Phase Technology Phase Perfect PT007, Operation & Installation Manual

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V2.1
THEORY OF OPERATION
L1 and L2 of the single-phase input pass directly through the phase converter to provide
two legs of the three-phase output. The input module charges a DC bus from the input
lines. The output module uses power from the DC bus to generate the third leg of the three-
phase output. The third leg is generated to limit voltage imbalance between the three legs
to ≤ 2%. Voltage imbalance is calculated according to the NEMA MG1 standard.
𝑉
𝑖𝑏
=
𝑉
max 𝑑𝑖𝑓𝑓𝑒𝑟𝑒𝑛𝑐𝑒
𝑉
𝑎𝑣𝑔
Where:
𝑉
𝑎𝑣𝑔
=
𝑉
𝑇1𝑇2
+ 𝑉
𝑇2𝑇3
+ 𝑉
𝑇3𝑇1
3
𝑉
max 𝑑𝑖𝑓𝑓𝑒𝑟𝑒𝑛𝑐𝑒
= 𝑀𝐴𝑋 𝑜𝑓 (|𝑉
𝑇1𝑇2
− 𝑉𝑎𝑣𝑔|, |𝑉
𝑇2𝑇3
− 𝑉𝑎𝑣𝑔|, |𝑉
𝑇3𝑇1
− 𝑉𝑎𝑣𝑔|)
Block Diagram
The diagram in
Figure 1 illustrates the basic design schematic of the Phase Perfect Digital
Phase Converter.
Figure 1
– Phase Perfect Digital Phase Converter Schematic