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In an electric motor, the magnets on the rotor side play a vital role. These magnets are commonly referred to as permanent magnets, and their function within the motor is to create a stable magnetic field that interacts with the electromagnetic field in the motor’s stationary part (commonly known as the stator), thereby enabling the motor to operate.
The following outlines the functions of permanent magnets in an electric motor:
1. Generating a constant magnetic field
Permanent magnets generate a constant magnetic field within the motor; the polarity of this field generally remains unchanged. This field interacts with the magnetic field produced by the current flowing through the stator, thereby generating rotational torque.
2. Driving the Rotor to Rotate
When current flows through the motor windings in the stator, it generates a magnetic field that interacts with the magnetic field of the permanent magnets. This causes a torque to act on the rotor, causing it to begin rotating. This rotational motion can be utilised to perform various mechanical tasks, such as driving fans, pumps, electric vehicle wheels, and so on.
High-strength arc-shaped magnets commonly used in electric motors
3. Efficient Operation
Permanent magnet motors typically offer high efficiency, as they do not require energy to maintain the magnetic field of the permanent magnets. In contrast, other types of motors may need to consume energy to maintain the electromagnetic field in the stator.
The above outlines the function of the magnets on the rotor side. Our company supplies a wide range of rotor magnets, such as rare-earth arc-shaped magnets, multi-pole bonded neodymium-iron-boron magnets, and injection-moulded rotor magnets with shafts. We welcome enquiries from customers worldwide, and our products are available for export.
Hot selling rotor magnets;
4 pole bonded ndfeb ring rotor magnet 16 x 5 x 20 mm
This is a very small rectangular ferrite block magnet, measuring 2.45 mm in length and 1 mm in both width and height. It is magnetised along its length and is barely noticeable when held in the hand....
7.4x6x5mm Ferrite Small Block Magnet Introduction，Material: Hard Ferrite (Ceramic)，Shape: Block / Rectangle / Bar，Coating: No Coating，Grade (Chinese Stardard): Y30，Operating temperature: -40°C to 250°C，Delivery time: 7-15 days，Magnetization direction: thickness....
U-shaped neodymium magnets are a type of high-performance permanent magnet material with a structure resembling the letter ‘U’. Manufactured from sintered neodymium-iron-boron, they are characterised by high magnetic energy product....
This is a radial 4-pole ring (Hollow cylinder) magnet, the material is bonded NdFeB, with high magnetic performance, the size is 16mm outer diameter, inner hole 5mm, height 20mm, surface gray epoxy treatment, suitable for water pump motor...
This product is a 4-pole ring magnet, injection-molded ferrite material, the sample size is 22mm outer diameter, 7mm inner diameter, 4mm thickness, 2 N poles and 2 S poles, mainly used for push rod motors, magnetic induction devices, encoders, etc.,...
This is a radial 2 pole circular magnet designed specifically for magnetic encoder chips. It is made of sintered neodymium-iron-boron with N35 grade performance and is suitable for standard environments....
This product is a multi pole magnetic ring with an inner diameter of 1.5mm. The material is injection molded ferrite. It adopts axial multi pole magnetization and is mainly used for DC motors. If you have a sample of similar injection molded magnetic products, please contact us for quotation....
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....