Electromagnetic linear synchronous motor

Abstract

The invention discloses an electromagnetic linear synchronous motor, and relates to the field of motors, the electromagnetic linear synchronous motor comprises a stator, a mover and a Hall sensor, the stator comprises a primary stator core and a stator winding, the surface of the stator core is provided with a mounting groove for fixing the stator winding, and the mover is slidably arranged relative to the stator; the rotor comprises a linear generator iron core and a secondary excitation coil, the surface of the linear generator iron core is provided with an installation groove used for fixing the secondary excitation coil, and the two ends of the rotor are fixedly provided with Hall sensors used for detecting the position and the speed. The size and the direction of an electromagnetic field can be accurately controlled, the electromagnetic excitation motor can realize on-demand power supply, unnecessary energy waste is avoided, and the electromagnetic excitation system is simple in structure and few in component number, so that the fault rate is relatively low, the reliability and the stability of equipment are improved, and the cost is reduced. The electromagnetic excitation motor can be automatically adjusted according to different load conditions, and it is ensured that the motor can normally operate under any load.

Description

Technical Field

[0001] The invention relates to the field of electric motors, in particular to an electromagnetic linear synchronous motor. Background Art

[0002] The linear motor is mainly composed of three parts: the stator, the mover and the air gap. The stator is similar to the stator of a rotary motor and is the part that generates the magnetic field; the mover is similar to the rotor of a rotary motor and is the part that induces the magnetic field and generates linear motion; the air gap is the air gap between the stator and the mover, which is responsible for the transmission of the magnetic field. When current is passed through the coil on the stator, a magnetic field is generated. This magnetic field is distributed in a straight line in the air gap, forming an open magnetic field. When the conductor in the mover moves in the magnetic field, an induced electromotive force is generated in the conductor according to the principle of electromagnetic induction. This induced electromotive force is related to the movement speed of the mover and the strength of the magnetic field.

[0003] In the prior art, the stator is usually excited by permanent magnetic materials. This method generates greater thrust than ordinary electric excitation at the same power, but the excitation flux cannot be adjusted, so the thrust and speed of the stator cannot be adjusted. In order to obtain sufficient magnetic energy product and magnetic flux, permanent magnetic materials usually require a large volume and weight, which increases the overall weight and cost of the equipment. The stability of permanent magnetic materials is relatively poor and is easily affected by environmental factors such as temperature and humidity, resulting in a decrease in magnetic properties. Summary of the invention

[0004] The object of the present invention is to provide an electromagnetic linear synchronous motor to solve the above-mentioned technical problems.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An electromagnetic linear synchronous motor comprises a stator, a mover and a Hall sensor 5. The stator comprises a primary stator core 1 and a stator winding 2. A mounting groove for fixing the stator winding 2 is provided on the surface of the stator core 1. The mover is slidably arranged relative to the stator. The mover comprises a linear generator core 3 and a secondary excitation coil 4. A mounting groove for fixing the secondary excitation coil 4 is provided on the surface of the linear generator core 3. Hall sensors 5 for detecting position and speed are fixedly arranged at both ends of the mover.

[0007] The stator winding is composed of two sections, and each section of the coil is independently wound, independently powered on, and independently powered off.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] 1. In the present invention, through the setting of the stator winding 2, the excitation mode is electromagnetic excitation, which can accurately control the size and direction of the electromagnetic field. The electromagnetic excitation motor can realize power supply on demand and avoid unnecessary energy waste. The electromagnetic excitation system has a simple structure and a small number of components, so the failure rate is relatively low, which improves the reliability and stability of the equipment. The electromagnetic excitation motor can automatically adjust according to different load conditions to ensure that the motor can operate normally under any load.

[0010] 2. In the present invention, the position of the mover and the speed of the mover can be accurately detected by setting the Hall sensor 5, and the Hall sensor has a strong ability to resist external magnetic field interference and can work normally in a strong magnetic field environment.

[0011] 3. In the present invention, by setting the stator winding 2 in sections, each section of the coil is independently wound, independently energized, and independently de-energized, so that the magnetic field generated by the coil can be precisely controlled. Not only can the movable area of ​​the mover be controlled, that is, the power can be turned off in the area where the mover is prohibited from reaching, and the power can be turned on in the area where the mover can move, but also the effect of energy saving can be achieved, that is, the area where the mover is about to reach and the moving area are energized, and the power can be turned off in the area where the mover has not reached and the area where it has passed. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention;

[0013] In the figure: 1. Primary electronic core; 2. Stator winding; 3. Linear motor core; 4. Secondary excitation coil; 5. Hall sensor. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] See also Figure 1 In an embodiment of the present invention, an electromagnetic linear synchronous motor includes a stator, a mover, and a Hall sensor 5. The stator includes a primary stator core 1 and a stator winding 2. The surface of the stator core 1 is provided with a mounting groove for fixing the stator winding 2. The mover is slidably arranged relative to the stator. The mover includes a linear generator core 3 and a secondary excitation coil 4. The surface of the linear generator core 3 is provided with a mounting groove for fixing the secondary excitation coil 4. Hall sensors 5 for detecting position and speed are fixedly arranged at both ends of the mover. The electromagnetic excitation method can not only accurately control the size of the magnetic field, but also realize on-demand power supply to avoid energy waste.

[0016] Among them, the stator winding coil is composed of segments, and each part can be energized or deenergized independently. The segmented energization can finely control the magnetic field generated by the coil, which can not only control the movable area of ​​the mover, that is, the power can be turned off in the area where the mover is prohibited from reaching, and the power can be turned on in the area where the mover can move, but also achieve the effect of energy saving, that is, the area where the mover is about to arrive and the moving area are energized, and the area where the mover has not arrived and the area where it has passed can be deenergized.

[0017] The working principle of the present invention is: when current is passed through the stator winding and the secondary excitation coil, a magnetic field will be generated. The magnetic field of the mover interacts with the magnetic field of the stator magnet to form a composite magnetic field. When the conductor in the mover moves in the composite magnetic field, an induced electromotive force will be generated in the mover according to the principle of electromagnetic induction. This induced electromotive force is related to the movement speed and magnetic field strength of the mover. According to the Lorentz force principle, the current in the mover will be affected by the composite magnetic field. This force is perpendicular to the current and the composite magnetic field, and acts on the conductive coil of the mover, pushing the mover to move in a straight line along the stator. The alternating polarity of the stator ensures that the mover moves continuously along the direction of the magnetic field. By controlling the magnitude and direction of the current in the stator coil, precise control of the mover movement can be achieved.

[0018] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An electromagnetic linear synchronous motor, comprising a stator, a mover, and a Hall sensor (5), characterized in that: The stator comprises a primary stator core (1) and a stator winding (2); a mounting groove for fixing the stator winding (2) is provided on the surface of the stator core (1); the mover is slidably arranged relative to the stator; the mover comprises a linear generator core (3) and a secondary excitation coil (4); a mounting groove for fixing the secondary excitation coil (4) is provided on the surface of the linear generator core (3); and Hall sensors (5) for detecting position and speed are fixedly arranged at both ends of the mover.

2. The electromagnetic linear synchronous motor according to claim 1, characterized in that: The stator winding (2) is composed of sections, and each section of the coil is independently wound, independently powered, and independently powered off.

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