Endless Sphere

During double pulse test you want to look at the gate that is kept always off. Here you can see how the gate turn on looks like. Also, when you make RgOFF larger (slower turn off, less overshoot) you are making miller turn on worse because driver loses strength to keep the gate at 0V, so its not a s...

Slowing down the switching won't hurt much if you don't use very high switching freq like 25+kHz. High end VESCs often switch at 25 or 30khz because the observer works better with more sampling per second, but you can halve that by sampling on both V4 and V7. Its important to take a look at the gate...

Hello, someone has tested FF600R06ME3 from aliexpress?, prices are 1/4 the price at mouser! about 40€, is it possible? Most likely counterfeit, and most likely its not worth the risk if a total fire costs you more that what you saved in those IGBTs. On other news, we got merged some features for be...

Instant kills are usually caused by overvoltage or shoot through events, both can be seen in a double pulse test. Before performing any high power test your gate drive should be tuned based on your double pulse test results. If the long gate traces are too susceptible you will have to reduce the gat...

Hey marcos what is status of MTPA and flux weakning. I want to test switched reluctance IPM motor on this controller. That branch is quite behind the latest master branch, and requires you to build both vesc firmware and vesc tool in order to have the features. FW still lacks a safety feature that ...

Different conceps there * Max eRPM refers to the base frequency of the motor drive. If controller states 60kerpm then its PWM can generate 1kHz sinewaves while keeping the motor under control. * Max switching freq refers to the transistor switching freq, it could be 15, 18, 21kHz for example. Note h...

The Axiom part starts at 13:15 in the video. Soooo good to see you together on the stage, deep respect and congrats! The whole thing was an awesome meetup, and it was great to have the chance to finally have a team meeting, here are 4 glasses for maxi that didn't make it. 20191116_134321.jpg Btw I ...

That's a very awesome and valuable contribution Lebowski, thanks!! I'm not sure the STM32F4 can handle this non-center-alignement phase shift, I think it requires the coordination of many many timers. In any case, I sent the tip to benjamin vedder, we was considering this kind of signal injection so...

I thought VESC already supports multiple VESC with multiple motors over CAN? Is that not what Vedder describes as Arrays of VESCs or are we limited to an array of two VESCs only in Version 6? How do they implement e.g. 4wd skateboard with 4 VESC & 4 Motors? Are they simply running 4 motors off two ...

Does this controller have the ability to daisy chain, so if you had 4 motors, and 4 controllers, you could connect the throttle to one acting as the master controller, which would send data to the other 3? Everything is possible. The only limit is your imagination and your time. And the flash memor...

I watched one of Arlin's videos on the Axiom he's using in his Honda and he suggests there might be Torque Vectoring possible/coming? I assume Traction Control is already possible through VESC software anyway, but are there plans for Torque Vectoring to be available or is Arlin developing this just...

would like to ask also any update on the pcb that would let us adapt let say already built powerstage from some inverter to the axiom logic board? No updates in that regard. I have the kicad files ready to upload, they didn't change since we defined the general layout and pinout. I just never made ...

Hello MArcos, could you please provide some updates on what is going on with Axiom? any updates on ACIM support? Hi Shaggy, These last few days we were making the last strides in the hackaday contest, it closes today. One of the requirements is to make a video so we are spending the bootstrapping s...

Yes! Right after we finish validation and we have an enclosure made.

Into the finals!

https://prize.supplyframe.com

Wooot! Happy happy!

Now back to work. Dang SPI driver speedup is taking me ages to get working.

An old leaf motor can reach 200kw for a few seconds.

It would be useful to also specify the current/voltage range you need. There are compact 200kW drives out there, but its worthless if you need 10kW.

@marcos good to see this released! One question though. Why use a digital isolator + non-isolated CAN transceiver instead of an isolated CAN transceiver like the ISO1042? Main reason is sourceability, if that is a word. I prefer to avoid part obsolescence and keep supply chain flexible. ISO1050 and...

Complete schematic released!

http://www.powerdesigns.ca/files/Axiom_ ... ematic.pdf

Ugh, I'm sorry if that came the wrong way at that time. If you ever would like to give this hardware a try I'd happy to give you a walk through the coding workflow, at least the workflow I use which of course may not be the best. The code is not ready to support paid options as it hasn't been a prio...

I think I asked Lebowski if he wanted to try his algorithms in our board, but we code in C and he codes in assembler.
I agree it would be cool, and we also have the fpga available for custom functionalities that he could monetize as optional features.

Its conceptually the same as KV (rpm per volt). It spins the motor and measure BEMF to calculate it. KV and mWb only differ by a conversion constant.

I also watch batteries ... I realized one thing if you maky it yourself it will be very expensive (battery pack) ... but i found battery pack is really cheap from ( Kia Optima Hyundai Sonata Hybrid Battery ) ... cost approximately 350-500$ Yes, keep watching. From time to time some amazing deals sh...

You want to know exactly which enclosure you are going to use, with exact dimensions, 3D model, availability, and cost, and make sure you include the post-processing it needs for connector cutouts. This process can unveil some challenges I see like how to expose the JST connectors, or how to screw t...

There are no pullups in the schematic for the HALL sensors. Maybe your sensors are open drain and need that? The overvoltage is on purpose, its there so you can't use the default mcconf hardcoded in the firmware. Go to general->advanced and set up a reasonable max input voltage for your system, and ...