AC Current Source

Ideal sinusoidal current source

• 

Libraries:
Simscape / Foundation Library / Electrical / Electrical Sources

Description

The AC Current Source block represents an ideal current source that maintains sinusoidal current through it, independent of the voltage across its terminals.

The output current is defined by the following equation:

$$I=I_0\cdot \sin (2\pi \cdot f\cdot t+\phi )$$

where:

• I is current.

• I₀ is peak amplitude.

• f is frequency.

• φ is phase shift.

• t is time.

The positive direction of the current flow is indicated by the arrow.

Examples

Nonlinear Inductor

An implementation of a nonlinear inductor where the inductance depends on the current. For best numerical efficiency, the underlying behavior is defined in terms of a current-dependent flux. In order to differentiate the flux to get voltage, a magnetizing lag is included. Simulation results are relatively insensitive to this lag provided that it is at least an order of magnitude faster than the fastest frequency of interest. Parameters for the source and lag are defined in the MATLAB® workspace so that the expected voltage can be calculated analytically.

• Open Model

Ports

Conserving

+ — Positive terminal

electrical

Electrical conserving port associated with the source positive terminal.

- — Negative terminal

electrical

Electrical conserving port associated with the source negative terminal.

Parameters

Peak amplitude — Peak current amplitude

1 A (default) | scalar

Peak current amplitude.

Phase shift — Phase shift in angular units

0 deg (default) | scalar

Phase shift in angular units.

Frequency — Current frequency

60 Hz (default) | positive scalar

Current 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.

Extended Capabilities

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

Version History

Introduced in R2007a