Overview
Closeup |
In any device having a permanent magnet, the magnetization state of the
magnet has large effect on the device characteristics. In the analysis
of a permanent magnet or a device having a permanent magnet, the process
of orientation and magnetization needs to be taken into account for accurately
simulating the magnetization state of the magnet. In JMAG, the magnetic
field orientation and magnetization field can be calculated and the result
is used for the analysis of the magnet to evaluate the device characteristics.
This note presents the use of magnetic field analysis to evaluate the surface
magnetic flux density distribution of a magnet, taking into account the
process of orientation and magnetization. |
Magnetic Field Orientation Distribution/Magnetization Field Distribution
| Fig. 1 shows the magnetic field orientation distribution. Fig. 2 shows
the magnetization field distribution. The magnetic field orientation distribution
shows the radial orientation. When the magnetization field shown in Fig.
2 is applied to this orientation, the magnetization state inside the magnet
can be determined. |
Closeup |
Closeup |
Magnetization Distribution / Surface Magnetic Flux Density Distribution
| Fig. 3 shows the magnetization distribution of Magnet A and Magnet B. Magnet
A is magnetized taking into account the magnetic field orientation shown
in Fig. 1. Magnet B is magnetized taking into account the ideal radial
orientation. Fig. 4 shows the magnetic flux density distribution at 0.5
mm above the surface of the magnet placed in the air. When the edges of
magnets are compared, the magnetization of Magnet A is stronger than that
of Magnet B. This is because the orientation at the edge of Magnet A is
more similar to the magnetization field distribution shown in Fig. 2 compared
with Magnet B. As shown in Fig. 4, when the center of poles is compared,
the surface magnetic flux density of Magnet A is higher than that of Magnet
B. This is because the orientation at the center of the pole of Magnet
A is different from the magnetization field distribution shown in Fig.
2 compared with Magnet B. Also, the surface magnetic flux density distribution
is different at the edge between Magnet A and Magnet B, as shown in Fig.
3. |
Closeup |
Closeup |
  |
