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I bought a 775 DC motor 15000RPM 12-36V. I'm planing to build an electric skateboard with it. But I don't know how to supply enough power to this motor in order for it to carry me with a decent speed. I actually don't even know if I bought the right motor for it.

I tried something for testing purposes:

Firstly, connected the motor to a 12V 800mA power supply, didn't do much.

Secondly, I combined 12 piece of 1.5V alkaline batteries to get 18V, then connected the motor directly in parallel. The motor got 13.7V and was drawing about 0.7A.

Thirdly, I used a boost converter circuit. When takes in 18V batteries, also draws a current about 1.5A and gives out 32V. When I connected the motor to the output terminal of boost converter, the motor was drawing 0.65A current and got about 13-15V.

In conclusion, I don't know what kind of battery to buy. High power, lipo batteries are pretty expensive and i don't want to leave it to chance.

Does my 775 DC motor qualify for electric skateboard task? If so or not, how can I decide for the decent battery and motor for it?

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  • \$\begingroup\$ What are the specs for this motor? Try connecting to a car battery… \$\endgroup\$
    – Solar Mike
    May 14 at 16:46
  • \$\begingroup\$ Measure motor DCR resistance. That determines your start current not rated at 12V which affects heat rise. Your coasting no load current will be only 1% or so of this which is what you measured. You bought a cheap 4W motor that may draw 40W on startup. Good luck but not enough power. Compute Wh for battery requirements and expect you need 100W motor min. 350W typ. \$\endgroup\$ May 14 at 16:50
  • \$\begingroup\$ amazon.ca/… \$\endgroup\$ May 14 at 16:54
  • \$\begingroup\$ How many wires do you have coming out of the motor? I have an electric unicycle and it uses a Brushless DC electric motor (en.wikipedia.org/wiki/Brushless_DC_electric_motor) \$\endgroup\$
    – Rodo
    May 14 at 16:57
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    \$\begingroup\$ Usually good sellers give a datasheet with the products, like motors, that one buys. Cheap stuff tends to have important things like that missing… \$\endgroup\$
    – Solar Mike
    May 14 at 17:51

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