Search found 293 matches

by pf26
15 Nov 2017, 17:42
Forum: For sale, orders, etc.
Topic: MINI compatible with VESC® Software
Replies: 46
Views: 9697

Re: MINI compatible with VESC® Software

The link to the OHSPARK pcb seems to be dead in the first post. Is there a way to buy these pcbs directly from you or someone else, or to get the pcb manufacturing files (gerber + drill..) ? Many thanks in advance. I am interested to make/buy a couple of these miniVesc..
by pf26
30 Oct 2017, 10:46
Forum: Custom Applications
Topic: Long Term Regen
Replies: 4
Views: 869

Re: Long Term Regen

You can see 2 application examples here http://omegawatt.fr/paille/app_example.zip
One controls a generator (and acquisition of sensor), the other one the wing pitch motor (and acquisition of IMU sensor).
Rather poorly written and commented sometimes in french - but I hope it helps.
by pf26
29 Oct 2017, 13:36
Forum: Custom Applications
Topic: Long Term Regen
Replies: 4
Views: 869

Re: Long Term Regen

I use a VESC for unusual power generation as well (prototype of this thing: http://monopale.forumcrea.com/viewtopic.php?id=14 , vids here, formerly using another controller: https://vimeo.com/182373528 ) I wrote a VESC custom application to calculate the generator braking torque in real time dependi...
by pf26
27 Oct 2017, 10:48
Forum: Feature Requests
Topic: Separately excited motors
Replies: 5
Views: 1086

Re: Separately excited motors

My efficiency concern was only regarding the automotive alternator.
by pf26
26 Oct 2017, 09:30
Forum: Feature Requests
Topic: Separately excited motors
Replies: 5
Views: 1086

Re: Separately excited motors

While this looks interesting for the price and extra control capabilities, I fear the total efficiency will remain lower than a comparable brushless motor. But this needs to be checked, and the exitation could be controlled to optimize the motor efficiency. Do you have some figures about no load pow...
by pf26
26 Oct 2017, 09:19
Forum: Custom Applications
Topic: Camera Gimbal
Replies: 1
Views: 711

Re: Camera Gimbal

VESC is likely to be overkill in terms of power, and require shunt modification to handle precisely lower currents.
Or you may want to look for a "miniVESC" version, there are some projects described on this forum.
by pf26
22 Oct 2017, 17:15
Forum: General
Topic: Wiring CAN bus physically
Replies: 2
Views: 717

Re: Wiring CAN bus physically

NI: not implemented ? if you have 4 VESCs, you only need these terminaison resistors at both ends of the bus. 500kHz is already pretty fast for motor control application. At this speed, a CAN frame requires much less then a millisecond.. Going for higher CAN speed is possible but requires firmware c...
by pf26
20 Oct 2017, 17:28
Forum: General
Topic: "Peak Efficiency" Control Mode?
Replies: 110
Views: 14475

Re: "Peak Efficiency" Control Mode?

Did you try to record the measurements of a know scenario (like 50% throttle for 20 secondes, then 0%), with a real VESC board ? (for instance using VSC monitor with bluetooth on android). I think it would be nice to validate the model, especially regarding the motor/transmission/aero losses.
by pf26
19 Oct 2017, 12:14
Forum: Hardware Problems
Topic: new vesc and my c-6354 outrunner with 295kv
Replies: 4
Views: 903

Re: new vesc and my c-6354 outrunner with 295kv

Does the VESC LED flash red 3 times when acceleration stops ?
Did you try to read the faults using bldc-tools ?
by pf26
08 Oct 2017, 17:07
Forum: VESC Projects
Topic: High RPM rc motor for Ebike
Replies: 5
Views: 1066

Re: High RPM rc motor for Ebike

With 530KV and 12s at 100% duty cycle, you get something like 25000RPM and 250kERPM with 10 pole (assuming pole pairs). If I rekon well. I think this is about 4 times as many as the VESC can handle without issue in FOC mode. Maybe it is a bit better in BLDC mode. Anyway, this would limit you to 1/4 ...

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