Stupid controller question..

[anotherkiwi]

I have been scratching my head over the choice of controllers at BMSB, I want a 36/48 V controller I can use with a 12S battery and 17 Amps suits me fine.

I think the S12S 25A sine wave controller looks just right if I set C5 (limit current value) to 04. That should give me 16.666 Amps maximum current.

Am I missing something?

 

[Deleted member 4366]

Yes, you are missing something. Why do you want to set a lower maximum current. they use current control with the PAS, so just use levels 1 to 4. The S12S is quite a big controller. The 20 amp 09 bottle battery one is much smaller. It can be used on its own without the battery. What's more, it can easily be mounted to the frame. just take off the connector and blank off the hole.

 

[anotherkiwi]

I read all your technical posts d8veh:

"Any Kunteng sine wave controller. PSWPower.com have 17 amp and 20 amp. BMSBattery.com have the S06s 15 amp, but only 36v. Their 48v S12S is about 25 amps (keeps changing), which is powerful, but it's big. They also have a 20amp 48v dolphin battery one, which you can use on its own or get the battery with it already installed."

The PAS levels and the max current settings are two different kettles of fish, I have experimented with my 15 Amp controller which I ran for a time at 11 Amps just to see how it worked.

I don't want a 17 Amp controller from PSWP because I want to have a couple of hub motor wheels to swap in and out and one of them just might be a bit over the top and able to use 25 Amps. In the immediate future I want to run my Mxus at 17 Amps or so. There is the S09S at 22 Amps which is smaller but for once controller box size isn't a problem. I have the 36 V version of the 09 bottle battery controller which I could use (just about) with a 12S battery because the capacitor in it is 50 V IIRC, it would be close at 49.5 V hot off the charger.

I may be running the controller "headless", that is to say with the LCD out of sight so some times I might not know what assistance level I am in. That could be dangerous relying on assistance levels. Assistance level 4 with the S12S is only 12.5 Amps, great for most situations but I live on the blunt end of the Pyrenees...

Those are the points behind my question. And reading between the lines I think you have given me my answer and I thank you!

 

[Deleted member 4366]

There's no S09S. The S09P is square wave. A sinewave controller has to be 6 or 12 mosfets.