@BradtheRad , Thank you for the answer!
For example - resistive load.
An example that I understand:
Vin: 800VDC, Vout range: 200-500VDC, transform ratio N = 1.6.
Initially, the transformer reduces the output voltage to 500 Volts (800 / 1.6), then we can adjust it even lower through the phase shift, up to 200 Volts. Voltage transfer ratio <=1, M = (N * Vout) / Vin.
An example I don't understand:
Vin: 800VDC, Vout range: 200-1000VDC (1000VDC > 800VDC!), transform ratio = 1.2.
Initially, the transformer reduces the output voltage to
≈ 667 Volts (800 / 1.2), then we can adjust it even lower through the phase shift, up to 200 Volts. OK! M <=1. Now we want to step up the voltage to 1000VDC. That > input voltage (800). M > 1.
How to achieve this?
I did a phase shift in LTspice, and there I could only reduce the voltage, that is, M <=1.
It turns out that there is something else besides phase shift control? If so, then what?
I haven't found any information on this yet.