Transformer / Reactor

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  1. 32 – Analysis of a Transformer

    In this example, the use of a magnetic field analysis to evaluate changes in the secondary voltage caused by load variations in a low frequency transformer.

  2. 151 – Insulation Evaluation Analysis of a Power Transformer

    In this example, how to obtain the electric field intensity distribution when a lightning strike or short circuit occurs and the assumed maximum voltage is applied to the winding.

  3. 254 – Vibration Analysis of a Large Oil-Filled Transformer

    In this example, evaluating vibration caused by electromagnetic excitation in a large transformer. Since large transformers are oil-cooled, in this example the oil, which is the f…

  4. 235 – Reactor Core Stray Loss Analysis

    In this example, reactor core stray loss is described.

  5. 203 – No-Load Test Analysis of Power Transformer

    This example focuses on modeling in the analysis of no-load tests in JMAG and obtains the iron loss distribution, current, excitation conductance, and excitation susceptance that …

  6. 221 – Confirmation of the Influence in the Reduction of High-Frequency Resistance of a Magnetically Plated Wire Choke Coil

    In this example, high frequency resistance values are obtained from choke coil copper loss analysis results using JMAG’s layer coating mesh function, and the effectiveness of redu…

  7. 202 – Core Stray Loss Analysis of Power Transformer

    This document introduces runs analysis by modeling the short-circuit test that is conducted when evaluating stray loss and obtains stray loss distribution in the core close to the…

  8. 238 – Hysteresis Loss Analysis in a Reactor with DC Bias

    In this example, we will observe the difference between the hysteresis losses calculation method loop count and the play model for the model that is subjected to a DC bias filed o…

  9. 232 – Reactor Joule Loss Analysis

    In this example, investigating Joule loss with respect to the positions of air gaps in a reactor is presented.

  10. 206 – Temperature Analysis of an Oil-Immersed Transformer Using a Coupled Magnetic Field and Thermal Fluid Analysis

    This document introduces, examples and steps will be shown to obtain heat distribution in a magnetic field analysis for a forced circulation type oil-immersed transformer, map the…

  11. 204 – Copper Loss Reduction Effect Analysis of Switching Transformers using Litz Wire

    This document introduces confirms the effects on copper loss due to the presence or absence of a twisted structure in the winding regarding the copper loss that occurs in the smal…

  12. 185 – Analysis of Stray Loss in a Power Transformer

    This note obtains loss distribution for each component in drive condition and checks local overheating.

  13. 184 – Reactor Sound Pressure Analysis taking Magnetostriction into Account

    These notes will conduct an analysis of changed vibratory force and show a case study of confirming the impact magnetostriction has on vibration noise.

  14. 107 – Current voltage characteristics analysis of flyback converters

    This case study obtains the current waveform of the primary / secondary winding and the core magnetic flux density distribution, current density distribution inside the winding, j…

  15. 152 – Electromagnetic Force Analysis of Short-circuited Power Transformer Coils

    This analysis uses different coil positions to evaluate the Lorentz force density and electromagnetic force produced in the coils during a short circuit in order to confirm the ef…

  16. 158 – Superimposed Direct Current Characteristic Analysis of a Reactor That Accounts for Minor Hysteresis Loops

    This Application Note presents the use of the frozen permeability condition to obtain the superimposed direct current characteristic that includes minor hysteresis loops of a high…

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