 # Facts about Finite Element Method (FEM)

Finite Element Method (FEM) or Finite Element Analysis (FEA) is a numerical method used for solving complex engineering problems. It is a powerful tool that enables engineers to analyze structures and systems to determine their performance under various conditions.

The Finite Element Method/Analysis solves partial differential equations that arise in engineering and physics. It involves dividing the problem domain into smaller, simpler regions called finite elements. These elements are then connected to form a mesh or a grid. The governing equations are solved for each element. Afterwards, the solutions are combined to obtain the overall solution for the system.

FEM/FEA is used in various fields of engineering, such as:

• Structural Analysis: FEM/FEA is used to analyze the behavior of structures under different loading conditions. It is used to determine the stress and strain distribution in a structure, the deformation of the structure, and the natural frequencies of the structure.
• Fluid Dynamics: FEM/FEA is used to solve fluid flow problems, such as calculating the pressure and velocity distribution in pipes, channels, and other flow systems.
• Heat Transfer: FEM/FEA is used to analyze the heat transfer in various systems, such as heat exchangers, boilers, and furnaces.
• Electromagnetics: FEM/FEA is used to analyze electromagnetic fields, such as those found in motors, transformers, and other electrical equipment.

FEM/FEA has become an essential tool in modern engineering design and analysis because it enables engineers to simulate complex physical systems and predict their behavior under various conditions.  Need help with FEM / FEA Projects? Seek support from our exceptional engineers and contact us now.

## Obtaining the Inductance with Dependence on Frequency and Amplitude of the Applied Alternating Current via Measurements and Validation of Considered Non-linearity and Saturation Effects with Lumped Parameter Model

This publication provides the process for obtaining of a self-inductance of electrical machines with a dependence on frequency and amplitude of an applied alternating current and consideration of a non-linearity and saturation effects in the equivalent circuit lumped parameter model that would have the same frequency and time domain characteristic as some desired investigated electrical machine. The values of inductances were calculated from measured impedances for wide ranges of frequencies and currents according to the theory of a complex inductance and iron losses. The measured data were analyzed and summarized in a table and then used for modeling of a automotive alternator. The model was supplied with curve fitted data. The simulation of a common automotive test case was obtained and compared with measurements. Good match between the theory and measurements and reasonability of the suggested approach were confirmed.

This content is for Basic and Premium members only.

## Standstill Frequency Response Test for Obtaining Parameters of Six Phase Double Delta Salient-Pole Synchronous Machine on Example of Claw-Pole Alternator

The current publication introduces an approach for obtaining parameters of a six phase double delta salient-pole synchronous machine, based on the standstill frequency response test. The described approach was verified by measurements on a automotive claw-pole alternator, done in a laboratory on a test bench.

This content is for Basic and Premium members only.

## Flux Barrier Design Method for Torque Ripple Reduction in Synchronous Reluctance Machines

Abstract—The current publication introduces the flux barrier design method and the concrete design of the synchronous reluctance machine with the reduced torque pulsations. The reviewed method provides the accelerated approach for designing of rotor flux barriers, based on Fast Fourier transforms and simple mathematical expressions. The proposed method has been utilized in the rotor design of synchronous reluctance machine and has shown desired results in reduced torque ripple. The innovative nonsymmetrical geometries for rotor flux barriers created on the basis of proposed flux barrier design method have been implemented and proved as beneficial. Keywords—Flux barriers; torque ripple reduction; FEM; synchronous reluctance machines.

This content is for Basic and Premium members only.