Endless Sphere

Merlin wrote: ↑

Jul 06, 2018 5:58 am

maaaaannnnn this could be so easy.....use a twitter account, or facebook or whatever....
even the god damn president of the states finds the time to post some bullshit on twitter....

but he's got nothing better to do

zro-1 wrote: ↑

Aug 28, 2018 9:09 pm

Lebowski wrote: ↑

Aug 15, 2018 1:44 am

...let alone in the assembly that I code in...

Wait. You code directly in assembly? (insert bowing emoji here) That's pretty amazing.

I find assembly simpler than C as there are a lot less instructions to learn...

Amazing work! So how does it work with power? Does it take a "break" from driving the motor now and then to run the algorithm, or does it work continuously while powering the motor? (Not that I think it matters much for the user. I am mostly just curious and amazed!) For now my lips are sealed... a...

I am up to my ears in this stuff now... it seems to work pretty good so far

The amount of calculations though is very large, plus they are all long difficult ones in Octave (the tool I use for simulations), let alone in the assembly that I code in...

Sounds like a control loop instability to me....

I will have a look after I am back from holiday... Am on Tenerife now, where it is nice and cool

I mean, it doesn't really matter what circuit you use, as long as the battery voltage is mapped to 2.5 to 5 V at the controller IC input. The mapping must be linear, and all possible battery voltages (so between completely full and empty) must fall in this range... I like the isolated amp by the way...

For what I know it should work at higher phase current as well, but it will put some demands on the electronics (especially the current sensors). I think it'll be a case of just trying and seeing when and why it fails, and then fix that. At the moment though it will go to the max of my power supply,...

I wish I knew so much about physics, electronics etc. to push things further than global companies like Texas Instruments are capable. Just fyi: I stumbled across a video explaining the TI Instaspin technology, I think I haven't seen it on the forum yet: https://youtu.be/szgVUfyX8JM I looked at thi...

I would love to see this development spread to every available controller as an option. However, I must be realistic when I state that any new development that is useful will be reverse-engineered and copied. So...your first controller model must be the most profitable to you. 48V/52V providing 60A...

1) 4.95V should be enough i its very stable, the chip automatically resets when it drops to 4.5V or so... 2) When the processor starts the first thing it does is look at the setup pin and go either setup or motor mode. After that there is no way to change the mode anymore. The processor starts: this...

Trying it out with my small (I think 4025) RC motor. With phase current and the computer showing the real time (rotor position) phase info. Note how the phase info is continuous and not just 6-stepping. DIIBAARAKss I added some AGC's inside the code to make it easier to try different motors. I tried...

I still haven't finished building the old version of the controller...and now you have started the ideal version of what I'd like to have on the trike. :) Well, I'll finish the ones I have and see how they're doing, then when you finish this design I'll see if there's any way to "patch in" the new ...

Hi Arber, Just to answer your questions: 1) yes it can work with only 1 throttle, in the setup menu you can specify only to use throttle 1 and not throttle 2. 2) I would indeed pull the reset on a fault detection, pull the reset (MCLR) to ground. This puts the chip in reset, a consequence of which b...

cleaned up my table to show the (simple) wiring more clearly. Also strapped it in to try to prevent any motor movement and to measure the pulling power (this is with 15A amplitude phase current again). UsajWB_Yy8E At the end of the video I mention I went all the way to the limit of my power supply, ...

Now I added the capability to run with a (15A) phase current. I set a fixed phase current as there is no throttle connected yet. In the video you can hear me flipping on the 15V/5V power supply (and thus cold-starting the processor). Note how the motor always starts and pulls in the same direction (...

As a main on/off switch I would just completely disconnect the battery. If you just want to shut down the low voltage part, I would interrupt both the high voltage going into the 15V DCDC and also the line where it measures the battery voltage (else it will supply a few mA via this resistor to the 5...

It is all going in the main brain unit...

I had it working with a little bit of phase current about a month ago (before some mayor rework, back then there was still a 50-50 chance of the direction being wrong), there's a video in another thread. I still have to add the capability to drive phase current to this version, and then I'll make a ...

As you may know from another thread, I'm busy developing sensorless start from standstill with full torque. Basically as if the (BLDC) motor had hall sensors or is using a resolver, but without either of these. This is where I am now:

Good info, thanks guys! I'm going to go ahead and put my brain on top. I want as thin of a package as I can get. I started cutting the second copper plate yesterday and will hopefully have it soldered this weekend. Should be rock and roll after that with the other components. Can you post a picture...

You can change the location of the brain board, just make 100% sure all connections are correct and not flipped. You can use a single high watt resistor to drop the voltage into the brain board. I just imagined a bunch of 100 Ohm 0.5W resistors would be the easiest to include in a kit because then e...

a non-EV related picture... not bad for a 750cc ICE (75 mpg in US units)

Watch out, the power rating values are only correct for the 100 Ohm example... with 50mA and the voltage you want to drop you can calculate the required rating. 40V and 50mA means you dissipate 2W, the resistor you use should be able to take this . When using 100 Ohm 0.5 W resistors for instance, yo...

Important remarks: R1: According to lebowskis video one page back this resistor ("tbd") should reduce the battery voltage to around 40 V at ~15 mA. A voltage drop of from 80 to 40V would mean a resistor value of 2.7 kOhm. Value in the kit: 220 Ohm (just a 3V reduction). Is this ok? R2: I think this...