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德语The MSAM is a high-speed machine that requires very high magnetic force to operate. A permanent magnet is used as the rotor and the stator core is made of amorphous alloy material, which has good magnetic conductivity. The amorphous alloy material can reduce the heat generated by the rotation of the magnet, and it can also increase the magnetic flux density to improve the strength. Moreover, it is more conducive to cooling the rotor and reducing air friction loss. Therefore, the MSAM is very suitable for air suspension systems.
Samarium-cobalt (SmCo) is a rare earth magnet with maximum energy products of 14 megagauss-oersteds (MG*Oe) to 33 MG*Oe and Curie temperatures of 800 degC (1,070 K). The SmCo magnet can operate in high temperature environments without demagnetization. However, the SmCo magnet is sensitive to applied fields that cause short-term demagnetization and thermal agitation of domains or metallurgical change. Hence, it is essential to understand the influence of temperature on the SmCo magnet’s demagnetization characteristics.
To accurately analyze the temperature field of the SmCo magnet, the finite element coupling simulation method is used with ANSYS Fluent. This method ensures that the loss data solved in the electromagnetic field is transferred to the temperature field of the system. This helps in determining the temperature distribution of each part of the motor. The results of this analysis are compared with the experimental data of the temperature rise of the motor during operation.
This paper studies the influence of the magnetic flux distribution on the SmCo magnet’s demagnetization resistance at high working temperature. The SmCo magnets used in the study are amorphous alloy Sm2Co17 and a special grade with low temperature coefficient. The results show that the SmCo magnets have higher demagnetization resistance than NdFeB, but lower than Alnico. In addition, the SmCo magnets are resistant to temperature changes in a wide range.
Powder Metallurgy is the most common manufacturing method for permanent magnets. The raw materials for the required grade/specification are melted in an induction furnace, and then pulverized into a fine powder before being compressed and sintered. Ferrite, Neodymium-iron-boron (NdFeB) and Samarium Cobalt (SmCo) are all made using this process.
The key to the success of powder metallurgy is choosing the right raw materials for each application. This is especially important for NdFeB and SmCo magnets because they require the highest purity of any ferromagnetic material. The quality of the raw material can have a significant impact on the magnet’s performance, durability and cost.
The price of the raw materials has become a major concern for both customers and suppliers of rare earth magnets. For some customers, the current price has impacted their bottom line, while for suppliers, it has caused sleepless nights. As the market waits for the raw materials to stabilize, manufacturers of NdFeB and SmCo Magnet are focusing on improving their processes to increase efficiency and reduce costs. This has led to the development of new technology that could lead to more stable prices in the future.
Samarium Cobalt Magnet Manufacturers
