JP2016525866A - Secondary device of grid-like linear motor for linear motor rail traffic - Google Patents

Abstract

The present invention relates to a secondary device for a linear linear motor for linear motor rail traffic, comprising a magnetically conductive core (5), a conductor (6), and a mounting frame (7). , Including a pair of conductive rods (61) arranged in a grid and a conductive end rod (62) connecting the ends of the adjacent conductive rods (61), and the conductive iron core (5) is connected to the conductive rod. Corresponding mounting grooves (51) are provided, the conductive rods (61) are fitted into the mounting grooves (51), and the two ends of the conductive rods (61) both extend from the mounting grooves (51). The present invention relates to a secondary device for a grid-shaped linear motor for linear motor rail traffic in which an end bar (62) is provided on a side portion of a magnetic iron core (5) and a magnetic iron core (5) is provided on a mounting frame (7). . The magnetic iron core (5) is punched and laminated from the silicon steel plate, and the silicon steel plate is laminated along the longitudinal direction of the conductive rod (61). The conductive rod (61) and the conductive end rod (62) are made of a material having good conductive performance. The secondary of the linear motor adopts a whole new structure and uses materials with good conductive performance and magnetic conductivity performance, effectively reducing the eddy current loss in the secondary induction plate, and the traction force of the motor And an excellent energy saving effect can be obtained. [Selection] Figure 3

Description

  The present invention relates to a secondary device for a grid-like linear motor for linear motor rail traffic applied to linear motor rail traffic, and more particularly, to a grid-like linear motor for linear motor rail traffic applied to linear motor rail traffic on a subway. The secondary device.

  Linear motor wheel rail trains are safe, quick, comfortable, economical, energy-saving and are one of the important components of future city wheel rail traffic. It is an inevitable outcome for the start. In terms of the operation of the entire system, the linear motor wheel rail traffic is not low in practical operation efficiency because there is no problem such as deceleration due to gears and idling. According to practical operational data, the linear motor subway can save about 12% energy than a conventional subway with resistance braking. At the same time, steel materials can be saved by 15% or more.

  However, in linear motor wheel rail traffic, linear motors have lower efficiency and power factor than conventional rotary motors due to the large air gap between the primary and secondary of the linear motor and the problems of the unique end effect. The start of the wheel rail train is limited to some extent. As linear motor transmission technology matures day by day, how to further reduce the energy consumption of linear motors is already an important issue that must be emphasized in linear motor wheel rail traffic.

  The energy consumption of the linear motor is primarily due to the fact that the required excitation current is large and the loss increases because the air gap between the primary and secondary of the linear motor is larger than the air gap of the rotary motor. Secondly, both ends of the primary core of the linear motor are bent, an end effect is generated, waveform distortion and the like are caused, the operation performance of the linear motor is affected, and the loss increases.

  Therefore, how to reduce the energy consumption of the linear motor has become a problem that has been studied with increasing attention. Speaking of the linear motor itself, energy consumption is mainly in its primary and secondary structures and materials. From the viewpoint of the prior art, the primary structure and materials of the linear motor are already relatively perfectly designed, so the design and selection of the secondary structure and material of the linear motor are currently being researched and tested at home and abroad. It is important.

  At present, most of linear motors for linear motor wheel rail traffic adopt a 20-25mm conductive iron plate as a secondary, and a 5-7mm conductive aluminum plate is compounded by a combination process of explosion welding. Combined with a composite secondary called a somatic guide plate. FIG. 1 is a schematic diagram showing a secondary of the integrated guide plate. As shown in FIG. 1, the secondary of the integrated induction plate includes a conductive aluminum plate 1 (bulk shape) and a magnetic conductive steel plate 2 (bulk shape), and the conductive aluminum plate 1 is a magnetic conductive steel plate 2. Is compounded on the surface. Such a secondary structure linear motor is operating, has a large eddy current loss and low efficiency.

  In recent years, another secondary structure of a linear motor called a laminated induction plate as shown in FIG. 2 has been developed. As a secondary of such a laminated induction plate, a conductive aluminum plate 3 (bulk shape) and a conductive steel plate 4 (laminated shape shape) stacked with a few square steel plates are provided, and the conductive aluminum plate 3 is combined with the surface of the magnetically conductive steel plate 4 in the same manner as shown in FIG. When such a secondary structure linear motor is operating, the eddy current loss is smaller than the secondary structure of the integrated induction plate, and the efficiency is improved.

  According to the test results of the performance comparison between the secondary laminated guide plate structure and the integrated guide plate structure of the above linear motor, in the case of the same current and the same primary and secondary air gap, the laminated guide plate Is larger than the thrust of the integrated guide plate, and the thrust increases as the number of laps increases, improving the efficiency of the linear motor. Regarding the laminated induction plate and the integrated induction plate of the same standard, the linear motor using the laminated induction plate has a theoretically 10% larger thrust than the linear motor using the integrated induction plate, and the energy consumption is 10%. Saves about%. That is, when the primary and secondary induction plates of the linear motor interact with each other, eddy currents are generated in the conductive steel plate of the induction plate, and the conductive steel plate of the integrated induction plate is a bulk back iron and eddy current loss. However, this is because the magnetically conductive steel plate of the laminated induction plate is made up of a few pieces of square steel and the eddy current loss is relatively small.

  Although the secondary of the laminated induction plate has improved the efficiency of the linear motor over the secondary of the integral induction plate, the change is still insufficient in terms of the secondary structure and materials of the linear motor. The secondary of the laminated induction plate changes the eddy current loss of the secondary magnetic plate of the integrated induction plate from a part of the structure, and since the magnetic conductive material still adopts ordinary steel, its secondary The structure and material of the conductive plate are not changed, and there is still room for further improvement in reducing the secondary energy consumption. In order to obtain a better energy saving effect, the present invention is further devised to launch a new innovation with the secondary overall structure and material itself of the linear motor.

  An object of the present invention is to provide a secondary device for a grid-like linear motor for linear motor rail traffic with higher efficiency, which improves the thrust and operation efficiency of conventional linear motor rail traffic.

  The present invention relates to a secondary device of a linear motor for a linear motor rail for linear motor rails comprising a magnetic iron core, a conductor, and a mounting frame. The conductor is a set of conductive bars arranged in a grid. And a conductive end bar connecting the ends of the adjacent conductive bars, the magnetic conductive core is provided with a mounting groove corresponding to the conductive bar, the conductive bar is fitted into the mounting groove, A secondary device for a grid-like linear motor for linear motor rail traffic in which two end portions all extend from the mounting groove, a conductive end bar is provided on the side of the magnetic core, and the magnetic core is provided on the mounting frame It is realized by providing.

  Furthermore, the magnetically conductive iron core has a flat plate shape.

  Furthermore, the magnetic conductive iron core is formed by punching out from the silicon steel plate, and the silicon steel plate is laminated along the longitudinal direction of the conductive rod.

  Further, the mounting frame fixes the magnetic iron core with a fastener.

  Further, a slight position limiting portion is provided on the upper portion of the mounting frame so as to be positioned between adjacent conductive bars.

  Furthermore, a mounting plate for laying and mounting is projected on the outer surface of the mounting frame, and a mounting hole is provided in the mounting plate.

  Furthermore, the conductive bar and the conductive end bar are integrally connected.

  Furthermore, the conductive bar and the conductive end bar are made of a material having good conductive performance.

  Further, the material of the conductive bar and the conductive end bar is a fine copper material.

  Furthermore, the cross-sectional area of the conductive end bar is larger than the cross-sectional area of the conductive bar.

  Compared with the prior art, the secondary device of the grid linear motor according to the present invention is completely different from the secondary device of the laminated induction plate and the secondary device of the integrated induction plate in the overall structure. The structural design of the present invention is more consistent with the operating principle of the linear motor, and can further embody the dominance and characteristics of the linear motor. The induction plate secondary device of the conventional linear motor employs almost a bulk metal plate or a composite metal plate, and since there is no obvious conductive rod, the induced current in the induction plate is not clearly guided compared to the present invention, In addition, the current distribution in the conductive aluminum plate is disturbed, the eddy current loss is large, and the efficiency is low. Next, the material is completely different from the conventional secondary device of the laminated induction plate and the secondary device of the integrated induction plate. The conventional induction plate is composed of a conductive aluminum plate and a magnetically conductive steel plate, but the grid-like induction plate material of the present invention is a fine copper material having a good electrical conductivity and a silicon steel plate having a good magnetic performance. Performance, less energy loss, and higher efficiency. Further, the traction force of the linear motor can be improved by increasing the thickness of the primary magnetic core without changing the thickness of the secondary magnetic core.

It is a schematic diagram of the structure of the secondary apparatus of an integrated guide plate. It is a schematic diagram of the structure of the secondary apparatus of a laminated | stacked induction | guidance | derivation board. 1 is a schematic diagram of the structure of a preferred embodiment of the present invention. FIG. 4 is a schematic diagram of an induced current distribution in the conductor shown in FIG. 3. It is a schematic diagram of the induced current circuit of FIG.

  In order to clarify the technical problems, technical solutions and advantages to be solved by the present invention, the present invention will be described in more detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only for the purpose of interpreting the invention and are not intended to limit the invention.

  Please refer to FIG. 3, which shows a preferred embodiment of the present invention. The secondary device of the linear motor for the linear motor rail traffic of this embodiment includes a magnetic iron core 5, a conductor 6, and an attachment frame 7. The magnetic iron core 5 has a flat plate shape, the conductor 6 is provided in the magnetic iron core 5, and the magnetic iron core 5 is provided in the mounting frame 7.

  The conductor 6 includes a set of conductive rods 61 arranged in a grid and conductive end rods 62 that connect the ends of the adjacent conductive rods 61. The conductive bar 61 and the conductive end bar 62 are integrally connected, have a grid shape, have a plurality of closed circuits, and the secondary induced current of the linear motor is a circuit according to the design requirements in the secondary. The induced current distribution is more regular, the eddy current loss is small, and the efficiency is increased. The conductive end bar 62 has a cross-sectional area larger than that of the conductive bar 61. The conductive bar 61 and the conductive end bar 62 are made of a material having good conductive performance, such as, for example, fine copper, copper alloy, aluminum, or aluminum alloy. In the present embodiment, the material of the conductive rod 61 and the conductive end rod 62 is a fine copper material, the secondary internal resistance is small, the secondary energy consumption is reduced, and the secondary efficiency is further improved.

  A plurality of mounting grooves 51 corresponding to the conductive rods 61 are formed in the top surface of the magnetic iron core 5, the conductive rods 61 are fitted into the mounting grooves 51, and the two ends of the conductive rods 61 are both mounted grooves 51. A conductive end bar 62 is provided on the side of the magnetic iron core 5. The magnetic iron core 5 is formed by punching from a silicon steel plate with good magnetic conductivity, and the silicon steel plate is laminated along the longitudinal direction of the conductive rod 61, and preferably has a thickness of 0.5 mm. If a silicon steel plate with good magnetic performance is adopted as the magnetic iron core 5, the secondary energy consumption can be further reduced and the secondary efficiency can be improved. The shape and number of the mounting grooves 51 are determined according to the design requirements for the primary of the linear motor. The mounting groove 51 is used to fix the conductive rod 61 and communicates with the primary and secondary magnetic circuits of the linear motor.

  The conductive rod 61 is fitted into the mounting groove 51 so as to extend to both ends of the mounting groove 51, and the top surface thereof is not higher than the top surface of the magnetic conductive core 5. The conductive end rods 62 are respectively provided on both sides of the magnetic iron core 5, and the conductive end rods 62 on one side connect the ends of the respective conductive rods 61 on this side. The conductor 6 has a grid shape.

  The mounting frame 7 is provided on each of the two side surfaces of the magnetic iron core 5, and the magnetic iron core 5 is fixed by a fastener 8. In this embodiment, the fastener 8 is connected by a bould and a nut. Each of the three boulds penetrates the magnetic iron core 5 and is tightened with a nut at the other end of the magnetic iron core 5. The mounting frame 7 is used for laying, mounting and fixing. A mounting plate 71 for laying and mounting is projected on the outer surface of the mounting frame 7, and a mounting hole 72 that contributes to mounting is provided in the mounting plate 71. On the upper portion of the mounting frame 7, a slight position limiting portion 73 for fixing the magnetic conductive core 5 and limiting the mounting position of the conductive bar 61 is provided so as to be positioned between the adjacent conductive bars 61.

  In practical use, the primary motor of the linear motor is provided in the bogie of the rail train. However, the secondary device of the linear motor for the linear motor rail traffic of the present invention corresponds to the primary motor of the linear motor along the rail. In this way, it is laid on the base of railroad boards or sleepers.

  When a three-phase symmetric sine wave current flows in the primary three-phase winding of the linear induction motor, an air gap magnetic field is generated in the air gap between the primary and secondary after interacting with each other. Without considering the vertical end effect caused by bending both ends of the magnetic iron core 5, the air gap magnetic field distribution is considered to be distributed in a sinusoidal shape along the extended linear direction. Also good. When the three-phase current changes with time, the air gap magnetic field moves along a linear according to the phase order of A, B, C. Since this magnetic field moves in parallel, it is called a traveling wave magnetic field. When the secondary has a grid shape, the secondary conductor rod is cut by the traveling wave magnetic field to induce an electromotive force to generate an induced current. The current of the conductive rod 61 and the air gap magnetic field act on each other to generate electromagnetic thrust. If the secondary is fixed without moving by the action of the electromagnetic thrust, the primary moves along the train and linearly moves along the direction of motion of the traveling wave magnetic field.

Please refer to FIGS. 4 and 5 together. 4 and 5 show hypothetical induced magnetic fields and induced currents in the conductor 6, and distributions of induced currents in the conductor 6, respectively. In the figure, l _δ is the overlapping thickness of the primary magnetic core, c is the width extended from the primary core in the longitudinal direction of the secondary l _δ used as the end passage of the secondary induced current, The magnitude affects the secondary resistance. In the present invention, a conductive end bar 62 is specially provided in the end passage of the secondary induced current. Since the cross-sectional area of the conductive end bar 62 is larger than the cross-sectional area of the conductive bar 61, the consumption of the secondary induced current at the conductive end bar 62 is reduced. Since a fine copper material having good conductive performance is used as the conductive end bar 62, the secondary resistance is further reduced and the efficiency is improved. The conductor 6 can reduce the loss of the induced eddy current, make the secondary magnetic circuit more rational, increase the magnetic flux of the magnetic conductive core 5, and improve the secondary efficiency.

On the other hand, since the conductive end rod 62 dedicated to the end passage is provided, the length of l _δ is relatively large, and the thickness of the primary magnetic core (not shown) is equal to that of the secondary magnetic core 5. The thickness completely overlaps with the thickness, and the thickness of the secondary magnetic iron core 5 can be used more effectively. It is possible to increase the traction force of the linear motor by increasing the thickness of the primary magnetic core without changing the thickness of the secondary magnetic core 5.

  The linear motor in which the secondary device of the linear motor for the linear motor rail traffic of this embodiment employs the grid-shaped conductor induction plate has a theoretically 10 thrust more than the linear motor in which the laminated induction plate is adopted. The energy consumption is reduced by about 10%.

  The above are only preferred embodiments of the present invention and are not intended to limit the present invention, and all changes, equivalent replacements and improvements made in the spirit and principle of the present invention are included in the protection scope of the present invention. Should be.

Claims (10)

  In a secondary device of a grid-like linear motor for linear motor rail traffic comprising a magnetic iron core, a conductor, and a mounting frame, the conductor is adjacent to a set of conductor bars arranged in a grid. A conductive end bar for connecting the end of the conductive rod to be mounted, and a mounting groove corresponding to the conductive bar is provided in the magnetic iron core, and the conductive bar is fitted into the mounting groove. A linear motor rail traffic grid characterized in that one end portion extends from a mounting groove, the conductive end bar is provided on a side portion of a magnetic core, and the magnetic core is provided on a mounting frame. -Shaped linear motor secondary device.   2. The secondary device for a linear motor for a linear motor rail traffic according to claim 1, wherein the magnetic iron core has a flat plate shape.   3. The linear motor rail transportation according to claim 2, wherein the magnetic iron core is formed by being punched and laminated from a silicon steel plate, and the silicon steel plate is laminated along a longitudinal direction of the conductive rod. Secondary device for grid-shaped linear motor.   The secondary device of the linear motor for grid motor linear traffic according to claim 3, wherein the mounting frame fixes the magnetic iron core with a fastener.   5. The grid-like linear motor for linear motor rail traffic according to claim 4, wherein a slight position limiting portion is provided between the adjacent conductive rods at an upper portion of the mounting frame. Next device.   2. The grid-like linear motor for linear motor rail traffic according to claim 1, wherein a mounting plate for laying and mounting is provided on an outer surface of the mounting frame, and a mounting hole is provided in the mounting plate. Secondary device.   The secondary device of a grid-like linear motor for linear motor rail traffic according to claim 1, wherein the conductive bar and the conductive end bar are integrally connected.   The secondary device of a grid-like linear motor for linear motor rail traffic according to claim 7, wherein the conductive rod and the conductive end rod are made of a material having good conductive performance.   The secondary device of the linear motor for linear motor rail traffic according to claim 8, wherein the material of the conductive rod and the conductive end rod is a copper material.   The secondary device of a grid-like linear motor for linear motor rail traffic according to claim 1, wherein the cross-sectional area of the conductive end bar is larger than the cross-sectional area of the conductive bar.

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