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Registered Member #3324
Joined: Sun Oct 17 2010, 06:57PM
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Posts: 1276
i was just thinking, is it possible, and would there be any use in building a 3 phase inverter and powering ferrite like that, 3 phase 50Khz, ever been attempted before?
Registered Member #65
Joined: Thu Feb 09 2006, 06:43AM
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I would wager the 50kHz switching would cause a number of attenuation losses that violate normal efficiency assumptions, and adding multiphase coupling noise would not simplify issues.
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Carbon_Rod wrote ...
I would wager the 50kHz switching would cause a number of attenuation losses that violate normal efficiency assumptions, and adding multiphase coupling noise would not simplify issues.
Cheers, Rod
If im not mistaken, isnt 3-phase just used for high power low ripple, like for the 33 ton high speed NC punch press i operated? doesnt it get around the pfc/harmonic/high current surge and such--problems of single phase?
Registered Member #65
Joined: Thu Feb 09 2006, 06:43AM
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This is not really related to Tom's inquiry, but things like an industrial VFD driver can actually be very hard on equipment if the motor is not rated "switching tolerant": One of the many reasons why these are a cheap deal on e-bay...
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Carbon_Rod wrote ...
This is not really related to Tom's inquiry, but things like an industrial VFD driver can actually be very hard on equipment if the motor is not rated "switching tolerant": One of the many reasons why these are a cheap deal on e-bay...
Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
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I've seen high power SMPS that use a 3 phase bridge converter and a 3 phase ferrite transformer. But these were really high power things, like megawatt pulses for particle accelerators.
On a more manageable scale, computer motherboards have a buck converter with at least 3 phases, but there is no transformer, just one inductor per phase.
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3 Phase Ferrite?
