Inductor

Linear inductor in electrical systems

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Libraries:
Simscape / Foundation Library / Electrical / Electrical Elements

Description

The Inductor block models a linear inductor, described with the following equation:

$$V=L\frac{dI}{dt}$$

where:

• V is voltage.

• L is inductance.

• I is current.

• t is time.

The Series resistance and Parallel conductance parameters represent small parasitic effects. The series resistance can be used to represent the DC winding resistance or the resistance due to the skin effect. Simulation of some circuits may require the presence of a small parallel conductance. For more information, see Modeling Best Practices.

Connections + and – are conserving electrical ports corresponding to the positive and negative terminals of the inductor, respectively. The current is positive if it flows from positive to negative, and the voltage across the inductor is equal to the difference between the voltage at the positive and the negative terminal, V(+) – V(–).

Variables

To set the priority and initial target values for the block variables prior to simulation, use the Initial Targets section in the block dialog box or Property Inspector. For more information, see Set Priority and Initial Target for Block Variables.

Nominal values provide a way to specify the expected magnitude of a variable in a model. Using system scaling based on nominal values increases the simulation robustness. Nominal values can come from different sources, one of which is the Nominal Values section in the block dialog box or Property Inspector. For more information, see Modify Nominal Values for a Block Variable.

Examples

Permanent Magnet DC Motor

This model is based on a Faulhaber Series 0615 DC-Micromotor. The parameters values are set to match the 1.5V variant of this motor. The model uses these parameters to verify manufacturer-quoted no-load speed, no-load current, and stall torque.

• Open Model

Ports

Conserving

+ — Positive terminal

electrical

Electrical conserving port associated with the inductor positive terminal.

- — Negative terminal

electrical

Electrical conserving port associated with the inductor negative terminal.

Parameters

Inductance — Inductance of the inductor

1e-6 H (default) | positive scalar

Inductance value.

Series resistance — Small parasitic effects

0 Ohm (default) | nonnegative scalar

Represents small parasitic effects. The series resistance can be used to represent the DC winding resistance or the resistance due to the skin effect.

Parallel conductance — Small parasitic effects

1e-9 1/Ohm (default) | nonnegative scalar

Represents small parasitic effects. Simulation of some circuits may require the presence of a small parallel conductance.

Extended Capabilities

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

Version History

Introduced in R2007a