0769-23388351

Why are some motor rotors is magnets? Some are not?

Addtime:2024-05-13 15:35:08 Click:643

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

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;

Neodymium Arc Segment Magnets

Bonded Neodymium Magnets


Motor magnet related problems;

Requirements of brushless motor for magnet

Temperature resistance and surface treatment of brushless DC motor magnets

Glue for electric motor magnets

MAGNET PRODUCT RECOMMENDATION

Injection molded ferrite magnetic rotors for permanent magnet motors

This is a multi-pole ferrite magnetic assembly, composed of injection molded ferrite + shaft, also known as injection molded ferrite magnetic rotor magnet, rotor OD 29.8mm, height 7.5mm, shaft 3.17mm...

N52 dia 6mm x 6mm cylinder neodymium magnet 4820 gauss

Product Name: 6x6mm cylindrical neodymium magnet, Color: silver white, Manufacturer: courage magnet, N35 is about 4100 Gauss, and n52 is about 4800 Gauss, We have a great price advantage in the production of high-performance magnets. We look forward to your consultation!...

Small and thin block strong magnet 5x2x1mm 8x2.5x1.5mm

This product is a small magnet, made of neodymium with galvanized surface. How small are these magnets? 5mm, 8mm in length, 2mm in width, 2.5mm in width, 1mm in thickness, 1.5mm in thickness, if you are interested in such small neodymium block magnets, you can tell us the size you actually need, and...

Hole 60mm sintered ferrite magnet ring y25 120x60x20mm

You are now viewing a ceramic ferrite ring magnet with 60mm bore (center hole), 120mm outer diameter, 20mm thickness, medium to large size magnet, no plating on surface, especially suitable for speakers, horns, salvage, fishing, and mechanical equipment,...

Small ring magnets neodymium material 8mm x 4mm x 2mm

Introduction of small size ring neodymium magnet; Product name: Nickel-plated strong neodymium small ring magnet,Performance level: N35 (can be customized for higher performance),Product size: 8mm diameter, 2mm thickness, 4mm middle hole...

Super Thin Rectangular NdFeb Magnets 40x25x1.5mm

This is a thin rectangular block neodymium magnet, the specific specifications are length 40mm, width 25mm, thickness 1.5mm, strong magnetic force, N35 grade, magnetized in the thickness direction, suitable for ceiling lamps, crafts, home furnishing, electronic products, can be matched with 3M back glue to use....

N35M 11mm OD x 2mm ID x 5mm H Ring Magnet 11x2x5

This is a small size ring rare earth magnet, N38M grade, the outer diameter of the ring is 11mm, the hole is 2mm, which is also relatively small, the thickness is 5mm, the surface is plated with bright nickel, this type of magnet is suitable for passing through some thin shafts....

10x2mm N52 neodymium disk magnets 2430 gauss weight 1.2g

This is a very hot neodymium round magnet size, diameter 10mm, thickness 2mm, in many areas can be applied, the only difference is that different customers choose the coating, performance level and temperature resistance performance on the difference, the magnet weighs about 1.2g....

WHAT ARE YOU STILL HESITATING? CONTACT US NOW!

CONTACT NOW