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Appendix F. Magnet tension
Magnets tension
7.0Kg
6.4Kg
2.25Kg
2.0Kg
(Safety redundancy,
Follow UL 2442)
0.4~0.5Kg
(Module Weight)
1. Each module uses 9 N52 NdFEB magnets. After measurement, the tensile force of N52 NdFEB magnets at various temperatures
is as follows:
Temperature
The tension value of each magnet (Kg)
Tension value per module (Kg)
2. The maximum weight of each module is 0.5kg. According to UL2442 standard, 4 times the safety factor is 2.0kg. It can be seen
from the above table that when the temperature is >120 degrees Celsius, the residual pull value of the magnet is close to 4
times the safety factor, that is, more than 120 degrees is the dangerous area.
60
C
80
o
20
o
C
60
o
C
0.78
0.78
7
7
41
Dangerous
C
120
C
o
o
80
o
C
0.78
7
22BDL7331L
Area
Temperature
120
o
C
0.25
2.25
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