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#Ltspice for mac examples of transient analysis how to#
#Ltspice for mac examples of transient analysis software#
#Ltspice for mac examples of transient analysis free#

You can find them in the folder: examples\educational in the LTspice installation’s folder.

LTspice comes with a variety of examples which are a good start point for any analysis.

One for the upper branch and for the lower one: The two hysteresis loop branches can be modeled with two equations. Images used courtesy of the NDT Resource Center and LTWiki The size and shape of the hysteresis loops are directly dependent upon the type of magnetic material.įigure 2. Hysteresis loop of an inductor. The most relevant points of a hysteresis loop are saturation (in both directions), retentivity, coercivity. The relationship between the flux density (B) and the field intensity (H) is shown in the hysteresis loop.

#Ltspice for mac examples of transient analysis software#

Step 3: Create a circuit model The third step is to create a circuit model using the software tool.

#Ltspice for mac examples of transient analysis free#

Magnetic materials tend to stay magnetized after having experienced a field force, even after this has been removed. LTspice is a free and user-friendly version of SPICE that can run on Windows and Mac platforms.

#Ltspice for mac examples of transient analysis how to#

Once we know how to model ideal transformers, we can start including complex parameters in the simulation model, so we go towards a real behavior. An ideal transformer has mutual coupling equal to one, while real ones present lower values, as it is later explained.įigure 1. The ideal transformer in LTspice AC Analysis The figure shows an example for an ac analysis. Same for the input and output resistance of the circuit. The simulated gain, -19.6, is close to the calculated value -20 which ignored the effect of r o and made other simplifications. The phase dots will automatically show up once you define the directive. EE 105 LTSpice Output from the DC transfer function analysis. To set a transformer in LTpsice, place two inductances L1, L2 and then, define the Mutual Coupling (K) through a Spice directive. Practical examples are provided, as well as the files to replicate all the simulations.Īn ideal transformer consists of at least two windings that are mutually coupled.

Simulating the real characteristics of transformers is critical in the design of switched-mode power supplies (SMPSs). This article shows how to implement non-linear models and how to extend them to any circuit. However, there are some techniques to do it. While LTspice comes with models to simulate Chan inductors and other non-linear models, it is not possible to simulate arbitrary coupled inductors (transformers). In order to get it, we can make use of the Chan model, which has already shown great accuracy. We’ll cover Awaves through some examples later, but you can see the results of your analysis here by selecting Transient: ee105 spice tutorial example 1 - simple rc circuit in the Results Browser and double-clicking vs and vo to plot them in the graph. When designing circuits that contain inductors we need to take into account real phenomena such as hysteresis or inductor saturation. We saw three options to model inductors, each with different complexity and accuracy.

In a previous article, we learned how to model inductors with LTspice.