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Anonymous users2024-02-05A linear motor is a transmission device that converts electrical energy directly into linear motion mechanical energy without the need for any intermediate conversion mechanism. It can be seen as a rotating machine that is radially cut and unfolded into a flat surface. 2：
Linear motor is a kind of linear motion that achieves high precision, and linear motor is a transmission device that converts electrical energy directly into linear motion without any intermediate conversion mechanism. The linear motor is frictionless and moves smoothly. Accuracy retention is good.
3: The main advantages of linear motor are: (1) there is no mechanical contact, the friction is small, the transmission force is generated in the air gap, and there is only friction between the guide rails; (2) Simple structure, small size, linear motion with the least number of parts; (3) The stroke is theoretically unlimited, and the performance will not be affected by the lengthening of the stroke; (4) The speed adjustment range is wide, and high speed is its outstanding advantage; (5) The acceleration is large, which can reach 10g; (6) The movement is stable, because there are few conversion devices; (7) High accuracy and repeatability, no intermediate links, the accuracy of the system depends on the position detection element; (8) Simple maintenance, no mechanical contact during movement...
4: Based on some of the above advantages and the performance of linear motors. The linear motor system can achieve high position accuracy, speed, stability.
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Anonymous users2024-02-04There are articles on this subject, you can search for them directly.
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Anonymous users2024-02-03The working principle of the linear motor: when the primary winding is connected to the AC power supply, it will generate a traveling wave magnetic field in the air gap, and the secondary will induce an electromotive force and generate an electric current under the cutting of the traveling wave magnetic field, and the current will react with the magnetic field in the air gap to produce electromagnetic thrust.
If the primary is fixed, the secondary moves in a straight line under the action of thrust; On the contrary, the primary line motion is done. Drive control technology of linear motorA linear motor application system must not only have a linear motor with good performance, but also have a control system that can achieve technical and economic requirements under safe and reliable conditions.
With the development of automatic control technology and microcomputer technology, there are more and more control methods for linear motors.
Applications of Linear Motors:
The linear motor can be regarded as a deformation of the rotating machine in terms of structure, which can be regarded as a rotating machine that is cut along its radial direction and then flattened and evolved.
With the rapid development of automatic control technology and microcomputer, the positioning accuracy of various automatic control systems has put forward higher requirements, in this case, the linear motion drive device composed of traditional rotating machine plus a set of transformation mechanism has been far from meeting the requirements of modern control system.
Linear motors are mainly used in three aspects: first, they are used in automatic control systems, which are more widely used; secondly, it is a drive motor for long-term continuous operation; Third, it is used in devices that need to provide huge linear motion energy in a short time and short distance.
High-speed maglev train Maglev train is the most typical example of the practical application of linear motors, the United States, Britain, Japan, France, Germany, Canada and other countries are developing linear levitation trains, of which Japan has made the fastest progress.
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Anonymous users2024-02-02Generally, the motor is rotating when it works, but the vehicles driven by rotating motors (such as electric locomotives and trams in the city, etc.) need to do linear motion, and some parts of the machine driven by rotating motors also need to do linear motion. This question was raised decades ago, and now there are motors that move in a linear motion, or linear motors
The principle of linear motor is not complicated Imagine that a rotary induction motor is cut along the direction of the radius and flattened, which becomes a linear induction motor (Fig.) In linear motor, which is equivalent to the stator of a rotating motor, it is called primary; It is equivalent to the rotor of a rotating motor, which is called the secondary The primary is connected to AC, and the secondary is moving in a straight line along the primary under the action of electromagnetic force At this time, the primary should be very long, extending to the position that the motion needs to reach, and the secondary does not need to be so long In fact, the linear motor can make both the primary and the secondary very long; It can be both primary fixed and secondary mobile, and secondary fixed and primary mobile
Linear motor is a new type of motor, which has been widely used in recent years Maglev trains are driven by linear motors
Maglev train is a brand new train General train, due to the friction between the wheels and the rails, which limits the increase in speed, the maximum running speed it can achieve does not exceed 300km n The maglev train is to levitate the train with magnetic force to disengage the train from the guide rail to reduce friction and increase the speed. The train is pulled by a linear motor A stage of the linear motor is fixed on the ground and extends to the distance together with the guide rail; The other stage is installed on the train The primary is connected to the AC, and the train moves along the guide rail The train is equipped with a magnet (some are the coils that also use linear motors), and when the magnet moves with the train, the coil (or metal plate) located on the ground generates an induced current, and the electromagnetic force between the magnetic field of the induced current and the magnet (or coil) on the train levitates the train The advantages of the suspended train are that it runs smoothly, there is no bumps, the noise is small, and the traction force required is small. As long as a few thousand kW of power can make the speed of the suspension train reach 550km h When the suspension train slows down, the change of the magnetic field decreases, the induced current also decreases, and the magnetic field weakens, resulting in a decrease in the suspension force The suspension train is also equipped with a wheel device, its wheels are like an airplane, which can be collected into the train in time when it is moving, and can be put down when it stops to support the train
In order to levitate a huge train by magnetic force, a strong magnetic field is required, and in practice, such a strong magnetic field needs to be generated by a high-temperature superconducting coil
In addition to being used in maglev trains, linear motors are also widely used in other aspects, such as for transmission systems, electric hammers, electromagnetic stirrers, etc. In China, linear motors have also been gradually promoted and applied Although the principle of linear motors is not complicated, it has its own characteristics in terms of design and manufacturing, and the products are not as mature as rotary motors, which need to be further studied and improved
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Anonymous users2024-02-01The working principle and practical application of linear asynchronous motor.
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Anonymous users2024-01-31A linear motor, also known as a linear motor, as the name suggests, is a type of motor that produces linear motion. Linear motors convert electrical energy into mechanical energy of linear motion, and do not require any intermediate transmission conversion device, so it is more efficient than the linear motion formed by the conversion device of a rotary motor.
Linear motors work on the same principle as rotary motors, both rely on electromagnetic force to act. Structurally, a linear motor can be seen as a rotating motor that is cut from the middle and stretched into a straight line: the stator is called the primary and the rotor is called the secondary.
It's just a different name, and it seems to me that there is no stator and rotor image.
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Anonymous users2024-01-30Generally, the motor is rotating when it works, but the vehicles driven by rotating motors (such as electric locomotives and trams in the city, etc.) need to do linear motion, and some parts of the machine driven by rotating motors also need to do linear motion. This question was raised decades ago, and now there are motors that move in a linear motion, or linear motors
The principle of linear motor is not complicated Imagine that a rotating induction motor is cut along the direction of the radius and flattened, which becomes a linear induction motor (figure) In the linear motor, which is equivalent to the stator of the rotating motor, it is called primary; It is equivalent to the rotor of a rotating motor, which is called the secondary The primary is connected to AC, and the secondary is moving in a straight line along the primary under the action of electromagnetic force At this time, the primary should be very long, extending to the position that the motion needs to reach, and the secondary does not need to be so long In fact, the linear motor can make both the primary and the secondary very long; It can be both primary fixed and secondary mobile, and secondary fixed and primary mobile
Linear motor is a new type of motor, which has been widely used in recent years Maglev trains are driven by linear motors
Maglev train is a brand new train General train, due to the friction between the wheels and the rails, which limits the increase in speed, the maximum running speed it can achieve does not exceed 300km n The maglev train is to levitate the train with magnetic force to disengage the train from the guide rail to reduce friction and increase the speed. The train is pulled by a linear motor A stage of the linear motor is fixed on the ground and extends to the distance together with the guide rail; The other stage is installed on the train The primary is connected to the AC, and the train moves along the guide rail The train is equipped with a magnet (some are the coils that also use linear motors), and when the magnet moves with the train, the coil (or metal plate) located on the ground generates an induced current, and the electromagnetic force between the magnetic field of the induced current and the magnet (or coil) on the train levitates the train The advantages of the suspended train are that it runs smoothly, there is no bumps, the noise is small, and the traction force required is small. As long as the power of a few thousand kW can make the speed of the suspended train reach 550km h When the suspension train decelerates, the change of the magnetic field decreases, the induced current also decreases, and the magnetic field weakens, resulting in a decrease in the suspension force The suspension train is also equipped with a wheel device, and its wheels are like airplanes, which can be collected into the train in time when it is moving, and can be put down when it stops to support the train
In order to levitate a huge mass train by magnetic force, a strong magnetic field is required, and in practice, it is necessary to use a high-temperature superconducting coil on land to generate such a strong magnetic field
In addition to being used in maglev trains, linear motors are also widely used in other aspects, such as for transmission systems, electric hammers, electromagnetic stirrers, etc. In China, linear motors have also been gradually promoted and applied Although the principle of linear motors is not complicated, it has its own characteristics in terms of design and manufacturing, and the products are not as mature as rotary motors, which need to be further studied and improved
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