Single phase two winding transformer
This section describes single phase two winding transformer
The single-phase two-winding transformer models two coupled windings on the same core. The magnetization inductance Lm can be linear or with saturation, it is modeled on the primary side of the transformer. Core losses are modeled as Rm resistance located on the primary side of the transformer. Also, it is possible to neglect Lm and Rm by selecting Lm/Rm neglected in the Core model property. Finally, Hysteresis can also be simulated for slower dynamics. For more information, please refer to the Core model section.
The schematic symbol and input parameters for the single-phase two-winding transformer block are given in Table 1.
component | component dialog window | component parameters |
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Single phase two winding transformer |
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A schematic block diagram of the single phase two winding transformer block with the corresponding component arrangement and naming is shown in Figure 1.
Embedded coupling
There are two possible options for embedded coupling in the single phase two winding transformer, Ideal Transformer based coupling and TLM coupling.
If Embedded coupling is set to Ideal Transformer, Ideal Transformer based coupling will be placed between two windings of transformer. In Figure 2 is given a schematic representation of transformer's equivalent circuit when Embedded coupling is set to Ideal Transformer.
If Embedded coupling is set to TLM, secondary winding inductor (L2) will be replaced with TLM coupling component. Inductance will be divided between coupling and embedded inductors (inductors will be hidden in the TLM). TLM to embedded inductors ratio can be determined by compiler, but also it can be specified explicitly. If Automatic option is selected, ratio will be determined by discretization method. If Manual option is selected, ratio can be explicitly set to meet user requirements. For more information on TLM couplings please refer to Core couplings - TLM. In Figure 3 is given a schematic representation of transformer's equivalent circuit when Embedded coupling is set to TLM.
State variable naming for the single-phase two-winding transformer (internal to the component)
Analog output variable name | Description |
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(name).L1 | Primary winding current |
(name).L2 | Second winding current |
(name).Lm | Magnetizing current |