Inductor

An ideal inductor.

  • electrical
  • Gradara equations
  • 2 ports
  • 1 parameter
BlockInductorKindinductorLibraryElectrical

Description

An ideal linear inductor. The voltage across it is proportional to the rate of change of the current through it.

Example

RC and RL transients A 10 V step charges a capacitor through a resistor, and another builds current in an inductor through a conductor.

Step 10 VR 1 kΩC 100 µFCapacitor voltageGroundStep 10 V (RL)G 0.1 SInductor currentL 1 HGround (RL)
In Gradara, select a Inductor block and press F1, then choose Open example. It opens as a new model in My models, ready to run.

Also in this example:Voltage sensorCurrent sensorGroundResistorCapacitorConductorStep voltage

Ports

Conserving terminals 2

  • +pelectrical

    Positive pin. Current into p is counted as positive.

  • −nelectrical

    Negative pin.

Parameters

  • InductanceL0.001 H

    ≥ 1e-12

    Inductance, in henries. At least 1 pH.

Equations

Modelica
v = p.v − n.v
i = p.i, p.i + n.i = 0
L · di/dt = v
i(0) = 0

Assumptions and limitations

  • Starts with zero current; the initial current is fixed and cannot be changed.
  • No saturation, winding resistance, or core losses. For saturation, use Saturating inductor.

Tips

  • Do not break an inductor’s current path with an ideal switch or open circuit: the current cannot jump to 0. Give it a freewheeling path, such as a diode.

Used in

These larger examples use it too. Open them from Examples in the app.

  • Buck converter · Ideal switches
  • 480 VAC → 24 VDC flyback

See also

Select a block in Gradara and press F1 to open its page offline.