Recent content by Iambuilderman

Based on your suggestions, I looked into a Votol vs Fardriver comparison as well. The channel ‘ev components review’ has a teardown of the Votol Em-150 as well as of a Fardriver controller. The Votol controller looks very nice indeed. Only small modifications needed to make the power...

Yes, be careful with field weakening and no load testing of controllers + motors, that is a very useful warning for everybody. For that reason, i have set a max speed limit of 95 km/h in my cycle analyst (piggy back control system for ev controllers), so that the motor will never spin beyond...

600 phase amps for a 24fet sabvoton is rather amazing; that is 150 amps per mosfet! I usually stop at 100 - 120 phase amps per mosfet and some 70 battery amps per mosfet. I never blew a MOSFET during active duty though; only during testing of firmware settings. Did you modify your sabvoton...

With respect to the slow rise of phase amps: with my sabvotons, i found that after startup the first acceleration is slow; it almost seems like the controller is first trying to find the correct phase angle compensation? At least, that is my interpretation of what is happening. But after this...

Ok, that is useful feedback, thank you. Currently, I ride ebikes that weigh between 35 kg (carbon mtb) - 60 kg (alu daily driver). For that category, the kt and sabvoton controllers configured around 15 kW are a very nice fit; I don’t feel i need much more than that (more phase amps only results...

I was considering buying a qs 180 90h + nd721800 or nd961800, but seeing all the trouble with you guys not getting to work your fd controllers properly (slow ramp up of phase amps, jitters and judders at top speed, regen voltage problems) makes me hesitant. Do any of you have success stories...

Although I can understand your reasoning, I do not agree. It is too narrow of a view. To me, both regen and flux weakening are just extra design options that you can use when building your ideal ebike. To start with regen: regen is actually very useful and effective when you use it for what it...

We would miss you and your dedication Stancecoke! Is there no way to keep you interested in the KT controller? Maybe some sponsorship with an 18 fet controller :wink: :wink: ? It may be a simple controller, but it is also very tuneable and nearly indestructable. Currently running my 18 fet 72v...

I still get mine from AliExpres. VAT is now included in the price, and customs don’t charge any additional costs in my country. Ali now has a lot of warehouses in europe to help prevent additional costs. If you look carefully, you can still find the 18 fet 72v controllers around 80 euros during...

Ah, ok, then it makes more sense. Where do you plan to put the hc-05 module? I think it should be outside the controller or else the radio signal will be shielded by a farraday cage. The way i do it is as follows: as said before I use a 15/12v buck converter that powers the 15v rails. This is...

Of course you could supply 5v separately but I have personally never felt the need to do so. For stability and reliability during high loads (and corresponding large+quick voltage drop) I would highly recommend to use a buck converter for the 15v rail, just like you already do. The existing 5v...

I don’t know if this answer is really what you are looking for, but maybe it helps: Grin tech has a pdf file that describes how to implement a digi-aux on 1 analog input signal, using a combination of resistances and schottky diodes to create different ‘regions’ of operation. Your third button...

The bike is actually still a very normal looking and riding bike with 7 useable gears (60t chainwheel, 11t smallest at the rear). I can pedal with proper cadence from standstill all the way to 85 km/h. The throttle is not touchy at all; with the right settings it is very controllable from...

:D 8) :bigthumb: :bigthumb: And the safety features/net will be useful for every other bike as well of course

Great to hear that at least you guys are willing to provide a helping hand!! I guess we will have to find some kind of work-around for the power surge issues, without dev support. Besides the pass through open loop solution that we discussed before, what would also work in my opinion is if we...