Scott 'T' transformer
QuickField simulation example
Transformer consists of 2 single phase transformers connected in a special way. The unit allows to convert 3-phase voltage to two single-phase voltages.
Problem Type
Plane-parallel problem of AC magnetics.
Geometry
Given
Voltage (RMS) U=36 V,
Frequency f=50 Hz,
Core permeability μ=1000,
Copper conductivity g=56 MS/m,
Transformer1: N1=168 (with central tap), N2=168,
Transformer2: N1=145, N2=168.
Task
Calculate input currents and output voltages in open circuit mode.
Solution
The large resistance R=10 kOhm is connected to the secondary winding. It is used to measure output voltage.
Results
| Winding name | Voltage, U | Phase current, I |
|---|---|---|
| A | 36√2 @ 0° V | 1.95 @ -89° A |
| B | 36√2 @ 120° V | 1.94 @ 31° A |
| C | 36√2 @ 240° V | 1.94 @ 150° A |
| p | 88 @ 0° V | - |
| q | 88 @ 90° V | - |
* Reference: http://en.wikipedia.org/wiki/Scott-T_transformer
- Video: Scott 'T' transformer. Watch on YouTube
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