Search found 7 matches

by Addy
14 Dec 2017, 19:52
Forum: Hardware Problems
Topic: Turnigy SK3 6374 149 motor
Replies: 5
Views: 183

Re: Turnigy SK3 6374 149 motor

I use this motor with V4.12 VESCs that I assembled. Normally the detection works fine. One time I could not get detection to work and the resistance reading was quite high, like yours. The problem for me was that the DRV chip was broken. Two of the mosfets were not being driven. I checked with an os...
by Addy
01 Nov 2017, 16:34
Forum: General
Topic: "Peak Efficiency" Control Mode?
Replies: 108
Views: 8302

Re: "Peak Efficiency" Control Mode?

. For all practical purposes the kinetic energy in the electrons is zero. This is the most important part. Devin, you can keep spouting calculations but what would actually be interesting is if you put some of that effort towards implementing your "peak efficiency" control mode with a cus...
by Addy
06 Sep 2017, 21:31
Forum: General
Topic: Power Limiting instead of Current Limiting
Replies: 25
Views: 1464

Re: Power Limiting instead of Current Limiting

Not sure why the motor current limiting is giving you trouble. It works well in my e-bike, during testing I found that motor currents over 75A caused my motor mount to flex too much, but by limiting the motor current to 75A everything is fine with full throttle applied. How is your VESC set up? How ...
by Addy
06 Sep 2017, 16:19
Forum: General
Topic: Power Limiting instead of Current Limiting
Replies: 25
Views: 1464

Re: Power Limiting instead of Current Limiting

Why not limit the motor current instead of battery current? Then it doesn't really matter what the battery voltage is.
by Addy
31 Aug 2017, 05:57
Forum: General
Topic: Cable length
Replies: 7
Views: 747

Re: Cable length

rew wrote:It is better to have short wires from the battery and longer wires to the motor than the other way around.


What makes you think that?
by Addy
30 Aug 2017, 18:40
Forum: General
Topic: Cable length
Replies: 7
Views: 747

Re: Cable length

Yes, it matters unfortunately. Long wires between the battery and VESC are not so bad because the VESC capacitors can provide some current for short bursts. Long wires between the VESC and the motor are less desirable. The motor phase currents are generally higher than the battery current, so you wo...
by Addy
30 Aug 2017, 00:22
Forum: General
Topic: "Peak Efficiency" Control Mode?
Replies: 108
Views: 8302

Re: "Peak Efficiency" Control Mode?

Not sure why you're trying to think of this in terms of drift velocity. Current is a simpler concept to think about instead of drift velocity. To maximize efficiency like you're talking about you would have to keep the motor at the speed at which it is the most efficient, and that speed is determine...

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