capacitor explode!! HELP

[y6n1212]

Hi guys!! I'm connecting my new handmade transformer to the load side of an full bridge inverter. But suddenly the capacitor at the lower side of voltage divider explode and the smell is so bad!!

I did not change any input voltage or anything. i just make a new transformer which has higher amp rating.
Could transformer short circuit at primary winding and make capacitor short circuit and then explode?

 

[dselec]

Hi guys!! I'm connecting my new handmade transformer to the load side of an full bridge inverter. But suddenly the capacitor at the lower side of voltage divider explode and the smell is so bad!!

I did not change any input voltage or anything. i just make a new transformer which has higher amp rating.
Could transformer short circuit at primary winding and make capacitor short circuit and then explode?

Diagram !!! like this ?
https://www.google.co.il/#hl=iw&sit....,cf.osb&fp=5354e1047c15692a&biw=1280&bih=823

 

[y6n1212]

Diagram !!! like this ?
https://www.google.co.il/#hl=iw&sit....,cf.osb&fp=5354e1047c15692a&biw=1280&bih=823

sorry it is half bridge inverter. typo error.

the diagram is just like the half bridge inverter picture attached.
except that i substitute the R load with a transformer.

the capacitor blown up just like the second picture attached.:!:

 

[godfreyl]

Capacitors can fail if the ripple current is too high or the voltage is too high or reversed. It is also a good idea to choose capacitors with a low ESR.

It looks like one of those capacitors leaked and the other is just swollen. You are lucky. Capacitors can really explode with a loud bang and shoot the whole metal can off like a bullet. Be careful not to have a capacitor aiming at you when you are testing or you may get injured.

 

[y6n1212]

Capacitors can fail if the ripple current is too high or the voltage is too high or reversed. It is also a good idea to choose capacitors with a low ESR.

It looks like one of those capacitors leaked and the other is just swollen. You are lucky. Capacitors can really explode with a loud bang and shoot the whole metal can off like a bullet. Be careful not to have a capacitor aiming at you when you are testing or you may get injured.

Can i understand more about what is meant by ripple current which can fail capacitors?

 

[Tahmid]

You can read about it here:
https://en.wikipedia.org/wiki/Capacitor#Ripple_current

Hope this helps.
Tahmid.

 

[chuckey]

"Could transformer short circuit at primary winding and make capacitor short circuit and then explode?" If you have 4000 turns on the 230 V side and 400 on the secondary side, this would give you 23V on the secondary. If you had a short on the primary side, there might be , say 2000 turns carrying the current, the volts on the secondary side would now be 46V.
Frank

 

[goldsmith]

Dear Frank
Hi
I think That is kind of SMPS in half bridge arrangement . so it's transformer is high frequency and naturally i don't think it's turn numbers are as high as 4000 turn or even 400 turn .
Isn't it ?
Best Regards
Goldsmith

---------- Post added at 01:29 ---------- Previous post was at 01:20 ----------

And to the author of this thread :
Hi
I think the permeability of your core wasn't the same with the original core . isn't it ?
Best Wishes
Goldsmith

 

[y6n1212]

Dear Frank
Hi
I think That is kind of SMPS in half bridge arrangement . so it's transformer is high frequency and naturally i don't think it's turn numbers are as high as 4000 turn or even 400 turn .
Isn't it ?
Best Regards
Goldsmith

---------- Post added at 01:29 ---------- Previous post was at 01:20 ----------

And to the author of this thread :
Hi
I think the permeability of your core wasn't the same with the original core . isn't it ?
Best Wishes
Goldsmith

i did not change my core actually. i only twisted more conductor for each winding so it have higher amp rating.

 

[dselec]

GOOGLE "SINGLE PHASE half bridge inverter" AND download the first pdf file read every thing about your circuit.
any way how r u trying to make such complicated circuit not knowing what ripple is ???
next u should read about lenz law saying the capacitor voltage value should be 3 times the total dc voltage and the cap value in uf depends on freq switching
read this link about inductors how they work....http://williamson-labs.com/
and more what kind of core u have what is your output..ac/dc current/ voltage now ..what do u want from it next ?