second version of my gokart

[arno9173]

hello

i rebult the first version of my gokart
http://www.diygokarts.com/vb/showthread.php?t=17754

the frame was design tu run as gas turbine powered gokart in the first version
result => a diaster i convert it to electric but the frame was too long and too heavy

the second version is built with 40 * 1.5mm steel tube , the steering system is the same

for the battery it use 8 longex deep cycle 15ah (total 48v 30ah)
i use a 48v fan who blow into the motor to keep it cold
my1020 36v 100w modified

the controller is diy with no-dissipative curent limit up to 100A and UVLO

there is a 74 tooth sproket on the axle and 11 tooth on the motor
geared for torque because i run it offroad , 35km/h

 

[landuse]

Nice! How long can you ride before recharging

 

[arno9173]

+- 1H it take 6 hour to charge

 

[Camn]

Very cool kart! How did you modify the motor?

 

[arno9173]

yes i add a 48v 200cfm fan to cool it , and i drill a few 5mm hole in the brush support for the air to better go

 

[Camn]

The brush support is inside the motor? I built a similar cart here is the post: http://www.diygokarts.com/vb/showthread.php?t=20321
I would like to mod my motor too.
Do you have the schematic for your controller? If so I would like to see it!

 

[arno9173]

yes its the fiberglass plate who the brush are mount

the power wires must be change , its 14awg (2,5mm2) on the motor , i replace it with 9awg (6mm2)
i can put 120A whithout melting

here is the schematis of the controller , it need an external 15vdc power supply like a a power resistor and a zenner diode or a dc/dc converter

sorry if my english is bad , i am french

 

[Camn]

Thanks! So the controller is 100A 48V then? What is the "ST1" connector for? And the potentiometer is the throttle controller?

My go kart has 3 35Ah 12V sealed lead acid batteries, and I don't think I have room for another one. Could I still use this with 36V?

 

[arno9173]

the st1 connector :

-1 :+ trottle and + aux psu
-2 : input trottle (0 / 15v )
-3 : gnd

you can use on 36v but you must change the voltage probe circuit as it shut down at 31v to protect the battery from over discharge

remove one 10 volt zennre diode and replace another with 7.2v zenner

dont forget a good low esr 4700µf 63v capacitor on the motor power supply

 

[Gopedude]

hello

i rebult the first version of my gokart
http://www.diygokarts.com/vb/showthread.php?t=17754

the frame was design tu run as gas turbine powered gokart in the first version
result => a diaster i convert it to electric but the frame was too long and too heavy

the second version is built with 40 * 1.5mm steel tube , the steering system is the same

for the battery it use 8 longex deep cycle 15ah (total 48v 30ah)
i use a 48v fan who blow into the motor to keep it cold
my1020 36v 100w modified

the controller is diy with no-dissipative curent limit up to 100A and UVLO

there is a 74 tooth sproket on the axle and 11 tooth on the motor
geared for torque because i run it offroad , 35km/h

Very cool!!!