go faster with 500W 48V

[soso2565]

We have buy a escooter
full 500W
48V - 20AH

the bike do is 32 KM/H but it will be nice to go a little faster

if the motor maxes out at 430 rpm what limit that ? the controller or some device inside the motor ?

I have open the controller and there a capacitor of 63V can I change it for a bigger Voltage one? is that will help ?
on the motor there 8 wires
3 bigger wires ( blue , green , yellow )
5 small wires

when I meter the big wires between them there no voltage full throttle or zero throttle
when I mesure between ground and blue or yellow or green I have same reading
0 throttle full voltage 48V
Voltage decrease about 2 V every step ( speed ) on throttle and reach 32V when full speed

what are the 5 small wires are doing ?

thank you every one

 

[adrian_sm]

if the motor maxes out at 430 rpm what limit that ? the controller or some device inside the motor ?

The max speed can be limitted by the controller, but is most like limited by the battery voltage.

I have open the controller and there a capacitor of 63V can I change it for a bigger Voltage one? is that will help ?

It will only help if you plan on running the bike at a higher battery voltage. You can swap them out for 100V caps of equivalent capacity, and give it a run, but it is likely some other parts of the circuitry will also need to be modified for the higher voltage. So it might be easier to just buy another controller that is rated for a higher voltage.

Something like this would do the trick for 72V battery setup.
72V/1500W brushless controller for E - bike & scooter

on the motor there 8 wires
3 bigger wires ( blue , green , yellow )
5 small wires

what are the 5 small wires are doing ?

The 3 big wires are the phase wires for the motor. They carry the main current that excites the electromagnets in the motor.
The 5 small wires are for the hall sensors in the motor. This helps the controller send the current to the correct phase, at the correct time to make the motor turn. 2 of the 5 wires are 0V and 5V, the rest are the sensor output.

Good luck,
Adrian

 

[dogman dan]

Pretty likely that the scooter motor is wound to go a bit slower, since that makes em run cooler, and go further on a charge. Most likely you have a 15 amp 48v controller. Changing the controller to one with more amps would make it get going faster, but not change top speed all that much.

And if you are using lead batteries, that most likely costs you a few kph too. The batteries can only put out so much, and then the voltage drops a few volts.

So the most likely solution to succed would be to get a bigger controller, like a 30-40 amp 72v model. Figuring out which color wire goes where on the new controller will be no fun at all. Then you spend even more money on good high discharge lithium batteries for the new controller.

So unfortunately the answer may be to throw a huge amount of money at it.

Some controllers have a speed supressor loop you could disconnect, but it doesn't sound like you have one. It would be a couple of single wires coming out of the controller, and plugged into each other. You might open up the controller and see if anything like that seems to be inside. some kind of jumper wire in there.

 

[soso2565]

Is there any way to reprogram controller to add 4-5 KM/H ?

I understand the battery and bigger controller thing but there no controller who are " open source " ? controller that can be modify either by usb connection or other way ?

Thank you

 

[soso2565]

yes there a pair of wires just beside the throttle when the connect is connect the bike go at 20KM/H when disconnect it goes at 30KM/H

for now it is disconnect

 

[soso2565]

one thing I just realize

when I run the bike I can go to 30-32 KM/H which is ok
when the bike is on it's stand full throttle it still go at 32KM/h

I can understand the controller say don't go over 32 but where the 32 information is coming from ? the wheel?

is there a sensor there which give the # of rotation of the wheel??

 

[oldhaq]

What size are your tyres?
If they are 16" you may only gain a little more speed even if your controller is limiting rpm and you replace it with another controller.
If you get a ecrazyman controller, get it programmed with 120% speed #2 setting.
What type of motor you got? 430rpm sounds like a HBS48 type.
For the highest rpm increase you could change the motor's internal wiring to delta, although it's noisier.
Probably the first thing to do though is change the controller, and look for a fatter tyre.
Post some pictures of your parts.

 

[soso2565]

not sure what type of motor I have I can take pictures later today and post them here

for the RPM thing I have read that on the board here

but I know the wheel turn the same speed on the stand or with 1 person onboard so there really something who limiting the RPM of that wheel

 

[soso2565]

cant take picture right now but i remember on the controller box there no info at all , there a small sticker say" 48V(1)"

I will try to take picture of the wheel and motor

 

[soso2565]

here 3 pictures ...will try to take better one later

 

[dogman dan]

My guess is that since you have already diabled the speed limiter, you are at close to top speed for the wheel at that voltage. The combination of winding count and diameter of the tire and the voltage have a mathematical maximum speed. You are nearly at that speed now. So only changing motors to a faster winding, or changing controller and battery to a higher voltage is going to get you much faster... A better battery would help some, but at most, you'd have only a few kph faster. A better battery of the same voltage will get you better performance even if the speed increase is not so much. Worth it for several reasons.

There is another possibility called delta wye that I don't understand. But I do think it can increase the speed of a motor. It's something to do with how the wires are hooked up to the windings inside the motor.

Reading again, I see what you mean about some other thing still limiting the speed. There may be an absolute max speed built into the bike, either sensing speed from the speedo, or it could be in the controller, and knowing the speed from the hall sensors in the motor. Another reason to get a different controller.

 

[amberwolf]

http://www.endless-sphere.com/forums/viewtopic.php?f=10&t=21272&start=0

 

[oldhaq]

If you can afford it get a 72v battery (or add to yours if they're sla's) and 72v controller.
Changing the motor to delta costs almost nothing in parts if you rewire it that way permanently, but you will need to modify or change the controller if it is still sensing and limiting your rpm somewhat (it seems like it is if your no-load speed is the same as loaded). If you look at where the the 2 speed control wires are attached to the controller's pcb there may be a resistor that can be changed or removed. A picture of the pcb may give a clue for someone who is familiar with that controller.
If you can't do anything with that controller, look into another controller but you will have to decide whether to go for a 48v or 72v, a 72v will have a higher lvc if you try it with your current battery pack first, unless you have it programmed lower.