Many people have such questions, why some motor rotors are magnets? Some are not? why is that? Today, the manufacturer of courage magnets will give you the answer.
Anything that uses permanent magnets as a stator or rotor is a DC motor. The coil current of the DC motor must be commutated through the commutator to achieve continuous rotation. Brush commutation is widely used due to its simple structure and low technical requirements. It was not until later that brushless DC motors using electronic commutation appeared. Ordinary DC motors can only make magnets into stators to rotate the coils because the coil current needs to be commutated. The brushless DC motor has no mechanical commutator, the coil is made into the stator, and the magnet is made into the rotor. There are exceptions to everything. There is no magnet in the AC motor, and the current in the coil is also naturally commutated, so the coil can be made into both a stator and a rotor. The rotor can be an inner rotor or an outer rotor.
Motor arc segmented ferrite magnets
The coil is used as the rotor of the asynchronous motor. The rotating magnetic field generated by the stator winding rotates faster than the rotor speed. The rotating magnetic field and the rotor coil have a speed difference. The rotating magnetic field cuts the coil to generate an induced current, so that the rotor coil generates an induced magnetic field.
Generally speaking, brushed motors use coils as rotors, and brushless motors use magnetic steel as rotors.
Common magnet categories for motor rotors;
Motor magnet related problems;
Requirements of brushless motor for magnet
Temperature resistance and surface treatment of brushless DC motor magnets
The magnets used in hard disk drives are very strong neodymium (rare earth) magnets. Typically a magnet will have a north pole on one face, and a south pole on the other face. Hard drive magnets differ in that they act like two magnets stuck together side by side. On one face there is a north pole on the left and a south pole on the right, on the other face there is a south pole on the left and a north pole on the right....
This is a thick arc segmented magnet, the material is rare earth NdFeB, the surface coating is zinc, it is mainly used for permanent magnet DC motor, it is a non-standard custom magnet, the size, temperature resistance, coating, etc. Customized according to your requirements, welcome customers from Spain, Italy, the United Kingdom, Nigeria, the United States, Canada and other countries to consult the price,...
Magnet Name: Custom shape 6 inches large ring super strong magnet,Application: Industrial, mechanical equipment, test,Large ring can be processed to more than 200 mm, magnetic super strong, operation need to pay special attention to, if you need to get a preferential price, please send us an inquiry, we will provide you with satisfactory product quality....
Height 31.3mm arc sectioned neodymium magnet introduction; Manufacturer: Courage Magnet。Type of magnet: neodymium arc curved magnets。Magnet size: Curved magnet outer diameter 7.4, inner diameter 5, height 31.6, 90° See the drawing below...
This product is a tiny size cubic permanent magnet, the material is rare earth NdFeB, N52 grade (other grades are available), the magnetic strength is higher than 4200 gauss, the length, width and height are 3mm, the surface is nickel-plated with silver-white color, suitable for precision electronic products, meters, instruments。...
Gold-plated magnets are very beautiful in appearance and are often used in jewelry, lamps and other industries. The coating is nickel-copper-nickel+gold, which mainly plays a decorative role. We can produce gold-plated neodymium magnets of various shapes according to your requirements, such as round, Square, rectangle, cube, arc, etc....
This product is a round magnet with a diameter of 40mm and a thickness of 20mm. The material is NdFeB, it belongs to permanent magnet, the surface is nickel-plated (nickel-copper-nickel), we are a magnet factory in China, the price may be more advantageous than what you buy now, welcome to consult....
This product is a cylindrical neodymium magnet with a diameter of 2mm and a thickness of 5mm, axial magnetization, N52 grade, about 0.12g in weight, and about 300g in holding force. Does it seem a bit inconsistent? Used in models, photo frames, toys, glasses, if you are interested in this small magnet, please send us an inquiry....