In a nutshell, it's like a UPS with 3 Phase output (per "Static" Converters).
The 1 Phase AC may simply have a 3rd line created, or the entire AC is converted to a 3 Ø system.
Either way, AC is converted to DC, which is then Inverted to AC.
If this was a Rotary Converter, it would be a 1 Phase Motor driving a 3 Phase Genny (Generator).
Better explainations may be done by others, or if I get proper data, I'll post it.
Scott s.e.t.
p.s. pay no attention to the following text. Just trying out some extended characters.
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