Speed limit controller remove

[filor6]

Greetings, I have already made the Shunt modification and it works perfectly, However, I cannot eliminate the speed limit having used the K and XS circuits. the now original maximum speed is 48 km/h with a full load. I attach photos of the controller. Thank you

 

[E-HP]

Greetings, I have already made the Shunt modification and it works perfectly, However, I cannot eliminate the speed limit having used the K and XS circuits. the now original maximum speed is 48 km/h with a full load. I attach photos of the controller. Thank you

What is the speed with no load (wheel off the ground)?

 

[filor6]

What is the speed with no load (wheel off the ground)?

Without K at GND the speed does not change (as original) The unmanned speed (with wheel raised) is 55 km/h. So the modification of the K was useless.

 

[E-HP]

Without K at GND the speed does not change (as original) The unmanned speed (with wheel raised) is 55 km/h. So the modification of the K was useless.

It’s not speed limited.

 

[filor6]

It’s not speed limited.

So is there a way to increase the top speed?

 

[E-HP]

Run a higher voltage battery. I can’t read the caps with your pics, but you probably can run 52v on that controller.

 

[filor6]

Run a higher voltage battery. I can’t read the caps with your pics, but you probably can run 52v on that controller.

The larger capacitor says 63 volts, the current battery is 48 volts. Should I then add a battery of just 4 volts in series?

 

[E-HP]

The larger capacitor says 63 volts, the current battery is 48 volts. Should I then add a battery of just 4 volts in series?

No. There’s safety considerations when running batteries in series. If you’re asking the question, then you need to do a lot of reading to understand how to do so safely before attempting it.
Besides raising the voltage, your other options would be a (programmable) controller that supports field weakening, or a motor with a faster winding.

 

[docw009]

Probably was a 16A controller originally. Six MOSFET's in a tiny box. You're really pushing those transistors if you can do 48 kph under load with a noload of 55 km/hour, You should get a wattmeter to see what kind of battery current is flowing. Most will have a max current reading. I am guessing you're around 25A. Well, if the cobtroller melts, you can buy a bigger one,



.

 

[filor6]

It is strange however that the k2 circuit to GND does not give any effect. From what I understand it should thus reach 120 percent of the maximum speed. But there is no change. Maybe. In any case, thanks for your advice.

 

[E-HP]

It is strange however that the k2 circuit to GND does not give any effect. From what I understand it should thus reach 120 percent of the maximum speed. But there is no change. Maybe. In any case, thanks for your advice.

Even though the board may indicate the possibility of a three speed switch, that doesn't necessarily mean that components installed on the board support that functionality. What components are mounted on the other side of the board, from the jumper you soldered in?

 

[filor6]

No nothing component

 

[filor6]

We did a lot of tests with the k1 and k2 circuits (speed 120%). IT DID NOT GIVE ANY RESULTS. One question I have is whether the K circuit should BE powered by (DC)? (as in the attached photo).

 

[filor6]

Probably was a 16A controller originally. Six MOSFET's in a tiny box. You're really pushing those transistors if you can do 48 kph under load with a noload of 55 km/hour, You should get a wattmeter to see what kind of battery current is flowing. Most will have a max current reading. I am guessing you're around 25A. Well, if the cobtroller melts, you can buy a bigger one,



.

 

[n00b]

So is there a way to increase the top speed?

More volts.

 

[E-HP]

We did a lot of tests with the k1 and k2 circuits (speed 120%). IT DID NOT GIVE ANY RESULTS. One question I have is whether the K circuit should BE powered by (DC)? (as in the attached photo).

No.
Remove the jumper and measure the voltage between your k1 and ground, and between k2 and ground with the controlleron. Both should have pull up resistors that should make k1 and k2 ~5v, if the circuitry for a three speed switch is present.

 

[filor6]

No.
Remove the jumper and measure the voltage between your k1 and ground, and between k2 and ground with the controlleron. Both should have pull up resistors that should make k1 and k2 ~5v, if the circuitry for a three speed switch is present.

Thanks so much, I'll give this a try. Yes, my scooter has 3 speed gears on the display. If the 5v voltage was present, what should I connect?
Thank you

 

[filor6]

Thanks so much, I'll give this a try. Yes, my scooter has 3 speed gears on the display. If the 5v voltage was present, what should I connect?
Thank you

Hi, I measured the controller when turned on as your advice, k1 and k2 measure approximately 3.6 volts. So I think the K circuit is working... But it has no effect on speed. Maybe I should connect the jumper to another pin? Or on one of the 3 speed pins? (see photo above (SC SB SA).. Thanks for any advice.

 

[filor6]

Hi, I measured the controller when turned on, k1 and k2 measure approximately 3.6 volts. So I think the K circuit works... But it has no effect on the speed by making the jumper to ground. Maybe I should connect the jumper to another pin? Or on one of the 3 speed pins? (see photo above (SC SB SA)?? .. Thanks for any advice.