Hi,
Just trying to follow through the logic but hitting a barrier with C10. It's a rectification circuit with switched in impedance matching capacitors.
The skhottkys are rated at 40V, the capacitors are 35V, the C10 is oddly 16V - and has polarity.
K1-3 are relays. The TVS is 170V and must be the wrong value.
There's a device N$50 which I've not seen before.
The back-to-back capacitors switch in at different AC Hz and pass the AC while boosting the edges. It's a clever technique. If they don't get switched in at the correct frequency they become blocking. I assume therefore one of these is active at any point.
But C10, that's a curiosity. If the [DYN ~] left side is positive it would charge but the 16V rating seems to be limiting. If the left side becomes negative C10 is shorted removing the need for D7.
The TVS is too high but perhaps those filter caps are removing the circuit completely once a given frequency (which translates into a max voltage) is reached.
Can you do better?
Regards,
Andrew
Just trying to follow through the logic but hitting a barrier with C10. It's a rectification circuit with switched in impedance matching capacitors.
The skhottkys are rated at 40V, the capacitors are 35V, the C10 is oddly 16V - and has polarity.
K1-3 are relays. The TVS is 170V and must be the wrong value.
There's a device N$50 which I've not seen before.
The back-to-back capacitors switch in at different AC Hz and pass the AC while boosting the edges. It's a clever technique. If they don't get switched in at the correct frequency they become blocking. I assume therefore one of these is active at any point.
But C10, that's a curiosity. If the [DYN ~] left side is positive it would charge but the 16V rating seems to be limiting. If the left side becomes negative C10 is shorted removing the need for D7.
The TVS is too high but perhaps those filter caps are removing the circuit completely once a given frequency (which translates into a max voltage) is reached.
Can you do better?
Regards,
Andrew