Octa Wind and Non Octa Wind
04-27-2011, 04:12 PM
#16
The octawinds are smoother and run a bit cooler. The original X12s are pretty brutal. If you read the original release notes...
LRP have introduced the 2nd generation of their XTEC X12 technology, which feature an 8 time (Octa) winding instead of the previous 4 time winding, the effect is a different power characteristic resulting in much higher performance. The LRP R&D team has increased the number of copper wires used in the motor, resulting in lower resistance and thanks to the lower heat development of the octa wind less energy is lost resulting in higher efficiency. The end result is more power.
LRP have introduced the 2nd generation of their XTEC X12 technology, which feature an 8 time (Octa) winding instead of the previous 4 time winding, the effect is a different power characteristic resulting in much higher performance. The LRP R&D team has increased the number of copper wires used in the motor, resulting in lower resistance and thanks to the lower heat development of the octa wind less energy is lost resulting in higher efficiency. The end result is more power.
04-28-2011, 02:06 AM
#17
Tech Fanatic
That would not be the ultimate in knowledge, it would be the ultimate in Physics. No one possess it, everyone has access to it and it governs all our lives every day. If I'm drunk on knowledge, I hope I never get sober.
Now, where's my drinking buddy Wingracer - he owes me a Newton's Third Law of Motion, on the rocks!!
04-28-2011, 09:56 AM
#18
04-28-2011, 02:15 PM
#19
Tech Fanatic
(I think we'd better stop this before they think we are... well, whatever they think we are!!
)
05-04-2011, 11:12 PM
#20
Tech Addict
Firstly i would like to say sorry to WingRacer for being rude..
But you can`t trow out formulas without mentioning the units its measured in.
It happens all the time and it is frustrating.
time + distance = timetravel.
It doesn`t work like that..
That would be correct if its a DC motor.. it aint..
Pin= U x I x Rot of 3 x cos fi. add Efficency to get Power out.
CraigM said whats needed to be said.. they are supposed to have a higher efficency++
But you can`t trow out formulas without mentioning the units its measured in.
It happens all the time and it is frustrating.
time + distance = timetravel.
It doesn`t work like that..
Pin= U x I x Rot of 3 x cos fi. add Efficency to get Power out.
CraigM said whats needed to be said.. they are supposed to have a higher efficency++
Last edited by MatsNorway; 05-04-2011 at 11:26 PM.
05-05-2011, 12:11 PM
#21
Tech Fanatic
Sorry Mats, but not correct. Our motors are DC motors - they are powered by a DC power source, not AC. The switching of the coils by the speed controller is no different to the switching perviously carried out by a commutator on a BR motor. Check it out - these are DC electric motors!
And the power calculation for that is actually here, as well as in my fine reference book!
http://en.wikipedia.org/wiki/Power_(physics)
And the power calculation for that is actually here, as well as in my fine reference book!
http://en.wikipedia.org/wiki/Power_(physics)
05-06-2011, 02:42 AM
#22
Tech Addict
Finally.. thanks.
"Although BLDC motors are practically identical to permanent magnet AC motors"
So it lacks the cos fi.. but it still got overlap and three phase..
Below sentence explains why the newer motor gets lower and lower Kv ratings..
"To achieve full rated torque, the coils in a stepper motor must reach their full rated current during each step. Winding inductance and reverse EMF generated by a moving rotor tend to resist changes in drive current, so that as the motor speeds up, less and less time is spent at full current — thus reducing motor torque. As speeds further increase, the current will not reach the rated value, and eventually the motor will cease to produce torque."
I asked Venom and Trinity but for some reason they all said 3 phase motor.. but they were not sure.. Trinity said its probably a syncron type, who now seems close but no cigar.
Seems hard to get trough too the tech guys at the respective manufacturers.
"Although BLDC motors are practically identical to permanent magnet AC motors"
So it lacks the cos fi.. but it still got overlap and three phase..
Below sentence explains why the newer motor gets lower and lower Kv ratings..
"To achieve full rated torque, the coils in a stepper motor must reach their full rated current during each step. Winding inductance and reverse EMF generated by a moving rotor tend to resist changes in drive current, so that as the motor speeds up, less and less time is spent at full current — thus reducing motor torque. As speeds further increase, the current will not reach the rated value, and eventually the motor will cease to produce torque."
I asked Venom and Trinity but for some reason they all said 3 phase motor.. but they were not sure.. Trinity said its probably a syncron type, who now seems close but no cigar.
Seems hard to get trough too the tech guys at the respective manufacturers.
Last edited by MatsNorway; 05-06-2011 at 03:10 AM.
05-07-2011, 01:16 PM
#25
Tech Addict
Octa-wind... LRP would not have made it if the did not think it was better.
05-07-2011, 04:16 PM
#26
Tech Master
Better indeed.
For more sales.
I think the valuable thing to take away from reading all of this, is that 90% of what is written is crap. 5% is made up. The other 10% is bollocks.
For more sales.
I think the valuable thing to take away from reading all of this, is that 90% of what is written is crap. 5% is made up. The other 10% is bollocks.
05-09-2011, 12:28 PM
#27
Tech Fanatic
Which means 3.5 of your words are bollocks. I'll take "better indeed. For mo" Which seems to conform to the 90% Rule... But then I'm missing the other 5% that makes up the 105% of your post... No, you're right, that post falls into the 90%... 
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