1kW smps project (based on MicrosiM design)

[stewin]

Thanx Exflaco do you have schematic of yamaha Used?is it possible to use igbt on Detex 1.2kw with that oscillator transformer

enjoy yourself irvy

 

[irvynejay]

Thanx Stewin, Doyou have design Using IGBT?

 

[michelle]

2 etd stacked together

Irvi you can stack 2 cores etd 49 same detex schem and use igbt ,2000w easy ,or ir2153,more totem pole and igbt (yamaha schem)
Hi Exflaco
greetings do you have daughter pcb SG3525A OSCILLATOR PCB
warm regards
michelle

 

[stewin]

Irvi you can stack 2 cores etd 49 same detex schem and use igbt ,2000w easy ,or ir2153,more totem pole and igbt (yamaha schem)
Hi Exflaco
greetings do you have daughter pcb SG3525A OSCILLATOR PCB
warm regards
michelle

hi michelle
pls post more photos of the detex smps

 

[irvynejay]

here are the list of igbt on hand
irg4pf50wd 4pcs
irg4pc60u 4pcs
IXDH35N60B 4pcs
HGTG18N120BN 6pcs
IXFX38N80Q2 6pcs
IXFX15N80 4 pcs

 

[MicrosiM]

here are the list of igbt on hand
irg4pf50wd 4pcs
irg4pc60u 4pcs
IXDH35N60B 4pcs
HGTG18N120BN 6pcs
IXFX38N80Q2 6pcs
IXFX15N80 4 pcs

If have this limited number of IGBTS, I would suggest you to play safe, and to use maximum protection possible when you assemble / test, because one mistake will blow one pair at a time.

Anyway, the MOSFETS will work, and I really like the IXFX38N80Q2

the irg4pc60u would be the best option for SMPS, dont forget to use MUR460 diodes (External)


Let me know your progress,


regards

 

[irvynejay]

Thanx microsim,,, im still looking for any design i could make

 

[michelle]

Hi Microsim
greetings can you share any good 2kw smps schematic which is easy to DIY
warm regards
michelle

 

[mikile]

Hello people,
after a tons of reading posts, I decide to try my own version off Ludo SMPS. I made new PCB in Protel , and put main stuff and OC protection on main PCB. For first run I used irf740 (if they blew up, no big thing), and EE39 core from Feroxcube - 3c90. Smps worked from first power-on OK, and I got 105V at output , started with smaller load -100w bulb -ok, max. load I have was 2kW heater, when SMPS was loaded with 450w (
current from secondary was 4,8A, voltage was drop at 95V) and transformer started to buzz..
There was funny trace on my scope, was different between the two gates.. like on pictures, I changed Ir2110, but same thing... please help someone?

 

[MicrosiM]

Hello people,
after a tons of reading posts, I decide to try my own version off Ludo SMPS. I made new PCB in Protel , and put main stuff and OC protection on main PCB. For first run I used irf740 (if they blew up, no big thing), and EE39 core from Feroxcube - 3c90. Smps worked from first power-on OK, and I got 105V at output , started with smaller load -100w bulb -ok, max. load I have was 2kW heater, when SMPS was loaded with 450w (
current from secondary was 4,8A, voltage was drop at 95V) and transformer started to buzz..
There was funny trace on my scope, was different between the two gates.. like on pictures, I changed Ir2110, but same thing... please help someone?

Please show waves across each mosfet S+D whne the smps was loaded 450W

What is the value of the series capacitor?

What is the primary number of turns?

Also show the waves across the S+G of each mosfet


regards

 

[mikile]

ok MicrosiM, thank you for quick replay, you are very kind man.. transformer calculation is from ExelentIIt, 15turns in primary, 2x8 in secundary, 1uF cap. Scope waves comming soon..
I used 68x0.1mm in primaru and 6x0.6 in sec.

 

[mikile]

Please show waves across each mosfet S+D whne the smps was loaded 450W

What is the value of the series capacitor?

What is the primary number of turns?

Also show the waves across the S+G of each mosfet


regards

Here is some pic. off scope waves, just to said I burned irf740 when power up SMPS with scope probe connected to S+G, and replace them with irfp460, replace 2110 also. I do not have 1/100 probes at this moment, but I was connected my oscilloscope thru isolation transformer..
best regards..

Sorry if my English is not perfect..

 

[mikile]

There is marginal heating on fets and rectifiers with load connected..

 

[irvynejay]

Hello Microsim May i know what frequency on this smps design of yours ,,can i use this calculator (ExcellentIT-En) for the following core ee55,etd40,etd59,T50 ring core

 

[MicrosiM]

Hello Microsim May i know what frequency on this smps design of yours ,,can i use this calculator (ExcellentIT-En) for the following core ee55,etd40,etd59,T50 ring core

You can start with 65KHz

 

[MicrosiM]

@mikile

what is the value of the gate resistor?

 

[mikile]

@mikile

what is the value of the gate resistor?

It is 12 ohms. Do you think that it is better to wound transformer with ETD49 core and see how it will be?
What about layout of components?

stay well...

 

[michelle]

Hi Microsim
greetings any pcb design for 2 kw smps on post 614 schematic is it ok to try making it please can you help me
warm regards
michelle

 

[mikile]

@ Microsim

and 1 correction, the core is EE42 3c90 from feroxcube, I think that I can get 700-800w from that core.. when I make it work OK

 

[michelle]

full bridge smps

another smps design
warm regards
michelle