Induction motor transmitting device

Abstract

The embodiment of the invention provides an induction motor transmitting device. The induction motor transmitting device comprises a motor base; an opening of the U-shaped structure faces the motor base, and the U-shaped stator framework comprises two side walls and a top wall; the stator iron cores are respectively fixed on the side walls and the top wall, and the stator iron cores are provided with coil windings; and the rotor covers the outer side of the stator framework and is connected to the motor base in a sliding manner. The linear induction motor is adopted, the motor is of an inverted-U-shaped structure, the stator iron cores are arranged on the side wall and the top wall of the U-shaped structure respectively, the structure is compact, and the space utilization rate is high; the transverse end effect of the upper motor and the transverse end effect of the upper portions of the left and right sides can be eliminated, under the same current condition, the thrust of the motor of the U-shaped structure is larger than the sum of thrust of independent operation of the left, upper and right motors, the power factor is high, the motor winding directly faces air to conduct convection heat dissipation, and the heat dissipation effect is improved.

Description

Technical Field

[0001] The present application relates to the field of transmission technology, and in particular, to an induction motor transmission device. Background Art

[0002] Compared with air and steam catapults, electromagnetic catapult technology has the advantages of precise control, high catapult efficiency, and strong flexibility. It is suitable for the launch of payloads of various magnitudes and has broad application prospects in the industrial field.

[0003] Electromagnetic catapults use linear motor technology to achieve thrust output of motor movers. Currently, linear motor solutions used in electromagnetic catapults can be divided into two types: synchronous motors and induction motors. Synchronous motor movers need to have their own DC magnetic field, and the movers can use coil excitation, rare earth permanent magnets, superconducting magnets and other technical solutions. However, no matter which solution is used, the size and weight of the movers will increase, reducing the thrust-to-weight ratio of the electromagnetic catapult system. Summary of the invention

[0004] An induction motor launching device is provided in an embodiment of the present application to solve the problem of low thrust-to-weight ratio of the electromagnetic catapult system of the existing motor launching device.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] An induction motor transmitting device, comprising:

[0007] Motor base;

[0008] A U-shaped stator frame, wherein the opening of the U-shaped structure faces the motor base, and the U-shaped stator frame comprises two side walls and a top wall;

[0009] A stator core is fixed to each of the side walls and the top wall, and the stator core is provided with a coil winding;

[0010] The mover is covered on the outer side of the U-shaped stator frame and is slidably connected to the motor base.

[0011] Optionally, the stator core is detachably fixedly connected to the U-shaped stator frame.

[0012] Optionally, a first fixing hole is provided on a side wall of the stator core facing the U-shaped stator frame;

[0013] The U-shaped stator frame is provided with a second fixing installation hole, and the stator core and the U-shaped stator frame are fixed via the first fixing installation hole, the second fixing installation hole and a threaded fastener.

[0014] Optionally, a mounting protrusion is provided on the side wall of the stator core facing the U-shaped stator frame;

[0015] The U-shaped stator skeleton is provided with an installation recess, and the stator core is positioned with the U-shaped stator skeleton through the installation protrusion and the installation recess.

[0016] Optionally, the stator core includes:

[0017] A tooth pressure plate and a stator core body formed by stacking, the tooth pressure plates are respectively located on the transverse two sides of the stator core body, and the tooth pressure plates and the stator core body are detachably and fixedly connected; the stator core body is provided with the first fixed installation holes and the installation protrusions;

[0018] The tooth pressure plates and the stator core body are respectively provided with tooth-shaped grooves for installing the coil windings, and the tooth-shaped grooves penetrate through the tooth pressure plates and the stator core body transversely.

[0019] Optionally, the tooth pressure plate is uniformly provided with a plurality of first installation holes along the longitudinal direction, the stator core body is uniformly provided with a plurality of second installation holes along the longitudinal direction, and the tooth pressure plate and the stator core body are fixed through the first installation holes, the second installation holes and threaded fasteners.

[0020] Optionally, the stator core body is formed by stacking a plurality of silicon steel sheets and forms the installation protrusion.

[0021] Optionally, the stator core body includes:

[0022] A plurality of first silicon steel sheets and / or a plurality of second silicon steel sheets, one side side wall of the first silicon steel sheets and / or the second silicon steel sheets is provided with the tooth-shaped grooves;

[0023] A sub-installation protrusion is provided on one side of each of the second silicon steel sheets facing away from the tooth-shaped groove, and the sub-installation protrusions of the second silicon steel sheets are stacked to form the installation protrusion.

[0024] Optionally, the stator core body located on the side wall is formed by stacking a plurality of the first silicon steel sheets and a plurality of the second silicon steel sheets.

[0025] Optionally, the stator core body located on the top wall is formed by stacking a plurality of the second silicon steel sheets.

[0026] The induction motor emission device provided by the embodiment of the present application includes: a motor base; a U-shaped stator skeleton, the opening of the U-shaped structure faces the motor base, and the U-shaped stator skeleton includes two side walls and a top wall; a stator core, which is respectively fixed on each side wall and the top wall, and the stator core is provided with a coil winding; a rotor, which is covered outside the stator skeleton and is slidably connected to the motor base.

[0027] Adopting an induction motor launching device provided in an embodiment of the present application, compared with the prior art, it has the following technical effects:

[0028] A linear induction motor is adopted, and the motor has an inverted "U" shape structure. Stator cores are respectively arranged on the side walls and the top wall of the "U" shape structure. It has a compact structure and high space utilization rate; it can eliminate the transverse end effects of the upper motor and the upper transverse end effects on the left and right sides. Under the same current conditions, the thrust of the "U" shape structure motor is greater than the sum of the thrusts of the three motors on the left, upper, and right operating alone, with a high power factor. The motor windings directly face the air for convective heat dissipation, improving the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0030] Figure 1 is a schematic structural diagram of an induction motor launching device provided in an embodiment of the present application;

[0031] Figure 2 is a schematic structural diagram of the stator core provided in an embodiment of the present application;

[0032] Figure 3 is Figure 2 a schematic structural diagram of the second orientation of;

[0033] Figure 4 is an assembly schematic diagram of the stator core and the "U" shaped stator skeleton provided in an embodiment of the present application;

[0034] Figure 5 is a schematic structural diagram of the first silicon steel sheet provided in an embodiment of the present application;

[0035] Figure 6 is a schematic structural diagram of the second silicon steel sheet provided in an embodiment of the present application.

[0036] The reference signs in the drawings are as follows:

[0037] 1 - "U" shaped stator skeleton, 2 - motor base, 3 - mover, 4 - coil winding, 5 - stator core, 6 - tooth pressure plate, 7 - stator core body, 8 - screw, 9 - first mounting hole, 10 - first fixed mounting hole, 11 - second fixed mounting hole, 12 - mounting protrusion, 13 - first silicon steel sheet, 14 - second silicon steel sheet, 15 - tooth-shaped groove, 121 - sub-mounting protrusion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] An embodiment of the present invention discloses an induction motor launching device to solve the problem of low thrust-to-weight ratio of the electromagnetic catapult system in the existing motor launching device.

[0039] In order to make the technical solutions and advantages in the embodiments of the present application clearer and more understandable, the following further details the exemplary embodiments of the present application with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than an exhaustive list of all embodiments. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0040] Please refer to Figures 1-6 , Figure 1 , which is a schematic structural diagram of an induction motor transmitting device provided by an embodiment of the present application; Figure 2 , which is a schematic structural diagram of a stator core provided by an embodiment of the present application; Figure 3 is Figure 2 a schematic structural diagram of the second orientation of Figure 4 , which is an assembly schematic diagram of a stator core and a U-shaped stator skeleton provided by an embodiment of the present application;

[0041] Figure 5 , which is a schematic structural diagram of a first silicon steel sheet provided by an embodiment of the present application; Figure 6 , which is a schematic structural diagram of a second silicon steel sheet provided by an embodiment of the present application.

[0042] In a specific implementation manner, the induction motor transmitting device provided by the present application includes a motor base 2, a U-shaped stator skeleton 1, a stator core 5, a coil winding 4, and a rotor 3. Among them, the motor base 2 is fixed to the ground to prevent the stator from being displaced by the reaction force of the rotor 3; the opening of the U-shaped stator skeleton 1 faces the motor base 2, and the U-shaped stator skeleton 1 is fixedly connected to the motor base 2. It includes a top wall and two oppositely arranged side walls. The side walls are located on the transverse sides of the top wall and extend longitudinally. The stator core 5 is respectively fixed on the two side walls and a top wall, which is equivalent to combining three motors on the left, top, and right, with high space utilization; and compared with the independent operation of three motors, the U-shaped structure can reduce the copper wire usage of the coil winding 4 and reduce production costs. The stator core 5 is provided with a coil winding 4. Specifically, the stator core 5 is provided with tooth-shaped grooves 15, and the coil winding 4 is installed and limited through the tooth-shaped grooves 15. It can be understood that the rotor 3 is covered outside the stator skeleton after the stator core 5 is installed. The rotor 3 is slidably connected to the motor base 2 and moves longitudinally along the motor base 2; specifically, a chute is provided on the motor base 2 to limit the sliding of the rotor 3 and prevent the rotor 3 from detaching from the base. In other embodiments, other limiting methods can also be selected, which will not be elaborated here.

[0043] In this embodiment, the mover 3 can be made of a metal conductor (such as copper, aluminum, and their alloy materials), or a composite mover 3 (conductor plate + magnetic material) can be used. Eddy currents are induced inside the conductor to form a magnetic field of the mover 3 that interacts with the stator magnetic field, so that the mover 3 generates the electromagnetic force required for ejection. An alternating current is passed through the coil winding 4 to form a traveling-wave magnetic field of the stator, causing eddy currents to be induced inside the conductor of the mover 3, thereby generating an electromagnetic force.

[0044] Adopting an induction motor launching device provided in the embodiment of the present application has the following technical effects compared with the prior art:

[0045] A linear induction motor is adopted, and the motor has an inverted "U" shape. Stator cores 5 are respectively arranged on the side walls and the top wall of the "U" shape. The structure is compact and the space utilization rate is high; the lateral end effects of the upper motor and the upper lateral end effects on the left and right sides can be eliminated. Under the same current conditions, the thrust of the "U" shape motor is greater than the sum of the thrusts of the three motors on the left, upper, and right operating separately. The power factor is high, and the motor windings are directly faced to the air for convective heat dissipation, improving the heat dissipation effect.

[0046] Among them, the stator core 5 is detachably and fixedly connected to the "U" shaped stator skeleton 1, such as being fixed by a threaded fastener; specifically, the side wall of the stator core 5 facing the "U" shaped stator skeleton 1 is provided with a first fixed mounting hole 10; the "U" shaped stator skeleton 1 is provided with a second fixed mounting hole 11, and the stator core 5 and the "U" shaped stator skeleton 1 are fixed through the first fixed mounting hole 10, the second fixed mounting hole 11, and the threaded fastener. Both the first fixed mounting hole 10 and the second fixed mounting hole 11 are threaded holes, and the threaded fastener is a bolt for fixing.

[0047] In another embodiment, the side wall of the stator core 5 facing the "U" shaped stator skeleton 1 is provided with a mounting protrusion 12; the "U" shaped stator skeleton 1 is provided with a mounting recess. The stator core 5 is positioned with the "U" shaped stator skeleton 1 through the mounting protrusion 12 and the mounting recess. A force transmission surface is formed by the cooperation of the mounting protrusion 12 and the mounting recess. The mounting protrusion 12 can be set as a protrusion or a boss, and the mounting recess can be set as a groove or a hole structure, as long as the cooperation between the two can be achieved. It can be understood that the stator core 5 and the "U" shaped stator skeleton 1 can be fixed by the above-mentioned threaded fasteners, or can be fixed through the mounting protrusion 12 and the mounting recess; or a combination of the two can be used for fixing to improve the connection firmness.

[0048] In this embodiment, the stator core 5 includes:

[0049] A stator core body 7 formed by stacking a tooth pressure plate 6 and the tooth pressure plate 6 is respectively located on the transverse two sides of the stator core body 7, and the tooth pressure plate 6 and the stator core body 7 are detachably and fixedly connected; the stator core body 7 is provided with a first fixed mounting hole 10 and a mounting convex portion 12. The stator core body 7 is formed by stacking a plurality of silicon steel sheets and has the mounting convex portion 12 as described above; the tooth pressure plate 6 is located on the transverse two sides of the stator core body 7, and the tooth pressure plate 6 is uniformly provided with a plurality of first mounting holes 9 along the longitudinal direction, and the stator core body 7 is uniformly provided with a plurality of second mounting holes along the longitudinal direction. The tooth pressure plate 6 and the stator core body 7 are fixed by the first mounting holes 9, the second mounting holes and threaded fasteners; such as a screw 8, the screw 8 sequentially penetrates through the upper tooth pressure plate 6, the silicon steel sheets and the lower tooth pressure plate 6 and forms an integral body of the stator core 5 through a pre-tightening nut. Preferably, the tooth pressure plate 6 and the stator core body 7 are respectively provided with tooth-shaped grooves 15 for installing a coil winding 4, and the tooth-shaped grooves 15 penetrate through the tooth pressure plate 6 and the stator core body 7 along the transverse direction.

[0050] Specifically, the stator core body 7 includes:

[0051] A plurality of first silicon steel sheets 13 and / or a plurality of second silicon steel sheets 14, and one side side wall of the first silicon steel sheet 13 and / or the second silicon steel sheet 14 is provided with a tooth-shaped groove 15;

[0052] A sub-mounting convex portion 121 is provided on one side of each second silicon steel sheet 14 facing away from the tooth-shaped groove 15, and the sub-mounting convex portions 121 of the second silicon steel sheets 14 are stacked to form a mounting convex portion 12.

[0053] In one embodiment, the stator core body 7 located on the side wall is formed by stacking a plurality of first silicon steel sheets 13 and a plurality of second silicon steel sheets 14, and the first silicon steel sheets 13 are located at both ends of the second silicon steel sheets 14 along the transverse direction; it can be understood that the side wall of the first silicon steel sheet 13 does not have a sub-mounting convex portion 121.

[0054] In another embodiment, the stator core body 7 located on the top wall is formed by stacking a plurality of second silicon steel sheets 14, and the base core body on the top wall and the top wall can be clamped and fixed through a mounting concave portion and a mounting convex portion 12.

[0055] Its specific working principle is as follows: during the electromagnetic catapulting process, the power supply frequency of the stator satisfies that the speed of the traveling wave magnetic field of the stator is faster than the speed of the secondary, and at this time, the secondary is subjected to a propulsive force. If the constant thrust control of the linear induction motor is to be realized, the speed of the traveling wave magnetic field of the stator relative to the secondary aluminum plate remains unchanged, and the motor works in the electric state during the acceleration catapulting stage.

[0056] After the catapulting stage is over, the mover 3 can travel to the end of the stator and then break away from the base and be thrown out, or can enter the braking section of the stator to realize the braking recovery of the mover 3 through the control of the stator current.

[0057] For the braking and recovery of the mover 3, a DC current can be applied to the stator braking section to form a standing wave magnetic field. The conductor of the moving mover 3 and the stator magnetic field generate eddy current induction, and the eddy current in the conductor causes the mover 3 to be subjected to a braking force that varies with speed, and the secondary kinetic energy is converted into heat in the aluminum plate.

[0058] In addition, the braking and recovery of the mover 3 can be achieved by changing the operating state of the motor. After the ejection is completed, the three-phase current is controlled so that the speed of the stator traveling wave magnetic field is slower than the speed of the secondary. The secondary is subjected to a braking force. To achieve the constant braking force control of the linear induction motor, the speed of the stator traveling wave magnetic field relative to the secondary aluminum plate remains unchanged, and the motor operates in the generating state. When the speed of the secondary aluminum plate drops to the relative speed, to keep the speed of the stator traveling wave magnetic field relative to the secondary aluminum plate unchanged, the phase sequence of the three-phase current changes, the stator traveling wave magnetic field is in the opposite direction to the speed of the secondary aluminum plate, and the motor operates in the electromagnetic braking state.

[0059] The induction motor launching device provided by this application adopts a U-shaped structure, and the motors on the upper, left and right sides are combined to improve the space utilization rate; compared with the operation of three motors separately, the above U-shaped structure reduces the amount of winding copper wire and reduces the device cost; at the same time, adopting the U-shaped structure can eliminate the lateral end effect of the upper motor and the upper lateral end effect of the left and right sides. Under the same current condition, the thrust of the U-shaped structure motor is greater than the sum of the thrusts of the three motors on the left, upper and right operating separately. The coil winding 4 directly faces the air for convective heat dissipation, improving the heat dissipation effect; the ineffective section winding of the stator directly faces the air, and the leakage reactance of the ineffective section is low, which is beneficial to improving the power factor of the linear motor.

[0060] Although the preferred embodiments of this application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be interpreted to include the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0061] Obviously, those skilled in the art can make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to include these changes and modifications.

Claims

1. An induction motor emission device, characterized in that, Comprising: Motor base; U-shaped stator skeleton, the opening of the U-shaped structure facing the motor base, the U-shaped stator skeleton including two side walls and a top wall; Stator core, fixed to each of the side walls and the top wall respectively, and the stator core is provided with a coil winding; Rotor, covering the outside of the U-shaped stator skeleton and slidably connected to the motor base.

2. The induction motor transmitting device according to claim 1, characterized in that, The stator core is detachably and fixedly connected to the U-shaped stator skeleton.

3. The induction motor transmitting device according to claim 2, wherein The side wall of the stator core facing the U-shaped stator skeleton is provided with a first fixed mounting hole; The U-shaped stator skeleton is provided with a second fixed mounting hole, and the stator core and the U-shaped stator skeleton are fixed by the first fixed mounting hole, the second fixed mounting hole and a threaded fastener.

4. The induction motor transmitting device according to claim 3, characterized in that The side wall of the stator core facing the U-shaped stator skeleton is provided with a mounting protrusion; The U-shaped stator skeleton is provided with a mounting recess, and the stator core is positioned with the U-shaped stator skeleton through the mounting protrusion and the mounting recess.

5. The induction motor transmitting device according to claim 3, characterized in that, The stator core includes: Tooth pressure plate and stator core body formed by stacking, the tooth pressure plates are respectively located on the transverse two sides of the stator core body, and the tooth pressure plate and the stator core body are detachably and fixedly connected; the first fixed mounting hole and the mounting protrusion are provided on the stator core body; The tooth pressure plate and the stator core body are respectively provided with tooth-shaped grooves for mounting the coil winding, and the tooth-shaped grooves penetrate the tooth pressure plate and the stator core body transversely.

6. The induction motor transmitting device according to claim 5, wherein A plurality of first mounting holes are uniformly provided on the tooth pressure plate longitudinally, and a plurality of second mounting holes are uniformly provided on the stator core body longitudinally, and the tooth pressure plate and the stator core body are fixed by the first mounting holes, the second mounting holes and a threaded fastener.

7. The induction motor transmitting device according to claim 6, characterized in that, The stator core body is formed by stacking a plurality of silicon steel sheets and forms the mounting protrusion.

8. The induction motor transmitting device according to claim 7, characterized in that, The stator core body includes: A plurality of first silicon steel sheets and / or a plurality of second silicon steel sheets, and the tooth-shaped grooves are provided on one side wall of the first silicon steel sheet and / or the second silicon steel sheet; Sub-mounting protrusions are provided on the side of each of the second silicon steel sheets facing away from the tooth-shaped groove, and the sub-mounting protrusions of each of the second silicon steel sheets are stacked to form the mounting protrusion.

9. The induction motor transmitting device according to claim 8, characterized in that, The stator core body located on the side wall is formed by stacking a plurality of the first silicon steel sheets and a plurality of the second silicon steel sheets.

10. The induction motor transmitting device according to claim 9, characterized in that, The stator core body located on the top wall is formed by stacking a plurality of the second silicon steel sheets.

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