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<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

<Released> Column: [No. 74] Uncertainties in design calculations for electric machines Let’s quote Racine [1667] : Where am I? What have I done? What must I do now? Although these are the words of a forlorn princess wringing her hands in a castle, concerned about uncertainties in her design space1, they could surely have been expressed by any engineer. As an engineer she’d be wringing her hands in a factory, and she wouldn’t feel much like a princess. Let’s go through some of her woes. Lost records are one of the commonest causes of uncertainty, coupled with our inability to remember all the details. But even when we have records, reports, specifications, and documentation, they can contain uncertainties and even amplify them. We need to write, and we need to write clearly. Ideally we need to write in such a way that records are still intelligible even after a long time. We also need to ‘negotiate meaning’, by asking for clarification whenever it is needed. Communication is a dialog, not a one-way street....Read more #JMAG #Column https://lnkd.in/gZumWr8X

[Application Catalog] An open-end winding motor drive system is one method to increase high motor output. An open-end winding motor drive system connects two inverters to extended open ends rather than to the ends of the winding itself to realize a drive system that has two inverters. This type of drive system switches between using single or dual inverters according to the required output. An open-end winding motor drive system realizes high output at minimal cost by eliminating the need for a boost converter. As one type of open-end winding motor drive system, common power supply systems produce flyback voltage—known as zero-sequence current—between the bus and windings connected to two inverters. The control system must take into account the zero-sequence current in dual inverter drive systems because the zero-sequence current increases the torque ripple and losses. JMAG can generate plant models (JMAG-RT models) that can take into account magnetic saturation, spatial harmonics, and zero-sequence currents that occur in open-end winding motors. Control/circuit simulations embedding plant models enable coupled simulations that consider not just the motor characteristics but also the drive control. This case study runs a circuit simulation of an open-end winding motor drive system that switches from using a single inverter to dual inverters during operation in order to mitigate zero-sequence current and control the target torque. #JMAG #Motor #OpenWinding #WFSM #EESM #ControlCircuit #PlantModel

<Released> Webinar: "Brush up on Motor Design!" has been released. [Vol.53] Uncertainties in design calculations for electric machines This video delves into the uncertainties associated with design calculations of electric machines. There is no way to rid ourselves of these uncertainties, even in simulations that use a large amount of data. We will look at and breakdown a variety of these problems. #JMAG #webinar #simulation #Fleming #Faraday