Femm magnetic free download

Also, the initial design depended a great deal on the available magnet dimensions, since purchasing custom-made magnets would prove time and money consuming. Table 1 lists the magnetic properties specific to that grade of NdFeB.

Also, the stator and rotor core consist of two stages each stage contains of 9 holes slots for stator and 8 for rotor,on which the magnets NdFeB 38 are put inside them as shown in fig. Model Design 1. R The Finite Element Method is a numerical analysis method of solving systems governed by differential equations.

It is used to predict the behavior of many different types of physical systems, by enabling the conversion of a boundary value problem into a system of equations that is suited for computer resolution. The simulation was configured a series of permanent magnets oblique angle to get a positive force in the direction of Fx. Where the string is made up of four parts, a two fixed outer series represent the stator while the two inner moveable series represents the rotor. Also Number of magnets consisting of a series in a linear arrangement was chosen using the trial and error method ,as well as, rely on past experiences, so many that the number of attempts but we will review some of them for the purpose of analysis and discussion.

The simulation data which are average reaction Force Fx and Fy for moveable series magnets. Dimensions and mesh processing for geometric model are shown in fig. The behavior of permanent magnets can be studied by knowing the direction of the magnetic flux intensity lines and force of the magnetic field is produced as shown in fig.

Figure 8: flux density for Model of Magnets in Linear Arrangement It is clear from the results that horizontal force Fx is virtually non- existent on the contrary of the vertical force Fy. It can be noticed through the result that the vertical force be symmetrical around mid-point distance and this shows that the vertical force required to access equal to the horizontal force generated by the exist as shown in fig. Figure 9: The forces results of linear arrangments The circular arrangement in fig.

The result torque is represents as in fig. Equivalent Magnetic Circuit The magnetic circuit of this motoris illustrated in fig. The magnetic circuit comprises of the permanent magnetsof the rotor and stator, the air-gap reluctance, the back-iron reluctance and the leakagereluctance as in sub fig.

When the position of the rotor is such that one of the rotormagnets faces the electromagnet and not one of the stator magnets, the magnetic circuitof subfig. The total reluctance ST of fig 12 will then be: RS. Each simulation section of this software is based on a certain Faraday law that makes it an ideal software for both teachers and students. There are a total of 5 different simulation sections provided by this software to simulate different electromagnetic experiments.

This software helps you simulate the behavior of radio and electromagnetic waves between transmitter and receiver in different scenarios. In one of its scenarios, you can change the height of the transmitter to analyze EM waves behavior.

In case of automatic oscillate option , you can also vary the frequency of the transmitter oscillation and amplitude of the simulated waves. In this software, you get three more important sections namely Field Display Type , Field Sense , and Field Displayed which let you simulate different field and waves.

Magnet and Compass is the next free electromagnetic simulation software for Windows. It is one of the simplest simulation software in which you can simulate effects of electromagnetic field on its surrounding area. In it, you get a bar magnet , a compass , and field indicator to simulate different scenarios.

First, we establish a local controllability result. The proof relies on an appropriate inverse function argument. Then, we formulate an iterative algorithm for the computation of the null control and we prove a convergence result. Finally, we illustrate the analysis with some numerical experiments.

In this paper, we first propose a new stabilized finite element method for the Stokes eigenvalue problem. A single regulator system can produce more than one separate DC output line by using a number of secondary windings.

The number of primary winding and number of secondary winding can be change. The default value is one. Two type of flux band are supported. Click the checkbox to add the flux band. After clicked the checkbox, the core with the flux band can be preview.

The Flux band thickness and width can be set. The user can change a particular winding to Faraday Shield. Only extra windings can be changed to Faraday Shield.

The winding order can be changed by the list box. W1 means the most inner layer. The number of turns for each winding is shown in the blue button. You can press this button to modify the number of turns. The wire information for each winding is shown in the blue button. It shows the Wire name and the number of parallel wires.