Electronics > Projects, Designs, and Technical Stuff
High voltage/low current Power supply
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Red_Micro:
What could be cost-effective approaches for high voltage/low current power supply? Let's say you have 600V AC three phase input, and you want 5V/50mA, or 12V/100mA for a control circuitry? Parts at high voltages start to become expensive. Off the top of my head I would use a flyback converter with some 1500V rated transistor. Has anyone had this kind of experience?
David Hess:
What is wrong with using a 50/60 Hz transformer?
Red_Micro:

--- Quote from: David Hess on April 08, 2020, 12:10:22 am ---What is wrong with using a 50/60 Hz transformer?


--- End quote ---

The size. Usually these kind of high voltage/low current supplies are used in small metering accessories.
ChristofferB:
I'm sorry but I'm not sure I get what you're asking. Do you want to make 3-phase 600V or do you want to make a higher voltage from the 600V?

What voltage do you actually need? For most HVDC applications I'd go with inverter+voltage multiplier.
schmitt trigger:
My understanding is:
High voltage input , with a low voltage, low current output.

Am I correct?
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