On Wednesday 19 April 2017 14:41:35 you wrote:

SNIP

>

> What about the circuit from my attachment? The windings labeled with DC

> and switched anti-series, so that the AC voltage componsates. The AC

> output winding is switched in series, so that the voltage doubles. When

> the two other legs are saturated there is still a magnetic conductive

> leg in the center, like a rod. This could still provide enough L for the

> primary coil. The DC H fields compensate in the center leg. Could work,

> right?

Your circuit is a magnetic amplifier.

This book is useful.

https://archive.org/details/MagneticAmplifiers

73

Claudio ik2pii

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