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<Released> Column: [No. 75] What finite-element analysis can and cannot do Is FE Man telling the truth? Let's pretend somebody has sued him for making false claims. We're in the High Court, and the lawyers pose two carefully-worded questions: 1) Can the finite-element method analyse every structure that can be manufactured? 2) Can the finite-element method analyse any structure that cannot be manufactured? And let's hear some answers: 1) Yes, absolutely! 2) Who cares? These answers are glib, unthinking, superficial, off-hand, dismissive, dangerous, and wrong. If you gave these answers in evidence in the High Court under cross-examination, the first answer could be said to be downright reckless, while the second one would be disrespectful to the court (and it would reflect badly on the you, the witness). The lawyer might raise an eyebrow but would probably make no comment in reply. Instead, he or she would set about the painstaking process of proving your answers to be incorrect. ...Read more #JMAG #Column #FiniteElement https://lnkd.in/gCBiVemJ

[Application Catalog] The thermal analysis of the motor needs to consider the heat flow of not only components of the motor but also external parts such as the case. Using the thermal equivalent circuit reduces the computational cost for the region where is not the temperature distribution calculation target.This application note explains the method using the FEA and the equivalent circuit.  It evaluates the temperature of the coil by changing the current amplitude if the temperature goes higher then the heat resistant temperature. #JMAG #Motor #EddyCurrentLoss #CopperLoss #IronLoss #Temperature #HeatSource [JAC018] Thermal Analysis of a Motor https://lnkd.in/gFFKS9Fw

[Application Catalog] With the skyrocketing prices of rare earth magnets, expectations have been rising for SR (switched reluctance) motors because they have a motor format that does not use permanent magnets. SR motors have a simple structure that can achieve solid performance at a low price. However, torque generation depends only upon the saliency between the stator and rotor, so torque variations are extremely large and cause vibration and noise, meaning that the use applications are limited. On the other hand, because of the skyrocketing prices of rare earth metals, the improvement in current control technology, the possibility of optimized designs thanks to magnetic field analysis, and the rising ability to reduce challenges, SR motors are being re-examined. SR motors create their excitation state by alternating between opening and closing switches in accordance with the position of the rotor’s rotation, however the timing of the alternating causes major changes in the torque properties. Also, it is important not only to increase the torque average and torque constant, but also to consider the optimum switch timing to control vibration and noise. This example presents how to carry out an analysis with different switch timings to evaluate torque and current in SR motors. #JMAG #SR #Motor #DynamicCharacteristics #Torque #Current #CopperLoss #SwitchingCharacteristics [JAC180] Analysis of SR Motor Dynamic Characteristics https://lnkd.in/gcrddkAY

<Released> Webinar: "Brush up on Motor Design!" has been released. [Vol.54] Maxwell's Apprentice & the Flux Gusher This video provides as a short introduction on flux linkage. Professor Miller has created an illustration of an oil field on the first slide to make flux linkage easy to imagine for everyone new to the subject. A flux flood is like oil gushing from a well, but flux linkage is like oil captured at the well-head. Let’s learn a little bit about the flux linkage that control engineers who want to control torque and speed must consider. #JMAG #webinar #fluxLinkage #FiniteElementMethod #InducedVoltage https://lnkd.in/g6NYa9T

[Application Catalog] More and more permanent magnet motors are starting to use rare earth magnets, which have a high energy product, in order to achieve higher output density. Neodymium rare earth magnets contain a great deal of iron so they have a high electric conductivity, but when a varying magnetic field is applied they produce Joule loss from eddy currents. Due to the spread of IPM structure adoption and field weakening controls in recent years to speed up rotation, the frequencies and fluctuation ranges of varying fields applied to magnets have increased, and there has been a corresponding increase in Joule loss. By dividing the magnet, like one would a laminated core, to control eddy currents, one can obtain a method of lowering the apparent electric conductivity and lowering the eddy currents. Armature reactions in the stator occur before the eddy currents produced in the magnet, so the eddy currents are determined by the slot geometry of the stator core, the geometry of the rotor, the nonlinear magnetic properties of the core material, and the current waveform that flows through the coil. In order to examine these kinds of magnet eddy currents ahead of time, one has to account for things like these geometries and material properties precisely, so a magnetic field simulation using the finite element method (FEM), which can account for them, would be the most effective. In this example, the use of a magnetic field analysis in a state of operation to obtain variations in magnet eddy current losses according to the number of divisions in the magnet. #JMAG #IPM #Motor #Magnet #EddyCurrent [JAC022] Analysis of the Eddy Current in the Magnet of an IPM Motor https://lnkd.in/gV9aiZ5C

<Application Catalog> [JAC296] Torque Characteristic Analysis of an IPM Motor Accounting for Temperature Distribution and Changes in Temperature In order to realize the high efficiency and high output of motors, it is necessary to understand the temperature increases that occur in each part of a motor. This is because coil resistance and magnet characteristics change with increases in temperature, and this may result in motor characteristics being largely affected. Although it is difficult to understand the temperatures of each part in a real machine, the temperature distribution of each of these parts can be obtained with ease through simulations, and changes to characteristics due to increases in temperature can also be accounted for. In this example, magnetic field and thermal coupled analysis is run, and changes in torque due to part temperatures and magnet demagnetization are checked. #JMAG #motor #IPM #Operatingpoint #Torque #Coupling #Directcoupling https://lnkd.in/gQ-iaRrj

We will be run a booth at the #ECCE 2024 (#IEEE ENERGY CONVERSION CONGRESS & EXPO). ECCE is the pivotal international conference and exposition event on electrical and electromechanical energy conversion. We look forward to seeing you there. - Tuesday, October 22 10:30AM – 12:10PM  #573 | Finite Element Analysis Optimization Coupling the Control Simulation to Minimize PWM Loss [2.8 Posterboard 9]  Kazuki Semba JSOL Corporation, Japan - Sunday, October 20  Tutorial 15 | Design & Optimization of High Torque Density Permanent Magnet Synchronous Machines for Traction Applications  1:00pm – 4:30pm Room 122A Ahmed Shoeb, Mohanraj Muthusamy Powersys, Inc.   - Thursday, October 24  Oral Session 100 | Topology Based Optimization of Wound Field Synchronous Machine with Hybrid Excitation for Traction  Applications [#1760] 11:40am – 12:00pm Room 213 Mohanraj Muthusamy Powersys, Inc.   https://lnkd.in/gZ3AjYZy #JMAG #Powersys

[Leaflet] Motor design requirements are becoming more advanced with the need for maximizing torque at high and low speeds while meeting the constraints of torque ripple, line voltage limits, and stress on the core. Combining parameter optimization and topology optimization is effective for meeting such high-level requirements.   JMAG-Designer supports both parameter optimization and topology optimization. The use of topology optimization is expected to enable the creation of design plans with new magnetic circuits. #JMAG #Motor #IPM #Motordesign #Topology #Optimization JMAG WEB MEMBER (free membership) Registering as a "JMAG WEB MEMBER" allows you to use JMAG-Express Online (Motor Design Tool), which enables the ability to design motors online and view selected materials. https://lnkd.in/gTE2q3h5

JSOL Corporation would like the Users Conference each year to be an opportunity for users to communicate and share ideas. A wealth of content will be provided to satisfy a range of skill levels including JMAG wizards and beginners, as well as those who have not yet participated in the Users Conference. #JMAG #fea Register now:https://lnkd.in/gfjunkCC

⏲️Less than 2 weeks left! Have you secured your spot yet? Time is running out to join us at the EU Advanced e-Motor Design Conference in Stuttgart! On October 22 & 23, dive deep into how #JMAG can automate e-motor design workflows, explore real-world examples of massive simulations, and get hands-on practice using JMAG to enhance your skills directly. Before the plenary session, you will have the opportunity to increase your e-motor design skills whether you are a beginner or an expert user of JMAG by joining our basic or advanced JMAG trainings.   Don’t miss out – register now: https://lnkd.in/drhsGTxY #massivesimulation #emotor #fea #electricmotors #automation