# How do i determine max voltage for a custom BLDC [closed]

I would like to know the process that you would go through to determine the voltage rating on a BLDC. I imagine that it has something to do with how the coils are wrapped and the how many coils there are. Any further reading into this, or equations i can use would be appreciated.

## closed as unclear what you're asking by Eugene Sh., Chris Stratton, Brian Drummond, Bruce Abbott, Harry SvenssonJun 15 '18 at 1:24

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• This question doesn't make sense. Sorry. – Eugene Sh. Jun 14 '18 at 20:56
• Welcome to EE.SE, Jordan, but you'll need to improve your question to prevent it being closed. How is the 3D printer relevant to the BLDC. Why do you think that designing a BLDC motor is a good place to start in hobby electronics? What research have you done on BLDC motors. Your question would be much better if you show your research and ask one specific question on a part you don't understand. – Transistor Jun 14 '18 at 21:00
• The 3d printer isn't relevant i guess, i just want to know how to get a voltage rating for a custom BLDC, I would imagine it has to do with the thickness of the coil wire, and the ammount of wraps and the ammount of coils. and the diameter of the coil. – Jordan LaPrise Jun 14 '18 at 21:15
• Motors use technology with highly technical concepts. but the basics are heat rise comes from thermal resistance*Pd and Pd = I^2R losses and other losses, while Voltage and number of pole pairs per Rev determines the RPM with no load often rated as kRPM/V. I think you should study 1st , buy and compare specs with measured results before you try to design so you can understand what it takes to design. – Sunnyskyguy EE75 Jun 14 '18 at 21:27
• @TonyStewartolderthandirt Thank you very much, if you post this in the form of an answer I will accept it. – Jordan LaPrise Jun 14 '18 at 21:28