240 TO 85 VSC STEP DOWN TRANSFORMER

240 TO 85 VSC STEP DOWN TRANSFORMER#230758

By Munyua44 - Sat Jan 15, 2022 12:48 am

- Sat Jan 15, 2022 12:48 am #230758

Am working on the design of a power supply project that can step down the AC voltage from 240v to 85v then convert the 85 VAC to 85VDC. I have searched for a transformer that could step down this voltage but not yet found. Anyone of you who can help out?

Re: 240 TO 85 VSC STEP DOWN TRANSFORMER#230762

By jremington - Sat Jan 15, 2022 8:35 am

- Sat Jan 15, 2022 8:35 am #230762

Use the transformer with the nearest available output voltage, and design the rectifier/voltage regulator accordingly.

Re: 240 TO 85 VSC STEP DOWN TRANSFORMER#230777

By Munyua44 - Sat Jan 15, 2022 11:37 pm

- Sat Jan 15, 2022 11:37 pm #230777

jremington wrote: ↑Sat Jan 15, 2022 8:35 am Use the transformer with the nearest available output voltage, and design the rectifier/voltage regulator accordingly.

i have picked the transformer and now the new problem is how to know the right diode for the ful wave rectifier. I think different diodes have different ratings and there must be some suitable diodes for the 85vac to 85vdc output

Re: 240 TO 85 VSC STEP DOWN TRANSFORMER#230781

By jremington - Sun Jan 16, 2022 8:46 am

- Sun Jan 16, 2022 8:46 am #230781

Use diodes with inverse voltage > 150V and ample current rating.

Re: 240 TO 85 VSC STEP DOWN TRANSFORMER#230784

By YellowDog - Sun Jan 16, 2022 11:19 am

- Sun Jan 16, 2022 11:19 am #230784

https://variac.com/staco_240_1ph.htm

Re: 240 TO 85 VSC STEP DOWN TRANSFORMER#231619

By Munyua44 - Mon Feb 21, 2022 6:38 pm

- Mon Feb 21, 2022 6:38 pm #231619

jremington wrote: ↑Sun Jan 16, 2022 8:46 am Use diodes with inverse voltage > 150V and ample current rating.

do you have a sample image of how this is done? or maybe even a link to you tube video where I can get helped?
thank you for the idea. I will appreciate more support

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