XFMRP implements a linear model of a physical transformer. This model accounts for core and winding resistive losses as well as parasitic winding capacitances.

Name | Description | Unit Type | Default |
---|---|---|---|

ID | ID | Text | X1 |

N | Turns ratio Secondary:Primary | 1 | |

Lm | Magnetizing inductance | Inductance | 300 nH |

Rc | Core loss resistance | Resistance | 1000 Ohm |

k | Coupling coefficient | 0.9 | |

Rp | Primary loss resistance | Resistance | 10 Ohm |

Rs | Secondary loss resistance | Resistance | 10 Ohm |

Cp | Primary capacitance | Capacitance | 30 pF |

Cs | Secondary capacitance | Capacitance | 30 pF |

Ci | Interwinding capacitance | Capacitance | 10 pF |

**N.** The ratio of secondary to primary turns.

**Lm.** Magnetizing inductance of primary winding is
defined as a product of primary open-circuit inductance Lp and coupling coefficient k:
Lm= Lp*k.

**Lm(1/k-1), Rs/(N*N), ** - See "Topology". Series
inductances in a T-circuit are leakage inductances. Series resistance in the right
shoulder of a T-circuit is equivalent resistance of secondary winding. See [1] for
transformer equivalent circuit details.

Implements physical transformer with primary coil between nodes 1 and 2 and secondary coil between nodes 3 and 4. An equivalent circuit of XMRFP is implemented after [1] with resistive losses and parasitic capacitances added. XMRFP incorporates an ideal transformer model (XFMR), so similar to XFMR DC, it is also transformed with this element. If you do not want to transform DC, you need to add capacitors on either side of the model to block DC.

This element does not have an assigned layout cell. You can assign artwork cells to any element. See “Assigning Artwork Cells to Layout of Schematic Elements” for details.