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DC Voltage Source

Ideal constant voltage source


Electrical Sources


The DC Voltage Source block represents an ideal voltage source that is powerful enough to maintain specified voltage at its output 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(–).


Constant voltage

Output voltage. You can specify positive or negative values. The default value is 1 V.


The block has the following ports:


Electrical conserving port associated with the source positive terminal.


Electrical conserving port associated with the source negative terminal.

Introduced in R2007a

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