Multipolar Isotropic Ferrite Ring Permanent Magnet, Ceramic Multi-pole Magnets, motor rotor permanent ring magnets, Radially Orientation Multi-polar Magnetic Ring, Anisotropic hard ferrite magnetic rings for electronic motors Multipolar Isotropic Ferrite Ring Permanent Magnet Features: Specification size: custom design drawing Magnetizing mode: Radial 6 poles Type: Permanent Magnet Tolerance: +0.1mm Composition: Sintered Ferrite Magnet (hard ceramic) […]
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.
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.
What are the main characteristics of samarium cobalt magnets? Samarium Cobalt Magnets exhibit excellent corrosion resistance, and do not need to be protected for corrosion. SmCo magnets also offer high-resistance to demagnetization. High Powerful Samarium Cobalt (Rare Earth) Bomatec Magnets
What are the best temperatures to use for samarium cobalt magnets? SmCo magnets are very temperature stable – their properties stay within a very narrow range up to about 300° C (570° F).
What are some common applications used for samarium cobalt magnets? SmCo’s magnetic characteristics are ideal in applications for the marine, automotive, aerospace, medical, military and industrial automation industries where high- temperature performance is critical. They are commonly used in motors, machinery, pumps, medical devices, magnetic couplings, magnetic separators and more.
What grades & shapes are available for SmCo magnets? SmCo magnets are available in a number of different grades that span a wide range of properties and application requirements. We currently stock SmCo disc magnets in grades 18 and 26, available in a wide range of sizes. If you are looking for a different shape, size or grade that what is shown on the site, just let us know by sending us a special request or contact us today.