0769-23388351
Toggle Navigation
The key technology of ferrite motor design Compared with rare earth permanent magnet motors, ferrite permanent magnet motors have the advantages of high resistance to demagnetization (high temperature) and low cost, but the small residual magnetic density makes the air gap magnetic density of the motor low. Then there are problems such as insufficient permanent magnet torque. Therefore, how to solve the low torque density and save a lot of cost has become a key problem that must be faced.
There are two routes to solve the above problem. One is to obtain a larger air gap magnetic density by means of built-in permanent magnets or tangential magnetic flux. Because the magnetic flux of each pole of the motor is provided by two adjacent permanent magnets in parallel under this rotor magnetic circuit structure, the magnetic flux of each pole of the motor will increase. It makes up for the shortcoming of small remanence density of ferrite material, and belongs to IPM motor in motor classification.
Another route is to use the IPM rotor structure to increase the salient pole ratio of the motor, thereby increasing the reluctance torque of the motor, and using the reluctance torque of the motor to make up for the lack of the permanent magnet torque of the motor. In the classification of the motor, it belongs to the permanent magnet assisted synchronous reluctance motor. Below we list a few classic cases to talk about how ferrite motors can use these methods to improve performance.
This is a multi-layer U-shaped rotor structure, which can not only effectively improve the reluctance torque of the ferrite motor, but also add ferrite permanent magnets in the magnetic barrier gap of the rotor to form a permanent magnet auxiliary reluctance ferrite. body motor to further improve the output power and power density of the motor. At the same time, the system adopts a liquid cooling system and implements a spiral cavity aluminum casing, which can further improve the power density at the system level. In addition, at a higher level, the case uses ferrite motors in the form of rotor stacks, and a reasonable multi-layer arrangement increases torque and power density while better protecting them from faults such as high loads and three-phase short circuits. Effects of sudden demagnetization. And this case also uses a permanent magnet of the same size, which can further reduce the cost of ferrite.
The above information comes from the comprehensive network, our company is a supplier of ferrite magnetic tile (arc magnet), if you need to cooperate with the magnet quotation, please contact us for customization!
Related motor magnet products;
This product is round ferrite magnet with a diameter of 9mm and a thickness of 3mm, the performance class is Y30, magnetized in the thickness direction, without electroplating protective layer, the magnetic force is usually 700-1000gs, the working temperature is -40°C to +250°C, Suitable for sensors, suction parts, electrical appliances, Hall induction....
This is a very small size rectangular block magnet with galvanized surface, 3mm length, 1.5mm width and height, with very fine tolerance, magnetized by lengthwise direction, mainly used in precision electronics, instrumentation, please contact us if you need to buy....
Flat magnets can be flat square magnets or round magnets. Today's sample is a flat rectangular magnet, with a length of 20mm, a width of 10mm, a thickness of 1.5mm, and a zinc coating on the surface. Thickness magnetization is used for thin workpieces. The use of this relatively flat neodymium rectangular magnet requires special attention....
Looking for suppliers of radial 16 pole ring magnet and multi-level magnetic ring, welcome to contact carrich magnet manufacturers in China. We have more than 10 years of experience in the motor magnet industry. Our products have many specifications and good performance, which are highly praised by customers at home and abroad. We welcome to provide specifications, samples and batch prices....
This is a dedicated to screwdrivers, drills on top of the ring magnet, the material is rare earth neodymium, N38 grade, outer diameter 15mm, height 10mm. hole diameter 7mm, the use of very simple, is to set the magnetic ring in the screwdriver (screwdriver head) on top of the purchase of the hole is recommended to be larger 1mm....
Product name: 9.5mm diameter thickness 1.5mm neodymium intense magnetic，Type of magnet: permanent magnet，Magnet shape: Round，Magnet class: n45，Tolerance: ±0.05，Coating: conventional nickel copper nickel，Pull: About 1.6 pounds，Magnetic strength: about 2200 Gauss....
This is a C8 grade ceramic ferrite block rectangle, with white marks made according to the customer's requirements. The magnet size is 13mm long, 11mm wide and 10mm thick. If you are interested in such a magnet, you can contact us to provide you with samples, prices,...
This is a 6-pole ring magnet made of injection molded ferrite, with an outer diameter of 9.5mm, an inner hole of 1mm, a thickness of 2mm, single-sided 6-pole magnetization, 3 N poles and 3 S poles. It is mainly used for Hall encoder....