One motor at 60amps or 2 at 30A?

ESK8 Electronics
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The diffrence is huge on a dual compared to single… HUGE!

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Not the OP, but I honestly can’t tell if all these answers are sarcastic or not lol

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Thanks for all the replies! I can’t understand how the diffrence would be so dramatic with the same power tho’. But I will probably try it out and see :slight_smile:

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Best answer anyone gave ever. True builders spirit.

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Haha! Experience is knowledge :smile:

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Scientia est lux lucis

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For everyone who can’t speak Latin. :slight_smile:

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Slightly off topic question.

But would a for example 6374 motor ran on 40% load more efficient or a 5056 at 75% load

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The 6374 would be cooler at least :slight_smile:

It would probably also last longer since it has to do less work

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This. Lower temperatures also mean less power losses.

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https://www.electric-skateboard.builders/t/torque-curves-for-sk3s-6354-260kv-6374-149kv-6374-192kv/19721 <-- can see some efficiency charts here but agree with others in general more overhead is a good thing and keeping heat losses and amperage low is ideal.

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But you only split the “battery” current numbers, not the “motor” current numbers

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We were talking about the battery. Now share some knowledge about the difference using 2 motors and the advantages of motor amps. Share the love Brian. I love it when you go all techie

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First things first

Motor current ≠ Battery current

Right now you are using 60A on the motor and the battery

With two motors you will set 30A on each VESC but you can and should set 60A on each motor, this way you have 120A in the motor total, meaning you will have double the torque

Now to the catch, to limit the battery current to 30A, the VESC wont go above 50% duty cycle, what that means? In the hill that will require each motor to keep at 60A you will climb at half of your top speed for a given battery voltage

  • If you can’t climb some hill at 60A motor and battery, you will be able to climb it with dual motor

  • If you can climb a given hill right now, you won’t climb it faster by going dual motor

In the first case you would be torque limited, it doesn’t matter at what speed, your motor at 60A simply doesn’t have enough torque

In the second case you are power limited, and what constrains it is the battery max

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Dual motors will give you more stability on full acceleration, you will feel safer and might ride with more confidence, braking two wheels is way more effective than a full brake on one wheel. Acceleration will be more powerful as you are already increasing efficiency on motors by reducing the current and accumulating less heat.

Go for it and report back with your findings, thank us latter

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30a is still alot of current. You will notice huge difference in performance. I made a board that i teach other people to ride on and its dual 6355 set at 25a each. Its still way more power than most people can handle. Certainly more than a boosted.

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I don’t think I have ever drawn over 70A battery on my dual 6374 street setup with pneumatic tires and that is climbing some serious hills.

Welcome to the dark side :sunglasses:

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Great information! Thank you for helping me understand it all :grinning:

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Thank you for all the great help :grinning: Looks like I will add a 2nd motor then :sunglasses:

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I am the same boat now. I have a board running on a 6264 190kv motor with vesc setting of 50amps and I am thinking of switching it to 2x 5365 200kv. I running 10s lipo so I think I can pull 70 to 80amp.

Today while I was going up some hills and I noted that not have enough tractions is the problem with single drive system. My single 6364 had enough power but it was slipping because lack of traction and perverting effective hill climb.