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Yes, my 8A/16A figures were what I saw without expanding the waveform. Using CTRL-left click, I see 5.9124 A, but that includes the inrush current at t=0+. Is there any way to change the 'Interval start', other than changing the sim time to omit the inrush current? Doing that, I get 5.8583 A, so we are in violent agreement on that point.

After adding Rser=1 ohm to V9:

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The average current from V9 is 5.858 Amps, compared to the 8 Amps you said yours had.? Our simulations should not have differed by more than 2 Amps!? Something is wrong.? (Unless you eyeballed your "8 Amps" without measuring it.)? The current waveform there does look kind of sinusoidal with about 8 Amps peak amplitude, varying from -1 A to about +16.5 A.? But it is a highly distorted sinewave and that makes a big difference; the average is not in the middle.? LTspice says the average is 5.858 A DC, in my simulation.

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The average power from V9 simulates as 507 W, which is nowhere near the roughly 800 W that you estimated.? Again, was that by ayeballing, or measuring it?

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At the load, I measure 132 V DC as you did, plus some ripple.? Average power there is 385 W, so the converter loses 122 W to heat (76% efficiency).? That is not so bad, but again most of it is in M4, M5, M6, and M7, which can be reduced by building some dead-band into their gate waveforms.

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Simulating with a discrete 1 ohm resistor instead of Rser=1, I have 640 W sourced by V9 and 108 W dissipated by the 1 ohm resistor.? Between the two, that is 532 W supplied by V9+1ohm to the rest of the circuit.? It is not quite the same as the 507 W when Rser was internal, but I don't know why (it should not have differed, right?).? Will check into that later.

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In any event, with LTspice XVII, the power losses of the circuit are reasonable, and can be reduced further.? If LTspice 24 tells you a different story, that needs to be understood.? If LTspiceXVII says 122 W is lost and LTspice24 says 400 W is lost, that is a big problem.

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Andy

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