No-load characteristic analysis
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159 - Influence Analysis of Dimensional Tolerance using Morphing |
Module:DP |
2011-02-28 |
The angle of the magnets in SPM motors use a fillet or chamfer. However,
the fillet and chamfer of each product that is manufactured varies because
to completely fabricate the same fillet or chamfer is difficult in the
manufacturing process. Therefore, the dimensional tolerance is set so the
motor performance is not affected by these variations.
This example presents the use of a magnetic field analysis to compare whether
the cogging torque of the SPM motor is influenced by changing geometry
in the tolerance range assuming the dimensional tolerance of the chamfer
is ±0.4 mm.
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129 - Characteristic Analysis of a PM Stepping Motor Accounting for Magnetization
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Module:ST,TR |
2011-01-17 |
Stepper motors are commonly used for positioning in printers and digital
cameras.The magnetization of the magnets used for the PM stepping motor
largely affect the motor's characteristics.Therefore, it is advantageous
to accurately measure the characteristics of the PM stepping motor by clearly
defining the magnetization with an analysis.This example presents the use
of magnet field analyses to obtain the induced voltage of a PM stepping
motor that combines magnetization distribution, surface flux density, and
magnetization of magnets magnetized with a magnetization device.
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80 - Magnetization Analysis of an SPM Motor with a Skewed Magnet |
Module:TR |
2011-01-31 |
Motors are not only required to be more compact and have higher efficiency, but also to have less noise and vibration. One of the reasons of noise and vibration is cogging torque, which is caused by the interaction between the iron core and the permanent magnet. Cogging torque can be reduced by applying skew.
This note presents the use of magnetic field analysis to evaluate the magnetic flux density distribution and cogging torque of an SPM motor with a skewed magnet.
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55 - Magnetization Analysis of an IPM Motor
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Module:DP,ST |
2011-01-17 |
A magnetized magnet needs a careful handling at the time of assembling
an IPM motor, so it is useful to magnetize the magnet after placing it
in the motor. Generally, it is desirable the entire magnet is magnetized
completely. So, magnetization conditions, such as the amount of current,
need to be considered before magnetization. In JMAG, Magnetizing Tool is
used to obtain magnetization field which can be later used to produce magnetization
distribution. This note presents the use of magnetic field analysis to
obtain magnetization fields at different currents, and also to obtain the
induced voltage and cogging torque of an IPM motor when obtained magnetization
fields are used for magnetization of the magnet.
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46 - Surface Magnetic Flux Density Analysis Accounting for the Magnetization
Direction
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Module:DP,ST |
2011-07-12 |
Cogging torque is produced as a motor rotates. Problems such as a reduction
in efficiency, vibrations, and noise can be improved by reducing the amount
of cogging torque that occurs. One factor that affects the cogging torque
is the direction the magnets are magnetized. This example presents the
use of a magnetic field analysis to obtain the surface magnetic flux density
for the radial pattern, parallel anisotropy pattern, and the polar anisotropy
pattern of magnets. Furthermore, the flux linkage, induced voltage, and
cogging torque are obtained for an SPM motor that uses magnets with these
magnetization patterns.
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