Skunk
September 1, 2018, 7:55pm
28
Plus @psychotiller put up with all my stupid questions and indecisiveness.
And he sent me a hat
6 Likes
Sender
September 1, 2018, 8:14pm
29
Uh yeah. Mine too. The patience that man has… is ludicrous. I look back at some of my old questions and want to slap myself.
5 Likes
Skunk
September 1, 2018, 10:11pm
31
Been to a few of his live shows
1 Like
Wraith
September 1, 2018, 11:50pm
32
Gotta agree with you and @Skunk . @psychotiller has been real cool with answering anything from a wall of text full of basic questions about my build to just lots of random stuff about esk8 in general. What a guy
@psychotiller I’ll hold off my wheels and tires purchase for your six shooters. Would be more than happy to get them for my set of fatboy hubs! More support for awesome vendors on this community!
4 Likes
Skunk
September 2, 2018, 1:28pm
33
I run FOCBOX on 13s with 120A motor current. You see, the FETS are rated at 75v and upto 250A with proper cooling, if I’m not mistaken (need to check the data sheet again). The Focbox copper pours are rated for 50A @ 60V.
ESC are basically a buck converter. Varying the duty cycle. You can find lots of my posts on duty cycle. But the answer is simple.
Motor Max 120
Battery Max 50
Voltage 54.6
54.6V * 50A = 2730Watts
2730Watts / 120A = 22.75v
22.75V / 54.6V = 41% duty cycle.
So above 41% duty cycle the motor amperage will drop the meet the maximum battery amperage/wattage.
2730W / (54.6V * 42% Duty) = 119A
2730W / (54.6V * 43% Duty) = 116A
And below 41% the motor amperage can be upto 120A. Meaning more power to the ground during acceleration giving you your maximum output potential throughout the entire band. For example. Duty cycle comparison of actual output
Motor Max 60A
(54.6V * 10% Duty) * 60A = 327Watts
(54.6V * 20% Duty) * 60A = 655Watts
(54.6V * 30% Duty) * 60A = 982Watts
Motor Max 120A
(54.6V * 10% Duty) * 120A = 655Watts
(54.6V * 20% Duty) * 120A = 1310Watts
(54.6V * 30% Duty) * 120A = 1965Watts
As you can see, all examples are lower than the Battery Max 50A @ 54.6v (2730 watts) and also within the limits of the pours, 50A @ 60v (3000Watts), and the amperage is well under 75% of the rating on the FETs.
So with the right cooling for the ESC, a big battery and the capability of the ESC, why leave all that power on the table if you are within the limitations of the hardware…
Just saying
Edit: my point to this in the original topic of the thread, was sensored FOC helps the controllers accurately calculate motor angle, so no power is wasted from bad timing. The mixture of a clean phase timing, with lots of power, and traction control enabled so that the controllers can measure slip and not torque out makes the whole combo turn into sauce.
I’m to tired to take in this post or remember to read it latter, so I’m posting it here. makes sense to me at 6am after a 15 hour shift.
2 Likes
Sender
September 2, 2018, 1:29pm
34
You could just bookmark it
1 Like
Wraith
September 2, 2018, 1:34pm
36
That explains how you’re awake even in my timezone lol
1 Like
Skunk
September 2, 2018, 1:36pm
37
I’m lucky to sleep 5 hours a day between a needy, I mean loving wife, 6month old and three jobs, one of I have three employees to manage.(The 6 month old is much more reliable)
5 Likes
Wraith
September 2, 2018, 1:38pm
38
Damn I’m amazed you can even find time to ride. All the best! Now I see why you seem to be up even of it’s outside your local time
1 Like
mmaner
September 2, 2018, 2:42pm
39
Skunk:
And he sent me a hat
WTF, I’ve given him thousands, all my good whiskey, all the ferret porn he could use and option on my 1st born and I didn’t get a hat .
9 Likes
Sender
September 2, 2018, 2:58pm
40
Literally everybody who is anybody has a psychotiller hat. And you call yourself a leader.
11 Likes
mmaner
September 2, 2018, 3:00pm
41
You guys suck, I’m gonna go cry in the corner now with my 7 boards .
14 Likes
L3chef
September 2, 2018, 3:03pm
42
Damn you’re building a hell of a first eboard… Fuck yeah welcome to the club for real now
2 Likes
I have the shirt… sporting @psychotiller gear while I ride.
Can I call myself a leader now? XD
@mmaner I’ll join that corner if it actually has 7 boards
4 Likes
Sender
September 2, 2018, 3:06pm
44
A shirt is a quality piece, but hats denote true leadership qualities.
4 Likes
I want to see you in a downhill stance with both a helmet and that hat on
Maybe Dave should just start a clothing line…
5 Likes
Sender
September 2, 2018, 3:09pm
46
Yeah, how many are operational right meow, hmmm???
1 Like
mmaner
September 2, 2018, 3:28pm
47
2 Likes