Search found 109 matches

by Hummie
05 Sep 2017, 00:13
Forum: General
Topic: "Peak Efficiency" Control Mode?
Replies: 110
Views: 15355

Re: "Peak Efficiency" Control Mode?

maybe it was mentioned and the wattage posted is a the high end of the speed spectrum and how much power it would have going from 3 to 5mph when the voltages are so low? if that's what youre saying...always keeping the applied voltage just a hair above the back emf.
by Hummie
04 Sep 2017, 23:50
Forum: General
Topic: "Peak Efficiency" Control Mode?
Replies: 110
Views: 15355

Re: "Peak Efficiency" Control Mode?

seems like it would just be a really low acceleration program as it would always have to keep the applied voltage so close to the back emf and minimal current flow. http://www.ebikes.ca/tools/simulator.html/?bopen=true&throt=50&cont=C40&motor=MTC4080&hp=0&grade=13&batt=B7223_...
by Hummie
04 Sep 2017, 20:39
Forum: General
Topic: "Peak Efficiency" Control Mode?
Replies: 110
Views: 15355

Re: "Peak Efficiency" Control Mode?

if your most efficient speed is 25mph and youre starting from 0 but limited in your ability to accelerate you will lull around in inefficiency for a longer time as it takes longer to get to the efficient speed. it seems easier to use your "internal computer" in choosing what amount of acce...
by Hummie
02 Sep 2017, 17:14
Forum: FOC
Topic: vesc with sensors efficiency
Replies: 1
Views: 781

vesc with sensors efficiency

could someone link me to it if it's already written somewhere but how much more efficient running foc with sensors vs foc without sensors and at what rpms is it relevant? anyone do a comparison? I ask because sensors are a pain in the ass to put in and seem just another part to break. if they don't ...
by Hummie
20 Aug 2017, 05:13
Forum: General
Topic: code to change the motor amp limit
Replies: 138
Views: 34335

Re: code to change the motor amp limit

actually forget it I remember now
by Hummie
30 Jul 2017, 00:56
Forum: General
Topic: The Min Speed of BLDC with VESC ??
Replies: 3
Views: 2867

Re: The Min Speed of BLDC with VESC ??

Rew do u know how much more efficient a slow speed high torque motor would be with or without sensors? It's hard to get a reliable temp reading on a motor but they seem to run ten to fifteen degrees cooler with sensors. That's a lot Also at what rpm will it switch out of sensor mode to plain bldc wh...
by Hummie
07 Jun 2017, 02:06
Forum: General
Topic: VESC not allowing feathered braking when going downhill slowly
Replies: 18
Views: 3305

Re: VESC not allowing feathered braking when going downhill slowly

are you sure its not just the transmitter? I've used transmitters that had trouble modulating brakes going downhill, the steez remote for one. have you tried the mini trigger it seems to have the best modulation for me.
by Hummie
27 May 2017, 18:02
Forum: General
Topic: code to change the motor amp limit
Replies: 138
Views: 34335

Re: code to change the motor amp limit

I agree that the resistance is proportional to kv. Yes. I haven't disagreed on that. I still don't believe it causes it. Magnetic inductance I believe decides kv/kt (which are inverse). The conversion of turns physically of the wire ,with a core or not, is Linearly related I think into infinity, u c...
by Hummie
25 May 2017, 13:48
Forum: General
Topic: code to change the motor amp limit
Replies: 138
Views: 34335

Re: code to change the motor amp limit

5 thin strands doing 10 turns each is the same inductance as 1 big strand doing the same 10 turns pretty much, as apposed to one thin strand doing 50 turns and greatly reduce the kv Inductance decides kv and the resistance produced is an unfortunate by-product. A correlation you find works in a spec...
by Hummie
24 May 2017, 06:52
Forum: General
Topic: code to change the motor amp limit
Replies: 138
Views: 34335

Re: code to change the motor amp limit


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