Linear motor, driving device and train

Abstract

The application belongs to the field of linear motor structure design, and provides a linear motor, a driving device and a train. The linear motor comprises a core and a heating coil wound on the core. The middle region of the core is closed to form a forced ventilation air duct. The forced ventilation air duct is connected with a ventilator through a fan air duct. A support plate is arranged in the forced ventilation air duct. The support plate is provided with an opening for guiding the airflow on both sides of the middle region of the forced ventilation air duct. The design increases the forced ventilation air cooling structure, can greatly improve the air cooling effect of the heating coil of the motor, improve the temperature rise overrun margin, reduce the heating failure of the linear motor, and improve the operation safety and reliability of the linear motor.

Description

Technical Field

[0001] This invention belongs to the field of linear motor structure design, and particularly relates to a linear motor, drive equipment, and train. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] A linear motor is a transmission device that directly converts electrical energy into linear motion mechanical energy without any intermediate conversion mechanism. A linear motor can be viewed as a rotary motor cut radially and unfolded into a plane. The typical configuration of a linear motor coil is three-phase, with brushless commutation achieved using Hall effect elements. The working principle of a linear motor is as follows: when three-phase current is applied, a magnetic field is generated in the air gap. Ignoring end effects, the magnetic field has a sinusoidal distribution in the linear direction; however, this magnetic field is translated rather than rotated, hence it is called a traveling wave magnetic field. The traveling wave magnetic field cuts the secondary conductor, inducing an electromotive force and generating a current; the current interacts with the air gap magnetic field to generate an electromagnetic thrust, causing the primary conductor to move linearly under the action of this thrust.

[0004] Linear motors are prone to failure due to overheating of the coils, which can lead to insulation burnout. Reasons for high coil temperature include short track spacing, numerous curves and slopes, and frequent traction and braking operations, all of which significantly increase the motor's workload, causing the coils to overheat and burn out, potentially affecting the motor's reliability and lifespan. Summary of the Invention

[0005] To address the technical problems existing in the background art, the present invention provides a linear motor, a drive device, and a train, which incorporates a forced ventilation cooling structure, thereby significantly improving the cooling effect of the motor's heating coil, increasing the temperature rise margin, reducing linear motor overheating failures, and enhancing the operational safety and reliability of the linear motor.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The first aspect of the present invention provides a linear motor, including an iron core and a heating coil wound on the iron core, characterized in that the middle region of the iron core is closed to form a forced ventilation duct, and support plates are respectively provided on both sides of the forced ventilation duct; each support plate is provided with a plurality of first ventilation holes, the first ventilation holes being used to guide the airflow in the middle region of the forced ventilation duct to flow to both sides.

[0008] In one implementation, a support plate is provided on each side of the forced ventilation duct.

[0009] The technical scheme has the advantages that the support hole plate is used to balance and uniformly distribute air volume, and the strength of the iron core is increased.

[0010] As an implementation form, a second ventilation hole is formed in the side wall of the iron core.

[0011] As an implementation form, the second ventilation hole has an inclination angle of 45 degrees, so that the cooling air is directly blown onto the heating coil.

[0012] The technical scheme has the advantages that the second ventilation hole with the inclination angle of 45 degrees has a more significant cooling effect than other inclination angles.

[0013] As an implementation form, the first ventilation hole has a set inclination.

[0014] As an implementation form, the first ventilation hole has an inclination angle of 45 degrees.

[0015] As an implementation form, the forced ventilation air duct is connected with the fan air duct.

[0016] As an implementation form, the fan air duct is connected with the ventilator.

[0017] The second aspect of the application provides a driving device comprising the linear motor as described above.

[0018] The third aspect of the application provides a train comprising the driving device as described above.

[0019] Compared with the prior art, the application has the following advantages:

[0020] (1) The application increases the forced ventilation air duct in the middle of the iron core of the linear motor, does not change other installation and fixing structures, has small changes in the structure of the motor, keeps the interface of the linear motor of the application consistent with the interface of the conventional natural air cooling linear motor, and sets the support plate in the forced ventilation air duct, and sets the opening on the support plate for guiding the air flow on both sides of the middle region of the forced ventilation air duct.

[0021] (2) The application forms the ventilation hole in the side wall of the iron core, and the inclination angle of the ventilation hole is 45 degrees, so that the cooling air is directly blown onto the heating coil, and finally significantly improves the air cooling effect of the linear motor, stabilizes the overall temperature rise of the motor coil, and has a large safety margin.

[0022] The advantages of the additional aspects of the application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which form a part of this specification, are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification. The embodiments of the application, and their

[0024] Figure 1 is a conventional linear motor structure;

[0025] Figure 2 is a linear motor structure of the embodiment of the application;

[0026] Figure 3 is a forced ventilation air duct and ventilator connecting structure of the embodiment of the application;

[0027] Figure 4 is a support plate structure in the forced ventilation air duct of the embodiment of the application;

[0028] Figure 5 is an iron core side wall structure of the embodiment of the application.

[0029] Wherein, 1 is a heating coil; 2 is an iron core; 3 is a forced ventilation air duct; 4 is an air inlet; 5 is a ventilator; 6 is a ventilator air duct; 7 is a support plate; 8 is a second ventilation hole; 9 is a barrier remover. DETAILED DESCRIPTION

[0030] The application will be further described below in conjunction with the drawings and embodiments.

[0031] It should be noted that the following detailed description is illustrative only, and is intended to provide further description of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0033] Embodiment One

[0034] Figure 1 A conventional linear motor structure is given, wherein 1 is a heating coil, and 2 is an iron core. The iron core 2 plays a fixing role for the motor coil and is installed and connected with a train bogie. 9 is a barrier remover, which removes the sundries on the train line and protects the coil insulation layer.

[0035] It should be noted that the heating coil 1, the core 2 and the obstacle remover 9 are all existing structures, and those skilled in the art can select the corresponding structure according to the actual situation, which will not be described in detail here.

[0036] With reference to Figure 2 , Figure 3 and Figure 4 , the embodiment provides a linear motor, which comprises a core 2 and a heating coil 1 wound on the core 2, and the middle region of the core 2 is closed to form a forced ventilation air duct 3, and a support plate 7 is arranged on each side of the forced ventilation air duct 3; a plurality of first ventilation holes are formed on each support plate 7, and the first ventilation holes are used to guide the wind flowing to both sides of the middle region of the forced ventilation air duct 3.

[0037] According to Figure 4 , one support plate 7 is arranged on each side of the forced ventilation air duct 3 in the embodiment. The support hole plate is used for balancing and uniformly distributing the air volume, and also for increasing the strength of the core.

[0038] In the specific implementation process, the first ventilation hole has a set inclination.

[0039] As a preferred solution, the inclination angle of the first ventilation hole is 45 degrees.

[0040] Among them, the second ventilation hole with an inclination angle of 45 degrees has a more significant cooling effect than other inclination angles.

[0041] It can be understood here that in other embodiments, those skilled in the art can set the inclination angle of the first ventilation hole according to the actual situation, which will not be described in detail here.

[0042] According to Figure 3 , the forced ventilation air duct 3 of the embodiment is connected with a fan air duct, and the air inlet 4 of the fan air duct is connected with a ventilator 5. The ventilator 5 is arranged outside the linear motor.

[0043] As shown in Figure 5 , the side wall of the core 2 of the embodiment is provided with a second ventilation hole 8.

[0044] In the embodiment, the inclination angle of the second ventilation hole 8 is 45 degrees, so that the cooling air directly blows on the heating coil. Among them, the second ventilation hole with an inclination angle of 45 degrees has a more significant cooling effect than other inclination angles.

[0045] It can be understood here that in other embodiments, those skilled in the art can set the inclination angle of the second ventilation hole 8 according to the actual situation, which will not be described in detail here.

[0046] Embodiment two

[0047] The embodiment provides a driving device, which comprises the linear motor as described above.

[0048] It should be noted that, in the embodiment, the driving device can be implemented by using the existing structure except the linear motor, and details are not described herein.

[0049] Embodiment three

[0050] The embodiment provides a train, which comprises the driving device as described above.

[0051] It should be noted that, in the embodiment, the train can be implemented by using the existing structure except the driving device, and details are not described herein.

[0052] The above merely provides preferred embodiments of the present application but not for limiting the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A linear motor, comprising an iron core and a heating coil wound around the iron core, characterized in that, The middle area of ​​the iron core is closed to form a forced ventilation duct, and support plates are respectively provided on both sides of the forced ventilation duct; each support plate is provided with a number of first ventilation holes, which are used to guide the airflow in the middle area of ​​the forced ventilation duct to flow to both sides; each side of the forced ventilation duct is provided with a support plate; and second ventilation holes are provided on the side wall of the iron core. The first ventilation hole has a set tilt angle.

2. The linear motor as described in claim 1, characterized in that, The second ventilation hole is tilted at 45 degrees so that the cooling air blows directly onto the heating coil.

3. The linear motor as described in claim 1, characterized in that, The first ventilation hole has an inclination angle of 45 degrees.

4. The linear motor as described in claim 1, characterized in that, The forced ventilation duct is connected to the fan duct.

5. The linear motor as described in claim 4, characterized in that, The fan duct is connected to the ventilation fan.

6. A driving device, characterized in that, Includes the linear motor as described in any one of claims 1-5.

7. A train, characterized in that, Includes the drive device as described in claim 6.

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