# RLC (Three-Phase)

Three-phase impedance

**Libraries:**

Simscape /
Electrical /
Passive /
RLC Assemblies

## Description

The RLC (Three-Phase) block models a three-phase impedance with two three-phase connections. Each of the three identical impedance components can include any combination of a resistor (R), capacitor (C), and inductor (L), connected in series or in parallel.

Define the values for the R, L, and C components by specifying the appropriate block
parameters. Do not set the parameter values to zero or infinity to remove terms;
instead, select the correct option for the **Component structure**
parameter.

For certain combinations of R, L, and C, for some circuit topologies, specify parasitic resistance or conductance values that help the simulation to converge numerically. These parasitic terms ensure that an inductor has a small parallel resistive path and that a capacitor has a small series resistance.

### Block parameterization

The following two tables list the block parameters for each **Component
structure**, based on the selected
**Parameterization** option:

Specify by rated power

Specify component values directly

Component Structure | Main Parameters | Parasitics Parameters | Initial Conditions Parameters |
---|---|---|---|

| Resistance | None | None |

| Inductance | Parasitic parallel conductance | Initial inductor current [ Ia Ib Ic ] |

| Capacitance | Parasitic series resistance | Initial capacitor voltage [ Va Vb Vc ] |

| Resistance Inductance | Parasitic parallel conductance | Initial inductor current [ Ia Ib Ic ] |

| Resistance Capacitance | None | Initial capacitor voltage [ Va Vb Vc ] |

| Inductance Capacitance | Parasitic parallel conductance | Initial inductor current [ Ia Ib Ic ] Initial capacitor voltage [ Va Vb Vc ] |

| Resistance Inductance Capacitance | Parasitic parallel conductance | Initial inductor current [ Ia Ib Ic ] Initial capacitor voltage [ Va Vb Vc ] |

| Resistance Inductance | None | Initial inductor current [ Ia Ib Ic ] |

| Resistance Capacitance | Parasitic series resistance | Initial capacitor voltage [ Va Vb Vc ] |

| Inductance Capacitance | Parasitic series resistance | Initial inductor current [ Ia Ib Ic ] Initial capacitor voltage [ Va Vb Vc ] |

| Resistance Inductance Capacitance | Parasitic series resistance | Initial inductor current [ Ia Ib Ic ] Initial capacitor voltage [ Va Vb Vc ] |

### Variables

Use the **Variables** tab to specify the priority and initial
target values for the block variables before simulation. For more information, see
Set Priority and Initial Target for Block Variables.

The **Variables** tab is not visible if you set
**Component structure** to `R`

.

## Ports

### Conserving

## Parameters

## Extended Capabilities

## Version History

**Introduced in R2013b**