Assorted Colors Waterproof Round Magnetic Permanent Office Memo Magnets, Plastic Disc Ceramic Permanent Magnet, Glassboard Magnets, Colorful Plastic Case Round Magnetic Buttons, PP Coating Strong Ferrite Round Magnet, Whiteboards, Planning and Refrigerator Magnets China Supplier Assorted Colors Waterproof Round Magnetic Permanent Office Memo Magnets Specification: Material: ceramic / ferrite and plastic shell casing Size: approx. […]
Segmented Bread Loaf SmCo Superior Permanent Magnet, Rare Earth SmCo breadloaf shape magnets for wind turbine, higher operating temperature motor magnet, Strong Sintered Samarium Cobalt Segmented Laminated Magnets
Segmented Bread Loaf SmCo Superior Permanent Magnet Specifications
Dimensions: customized size
Tolerances: ±0.004″ x ±0.002″ (+/-0.1mm x ±0.05mm)
Magnetization Direction: Parallel
Max Operating Temp: 350ºC
Other: All magnets passed QC(Br. Flux.Dimensions)Test. We have special price for factory buyers
A four pole motor is meant to operate inside a vehicle’s engine compartment, which can have an ambient
temperature anywhere between -40°C and 125°C. This can lead to temperatures over 180°C inside the machine. Having to design around this temperature range leads to large performance differences in the magnet
properties. In other words, a machine operating at room temperature will have more torque than a machine
operating at 180°C for the same amount of input current. Permanent Magnet Generators Breadloaf Shape SmCo Magnet
The smaller demagnetization value of Samarium Cobalt magnets compared to Neodymium magnets results
in much flatter operating characteristics across a temperature range.
The elevated temperatures of a vehicle drivetrain require magnets with superior resistance to demagnetization. In most cases, this necessitates the use of Samarium Cobalt based magnets. The thermal demagnetization for SmCo magnets is much lower than for Neodymium based magnets. (Reversible Temperature
Coefficients of .035%/C° for Samarium Cobalt versus 0.10%/C° for Neodymium.) shows the
remnant flux density (Br) versus temperature for different magnet materials and grades. Even though the
Neodymium magnet has a higher residual field strength at room temperature, it quickly crosses the SmCo line.
The bread loaf-shape magnet can effectively reduce torque ripple. However, at the same time the average torque is also reduced due to lower fundamental harmonics, especially compared to tile-shape magnet. However, by injecting 3rd harmonics, or even higher harmonics, not only the torque ripple can be reduced, but also the average torque can be aligned with the tile-shape magnet, or even be higher.
HS Magnetics offers “W” grade NdFeB magnets with energy products up to 48 MGOe and maximum operating temperatures of 150°C. Rectangular parts may be manufactured up to 150 mm long x 101 mm wide x 38 mm thick, with tolerances as tight as ±0.13 mm. Laminated and non-laminated flux concentrators are available as a complete assembly. Other “W” grades offering higher operating temperatures, are available in slightly smaller overall sizes. In addition, various geometries are available including arc and breadloaf shapes.