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Ideal bridge rectifier GB
Ideal bridge rectifier GB
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Old 4th May 2019, 07:42 PM   #101
merlin el mago is offline merlin el mago  Europe
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Quote:
Originally Posted by tvicol View Post
Joimonf, next ideal bridge will handle 200V @ even higher currents, while been very compact.
Regards,
Tibi
Quote:
Originally Posted by nautibuoy View Post
Sounds interesting!
I'm interested too.
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Old 6th May 2019, 01:17 PM   #102
s610adam is offline s610adam  United States
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Yeah this sounds great:

Quote:
Originally Posted by tvicol View Post
Hi Jan,

For tube fans I'll have discrete ideal diodes that will handle up to 450V at 6A.
Hope the end of soft tube rectification is near.

Regards,
Tibi
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Old 6th May 2019, 01:32 PM   #103
Bigun is offline Bigun  Canada
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Ideal bridge rectifier GB
Who the heck designs tube amps running at 6A

I'd be interested in a solution for tube amps but there are already good reports from plain old diodes made from SiC and at 450V we don't care if we lose a few volts. However, I'm very interested in the soft-start option. I need more than 450V by the way - especially for choke loaded supplies.

Note: soft start is good for tube amps with EI transformers. The SS boys using humongous toroidal transformers need their soft start on the primary because the toroid itself is part of the start-up issue not just the caps. A soft-start on the secondary (as part of rectifier) will not fix their troubles.
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Old 6th May 2019, 01:47 PM   #104
tvicol is offline tvicol  Europe
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I have made a synchronous diode/rectifier design that may work at 1200V @ 30A.
Wonder who need such ?

Regards,
Tibi
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Old 6th May 2019, 01:54 PM   #105
analog_sa is offline analog_sa  Europe
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Ideal bridge rectifier GB
Quote:
Originally Posted by tvicol View Post
Hope the end of soft tube rectification is near.


But what about hard tube rectification? These types of comparison would be interesting.
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Old 6th May 2019, 01:59 PM   #106
Bigun is offline Bigun  Canada
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Ideal bridge rectifier GB
Quote:
Originally Posted by tvicol View Post
I have made a synchronous diode/rectifier design that may work at 1200V @ 30A.
Wonder who need such ?

Regards,
Tibi
Are you offering them for sale, I have a project coming up with a Hamond 714 (510-0-510) power transformer.
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Old 6th May 2019, 01:59 PM   #107
tvicol is offline tvicol  Europe
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Even at higher voltages, synchronous rectification make sense due very low power dissipation, very small and compact circuitry and very low noise. Diode switching noise become very important at higher voltages.
However, that glowing tube has his magic.

Regards,
Tibi
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Old 6th May 2019, 02:00 PM   #108
Bigun is offline Bigun  Canada
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Ideal bridge rectifier GB
Quote:
Originally Posted by analog_sa View Post
But what about hard tube rectification? These types of comparison would be interesting.
with soft start and good diode turn-off behaviour there will never been a reason to use a tube rectifier

of course, you can't go retrofitting anywhere you feel like it - without series resistors the high current pulses of SS diodes will over-heat many transformers designed for tube rectifiers due to I*I*R heating of the copper windings
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Old 6th May 2019, 02:03 PM   #109
Kay Pirinha is offline Kay Pirinha  Germany
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Quote:
Originally Posted by tvicol View Post
Synchronous rectification is the next step in audio (and not only audio),
Btw, do you know if synchronous rectifiers are used in automotive alternators as well? Are there any controller chips available?
Best regards!
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Old 6th May 2019, 02:04 PM   #110
tvicol is offline tvicol  Europe
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Quote:
Originally Posted by Bigun View Post
Are you offering them for sale, I have a project coming up with a Hamond 714 (510-0-510) power transformer.
I made this only as an exercise and for fun. Only the mosfet alone is quite expensive. I do not think this will end to have any commercial success.

Regards,
Tibi
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