John Popelish wrote:
John Popelish wrote:
(snip)
But if you just wire it up as half of that star (only one side of each
center tapped pair), you can common the lopsided center and drive each
of the 4 ends with one of your half bridges and have the same as the
last.

But if you tie the 4 'center' ends together, but float this node, the
ripple will be reduced as this node finds its voltage as a combination
of the 4 drive phases returning through each other. instead of through
the common center node. I could be all wet, here. I admit that 4
phases makes my head hurt.

This doesn't work. you get two large and two smaller phase currents.

But you can tie the 'center' end of say, the 0 and 45 degree phases, and
the 'center' end of the 90 and 135 degree phases ans two separate
floating nodes, and get phase sharing effect for these pairs that keeps
all the phase currents equal.

Damn. Forget that. With only two windings in series, their
currents are certainly equal, because they are identical in
all respects, including phase.