VESC 6 Beta

General topics and discussions about the VESC and its development.
benjamin
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Re: VESC 6 Beta

Postby benjamin » 14 May 2017, 12:41

I'm finally done with the test bench software:



I think the VESCs will arrive in and ship from Nottingham during next week, and every unit will be programmed and tested as shown in the video.

Next I will focus on the VESC Project website and on the release of the source code for the firmware, for VESC Tool, writing coding and contribution guidelines and details about how to manufacture custom VESC-compatible hardware. I hope that the project will take off for real and that many different hardware versions and form factors will show up in the next months.

benjamin
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Re: VESC 6 Beta

Postby benjamin » 14 May 2017, 12:53

solbergen wrote:Now that the vesc6 will have significantly better cooling due to the aluminium casing etc, do you know the approx steady-state power throughput it will be able to handle? How much of an increase in possible power throughput should we expect?


As usual the answer is: it depends. I think 80 to 100 amps should be achievable continuously if the case is kept below 60 degC or so. The thermal time constant of the case is much slower than before now, so even if nothing particular is done to cool it, it will not get warm on most small electric vehicles oven on 100 A current limit. For example, I was riding my mountain board with a single 6374 motor at 100 A current limit, and when the motor was at over 80 degrees after accelerating up a steep hill a few times the VESC was at about 25 degrees (it was 5 degrees outdoors when I did the test).

A completely different application is if you need the same high current continuously for e.g some kind of pump. Then you probably have to cool the case somehow (which is quite easy since it is a block of aluminum) if you want to maintain high currents.

Also, since you asked about power and not current, I will comment on that. What heats up the VESC is the current, and the total power has almost no effect on the heating. So if you run at 100 A the continuous power would be 1000 w at 10 V input voltage or 5000 w at 50 V input voltage. So if you want to maximize power, go for as high voltage as possible.

lizardmech
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Re: VESC 6 Beta

Postby lizardmech » 14 May 2017, 13:45

Hi Benjamin
I just finished my board for testing as well, all I need is some firmware for it now. It's fairly close to the vesc V6, I just swapped the PWM outputs around for routing reasons.
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rew
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Re: VESC 6 Beta

Postby rew » 15 May 2017, 04:34

benjamin wrote:So if you run at 100 A the continuous power would be 1000 w at 10 V input voltage or 5000 w at 50 V input voltage. So if you want to maximize power, go for as high voltage as possible.

That should read:
So if you run at 100 A the continuous power would be 1000 w at 10 V effective output voltage or 5000 w at 50 V effective output voltage. So if you want to maximize power, go for as high voltage as possible.

So if you have a 50KV motor, it will run at 500RPM at 10V. (even when your battery is 50V). If this results in the right speed for your vehicle/pump/whatever, just running the motor at 50V would increase the RPM to 2500. So either you need a 5:1 transmission or a motor with 10KV.

benjamin
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Re: VESC 6 Beta

Postby benjamin » 15 May 2017, 09:19

rew wrote:
benjamin wrote:So if you run at 100 A the continuous power would be 1000 w at 10 V input voltage or 5000 w at 50 V input voltage. So if you want to maximize power, go for as high voltage as possible.

That should read:
So if you run at 100 A the continuous power would be 1000 w at 10 V effective output voltage or 5000 w at 50 V effective output voltage. So if you want to maximize power, go for as high voltage as possible.

So if you have a 50KV motor, it will run at 500RPM at 10V. (even when your battery is 50V). If this results in the right speed for your vehicle/pump/whatever, just running the motor at 50V would increase the RPM to 2500. So either you need a 5:1 transmission or a motor with 10KV.


That is correct, good point. I didn't point it out because it is kind of obvious and intuitive as things will approach infinity as the RPM approaches 0 (unless you reason like someone did on the thread I locked a few days ago).

pierre
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Location: uk

Re: VESC 6 Beta

Postby pierre » 22 May 2017, 12:20

Hi benjamin,

I would like to buy an VESC 6 from Trampa, but I cannot find where to download the BLDC tools for ubuntu ?

Thanks in advance,

rew
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Re: VESC 6 Beta

Postby rew » 23 May 2017, 05:34

Pierre, Trampa is ramping up to sending out the beta VESC6's... Only when that is successful, will they ramp up production for "general sales".

(The beta's were promised for "about a month from now" quite more than a month ago, but still haven't arrived).

JTAG
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Re: VESC 6 Beta

Postby JTAG » 24 May 2017, 15:29

For the guys not following the other forum:

VESC SIX 3.JPG
VESC SIX 3.JPG (65.82 KiB) Viewed 2866 times

VESC SIX 2.JPG
VESC SIX 2.JPG (79.54 KiB) Viewed 2866 times


This is the TRAMPA VESC6 beta batch. Just arrived at Trampa.

rew
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Joined: 25 Mar 2016, 12:29
Location: Delft, Netherlands.

Re: VESC 6 Beta

Postby rew » 25 May 2017, 03:42

JTAG wrote:For the guys not following the other forum:
Well.... That includes me... What other forum COULD I be following?

jaykup
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Re: VESC 6 Beta

Postby jaykup » 25 May 2017, 13:39



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