AC Voltage Source

R2026b

Ideal constant voltage source

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AC Voltage 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 AC Voltage Source block represents an ideal voltage source that maintains sinusoidal voltage across its output terminals, independent of the current flowing through the source.

The output voltage is defined by the following equation:

$$V=V_0\cdot \sin (2\pi \cdot f\cdot t+\phi )$$

where:

• V is voltage.

• V₀ is peak amplitude.

• f is frequency.

• φ is phase shift.

• t is time.

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(-).

Examples

Nonlinear Bipolar Transistor

An implementation of a nonlinear bipolar transistor based on the Ebers-Moll equivalent circuit. R1 and R2 set the nominal operating point, and the small signal gain is approximately set by the ratio R3/R4. The 1uF decoupling capacitors have been chosen to present negligible impedance at 1KHz. The model is configured for linearization so that a frequency response can be generated.

• Open Model

Ports

Conserving

+ — Positive terminal

electrical

Electrical conserving port associated with the source positive terminal.

Programmatic Use

Port: p

- — Negative terminal

electrical

Electrical conserving port associated with the source negative terminal.

Programmatic Use

Port: n

Parameters

Peak amplitude — Peak voltage amplitude

1 V (default) | scalar

Peak voltage amplitude.

Programmatic Use

Parameter: amp

Phase shift — Phase shift in angular units

0 deg (default) | scalar

Phase shift in angular units.

Programmatic Use

Parameter: shift

Frequency — Voltage frequency

60 Hz (default) | positive scalar

Voltage frequency, specified in Hz or units directly convertible to Hz (where Hz is defined as 1/s). For example, kHz and MHz are valid units, but rad/s is not.

Programmatic Use

Parameter: frequency

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/AC Voltage Source"

Example: add_block("fl_lib/Electrical/Electrical Sources/AC Voltage 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