Main Content

DC Voltage Source

Ideal constant voltage source

  • DC Voltage Source block

Simscape / Foundation Library / Electrical / Electrical Sources


The DC Voltage Source block represents an ideal voltage source that is powerful enough to maintain specified voltage across its terminals regardless of the current flowing through the source.

You specify the output voltage by using the Constant voltage parameter, which can be positive or negative.

Connections + and - are conserving electrical ports corresponding to the positive and negative terminals of the voltage source, respectively. The current is positive if it flows from positive to negative, and the voltage across the source is equal to the difference between the voltage at the positive and the negative terminal, V(+) – V(-).



expand all

Electrical conserving port associated with the source positive terminal.

Electrical conserving port associated with the source negative terminal.


expand all

Voltage across the source. You can specify positive or negative values.

Extended Capabilities

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

Version History

Introduced in R2007a