Why does the rotor core of the motor have to be made of metal?

1.The working principle of the motor is that electrical energy is converted into magnetic energy (magnetic field), and the two magnetic fields generate torque (angular thrust and suction) to make the rotor work, and the magnetic energy is converted into mechanical energy. There should be no problem with this principle.

2.Electrical energy is converted into magnetic energy, which is achieved by the alternating current through the coil to create a magnetic field. Here introduces the concept of a magnetic circuit, similar to an electrical circuit.

Because air has a certain permeability, that is to say, the energy of the magnetic field can be lost through the air, which will cause waste of energy and affect the conversion efficiency. Because magnetic flux, like electric current, it will choose the path with low resistance to flow. That is, if there is an object with a greater permeability than air in the magnetic field, the magnetic flux will flow through this object.

The permeability of silicon steel is more than 2000 times that of air, so silicon steel is chosen, so why not choose materials with higher permeability, which is considered from the cost and manufacturing process, just like most of the current channels are copper wires, and only silver is used for very expensive ones. 3.Therefore, the function of the iron core is to give the magnetic flux a smoother path, which is called the magnetic circuit.

The choice of metal is based on magnetic permeability, cost and manufacturing process.

The core of the motor is made of silicon steel, and this material has good magnetic conductivity and poor electrical conductivity. The motor generates a magnetic force through the windings of the coil and uses this magnetic force to operate. However, because the alternating magnetic field generates current in the iron core, if the iron core has a strong conductive ability, it is equivalent to a closed short-circuit circuit and heats up, which is called eddy current.

This is the same principle as the induction cooker heats the bottom of the pot through an electromagnetic field. Therefore, in order to cut off this eddy current, the silicon steel material with poor conductive energy is used, and the silicon steel sheet is taken one by one instead of the overall solid core. In the past, there was a lack of silicon steel sheets, so the iron sheets were coated with insulating paint to solve this problem.

After passing a current in the winding, a magnetic field will be generated in the winding, you must know that the magnet can't see what you can't touch, you can't see the trajectory of the magnetic field it formes, you can only feel the trajectory of his formation through the characteristics of this magnetic field, so we learned electromagnetic induction in middle school, and the teacher used fine iron filings to demonstrate, so that we can see the radial shape of the magnetic field when it exists. Why do you need to use an iron core, because iron is a good conductor of magnetism, and the presence of an iron core will greatly enhance the magnetism, only iron has this property, and other metals do not. For example, if you use a magnet to absorb copper, there is no reaction, and there is no reaction when you absorb pure steel, but it is very good to absorb iron.

Another use of the iron core is to guide the direction, just like the water you draw from the well and use an iron pipe to guide it to the kitchen, it only guides the direction of the road for our use, otherwise it is difficult for us to grasp the radial shape. Therefore, the silicon steel sheet in the transformer we see in life is rectangular and round, which is convenient for us to produce and use.

The rotor core of the motor is to generate a magnetic field through a magnet or a permanent magnet, and its main function is to generate a rotating magnetic field when the motor is running, thereby driving the rotor to rotate. Specifically, the role of magnets has the following aspects:1

Generate a magnetic field: In a motor, a magnetic field is generated when the current passes through the coil, and the magnet on the rotor core can generate a stable magnetic field, so that the magnetic field will not change drastically with the change of current, so as to ensure the stability of the motor operation. 2.

Generate a rotating magnetic field: In a three-phase asynchronous motor, the magnet is designed to a specific shape and position, which can cause the current in the coil to generate torque under the action of the rotating magnetic field, thereby driving the rotor to rotate. 3.

Improve efficiency: The material of the rotor core is made of high permeability material, the magnetic energy of the magnet is higher than that of the magnet, and the permeability of the core is high, which can effectively reduce the loss of the magnet and improve the efficiency of the motor. To sum up, the magnet on the rotor core of the motor is very important, which drives the rotation of the rotor by generating a stable magnetic field and a rotating magnetic field, so as to realize the normal operation of the motor.

The number of turns of the coil of the motor is determined according to the magnetic permeability area, and the thickness of the iron core is an important factor in determining the magnetic permeability area. If the thickness cannot be remedied, then the number of coil turns should be increased as appropriate, the wire diameter should be reduced, and of course, the power will also be reduced.

Summary. It's like this, dear.

It's like this, dear.

The composition of the rotor structure: the rotor core: it is laminated with silicon steel sheets that are generally used by hail gods, which is part of the magnetic circuit.

Rotor winding: It is used to generate induced electric potential and generate electromagnetic torque. Air Gap:

The air gap of medium and small capacity motors is generally in the range.

Why is he in the form of a cylinder.

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Please refer to the schematic diagram of the AC contactor and the circuit diagram of the jog control to talk about how to realize the jog control of the motor.

Dear, there is no circuit diagram,

Magnets, known as natural magnets, are still one of the most important magnets due to their excellent adaptability to high temperatures. Alnico can work normally at high temperatures above 500 °C, which is the biggest feature, and the corrosion resistance is also stronger than other magnets.

Its metal composition is different, the magnetic properties are different, so the use of Mingqing is also different, mainly used in various sensors, instruments, electronics, electromechanical, medical, teaching, automobile, aviation, military technology and other fields. Alnico magnets are one of the oldest magnets, known as natural magnets, and although they are the oldest, their excellent adaptability to high temperatures makes them still one of the most important magnets. Alnico can work normally at a high temperature of more than 500 °C, which is its biggest feature, and its corrosion resistance is also stronger than its imitation magnet.

The rotor core of the motor is used to generate a magnetic field, so it is necessary to use a permeable material. At present, it has been found that the best paramagnet metal is iron, so the rotor core is mostly made of ferrosilicon alloy, that is, silicon steel sheet, and metals such as gold, silver, copper, tin, and aluminum are non-magnetic metals, so they are not good. Not so much for non-metals.

High-frequency and low-power special motors can sometimes be made of high-frequency ferrite materials similar to ceramic structures.

Because materials with high permeability are metallic! For example, the silicon steel sheet used in the stator and rotor core of the motor!

The motor is an electromagnetic induction element! It is impossible to leave the conductor!

Use silicon steel, because it conducts magnetism. There is no other magnetically conducting thing that can be replaced.

The motor is not allowed to be used in this way, the iron core is not the same length, its magnetic cutting line is not the same, which will lead to slight damage to the serial shaft, that is, to replace the bearing, serious will cause the motor to sweep and bor, the shaft is damaged, and the motor is burned.

The length of the rotor and stator of the motor is not the same, and the magnetic cutting line of the motor is not the same, which will lead to the serial shaft, and the slight damage is to replace the bearing, and the serious one will cause the motor to burn out.

Motor rotor: It is also a rotating part in a motor. The motor is composed of two parts, the rotor and the stator, which is used to realize the conversion of electrical energy and mechanical energy and mechanical energy and electrical energy. Motor rotors are divided into motor rotors and generator rotors.

The stator is the stationary part of the motor. The stator is composed of three parts: the stator core, the stator winding and the machine base. The main function of the stator is to generate a rotating magnetic field, while the main function of the rotor is to be cut by magnetic field lines in the rotating magnetic field to produce (output) current.

In the absence of mechanical movement. In terms of electrical performance alone, 1, the current is larger than the original, the magnetic flux is larger than the original, 3, the magnetic leakage is smaller than the original4, and the heat capacity is larger than the original. The electrical performance is better than the original.

I learned in elementary school that the device composed of an iron core and an energized coil is called an electromagnet (the rotor in the motor is the electromagnet), so the iron core is the core of the electromagnet and is a necessary part of the electromagnet (there are three iron cores in the rotor, so it can be seen that it is indispensable).

The stator core of the motor, wound with a suitable winding, will convert the electrical energy into magnetic energy by the iron core, generating a rotating magnetic field.

For the finished motor, the core of Keyu motor plays a key role in the motor accessories. In order to improve the overall performance of a motor, it is necessary to improve the performance of the motor core. Usually this performance can be solved by improving the material of the core punch, adjusting the permeability of the material, and controlling the size of the iron loss.

When the core around the coil is energized, it generates an alternating magnetic field, with which the motor rotates.