Laminated Magnets

Laminated Magnets, Laminated Arc and Block Permanent Magnets, Rare Earth NdFeB and SmCo lamination magnet, Segmentation Technology Layered Magnet, Laminated Magnetic Assemblies

Laminated magnets can reduce eddy current Loss in high efficiency motors.
High efficiency demands the best materials, and the laminated rare earth magnets are proven to reduce eddy current losses in high efficiency motors. Fewer eddy current losses means lower heat and greater efficiency.

Laminated Magnets

Laminated Magnets

Laminated magnet is to cut the whole magnet into many small magnets, and then use specific glue to bond together. These small magnets are insulated from each other and can down lectromagnetic eddy current.

When the permanent magnet motor is running, the motor will generate harmonic and the magnet will generate skin effect, these all will bring a lot of eddy current loss. And then, the temperature of permanent magnet rises, which results in irreversible demagnetization and affects the safety and stability of motor operation. So the design of laminated magnet can just cut down this risk.

The eddy current simulation experiment of different piecemeal permanent magnets

The eddy current simulation experiment of different piecemeal permanent magnets

Technical requirement:
1.The thickness of insulating layers is within 0.04mm.
2. In normal temperature, the bond strength of insulating layers can reach more than 50Mpa.
3. The maximum working temperature can reach 200 ℃.
4. The whole geometric tolerance is within 0.05mm.
5. These small magnets are insulated from each other.

Application scope:
Now aerospace, automotive, motorsport, and industrial markets are turning to laminated rare earth magnets, and are working to balance the tradeoff between power and heat.

Purpose:
To reduce magnetic eddy current loss

Calculation of eddy current losses with and without lamination are shown below:

Calculation of eddy current losses with and without lamination

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