DC,
In an attempt to cure the overheating of zobel resistor the first time I power ApexD200.2 (original one). I installed a 5k trimmer for the freq oscillator, I had it set step by step (I think I managed to reach 3k). There was no noticeable temp changes on the zobel resistor and to some key components like fets, inductor fet driver etc. I do however found out that I had mistakeny placed a 473 value for the output cap, and when I changed it back to 474 and presto! Problem solved!
With Manoj changes I haven't done that yet, I'm not really so sure if changing the Fsw will make noticeable changes with the heating problem. I have yet to revert back to 474 cap and test the amp again.
Regards!
BTW Had you manage to test Manoj mod? The changes is a more recent approach using IR2110 (15v zener diode as internal clamp for VB & VS pin)
I'm also working on a new lay-out to cancel EMI problem (hopefully) on half filter butterworth (LPF) when using ferrite inductor.
In an attempt to cure the overheating of zobel resistor the first time I power ApexD200.2 (original one). I installed a 5k trimmer for the freq oscillator, I had it set step by step (I think I managed to reach 3k). There was no noticeable temp changes on the zobel resistor and to some key components like fets, inductor fet driver etc. I do however found out that I had mistakeny placed a 473 value for the output cap, and when I changed it back to 474 and presto! Problem solved!
With Manoj changes I haven't done that yet, I'm not really so sure if changing the Fsw will make noticeable changes with the heating problem. I have yet to revert back to 474 cap and test the amp again.
Regards!
BTW Had you manage to test Manoj mod? The changes is a more recent approach using IR2110 (15v zener diode as internal clamp for VB & VS pin)
I'm also working on a new lay-out to cancel EMI problem (hopefully) on half filter butterworth (LPF) when using ferrite inductor.
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"Roks" is a local e-parts store. The green toroid is hard to identify since it comes as surplus component.
@remle114,
how did you manage to make the cut? I had the same toroid tried to make a cut also, i used a saw file and a steel saw but It won't get through with the cut the result was a terrible scratch in the surface
@remle114,
how did you manage to make the cut? I had the same toroid tried to make a cut also, i used a saw file and a steel saw but It won't get through with the cut the result was a terrible scratch in the surface
"Roks" is a local e-parts store. The green toroid is hard to identify since it comes as surplus component.
@remle114,
how did you manage to make the cut? I had the same toroid tried to make a cut also, i used a saw file and a steel saw but It won't get through with the cut the result was a terrible scratch in the surface
Hi Abetir this is the tool i used to cut those toroid
Protection circuit use 0,05R with IGBT start at 25A (4000VA), use 0,1R with MOSFETs.
What about changing R10 to 2k for FETs and keep 0.05R for power dissipation reasons?
