Choosing the right motor kv for the VESC

pole pairs is related to how many magnets solely I think. you likely have 14 magnets. so 7 pole pairs

Great thanks! So even at max loading, my ERPM wouldn’t be over 53,000

I’m using the 6374 170KV sensor motor and the VESC from here. http://www.michobby.com/product/vedder-vesc-for-electric-skateboards/ http://www.michobby.com/product/maytech-6374-170kv-brushless-sensor-motor-for-electric-skateboardse-bike-copy/ WOW, they are promoting the VESCs with limited offer now. Anyway, the VESC and the 6374 motor are pretty good. Hope it is helpful for you, folks. I was using the 5065 motors and a 120A car ESC, but the 6374 with the VESC is fantastic. You can feel it!

Can you please not spam your own site like it wasn’t yours? We aren’t stupid and those electric skateboards are not the best

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Ah sweet, was looking for this. Now I am running TWO 190kv MAYTECH Motors (since I want the grip, the torque for hills and because I can ;)), so in theory this should match my 3 5Ah 4S1P (14.8v each) 25C LiPo’s perfectly right? (8570rpm/44.4v= 193kv)

So how does running dual motors affect this? If my physics class memories don’t fail me here I think that I don’t need to (heck - I shouldn’t) run double the voltage if I run the vescs in parallel (which I will do obviously), but the motors will suck more current, probably around double, right?

If want to achieve around 12-14km range, firstly great torque and secondly a topspeed of roughly 40km/h (me being 65kg light, medium hills around, 15/32 Gearing, 83mm Wheels planned), should I consider upgrading the Capacity of my batteries to - say 8000mAh? (I have heard the general rule is around 6-7 miles for 5000mAh, just want some clarification for dual motors)

Cheers!

12S is a bit high for a 190kV motor. Your nominal voltage is 44.4 (3.7 * 12), but when they’re fully charged the voltage is 50.4 (4.2 * 12) volts. I think 10S is what most people go for.

Since the amount of watts (volts * amps) required to move you doesn’t change, the amps for each of your motors is effectively half of what would be required in a single motor setup.

For range, you need to calculate the watt hours of your battery pack (how many watts can be used continuously for a full hour before the pack is empty). Watt hours is equal to amp hours multiplied by volts (1Ah = 1000mAh). A general estimate is that 10Wh will give you 1km of range.

the vesc will put out whatever you program it to do. What amp limit was it set at when you ran it solo? Maybe you have enough power ability already you just haven’t pushed the vesc to its limit.

Thanks so much Nick

I’ve just ordered this: https://hobbyking.com/en_us/turnigy-aerodrive-sk3-6354-260kv-brushless-outrunner-motor.html They’re 260KV but 18T (which means 9 pole pairs, right?) Are these too much on 8S? It seems they are based on the calculations

I just order a 6374 190kv 3150w and got a 12s2p coming with a vesc. (It’s all coming) x) haha

But how should this perform in your experience if I run things “not to hot, not to cold”.(60-70k) As in top speed and range. I have 97mm wheels and enertion 15 36

You can use this calculator to get an idea of your top speed: http://calc.esk8.it/

To get your range you can multiply voltage by amp hours to get watt hours. A general estimate people use is 10 watt hours per kilometer of range. Keep in mind, that estimate will change based on how hard you ride, how often you are going up/down hill and your weight.

Ok thank you, I’ve seen this I just didn’t know if the motor size (6374) made any difference compared to the 6355… the one I’ve ordered is 3150 w and the smaller 190kv motor is 2500 I believe. Also, will my set up run hot you think? Or can my vesc protect that. Just trying to play it super safe. After a solid month of obsessive research I finally pulled the trigger on a $1000 budget. And met it perfectly with a helmet extra belts and a few other things to boot.

I am 25, 160 pounds and my citys/towns are generally flat. With a couple decent hills here n there.

The only difference having a larger motor makes is that it can produce more power before overheating. The VESC is very powerful when it comes to protecting your board but it can also be a curse if you don’t know how to configure it correctly. Make sure you do a lot of research and find the right amp limits for you. Being relatively low weight, you won’t have any trouble in flats with that motor, but you could have a little difficulty with hills depending on how steep/long they are. Just make sure to get some speed before the hill and you shouldn’t have any problems.

The beauty of the VESC is that you can set it up for whatever range of power you want, so start low and build up to what feels comfortable.

And my prices on those parts are better than his…

Nice to actually talk to you after a month of seeing your posts… just joined today.

I’m actually about to order one of your enclosures for now. I was going back and forth between you and the space case and I got the space case. But, I got a 36" bamboo drop threw coming and I worried about the flex so the space case will be for my next build. Gunna do a dual drive with a little stiffer board for the case.

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I just made custom dual enclosures for someone with a flexy vanguard. I have the molds and they are roomier than boosted’s by a long shot!

$100 bucks shipped in the USA

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And thank you for the info nickthedude. It’s good to know that even with the 12s my vesc will stay happy and I can tell it to keep my motors happy too. And power is one thing I kinda crave but I crave reliability even more.

I rode ( it like I stole it ) yamaha dirt bikes my whole life with passion and for fun, but traded off my yz450f for a Harley 2 years ago. Well, I won a free swagboard in a raffle at work during Christmas time and I fell DEEPLY in love with a children’s toy. All I could think was , More speed, more power, more range , more stability… more more more. Until I’ve found myself patiently awaiting some super sweet parts.

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And I was thinking your Flagshipv2 on this board I have coming to me now. It’s 9 ply, coming with griptape. Do you think it will create gaps with a Lil flex… and thinking once I have the board dialed in to just seal it off indefinitely ( till it shells of coarse )

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@psychotiller @Strange4209 Please keep your posts on topic. Any more off topic posts will be removed from this thread. Please use PM. Thank you

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