Now there are 40 to 70 places in each car to use permanent magnet materials, the amount is about 5 kg, mainly such as actuators, sensors, ABS, motors and audio systems. As the level of automation and comfort in cars increases, the number of motors has also increased from 30 to more than 100. Typical applications such as starter motor, wiper motor, engine cooling fan motor, automatic door lock motor, automatic window lift motor, roof window opener motor, seat adjustment motor, air conditioner motor, headlight correction motor, mirror correction motor, Electric water pump, electric oil pump, electric curtain motor, headrest position adjustment motor, seat reclining motor, seat belt tensioning motor, etc. Due to the harsh working environment of automobiles, the permanent magnet materials used in motors are mainly ferrite magnets. If the starter motor is installed on the engine, in the face of high temperature, dust, salt fog and humidity, only ferrite magnets are suitable; in addition, the magnets are required to have high performance, the coercive force should be at least higher than 358kA/m, and the remanence should be 430mT. Although the wiper motor is not as high as the starting motor for the magnetic performance, it requires that the change of the magnetic flux at high and low temperature is less than 5%, and the volume is required to be reduced, and the remanence value is required to reach 450mT. The oil pump motor does not have high requirements on temperature, but it has strict requirements on the physical characteristics such as the appearance and cleanliness of the magnetic tile, and red powder, falling corners, and debris are not allowed. In order to further reduce the volume, a material with a remanence of 460mT and a magnetic energy product of 33KkJ/m is used. These properties belong to the range of high-grade ferrite magnets. In order to further improve the performance and reduce the volume, FB9 series magnets with higher performance have been developed abroad.
China's power tool industry began to develop from imitation in 1942, and has achieved remarkable achievements after more than half a century of hardships. China has become a major producer and exporter of power tools in the world, with more than 85% of the total domestic production for export. In 2007, the export income of products reached 4.27 billion US dollars, an increase of 19.3% over the same period in 2006. Power tools are developing towards miniaturization, low noise and anti-electromagnetic interference, and constantly develop new structural motors and use new magnets. Bosch, the world's leader in power tools, develops new cordless power tools that use magnets as stators to meet the requirements of miniaturization and energy saving. Due to the high requirements on the ambient temperature of the magnets, the currently used magnets are ferrite permanent magnets accounting for 89%, and NdFeB magnets accounting for 11%. Later, with the improvement of the performance of NdFeB magnets, the proportion used will further increase.
Shijiazhuang Tianshi Magnetic Material Factory is located in Shijiazhuang City, the capital of Hebei Province, where the transportation is convenient and the information is developed. Superior geographical location, accurate market positioning, efficient and professional R&D team, and high-quality products have enabled the company to develop rapidly since its establishment. Shijiazhuang Tianshi Magnetic Material Factory is a supplier specializing in the production of magnets, strong magnets, NdFeB, special-shaped magnets, and magnetic materials. Magnetic columns, etc. The company introduced fully automatic production equipment in 2006 to make the products more excellent and the delivery more punctual. Based on the spirit of mutual benefit and mutual benefit, Tianshi establishes long-term friendly cooperative relations with our customers, and meets the needs of customers with reasonable prices, excellent products, and the fastest speed. Ferrite tile
