Sintered Samarium Cobalt Lamination Segment Magnets

Segment Samarium Cobalt Laminated Magnets, High Powerful Samarium Cobalt (Rare Earth) Magnets, Motor Lamination Arc Magnet, Snake Line magnetomotive force Laminated SmCo Magnet, Eddy Current Loss Permanent Laminated Type Magnets Segment Samarium Cobalt Laminated Magnets N45H, N40SH, N38SH, N50, N48H – 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. A class of rare earth material, samarium cobalt magnets are available in both sintered and bonded forms, as well as custom configurations.

Major Characteristics High Br, high Hc, relatively high BHmax Higher in cost than neodymium iron boron Highly resistant to oxidation Most grades function well at temps up to 300°C (572°F) Energy product ranges from 18 MGOe to about 33 MGOe Relative cost index (by weight): 60 In most cases, the eddy current loss of permanent magnets is much lower than iron loss and copper loss of the motor, but it will generate a large temperature rise in the high-speed motor and the high power density motor. Ideally, stator magnetic field and rotor magnetic field of PMSM are rotating synchronously, or relatively static, thus permanent magnets without eddy current loss in such case. In fact, there are a series of space and time harmonics are existing in the air gap magnetic field, and these harmonic components are stemming from cogging effect, non-sinusoidal distribution of magnetomotive force and phase current. The harmonic magnetic field will link with rotor magnetic field and hence generated eddy current and caused relevant eddy current loss. It should be also noted that the harmonic magnetic field and eddy current loss will rise with increasing motor speed.

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