SPM Motor

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  1. 226 – Vibration Characteristics Analysis of SPM Motors

    In this example, the acceleration is evaluated by obtaining the electromagnetic force generated in the stator core of the SPM motor at multiple rotation speeds and coupling with t…

  2. 241 – Single-Phase Synchronous Motor N-T-I Characteristics Analysis

    In this example, a use case in which the N-T-I characteristics for a single-phase synchronous motor are obtained is presented.

  3. 20 – Sound Pressure Analysis of an SPM Motor

    OverviewAs electric motors are becoming more common, motors which create less noise are in high demand. Sound can be divided into categories of electromagnetic noise, mechanical n…

  4. 230 – 6-Phase SPM Motor Inverter Fault Simulation

    In this example, a JMAG-RT model of a 6-phase SPM is loaded into a control/circuit simulator, and circuit simulation for an inverter failure is carried out.

  5. 163 – Torque-Current Curve Analysis of an SPM Motor

    OverviewOne of the fundamental properties of a permanent magnet synchronous motor is the relationship between its current and torque (torque-current curve). The torque generated a…

  6. 159 – Sensitivity Analysis of Dimensional Tolerance in an SPM Motor

    OverviewThe corners of magnets used in surface permanent magnet (SPM) motors can be filleted, chamfered, etc. However, it is difficult to maintain exactly the same production in t…

  7. 114 – Vibration Analysis of an Outer Rotor Motor

    OverviewAn outer rotor motor has a magnetic rotor that rotates around a stator. The rotor radius of an outer rotor motor is large, so it can produce a larger amount of drive torqu…

  8. 124 – Cogging Torque Analysis of an SPM Motor Accounting for Uneven Stator Diameter

    OverviewWhen a motor is assembled, the inner diameter of the stator can become uneven because of fabrication errors, shrink fitting, press fitting, etc. Cogging torque increases d…

  9. 93 – Cogging Torque Analysis of a Motor with 8 Poles and 9 Slots Accounting for Eccentricity

    OverviewEccentricity can occur on the center axis or the rotation axis of a motor. It is advantageous to evaluate the effects of eccentricity because it can cause vibrations and n…

  10. 46 – Sensitivity Analysis of the Magnetization Pattern of an SMP Motor

    This Application Note presents the use of a magnetic field analysis to obtain the surface flux density for radial pattern, parallel anisotropic pattern, and polar anisotropy patte…

  11. 120 – Thermal Demagnetization Analysis of an SPM Motor

    OverviewExactly how to resolve the problem of rising temperatures is a vital issue when trying to achieve an improvement in a motor's efficiency and output. Among the materials us…

  12. 103 – Efficiency Analysis of a Permanent Magnet Synchronous Motor

    OverviewA permanent magnet synchronous motor rotates by converting electric energy to mechanical energy.The important thing when converting energy is efficiency indicated by the p…

  13. 115 – Eccentricity Analysis of an SPM Motor

    OverviewMotors have many parts, which must be assembled correctly for a usable product. Even if each part is made within acceptable limits for manufacturing errors, when various p…

  14. 108 – Centrifugal Force Rupture Analysis of a Ring Magnet

    OverviewAs the applications for permanent magnet synchronous motors expand in the manufacturing sector, the development of high-speed-capable motors is continuing apace. One probl…

  15. 80 – Cogging Torque Analysis of an SPM Motor with Skewed Magnetization

    OverviewReductions in vibration and noise are being sought after because they are a cause of torque variations in motors, and demands for reduction are particularly strong with mo…

  16. 31 – Iron Loss Analysis of an SPM Motor Including the Effect of Press-fitting Stress

    OverviewThe laminated structure of a core in a SPM motor can be sustained using press-fitting or shrink fitting. The press-fitting stress needs to be accounted for in the iron los…

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