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Block Laminated Motor Magnets for Eddy Current Loss

/Block Laminated Motor Magnets for Eddy Current Loss
  • Block Laminated Motor Magnets for Eddy Current Loss

Block Laminated Motor Magnets for Eddy Current Loss, Neodymium Laminated Glued Layered Block Magnets, Permanent NdFeB Lamination Magnet, insulated magnet or glued magnet for Reduce Eddy Current Loss IN High Efficiency Motor, sintered Ndfeb / SmCo permanent magnets, Segmentation Technology Magnet

Block Laminated Motor Magnets for Eddy Current Loss Part No. HSLAMIM-14
Customzied Specific Requirements
Know as Lamination Magnetic Core
OEM or ODM service: Accept
Dimension: Customized size
Custom Grade: N33-N54(M.H.SH.UH.EH.AH )
Magnetization direction: Thickness, Length, Axially, Diametre, Radially, Multipolar
Surface Treatment: Silver, Gold, Zinc, Ni-cu-Ni. Epoxy etc.
Tolerance: +/-0.02 – 0.05mm
Application: NdfeB Neodymium rare earth permanent magnets are widely applied in Auto, energy-efficient Motors and Generators, Machinery, Audio/Video and Communication Equipment, Medical Device(MRI), Office Automation, Magnetic Separator, etc.

Laminated magnet is produced with several pieces of magnets glued so as to reach insulation effect between those pieces. Therefore sometimes laminated magnet is also called insulated magnet or glued magnet. Laminated SmCo or laminated Neodymium rare earth magnets are proven to reduce the eddy current loss for the high efficiency motors.

Accompanying the higher performance and lower cost of permanent magnets, permanent magnets are also coming into use in large machines such as motors for electric cars, motors for railroads, and wind-powered electric generators. With the expansion of usage applications, permanent magnets are also becoming larger and coming to be used at higher rotation rates, so the loss due to eddy currents from permanent magnets is becoming a problem. Therefore, the permanent magnet loss in magnetic circuits is simulated with magnetic field analysis and magnet shapes are proposed to reduce that loss. Neodymium Laminated Glued Magnets

The fewer the eddy current loss becomes, the lower the heat generates to enhance higher efficiency. Nowadays the demand of laminated rare earth magnets has been going up, because aerospace, industrial markets and promising EV especially are dedicating to pursuing the balance between motor power and heat.  Custom Drawing Design Block Insulated Magnet Thanks to knowledge in electric motor and extensive experience in laminated magnets, Horizon can work with customers to improve motor performance through ensuring laminated magnets with following characteristics:

Stable working at temperature up to 200˚C
Consistency of insulation guaranteed
Insulation layer ranging 25 -100 μm
Magnet layer with thickness from 0.5mm and up in a wide of shapes like block, loaf, segment and wedge
Magnet material in SmCo or Neodymium

Eddy Current for Large Motor
From the results of the first plot, we can visualize the magnetic flux density of the motor when at a stationary state — in other words, the initial conditions used for the time-dependent simulation. The coil current at this initial state is zero. The plot on the right shows the magnetic flux density after the motor revolves one sector angle. To obtain a better view, we can exclude the air and coil domains.
As a countermeasure to eddy current, it is effective to split magnets. The relationship between the number of pieces magnets are split into and the eddy current loss is summarized. This made it clear that eddy current can be reduced by splitting magnets and insulating between the pieces. it shows condition of eddy current in the magnets for inverter drive when the magnets are not split and when they are split into 6 pieces. This shows that the eddy current paths become finer with the split magnets. Smallest Micro Arc Segment Laminated Magnets

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