A radiant ring is a special type of circular permanent magnet that is magnetized radially along the circumference.
What is Radiant Ring？
Features
Structural Advantage: As an integral magnetic ring, it is easier to control the dimensional accuracy than the traditional spliced magnetic ring. The assembly process is more simplified without the need for a soft magnetic material frame structure for fixation, reducing the magnetic flux loss.
Magnetic Field Characteristics: The surface field is sinusoidal, evenly distributed, and has a small transition area between magnetic poles. It can be magnetized in single-pole radiation, multi-pole direct charging, and multi-pole oblique charging, providing more flexibility for magnetic circuit design.
Performance: It can make the motor run stably with low noise. Meanwhile, due to the diversity of its magnetization methods and magnetic field distribution, it can meet the magnetic performance requirements of different application scenarios.
Classification
By Orientation Mode: It can be divided into magnetic field orientation and pressure orientation magnetic rings. Sintered or bonded magnetic rings are mostly magnetic field oriented, while hot-pressed/hot-deformed magnetic rings are mostly pressure oriented.
By Material: It includes ferrite permanent magnet rings, rare earth permanent magnet rings, and other permanent magnet rings. Rare earth permanent magnet rings mainly include samarium cobalt permanent magnet rings and neodymium iron boron permanent magnet rings. Sintered or hot-pressed/hot-deformed neodymium iron boron magnetic rings have the highest magnetic performance.
By Shape: Thick-walled rings have an inner-to-outer diameter ratio of less than 0.7, while thin-walled rings have a ratio greater than 0.9.
What permanent magnets are used in the radiating ring?
Neodymium (NdFeB) Magnets: These are the most powerful commercially available magnets and are widely used in applications that require strong and compact magnetic fields. Neodymium magnets offer high magnetic strength, which is crucial for efficient energy transfer in a radiating ring system.
Samarium-Cobalt (SmCo) Magnets: These magnets are known for their high resistance to temperature changes and corrosion. While they are not as strong as Neodymium magnets, SmCo magnets offer good stability and durability, making them suitable for environments with higher temperatures or corrosive conditions.
Alnico Magnets: Though not as strong as NdFeB or SmCo magnets, Alnico magnets are still used in some radiating ring systems due to their ability to maintain a stable magnetic field over time. They are also more resistant to demagnetization, but their magnetic strength is generally lower.
