Hello,
I'm designing a small flyback transformer (~30W), single output. The issue of my design is the input common mode voltage, that's specified as "up to 1500V indefinitely".
Now, I can easily get 1500V rated transformers, but the rating is usually 1500V for 1 second or 1 minute.
Alternatively I can get 4kV isolation for 1 second/minute, but this may be overkill.
What I am curious about is how I calculate/derate to the max. isolation voltage for indefinite usage (or just 1 day, if easier).
I've been referred to the IEC 61558-2 standard, but like everybody else I don't want to buy it, if it doesn't answer my question (standards rarely do)
Does anyone have experience with this type of issue?
Regards!
I'm designing a small flyback transformer (~30W), single output. The issue of my design is the input common mode voltage, that's specified as "up to 1500V indefinitely".
Now, I can easily get 1500V rated transformers, but the rating is usually 1500V for 1 second or 1 minute.
Alternatively I can get 4kV isolation for 1 second/minute, but this may be overkill.
What I am curious about is how I calculate/derate to the max. isolation voltage for indefinite usage (or just 1 day, if easier).
I've been referred to the IEC 61558-2 standard, but like everybody else I don't want to buy it, if it doesn't answer my question (standards rarely do)
Does anyone have experience with this type of issue?
Regards!