Linear motor based on electromagnetic force

Abstract

The invention relates to the technical field of dynamic mechanical properties, and particularly discloses an electromagnetic force-based linear motor, which comprises a power supply conductor, a plurality of stator conductors, a rotor stabilizing device, a plurality of stator fixing devices, a stator isolation device, a rotor device, a rotor conductor and a rotor lead, the plurality of stator fixing devices are fixed on the ground and are arranged in parallel; a stator isolation device is arranged on the inner side of the stator fixing device; the plurality of stator conductors are respectively arranged at the central position of the stator fixing device and are connected through a wire at one end of the stator fixing device; the power supply conductor and the rotor stabilizing device are arranged on the same stator fixing device and are arranged in parallel; the power supply conductor is connected with the rotor conductor through a rotor lead; the rotor device and the stator isolation device are arranged below the power supply conductor, and a radial gap is reserved between the rotor device and the stator isolation device.

Description

Technical Field

[0001] The present invention relates to the technical field of dynamic mechanical properties, and particularly to a linear motor based on electromagnetic force. Background Art

[0002] Compared with rotary motors, linear motors have a simple structure, strong adaptability, and do not require an intermediate conversion mechanism. Due to the absence of the constraint of centrifugal force, ordinary materials can also reach a relatively high speed, making them suitable for high-speed linear motion. Moreover, based on different voltages, frequencies, and secondary materials, different speeds and electromagnetic thrusts can be obtained, and they are also applicable to low-speed reciprocating operation scenarios.

[0003] Existing linear motors are divided into two types: contact type and suspension type. In the contact type linear motor, since the rotor and stator are arranged in series, in order to ensure the continuity of the current, a strong pressure is required between the stator and the rotor, which easily causes excessive friction and ablation on the inner side of the track, and only pulsed current can be used for driving; the suspension type linear motor has no problem of frictional loss, but has a high precision requirement in terms of control, is prone to generating "reverse force" due to control problems, and has a high manufacturing cost.

[0004] Therefore, it is necessary to invent a linear motor with less frictional loss, simple control, and capable of using steady current or pulsed current. Summary of the Invention

[0005] In view of the above problems, the object of the present invention is to provide a linear motor based on electromagnetic force, which has less frictional loss, simple control, and can use steady current or pulsed current.

[0006] The present invention provides a linear motor based on electromagnetic force, comprising: a power supply conductor, a plurality of stator conductors, a rotor stabilizing device, a plurality of stator fixing devices, a stator isolation device, a rotor device, a rotor conductor, and a rotor lead;

[0007] The plurality of stator fixing devices are fixed on the ground and arranged in parallel; the stator isolation device is arranged inside the stator fixing device;

[0008] The plurality of stator conductors are respectively installed at the central positions of the stator fixing devices, and the plurality of stator conductors are connected by wires at one end of the stator fixing devices;

[0009] The power supply conductor and the rotor stabilizing device are installed on the same stator fixing device and arranged in parallel; the power supply conductor is connected to the rotor conductor through the rotor lead;

[0010] The rotor device and the stator isolation device are both arranged below the power supply conductor, and a radial gap is left between the rotor device and the stator isolation device;

[0011] When powered on, the stator conductor generates a stator magnetic field inside the stator fixing device. The power supply direction of the rotor is the same as the direction of the excitation current of the stator conductor. A current is passed through the rotor conductor in the stator magnetic field, and the rotor conductor is subjected to a transverse Lorentz force, and the transverse direction is the moving direction of the rotor device.

[0012] In a possible implementation, the instantaneous Lorentz force F(t) can be expressed by the following formula:

[0013]

[0014] Where B(L,t) is the magnetic induction intensity, I(t) is the current intensity passing through the rotor conductor, L is the length of the rotor conductor, and t is time.

[0015] In a possible implementation, a first groove is provided on the stator fixing device, and the first groove is used to fix the stator conductor;

[0016] A second groove is provided on the rotor stabilizing device.

[0017] In a possible implementation, the rotor conductor and the stator conductor are independently powered.

[0018] In a possible implementation, when the stator conductor and the rotor conductor are powered on simultaneously, the rotor conductor drives the rotor device to move forward, and the currents of the rotor conductor and the stator conductor are in the same direction;

[0019] When the rotor needs to decelerate, the currents of the rotor conductor and the stator conductor are in opposite directions.

[0020] In a possible implementation, the rotor stabilizing device is a semi-cylinder, which is used to prevent the rotor device from moving left and right.

[0021] In a possible implementation, there are grooves on both sides of the rotor device, and the rotor stabilizing device is fixed in the grooves.

[0022] In a possible implementation, the stator isolation device is a flat semi-cylinder, which is used to prevent current from being generated between the stator conductor and other positions.

[0023] In a possible implementation, the current is a steady current or a pulsed current.

[0024] In a possible implementation, the current density and the generated magnetic induction intensity performance indexes of the power supply conductor, the stator conductor, and the rotor conductor are all the same.

[0025] The linear motor based on electromagnetic force provided by the present invention has relatively small frictional losses, simple control, and can use steady current or pulsed current at the same time. Brief Description of the Drawings

[0026] Figure 1 It is a three-dimensional view of the linear motor provided by the present invention;

[0027] Figure 2 It is a diagram of the electromagnetic force relationship between the stator and rotor of the linear motor provided by the present invention;

[0028] Figure 3 It is a structural diagram of the rotor stabilizing device provided by the present invention;

[0029] Figure 4 It is an equivalent circuit diagram of the linear motor provided by the present invention;

[0030] Description of the Reference Numerals in the Drawings:

[0031] 1 - power supply conductor; 2 - stator conductor; 3 - rotor stabilizing device; 4 - stator fixing device; 5 - stator isolation device; 6 - rotor device; 7 - rotor conductor; 8 - rotor lead; 9 - first groove; 10 - second groove. Detailed Embodiment

[0032] The following further describes in detail the embodiments of the present invention in conjunction with the drawings and examples. The detailed description and drawings of the following examples are used to exemplarily illustrate the principle of the present invention, but cannot be used to limit the scope of the present invention, that is, the present invention is not limited to the described preferred embodiments, and the scope of the present invention is defined by the claims. <{

[0033] In the description of the present invention, it should be noted that unless otherwise specified, the meaning of "a plurality of" is two or more; the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Combined with Figures 1-4 , the present invention provides a linear motor based on electromagnetic force, including: a power supply conductor 1, a plurality of stator conductors 2, a rotor stabilizing device 3, a plurality of stator fixing devices 4, a stator isolation device 5, a rotor device 6, a rotor conductor 7, and a rotor lead 8;

[0035] A plurality of stator fixing devices 4 are fixed to the ground and arranged in parallel; a stator isolation device 5 is arranged inside the stator fixing device 4; a plurality of stator conductors 2 are respectively installed at the central positions of the stator fixing devices 4, and the plurality of stator conductors 2 are connected by wires at one end of the stator fixing device 4; the power supply conductor 1 and the rotor stabilizing device 3 are installed on the same stator fixing device 4 and arranged in parallel; the power supply conductor 1 is connected to the rotor conductor 7 through a rotor lead 8; the rotor device 6 and the stator isolation device 5 are both arranged below the power supply conductor 1, and a radial gap is left between the rotor device 6 and the stator isolation device 5;

[0036] Among them, the power supply is connected to the rotor conductor 7 through the power supply conductor 1 and the rotor lead 8, and the connection position of the rotor lead 8 and the rotor conductor 7 is encapsulated in the rotor device 6. The rotor power supply direction is the same as the stator conductor excitation current direction; the self-weight of the rotor device 6 acts on the rotor lead 8, and the rotor stabilizing device 3 hardly receives a vertical force, so that the rotor lead 8 is in close contact with the power supply conductor 1, and the power supply conductor 1, the rotor lead 8 and the rotor conductor 7 form a loop with the power supply.

[0037] During high-speed movement, the rotor conductor 7 and the rotor lead 8 are simultaneously subjected to electromagnetic forces. Therefore, the horizontal angle of the rotor lead 8 is as small as possible to reduce the electromagnetic resistance it receives in the armature movement direction.

[0038] The stator conductor 2 adopts a cuboid structure. Due to the skin effect caused by high-speed large current, the current density will increase on the inner side of the conductor.

[0039] When not energized, the rotor device 6 and the stator fixing device 4 are stationary, and the rotor device 6 is supported by the power supply conductor 1.

[0040] When energized, the stator conductor 2 generates a stator magnetic field inside the stator fixing device 4. Combining Ampere's law, electromagnetic laws and electromagnetic induction laws, a magnetic field in the vertical direction is generated on the horizontal plane of the rotor device 5. Since the stator current directions on both sides are opposite, the magnetic field directions generated at the center are the same. The rotor power supply direction is the same as the stator conductor excitation current direction. The rotor conductor 7 is energized in the stator magnetic field, and the rotor conductor 7 is subjected to a transverse Lorentz force, and the transverse direction is the moving direction of the rotor device 6. When energized, the rotor conductor and the stator conductor are on the same horizontal plane, and the rotor conductor drives the rotor device and the rotor lead to move quickly.

[0041] When the rotor device 6 moves forward, the current of the stator conductor 2 continuously generates an upward magnetic field in the rotor device 6. When the current acts continuously, the speed of the rotor device increases rapidly.

[0042] When the rotor device 6 needs to decelerate and stop, the energized current of the stator conductor 2 reverses, and the generated magnetic field direction reverses at this time. The rotor conductor 7 changes from the received forward force to a resistance force, and the speed decreases rapidly.

[0043] In a possible implementation, the instantaneous Lorentz force F(t) can be expressed by the following formula:

[0044]

[0045] where B(L,t) is the magnetic induction intensity, I(t) is the current intensity passing through the rotor conductor, L is the length of the rotor conductor, and t is the time.

[0046] In a possible implementation, the stator isolation device 6 and the stator fixing device 4 are made of non-conductive materials. The stator conductor 2 is made of the conductive material copper. The rotor stabilizing device 3 is made of the light material epoxy resin with a relatively high hardness. The rotor conductor 7 is the high-conductive material copper. The surfaces of the rotor stabilizing device 3, the rotor device 6, and the stator isolation device 5 are all made of wear-resistant materials. The material of the rotor device 6 is the light material epoxy resin with a relatively high hardness, and its function is to increase the pressure between the rotor lead 8 and the power supply conductor 1. When the stator conductor 2 and the rotor conductor 7 are energized simultaneously, the rotor conductor 7 drives the rotor device 6 to move forward.

[0047] In a possible implementation, a first groove 9 is provided on the stator fixing device 4, and the first groove 9 is used to fix the stator conductor 2; a second groove 10 is provided on the rotor stabilizing device 4.

[0048] In a possible implementation, the rotor conductor and the stator conductor are independently powered, effectively reducing the frictional losses of the rotor and the stator.

[0049] In a possible implementation, the power supply conductor 1 and the rotor lead 8 are placed outside the equipment, making it easier to repair and replace.

[0050] In a possible implementation, when the stator conductor and the rotor conductor are energized simultaneously, the rotor conductor 7 drives the rotor device 6 to move forward, and the currents of the rotor conductor 7 and the stator conductor 2 are in the same direction; when the rotor needs to decelerate, the currents of the rotor conductor 7 and the stator conductor 2 are in the opposite direction.

[0051] In a possible implementation, the rotor stabilizing device 3 is a semi-cylinder, which is used to prevent the rotor device from moving left and right. There are grooves on both sides of the rotor device 6, and the rotor stabilizing device 3 is fixed in the grooves, and the inner side of the grooves fits with the semi-cylinder without acting force.

[0052] In a possible implementation, the stator isolation device 5 is a flat semi-cylinder. On the one hand, it minimizes the isolation space as much as possible. On the other hand, it reduces the resistance of the slight friction between the stator isolation device 5 and the rotor device 6, and prevents the stator conductor 2 from generating current at other positions. The flat semi-cylinder can prevent the rotor device 6 from moving left and right, and the rotor stabilizing device 3 is fixed in a groove.

[0053] In a possible implementation, the current is a steady current or a pulsed current. At the same time, the rotor speed can be controlled in combination with the actual engineering situation. Since the current on the rotor conductor 7 is the same, but the magnetic induction intensities at different positions are different, when a steady-state current is applied, only a steady magnetic field B is generated. When a pulsed current is applied, a pulsed magnetic field and an induced electric field will be generated.

[0054] In a possible implementation, the current densities and the performance indexes of the magnetic induction intensities generated by the power supply conductor 1, the stator conductor 2 and the rotor conductor 7 are the same.

[0055] For the linear motor based on electromagnetic force provided by the present invention, since the rotor and the stator do not directly contact, the ablation loss caused by high-speed friction is significantly reduced. And based on the stator generating a constant magnetic field, the rotor device moves at a high speed under the action of the Lorentz force. Only by controlling the voltage, frequency and secondary material can the target speed be achieved, reducing the control cost of the linear motor. The present invention can be widely used as power in load-carrying equipment, rail locomotives, military equipment, industrial and agricultural machinery, etc.

[0056] It should be clear that the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application. The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "the" and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0057] The various embodiments in this specification are described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0058] It should be noted that in this specification, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the above elements. It should be understood that the term "and / or" used herein is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0059] It should be noted that the orientation terms such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described from the angles shown in the drawings and should not be construed as limiting the embodiments of the present application. In addition, in the context, it should also be understood that when it is mentioned that one element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element.

[0060] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", "one specific embodiment" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic description of the terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. Although the specific implementation schemes have been described above, even if only a single implementation scheme is described with respect to a specific feature, these implementation schemes are not intended to limit the scope of the present disclosure. Unless otherwise stated, the examples of the features provided in the present disclosure are illustrative rather than restrictive. The above description is intended to cover those alternative forms, modifications and equivalent forms that will be apparent to those skilled in the art and have the beneficial effects of the present disclosure.

[0061] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A linear motor based on electromagnetic force, characterized in that, Comprising: A power supply conductor (1), a plurality of stator conductors (2), a rotor stabilizing device (3), a plurality of stator fixing devices (4), a stator isolation device (5), a rotor device (6), a rotor conductor (7) and a rotor lead (8); A plurality of the stator fixing devices (4) are fixed on the ground and arranged in parallel; the stator isolation device (5) is arranged inside the stator fixing device (4); A plurality of the stator conductors (2) are respectively installed at the central positions of the stator fixing devices (4), and the plurality of stator conductors (2) are connected by wires at one end of the stator fixing devices (4); The power supply conductor (1) and the rotor stabilizing device (3) are installed on the same stator fixing device (4) and arranged in parallel; the power supply conductor (1) is connected to the rotor conductor (7) through the rotor lead (8); The rotor device (6) and the stator isolation device (5) are both arranged below the power supply conductor (1), and there is a radial gap between the rotor device (6) and the stator isolation device (5); When energized, the stator conductor (2) generates a stator magnetic field inside the stator fixing device (4), the rotor power supply direction is the same as the direction of the exciting current of the stator conductor, the rotor conductor (7) conducts current in the stator magnetic field, and the rotor conductor (7) is subjected to a transverse Lorentz force, and the transverse direction is the moving direction of the rotor device (6).

2. The linear motor according to claim 1, wherein The instantaneous Lorentz force F(t) can be expressed by the following formula: Wherein, B(L,t) is the magnetic induction intensity, I(t) is the current intensity passing through the rotor conductor, L is the length of the rotor conductor, and t is the time.

3. The linear motor according to claim 1, wherein A first groove (9) is formed on the stator fixing device (4), and the first groove (9) is used for fixing the stator conductor (2); A second groove (10) is formed on the rotor stabilizing device (4).

4. The linear motor according to claim 1, characterized in that The rotor conductor and the stator conductor are independently powered.

5. The linear motor according to claim 4, wherein, When the stator conductor and the rotor conductor are energized simultaneously, the rotor conductor (7) drives the rotor device (6) to move forward, and the currents of the rotor conductor (7) and the stator conductor (2) are in the same direction; When the rotor needs to decelerate, the currents of the rotor conductor (7) and the stator conductor (2) are in opposite directions.

6. The linear motor according to claim 1, wherein The rotor stabilizing device (3) is a semi-cylinder, which is used to prevent the rotor device from moving left and right.

7. The linear motor according to claim 1, characterized in that There are grooves on both sides of the rotor device (6), and the rotor stabilizing device (3) is fixed in the grooves.

8. The linear motor according to claim 1, characterized in that, The stator isolation device (5) is a flat semi-cylinder, which is used to prevent the stator conductor (2) from generating current with other positions.

9. The linear motor according to claim 1, wherein The current is a steady current or a pulsed current.

10. The linear motor according to claim 1, wherein The current density and the generated magnetic induction intensity performance indexes of the power supply conductor (1), the stator conductor (2) and the rotor conductor (7) are the same.

Images