Damped DM Inductor

Resistors are commonly placed in parallel with inductor windings to damp the resonance that occurs between the inductor and capacitance elsewhere in the circuit.  The Damped Differential Mode Inductor model provides for resistance in parallel with the differential mode inductor, as well as leakage inductance, inter-winding capacitance, and winding resistance.

Leakage inductance is specified by entering a value for leakage inductance or by entering a coupling factor.  A coupling factor of 1 equates to 100% coupling; 0.99 equates to 99% coupling, etc.

The Damped Differential Mode Inductor is a magnetically coupled four-terminal component.  The number of turns is equal, upper and lower, so the voltage across the upper windings is equal, but opposite polarity, to the voltage across the lower windings.  Impedance across the inductor windings varies over frequency.

The Damped Differential Mode Inductor is available for series schematic diagram components.  Since the Damped Differential Mode Inductor is a four-terminal component it occupies two series component positions simultaneously.  If another component already exists in either series component position it will be replaced by the Damped Differential Mode Inductor.

To calculate and graph the impedance of the Damped Differential Mode Inductor component over the frequency range selected on the Frequency Range form, click the Graph button on the Component Library form toolbar or select menu Tools | Graph.

To change a Damped Differential Mode Inductor value, select the present value, enter the desired value, and click the OK button.  When the OK button is clicked the Damped Differential Mode Inductor is placed on the schematic diagram.  If the Close button is clicked the Component Library form closes with no changes to the schematic diagram.

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