Transformers are modeled by an ideal transformer, adding primary
and secondary winding resistances and stray inductances.
All transformers extend from the base model
PartialTransformer, adding the primary and secondary
connection.
VectorGroup defines the phase shift between
primary and secondary voltages, expressed by a number phase
shift/30 degree (i.e., the hour on a clock face). Therefore each
transformer is identified by two characters and a two-digit number,
e.g., Yd11 ... primary connection Y (star), secondary connection d
(delta), vector group 11 (phase shift 330 degree)
With the "supermodel" Transformer the user may choose
primary and secondary connection as well as the vector group.
It calculates winding ratio as well as primary and secondary
winding resistances and stray inductances, distributing them
equally to primary and secondary winding, from the following
parameters:
Please pay attention to proper grounding of the
primary and secondary part of the whole circuit.
The primary and secondary starpoint are available as connectors, if
the connection is not delta (D or d).
In some cases (Yy or Yz) it may be necessary to ground one
of the transformer's starpoints even though the source's and/or
load's starpoint are grounded; you may use a reasonable high
earthing resistance.
Name | Description |
---|---|
Yy | Transformers: primary Y / secondary y |
Yd | Transformers: primary Y / secondary d |
Yz | Transformers: primary Y / secondary zig-zag |
Dy | Transformers: primary D / secondary y |
Dd | Transformers: primary D / secondary d |
Dz | Transformers: primary D / secondary zig-zag |