Search found 3117 matches

by Lebowski
Nov 15 2018 12:03pm
Forum: General Discussion
Topic: List of small hatchback cars
Replies: 88
Views: 1951

Re: List of small hatchback cars

A prius is much bigger than a small hatchbar car and roughly 3 times the price...
by Lebowski
Nov 12 2018 3:18pm
Forum: General Discussion
Topic: List of small hatchback cars
Replies: 88
Views: 1951

Re: List of small hatchback cars

Ive been doing a bit more research and have been reading up about all the issues with GDI and carbon deposits on intake valves. For Citroen and Skoda this means the bigger HP engines are out, including all versions with automatic. Kind of a bummer :? I tried the Honda Jazz (as the fit is called here...
by Lebowski
Nov 08 2018 3:28pm
Forum: General Discussion
Topic: List of small hatchback cars
Replies: 88
Views: 1951

Re: List of small hatchback cars

I am also looking at getting a new small car, budget around 15k in US dollar. I am considering the Suzuki Celerio, very economical at a real life 60mpg (my mam has one, hope I did the conversion to mpg correct). For me it is kinda small though, so I added the Skoda Fabia and the Citroen C3 to the li...
by Lebowski
Aug 29 2018 11:36am
Forum: Items for Sale - New
Topic: Advanced ADAPTTO controllers and compatible products
Replies: 1567
Views: 197088

Re: Advanced ADAPTTO controllers and compatible products

Merlin wrote:
Jul 06 2018 5:58am
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.... :mrgreen:
but he's got nothing better to do :D
by Lebowski
Aug 29 2018 8:05am
Forum: Motor Technology
Topic: Sensorless at standstill, development updates and status
Replies: 33
Views: 1872

Re: Sensorless at standstill, development updates and status

zro-1 wrote:
Aug 28 2018 9:09pm
Lebowski wrote:
Aug 15 2018 1:44am
...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...
by Lebowski
Aug 29 2018 8:04am
Forum: Motor Technology
Topic: Sensorless at standstill, development updates and status
Replies: 33
Views: 1872

Re: Sensorless at standstill, development updates and status

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...
by Lebowski
Aug 15 2018 1:44am
Forum: Motor Technology
Topic: Sensorless at standstill, development updates and status
Replies: 33
Views: 1872

Re: Sensorless at standstill, development updates and status

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

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...
by Lebowski
Aug 03 2018 3:40am
Forum: E-Bike Technical
Topic: Hall Sensors'b'Gone
Replies: 168
Views: 6758

Re: Hall Sensors'b'Gone

Sounds like a control loop instability to me....
by Lebowski
Aug 02 2018 3:18pm
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1713
Views: 172512

Re: Lebowski's motor controller IC, schematic & setup, new v2.A1

I will have a look after I am back from holiday... Am on Tenerife now, where it is nice and cool :D
by Lebowski
Jul 25 2018 2:28am
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1713
Views: 172512

Re: Lebowski's motor controller IC, schematic & setup, new v2.A1

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...
by Lebowski
Jul 05 2018 11:29am
Forum: Motor Technology
Topic: Sensorless at standstill, development updates and status
Replies: 33
Views: 1872

Re: Sensorless at standstill, development updates and status

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,...
by Lebowski
Jul 04 2018 2:09pm
Forum: Motor Technology
Topic: Sensorless at standstill, development updates and status
Replies: 33
Views: 1872

Re: Sensorless at standstill, development updates and status

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...
by Lebowski
Jul 04 2018 2:05pm
Forum: Motor Technology
Topic: Sensorless at standstill, development updates and status
Replies: 33
Views: 1872

Re: Sensorless at standstill, development updates and status

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...
by Lebowski
Jul 04 2018 1:55pm
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1713
Views: 172512

Re: Lebowski's motor controller IC, schematic & setup, new v2.A1

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...
by Lebowski
Jul 04 2018 5:45am
Forum: Motor Technology
Topic: Sensorless at standstill, development updates and status
Replies: 33
Views: 1872

Re: Sensorless at standstill, development updates and status

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...
by Lebowski
Jul 02 2018 12:42pm
Forum: Motor Technology
Topic: Sensorless at standstill, development updates and status
Replies: 33
Views: 1872

Re: Sensorless at standstill, development updates and status

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 ...
by Lebowski
Jul 02 2018 12:35pm
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1713
Views: 172512

Re: Lebowski's motor controller IC, schematic & setup, new v2.A1

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...
by Lebowski
Jun 30 2018 3:38am
Forum: Motor Technology
Topic: Sensorless at standstill, development updates and status
Replies: 33
Views: 1872

Re: Sensorless at standstill, development updates and status

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, ...
by Lebowski
Jun 27 2018 2:52am
Forum: Motor Technology
Topic: Sensorless at standstill, development updates and status
Replies: 33
Views: 1872

Re: Sensorless at standstill, development updates and status

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 (...
by Lebowski
Jun 26 2018 2:48am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 164
Views: 10154

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

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...
by Lebowski
Jun 23 2018 1:56am
Forum: Motor Technology
Topic: Sensorless at standstill, development updates and status
Replies: 33
Views: 1872

Re: Sensorless at standstill, development updates and status

It is all going in the main brain unit...
by Lebowski
Jun 22 2018 2:09pm
Forum: Motor Technology
Topic: Sensorless at standstill, development updates and status
Replies: 33
Views: 1872

Re: Sensorless at standstill, development updates and status

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 ...
by Lebowski
Jun 22 2018 8:05am
Forum: Motor Technology
Topic: Sensorless at standstill, development updates and status
Replies: 33
Views: 1872

Sensorless at standstill, development updates and status

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:

by Lebowski
Jun 22 2018 1:00am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 164
Views: 10154

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

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...
by Lebowski
Jun 21 2018 5:17am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 164
Views: 10154

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

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...