Search found 105 matches

by Hummie
09 May 2017, 18:10
Forum: General
Topic: esc efficiency compared to motor.
Replies: 4
Views: 841

Re: esc efficiency compared to motor.

Seems a typical bldc motor will have some semblance of trap and sine and it's complicated

http://www.motioncontroltips.com/faq-si ... l-current/
by Hummie
09 May 2017, 17:00
Forum: General
Topic: How should the VESC "feel" on a board?
Replies: 71
Views: 7370

Re: How should the VESC "feel" on a board?

I'd think the heating of 100 motor amps at 50% duty would be more than the heat generated at 50 amps at 100% duty because of the square relationship in I(2)R.
by Hummie
09 May 2017, 06:50
Forum: General
Topic: esc efficiency compared to motor.
Replies: 4
Views: 841

Re: esc efficiency compared to motor.

I was wondering the losses in the Vesc compared to the motor or now that it's brought up how about also compared to hobby part esc? What would be the losses at half duty cycle vs full for both the vesc and motor, generally?
by Hummie
09 May 2017, 06:44
Forum: General
Topic: How should the VESC "feel" on a board?
Replies: 71
Views: 7370

Re: How should the VESC "feel" on a board?

Duggyboard Sounds like you should decrease the battery amp max and put the motor amps up. Vedder why recommend only 90 motor amps for a 63mm motor and not up to 160 if people want low speed power? Maybe the original poster would've been happy with his 245kv version and original gearing with the high...
by Hummie
08 May 2017, 19:03
Forum: General
Topic: code to change the motor amp limit
Replies: 138
Views: 28956

Re: code to change the motor amp limit

Since the duty cycle parallels speed and I would've only been able to hit 200 motor amps at startup but I'm sure I've pulled full throttle maybe at 2mph and that would still equate to higher than 160 motor amps and there was no problem. If the shunt resistance is the issue putting one on that would ...
by Hummie
07 May 2017, 23:01
Forum: General
Topic: code to change the motor amp limit
Replies: 138
Views: 28956

Re: code to change the motor amp limit

youre saying the current to the motor would be controlled by the load and not the throttle. I thought current control was current control and when I pull the trigger all the way I have access to whatever current the settings allow based on the duty cycle. i have a little plug chip for my vesc and an...
by Hummie
07 May 2017, 22:26
Forum: General
Topic: code to change the motor amp limit
Replies: 138
Views: 28956

Re: code to change the motor amp limit

so that's the answer. the sensor can't sense that high? that's as good an answer you can come up with. instead of trying to belittle me how bout you have a decent answer. I rode many miles at 200 motor amps and am asking why it works and works well when it's said the sensor can't do it. no i still h...
by Hummie
07 May 2017, 17:50
Forum: General
Topic: code to change the motor amp limit
Replies: 138
Views: 28956

code to change the motor amp limit

Anyone have it and could give a super simple explanation for the non-knowing of how to change it?

Anyone have a simple detailed explanation of the risks?
by Hummie
05 May 2017, 06:08
Forum: General
Topic: esc efficiency compared to motor.
Replies: 4
Views: 841

esc efficiency compared to motor.

how efficient is the vesc compared to a motor on an electric board?
by Hummie
03 May 2017, 06:55
Forum: General
Topic: Pwm and inductance
Replies: 1
Views: 314

Pwm and inductance

Since a magnetic field colapses instantly with each disconnect of a circuit it makes sense that the coils would produce an extremely powerful torque ripple at the motor's pulse train frequency. Why doesn't this happen?

Is the motor amps a peak or an average?

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