41BDL7324L
33
Appendix F. Magnet tension
0.4~0.5Kg
(Module Weight)
60
o
C 80
o
C 120
o
C
(Safety redundancy,
Follow UL 2442)
2.25Kg
6.4Kg
7.0Kg
2.0Kg
Dangerous
Area
Temperature
Magnets tension
1. Each module uses 9 N52 NdFEB magnets. After measurement, the tensile force of N52 NdFEB magnets at various
temperatures is as follows:
Temperature 20
o
C 60
o
C 80
o
C 120
o
C
The tension value of each magnet (Kg) 0.78 0.78 0.78 0.25
Tension value per module (Kg) 7 7 7 2.25
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.
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