Request solution on multiple isolation output, each for 1kW

shawn liu

Prodigy 40 points

Other Parts Discussed in Thread: UCC28950

I met one requirement on power supply with 12 isolated outputs, each 28V, 35A, with 3-phase input

I have no idea and feel that this is a giant challenge.

Can anybody supply a draft solution?

over 12 years ago

0 CWilson over 12 years ago

Expert 1920 points

Diode rectification of the 3 ph input and a capacitor bank.

Then use e.g. UCC28950 for isolation. 1kW can be done on single ETD59 (or perhaps ETD49 or ETD54).

Use e.g. PE-67100NL for current sense.

It's best to make a small Flyback converter for your aux-supply for 12-15V. Assume around 4-5W for each converter for power drive (switches, gate drive etc.).

/CWilson.

0 John Bottrill over 12 years ago

TI__Mastermind 25130 points

Shawn,

You say 3 phase input and several hundred watts. Do you need to meet Power Factor Correction Requirements for your end product?

John

0 CWilson over 12 years ago in reply to John Bottrill

Expert 1920 points

Pro equipment above 1kW shouldn't need to comply with EN61000-3-2..?

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Request solution on multiple isolation output, each for 1kW