Search found 38 matches

by whitepony
01 Jul 2016, 11:26
Forum: FOC
Topic: Efficiency FOC vs BLDC
Replies: 7
Views: 7287

Re: Efficiency FOC vs BLDC

couldnt stop thinking about the range difference and took the risk to flash FOC again - managed 48km with around 23kph average speed. should be more comparable now with the bldc 44km result. I wouldnt dare to call foc more efficient though based on the 2 runs, but it looks like it could be in praxis...
by whitepony
28 Jun 2016, 08:27
Forum: FOC
Topic: Efficiency FOC vs BLDC
Replies: 7
Views: 7287

Re: Efficiency FOC vs BLDC

just had my typical work commute yesterday with a 1km 10% rise where my tesseract with rspecc 190KV and BLDC usually gets so hot that the vesc powers down beyond the 80°C lower temp cutoff. with my sk6374 168KV of my vanguard in FOC mode, it didnt have to power down and managed the rise without issu...
by whitepony
27 Jun 2016, 04:21
Forum: FOC
Topic: Efficiency FOC vs BLDC
Replies: 7
Views: 7287

Re: Efficiency FOC vs BLDC

hui, great post, thanks a lot! shouldve crunched numbers myself instead of listening to my guts! :?
by whitepony
26 Jun 2016, 19:28
Forum: FOC
Topic: Efficiency FOC vs BLDC
Replies: 7
Views: 7287

Efficiency FOC vs BLDC

running vesc 4.12, FW 2.18 and I experienced a suprisingly large gap in efficiency of the 2 modes foc vs bldc. * tesseract, partially abused and over 2000km old 10S4P battery with LG HG2 cells and rspecc 190KV 15/36T gearing: bldc managed 40km max range under normal cruising conditions, last 2km in ...
by whitepony
16 Jun 2016, 12:34
Forum: FOC
Topic: FOC max current
Replies: 21
Views: 11059

Re: FOC max current

ah, found the video you mean - that was all 100% zero load at low speed. my video is 100% full load up to 41kph!
by whitepony
16 Jun 2016, 12:27
Forum: FOC
Topic: FOC max current
Replies: 21
Views: 11059

Re: FOC max current

dont get fooled by autonormalization, bldc is a lot louder! okp edits his videos, mixing sound with music. i just uploaded my phone vid! :p

as far as i know okp also only tried foc just very briefly, dont think i saw riding under load results of him on his boards?
by whitepony
15 Jun 2016, 19:22
Forum: FOC
Topic: FOC max current
Replies: 21
Views: 11059

Re: FOC max current

hmm, screaming motor when under a lot of load at higher rpm? that sounded a little familiar - just stumbled over this thread - if you are bored, could you have a look at this short accelerating and braking video if this sounds "normal" to you? the motor is an SK3 6374 168KV motor, 70A moto...
by whitepony
12 Jun 2016, 09:51
Forum: FOC
Topic: Bench test: min throttle = full ERPM, max throttle = lower ERPM?
Replies: 5
Views: 3830

Re: Bench test: min throttle = full ERPM, max throttle = lower ERPM?

hey rew, thanks for your input and the nice anecdote :lol:

it seems like all measurements go to hell as well though: -2A charging current, -75W power consumption. :?
by whitepony
11 Jun 2016, 05:16
Forum: FOC
Topic: Bench test: min throttle = full ERPM, max throttle = lower ERPM?
Replies: 5
Views: 3830

Re: Bench test: min throttle = full ERPM, max throttle = lower ERPM?

tested it last night on the road for 20km - was a really great experience. even smoother than BLDC and just really so silent - was extremely enjoyable to ride at midnight without fear of waking all the neighbors. :D

seems really like a zero load bench thing then?
by whitepony
09 Jun 2016, 21:04
Forum: FOC
Topic: Bench test: min throttle = full ERPM, max throttle = lower ERPM?
Replies: 5
Views: 3830

Bench test: min throttle = full ERPM, max throttle = lower ERPM?

hey benjamin or any other vesc expert. after contemplating a while i decided to give foc another try, hoping that I wont grill another vesc. well, it works on the bench, but I see behavior I cannot explain. setup: VESC 4.12, Firmware 2.18 10S battery SK3 6374 168KV motor PPM control, current no reve...

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