Voltage-Controlled Current Source

R2026b

Linear voltage-controlled current source

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Voltage-Controlled Current Source block

To add a block to a model, double-click the canvas and start typing the block name. Then, select the block from the list.

Libraries:
Simscape / Foundation Library / Electrical / Electrical Sources

Description

The Voltage-Controlled Current Source block models a linear voltage-controlled current source, described with the equation

$$I=K·\left(V(+)-V(-)\right)$$

where:

• I is the output current.

• K is the transconductance.

• V(+) and V(-) are the voltages at the + and - control ports.

The + and - ports on the left side of the block are the control ports. To use the block, connect the control ports to the control voltage source. The two ports on the right side of the block are the output ports. They generate the output current. The arrow indicates the positive direction of the current flow.

Variables

To set the priority and initial target values for the block variables prior to simulation, use the Initial Targets section in the block dialog box or Property Inspector. For more information, see Set Priority and Initial Target for Block Variables.

Nominal values provide a way to specify the expected magnitude of a variable in a model. Using system scaling based on nominal values increases the simulation robustness. Nominal values can come from different sources, one of which is the Nominal Values section in the block dialog box or Property Inspector. For more information, see Modify Nominal Values for a Block Variable.

Ports

Conserving

+ — Positive control terminal

electrical

Electrical conserving port associated with the positive control terminal.

Programmatic Use

Port: p1

- — Negative control terminal

electrical

Electrical conserving port associated with the negative control terminal.

Programmatic Use

Port: n1

head — Output current positive terminal

electrical

Electrical conserving port associated with the output current positive terminal.

The port name is not visible in the block icon, but you can see this name in the underlying source file by clicking the Source code link in the Description tab of the block dialog box.

Programmatic Use

Port: head

tail — Output current negative terminal

electrical

Electrical conserving port associated with the output current negative terminal.

The port name is not visible in the block icon, but you can see this name in the underlying source file by clicking the Source code link in the Description tab of the block dialog box.

Programmatic Use

Port: tail

Parameters

Transconductance K — Ratio of change in output current to change in control voltage

1 1/Ohm (default) | scalar

The change in output current divided by the change in input voltage that causes it.

Programmatic Use

Parameter: K

Programmatic Use: Add Block

To add the block programmatically, use the add_block function with one of these library block paths as the source.

"fl_lib/Electrical/Electrical Sources/Voltage-Controlled Current Source"

Example: add_block("fl_lib/Electrical/Electrical Sources/Voltage-Controlled Current Source","myModel/myBlock",MakeNameUnique="on")

For information about programmatic access to individual block parameters, see the Programmatic Use section of parameter descriptions on this page.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Version History

Introduced in R2007a