Recent content by dominik h

A hub motor will give a near silent ride, how smooth it is depends on the controller and the possibilities of their parameter settings. With gearbox, clutch and a chain you will have a lot of noise and probably also have resonance effects.

I once checked the full battery regulation voltage from the alternator and it was 14.5V. The fuel pump always draws 10-15A. If you are concerned about the bms cutting the battery, you can ad a big capacitor that will emulate the battery and will still cut voltage spikes when the bms has cut...

I drive since 3 years with a Porsche 40Ah lifepo 12V battery which I bought used, around 2 years old. The car is only used in the warmer period. The battery is made of A123 cells and the integrated bms cuts over 14,6V. The alternator is a 1.4kW type and the car has no big electronic loads, as...

You can try to raise the ratios in speed in the upper range. Which max rpm do you reach and what is the line current when max rpm is reached?

That is all you need for the auto learn. But afterwards the tuning for your desired Performance has to be done by yourself. Auto learn sets only basic things.

I have not found a way to set a permanent voltage with an USB-CAN converter. Everything I found is written in this thread, just read it.

Phase current is peak, as like almost on any other of the cheaper controllers Sabvoton and Votol also advertise with peak values. Sevcon has RMS values listed in there datasheet.

Hook up a charger and let the BMS do its job. In 48h the BMS can only transfer about 24Ah. If your battery is completly debalance it will probably take much longer. But it is also possible that same cells are damaged and have a higher self discharge.

Settings are in "Ratios in gear". There you can set different current and speed values. Do you have installed a switch to change between low , mid and high speed/gear?

Ratios in Speed is percentage of max phase amps in your actual set gear. If you set 50% at your first rpm (500) then the controller will reduce phase amps to 170A. You can enter every value between 1-100%, and it is better to smoothen the curve. But if you set 4 values to 50% then you will...

Reduce ratios in speed for the first 2-4 values to 50% and you will loose half the starting tourque.

I don't think the 3Shull 700 will be able to run at 20kW for hours. I have a fardriver ND721800 in my scooter, this Controller can do 60kW peak and is advertised for motors with 10-15kw continious power.

Yes, it was already done for charging Zero Motorcycles. I charged my 21S Scooter at first with two 48V Eltek in series. This worked as long as the battery was over 70V when the charger was connected.

Yes, that's possible. But the 24V Supply does only need half the power. I have used Flatpack S 24V 1000W and 48V 1800W in series and also Flatpack 2 He 24V 1800W and a 3000W 48V in series to charge my 21S Li-NMC battery. But ad a fuse to your charge setup. If one of the PSUs does shut off, the...