Round Magnets for Mini Audio System/3C Products

Widely used for computer speaker, blue tooth audio, home audio and so on. The machining tolerance can reach +/-0.02mm. The coatings are mostly NiCuNi, which can endure at least 48h SST. Majority of them have the material grade from N grade to M grade.

The field of electronic products is a traditional application field for high-performance neodymium iron boron materials. The electroacoustic components (micro microphones, micro speakers/receivers, Bluetooth earphones, high fidelity stereo earphones), vibration motors, camera focusing, and even future sensor applications, wireless charging, and other functions in smartphones all require the application of the strong magnetic properties of neodymium iron boron.

1.How to design and select the most cost-effective magnet that meets customer needs?

Magnets are classified into different grades based on their ability to withstand temperature; According to different usage requirements, the same brand is divided into different performance levels, and different performance levels correspond to different performance parameters. In general, designing and selecting the most cost-effective magnet requires the customer to provide the following relevant information,

▶ Application fields of magnets
▶ Material grade and performance parameters of the magnet (such as Br/Hcj/Hcb/BHmax, etc.)
▶ The working environment of the magnet, such as the normal working temperature of the rotor and the maximum possible working temperature
▶ The installation method of the magnet on the rotor, such as whether the magnet is surface mounted or slot mounted?
▶ Machining dimensions and tolerance requirements for magnets
▶ Types of magnetic coating and anti-corrosion requirements
▶ Requirements for on-site testing of magnets (such as performance testing, coating salt spray testing, PCT/HAST, etc.)