Documentation

Current Source

Ideal three-phase current source

Library

Sources

Description

The Current Source block models an ideal three-phase current source that maintains sinusoidal currents of the specified magnitude through its terminals, independent of the voltage across the source.

The output current is defined by the following equations:

I0=2iphase_rms

ia=I0sin(2πft+φ)

ib=I0sin(2πft+φ120)

ic=I0sin(2πft+φ+120),

where:

  • I0 is the peak phase current.

  • iphase_rms is the RMS phase current.

  • ia, ib, ic are the respective phase currents.

  • f is the frequency.

  • φ is the phase shift.

  • t is the time.

The arrow indicates the positive direction of the current flow. The source has a wye configuration, and port n provides a connection to the center of the wye. Port ~ is an expandable three-phase port representing the three phases, a, b, and c.

Parameters

Current (phase RMS)

RMS phase current. The default value is 100/sqrt(2), or 70.7107, A.

Phase shift

Phase shift in angular units. The default value is 0 deg.

Frequency

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. The default value is 60 Hz.

Ports

The block has the following ports:

~

Expandable three-phase port

n

Electrical conserving port associated with the center of the wye

Introduced in R2013b

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