# Network Coupler (Inductor)

**Libraries:**

Simscape /
Utilities /
Network Couplers

## Description

The Network Coupler (Inductor) block uses a line inductance to break a network connection. It can be useful for breaking both AC and DC network connections.

Both of the port interfaces of the Network Coupler (Inductor) block are implemented as current sources. Therefore:

You cannot connect other inductors or current sources in series with the Network Coupler (Inductor) block because this would cause an Index-2 topology (for more information, see Avoiding Numerical Simulation Issues). If you can, lump all series inductances into one block and split the network using this block.

The connection made with the Network Coupler (Inductor) block conveys no referencing information. If you split all connections between two networks using this block, then both networks must contain at least one Electrical Reference block. When this is not the case, consider using one of the other electrical coupler blocks for at least one of the connections.

### Working with the Block on the Model Canvas

When you add the block to your model and double-click it, the Network Coupler (Inductor) subsystem opens.

The Port 1 Interface block contains the dynamics that break the algebraic loop. Double-click this block to set all of the Network Coupler (Inductor) subsystem parameters and view the derived values.

The rate transition blocks are, by default, commented through. Uncomment them if at least one of the coupled networks is running fixed step.

### Using the Derived Values to Estimate Block Parameters

On the **Analysis** tab of the Port 1 Interface block dialog box, the **Derived values** section contains a list of recommended values that you can use when specifying block parameters. For example, use the **Recommended max discrete sample time (s)** derived value to verify that your **Port 1 network discrete sample time (s)** and **Port 2 network discrete sample time (s)** parameter values are within acceptable limits.

The derived values list is based on the chosen block configuration.

If both networks are running variable step, then the **Analysis** tab
is empty, and there are no restrictions on the inductance value you specify.

If one or both networks are running fixed step, then the resulting RL time constant
arising from the inductor and connected network resistance must not be faster than can be
adequately sampled by the fixed step rate. The **Analysis** tab provides
assistance on the recommended maximum sample time, based on the inductance value and the
approximate connected network resistance value specified. If the resistances of the two
networks differ, provide the lower value.

The **Update** button lets you recalculate
the derived values after you change the parameters of the connected networks.

## Ports

### Conserving

## Parameters

## Extended Capabilities

## Version History

**Introduced in R2022a**