Body
Sven,
Do you have a schematic of the latest incarnation of your device with
the inductor buck plug?
On 1/7/2018 9:35 AM, 'S.friedrich' [email protected] [EVGRAY] wrote:
>
> Hi Mick, with the diode plug, the energy from the discharge capacitor
> comes to switch and discharge. No extra energy is required for the
> control as it is classic. There will be losses here as well. I have
> the feeling that the losses are to be found in the diodes and
> thyristors in the internal resistance. And there can not compete
> Mosfet or igbt. Greetings Sven
>
> Von Samsung Mobile gesendet
>
>
> -------- Ursprüngliche Nachricht --------
> Von: "Mick [email protected] [EVGRAY]"
> Datum:07.01.2018 15:01 (GMT+01:00)
> An: [email protected]
> Betreff: Re: [EVGRAY] Re: buck plug ...
>
> Sven,
>
> The new graphite foam heat sinks are becoming available maybe next
> aerogel. They should just make the part encased in aerogel with the
> leads sticking out.
>
> I have had my eyes on the SiC FET The diodes sound very interesting
> too, obviously the SiC junction can handle much more heat. Have FUn!
>
> Yes we are finding many reasons Hector likes SCR's not static
> sensitive, automatic cutoff at low current node, unidirectional, can
> take abuse. Obviously one difficult part of the design is as a low
> impedance controlled device they need enough current to switch fast
> enough therefore FET or fast small transistor driver like gallium
> arsenide opto gate driver8-)
>
>
> On 1/7/2018 6:54 AM, [email protected] [EVGRAY] wrote:
>>
>> Hi Ole, on the link you wrote me came this answer. I have SiC diodes
>> to test. I screwed it extra on a large heat sink. so that I notice
>> when they should heat up a lot and that the heat can be dissipated well.
>>
>> I think Hector did not use 180A diodes for nothing. The flow of
>> electricity must be extremely high, even if it is only for a peak, I
>> think.
>>
>> I would like to measure with the Scope soon on diode D2 and D5 of the
>> Buckplug circuit.
>>
>> regards
>>
>> Sven
>>
>>
>> https://electronics.stackexchange.com/questions/6151/is-paralleling-diodes-a-bad-idea
>>
>>
>> "Silicon Carbide (SiC) diodes can be paralleled without problem.
>>
>> As one diode heat up its resistance increases so other diodes taking
>> up more current. Current equalizing is guaranted by SIC semiconductor
>> material. You don't have to worry about thermal runaway. However they
>> are still expensive."
>>
>
>