1000w smps based on LUDO3232

Silvio

Active member
Congratulations on the new setup. The site looks much better now. I was trying to log in on the old url but did not find anything and taught there was something wrong. I made a search on google and found it again :)
 

MicrosiM

Administrator
Staff member
Congratulations on the new setup. The site looks much better now. I was trying to log in on the old url but did not find anything and taught there was something wrong. I made a search on google and found it again :)

Hello Silvio

the old url should work fine as nothing is changed!

the attachments should work fine now
 

Silvio

Active member
I think I will stay here and forget the old site. I like it more here. The task bar includes everything you need and you do not have to go to advance etc everything is here. :)
 

MicrosiM

Administrator
Staff member
I think I will stay here and forget the old site. I like it more here. The task bar includes everything you need and you do not have to go to advance etc everything is here. :)
The old forums are no longer active.

Everything moved to this new platform, the old one was a real pain!

Thanks
 
Hi Silvio! I would like to build this source but with EE55, for sure I will have to remake the pcb to fit my horizontal core with grommet pins that I bought by mistake. Will 0.45mm-0.7mm wires work for me or should I buy a thinner one? Did you short-circuit the output? Greetings! IvanElectric
 

Silvio

Active member
Hi Silvio! I would like to build this source but with EE55, for sure I will have to remake the pcb to fit my horizontal core with grommet pins that I bought by mistake. Will 0.45mm-0.7mm wires work for me or should I buy a thinner one? Did you short-circuit the output? Greetings! IvanElectric
Yes you can use the 0.45 mm wire instead it is still good. You can use 2 bundles of 5 wires each 0.45 mm. This will give you a cross sectional area of 1.59mm^2 which is about the same. However an EE55 core is slightly bigger than ETD49.
My final number of turns with ETD49 was 18 turns primary and 9+9 turns secondary. This will give you around 75 to 80v CT in the output.
However an EE55 has a different center core size and you will need to alter the turns. I guess 14 turns primary will be adequate for EE55 and 7+7 turns will give you around 75v ct in the secondary. With this calculation your volts per turn will be 11v per turn. For your auxiliary winding 15v-0-15v then 2+2 turns will be good.
Yes the protection works fine with short circuit.
If you need further clarification do not hesitate to ask.

Good luck
 

Silvio

Active member
Here is the final PDF of the 1000w smps. This contains also options for feedback but if you intend to use it for audio purpose then you can omit this feature. I found it works better with less noise. I can drive my 1000w amplifier very well. You can find the amplifier using this smps in the link below.
 

Attachments

  • 1000W smps final.pdf
    2.2 MB · Views: 14
Hi Stewin, Well as far as the smps is concerned this must have a good working short circuit protection. It must sense both high and low side pulses. The one from Ludo is a good example of this. The only mishap is that it latches and you have to switch off for it to come on again.

Estoy trabajando en un HB smps que es LLC y la protección se restablece automáticamente. Esto me dará la oportunidad de obtener un buen valor de capacitancia de salida, especialmente en el arranque. Estoy usando una EE55 y mis esperanzas son 2000w continuos y 2500w en el pico. Todavía tengo que esperar a que lleguen algunas partes más. Acabo de terminar de grabar y perforar y colocar los disipadores de calor en la PCB. El oscilador principal y la protección se encuentran en un encabezado de pines separado. Esto lo hace más compacto y también fácil de reparar en caso de avería. También obtuve los smps auxiliares en un encabezado de pin. Esto se publicó aquí hace aproximadamente un mes.

La capacitancia de entrada es de 4 caps @ 680uF X 450v, esto da 2700uf a través del riel de 320v. El voltaje de salida debe estar alrededor de 85-0-85 y una capacitancia de 5000 uf en cada pata del riel de salida. También incluye un riel doble regulado de 15v para preamplificador y un control de velocidad del ventilador regulado por calor para 3 ventiladores de 80 mm 12v. También se incluye protección térmica. Lo único que no tiene es que los motores de los ventiladores se detendrán por sobrecarga térmica ya que estos son alimentados por el transformador principal y no por una fuente auxiliar.

aquí hay una foto de mi trabajo hasta ahora para el prototipo

View attachment 6963

Hi Stewin, Well as far as the smps is concerned this must have a good working short circuit protection. It must sense both high and low side pulses. The one from Ludo is a good example of this. The only mishap is that it latches and you have to switch off for it to come on again.

I am working on a HB smps which is LLC and the protection is self resetting. This will give me a chance for a good output capacitance value especially on start up. I am using an EE55 and my hopes are for 2000w continuous and 2500w on peak. I still have to wait for some more parts to come. I just finished the pcb etching and drilling and fitting the heat sinks. The main oscillator and protection is on a separate pin header. This makes it more compact and also ease of repair in the event of failure. I also got the auxiliary smps on a pin header. This was published here a month or so ago.

The input capacitance is 4 caps @ 680uF X 450v this gives 2700uf across the 320v rail. The output voltage is to be around 85-0-85 and a capacitance of 5000uf on each leg of the output rail. it also include a double regulated 15v rail for preamp and a heat regulated fan speed control for 3 X 80mm 12v fans. Thermal protection is also included. The only thing that it does not have is that the fan motors will stop on thermal overload as these are powered by the main transformer and not from an auxiliary supply.

here is a pic of my work so far for the prototype

View attachment 6963
Hi Silvio! What about that project with EE55? it's finished?
 
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