27 May 2016, 18:42

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.


Madmax
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Posts: 21
Joined: Mon, 16 May 2016, 23:52
Real Name: Matt
Location: Melbourne

Electric dirt kart build

Post by Madmax » Fri, 27 May 2016, 21:34


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Adverse Effects
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Joined: Sat, 01 Jan 2011, 03:30
Real Name: Adverse Effects
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Electric dirt kart build

Post by Adverse Effects » Sat, 28 May 2016, 03:09

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
Last edited by Adverse Effects on Fri, 27 May 2016, 17:13, edited 1 time in total.

Madmax
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Posts: 21
Joined: Mon, 16 May 2016, 23:52
Real Name: Matt
Location: Melbourne

Electric dirt kart build

Post by Madmax » Tue, 07 Jun 2016, 22:39

Eca.pdf

schematic done and components purchased....!

I'm still waiting on M17 Intercontec motor power connectors from Deutschland...
Last edited by Madmax on Tue, 07 Jun 2016, 12:42, edited 1 time in total.

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