100V PWM Help needed
Ivan Stamenkovic wrote 02/24/2020 at 01:57 • 0 pointsHello guys, I am kind of looking for help. I am in the middle of building DIY Mini CNC, and I have that generic 500W spindle from aliexpress and it came with power supply. It is a ~100V ~6A PWM power supply with a pot to adjust duty cycle.
But I connected on/off wires directly to arduino and it fried both power supply and arduino(I now know that I should isolate that with a relay or optocoupler). I don't have much knowledge in electronics but I think it's a 12V voltage regulator that went bad but I am not sure and it's all SMD.
I wanted to ask you guys for any instructions or guides and maybe what components I might need to build a new one. I have a bunch of components laying around and I can source mostly locally. But buying a new power supply would take more then 2 week because of corona and I can't find it locally.
I tried looking for circuits online but none matched what I need :(
EDIT: This is the powersupply I am trying to re-create. https://bit.ly/32vQbQt
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Considering your level of knowledge and experience, my advice is don't attempt at all to build a PSU of this amount of voltage and power. There are just too many pitfalls and problems, not just safety.
Even experienced electronics hobbyists would find it difficult. The best place to get a cost effective PSU is go back to China again. Good quality and reliability.
You'll likely find the motor will run from a car battery (much slower of course, but will have the same torque) while you are awaiting delivery.
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