WO2015013884A1 - Grid-shaped linear motor secondary device for linear motor rail transit - Google Patents

Grid-shaped linear motor secondary device for linear motor rail transit Download PDF

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Publication number
WO2015013884A1
WO2015013884A1 PCT/CN2013/080417 CN2013080417W WO2015013884A1 WO 2015013884 A1 WO2015013884 A1 WO 2015013884A1 CN 2013080417 W CN2013080417 W CN 2013080417W WO 2015013884 A1 WO2015013884 A1 WO 2015013884A1
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Prior art keywords
linear motor
conductive
secondary device
rail transit
mounting
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PCT/CN2013/080417
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French (fr)
Chinese (zh)
Inventor
叶云岳
卢琴芬
张高圣
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山东红帆能源科技有限公司
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Priority to PCT/CN2013/080417 priority Critical patent/WO2015013884A1/en
Priority to JP2016530294A priority patent/JP2016525866A/en
Publication of WO2015013884A1 publication Critical patent/WO2015013884A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L13/00—Electric propulsion for monorail vehicles, suspension vehicles or rack railways; Magnetic suspension or levitation for vehicles
    • B60L13/03—Electric propulsion by linear motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/002—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of propulsion for monorail vehicles, suspension vehicles or rack railways; for control of magnetic suspension or levitation for vehicles for propulsion purposes
    • B60L15/005—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of propulsion for monorail vehicles, suspension vehicles or rack railways; for control of magnetic suspension or levitation for vehicles for propulsion purposes for control of propulsion for vehicles propelled by linear motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors
    • H02K41/025—Asynchronous motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/26—Rail vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • the invention relates to a grid linear motor secondary device for linear motor rail transit, and the grid linear motor secondary device is suitable for linear motor rail transit, and is particularly suitable for metro linear motor rail transit.
  • linear motor wheel-rail train has the advantages of safety, speed, comfort, economy and energy saving. It is an important part of the future urban rail-rail transportation and an inevitable trend of the development of modern urban wheel-rail transportation. Linear motor wheel and rail traffic from the entire system operation, because there is no gear reduction, there is no problem such as slipping, the actual operating efficiency is not low.
  • the actual operational measured data is: linear motor metro is more energy efficient than traditional metro with resistance braking. 12%. At the same time, it can save more than 15% of steel.
  • the above-mentioned linear motor energy consumption is due to the fact that the air gap between the primary and secondary of the linear motor is larger than that of the rotating electrical machine, so the required excitation current is large and the loss is increased.
  • the primary core of the linear motor is two. The end breaks, causing edge effects, causing waveform distortion, etc., affecting the running performance of the linear motor, resulting in increased losses.
  • the linear motor secondary used for most linear motor wheel and rail traffic is 20-25mm.
  • the conductive magnet plate is combined with the explosive welding process to form a composite secondary with a 5-7 mm conductive aluminum plate, which is called a monolithic induction plate.
  • the schematic diagram of the secondary of the integrated induction plate includes a conductive aluminum plate 1 (integral shape) and a magnetic conductive plate 2 (integral shape), and the conductive aluminum plate 1 is composited on the surface of the magnetic conductive plate 2.
  • Secondary structure The linear motor has large eddy current loss and low efficiency during operation.
  • the laminated inductor board includes a conductive aluminum plate 3 (integral shape) and a magnetic conductive plate 4 (laminated shape).
  • the magnetic conductive plate 4 is formed by stacking several square steels, and the conductive aluminum plate 3 is unchanged. 1 It is composited on the surface of the magnetic conductive steel plate 4.
  • the linear motor of this secondary structure has less eddy current loss during operation than the secondary structure of the integrated induction plate, and the efficiency is improved.
  • the thrust ratio of the laminated type induction board is the integral type under the same current and the same primary and secondary air gaps.
  • the thrust of the induction plate is large, and the number of laminations of the laminated induction plate is increased, the thrust is increased, and the laminated induction plate improves the efficiency of the linear motor.
  • the linear motor thrust using the laminated sensor board is theoretically increased compared to the linear motor thrust using the integral sensor board.
  • energy consumption is about 10%. This is because the magnetic motor of the induction plate is used when the primary and secondary induction plates of the linear motor interact.
  • the magnetically conductive steel plate of the integral induction plate is a monolithic back iron, and the eddy current loss is large, and the magnetic conductive steel plate of the laminated induction plate is composed of a plurality of square steel laminations, and the eddy current loss is small.
  • the laminated sensor board secondary improves the efficiency of the linear motor than the integral sensor board secondary, the change is still not enough from the structure and material of the linear motor secondary.
  • the sub-layer of the laminated sensor board only changes the eddy current loss of the secondary magnetic plate of the integrated induction plate from a partial structure, and the magnetic conductive material still uses ordinary steel; and the structure and material of the secondary conductive plate remain unchanged. , reducing the secondary energy consumption and there is more room for improvement.
  • the invention is to make a breakthrough in the overall structure and material of the linear motor secondary to achieve better energy saving effect.
  • the object of the present invention is to provide a more efficient secondary device for a linear motor for linear motor rail transit, which improves the thrust and operating efficiency of the existing linear motor rail transit.
  • the present invention is achieved by providing a secondary device for a linear motor for linear motor rail transit, comprising a magnetic core, an electrical conductor and a mounting bracket, the electric conductor comprising a set of conductive strips arranged in a grid and connecting adjacent a conductive strip at the end of the conductive strip; a mounting slot adapted to the conductive strip is disposed on the core of the conductive core, the conductive strip is embedded in the mounting slot, and both ends of the conductive strip extend out of the mounting slot
  • the conductive end strip is disposed on a side of the magnetic core; the magnetic core is disposed on the mounting bracket.
  • the magnetic conductive core is in the form of a flat plate.
  • the conductive core is formed by laminating silicon steel sheets, and the silicon steel sheets are laminated along the length of the conductive bars.
  • the mounting bracket secures the core of the magnet through the fastener.
  • a plurality of limiting strips are disposed on the upper portion of the mounting bracket, and the limiting strips are disposed between the adjacent conductive strips.
  • a mounting plate for laying and mounting is protruded on an outer side surface of the mounting bracket, and a mounting hole is provided on the mounting plate.
  • the conductive bars and the conductive strips are integrally connected.
  • the conductive strips and the conductive end strips are made of a material having good electrical conductivity.
  • the material of the conductive bar and the conductive end strip is pure copper.
  • cross-sectional area of the conductive end strip is larger than the cross-sectional area of the conductive strip.
  • the present invention provides a grid linear motor secondary device, firstly, from the overall structure and the laminated sensor board secondary device And integral induction board secondary device
  • the design of the invention is more in line with the operating principle of the linear motor, and can better reflect the advantages and characteristics of the linear motor.
  • the inductive board secondary device of the existing linear motor mostly adopts a single metal plate or a composite metal plate, and there is no obvious conductive bar, and therefore, the present invention
  • the induced current on the sensing board has no obvious guidance and the current distribution in the conductive aluminum plate is disordered, and the eddy current loss is large and the efficiency is low.
  • the material is combined with the existing laminated sensor board secondary device and the integrated sensor board secondary Device It is also completely different.
  • the existing induction plate is made of conductive aluminum plate and magnetic conductive steel plate, and the grid-shaped induction plate material of the invention is pure copper material with good electrical conductivity and silicon steel sheet with good magnetic permeability, conductivity and magnetic permeability. Can be enhanced, less power loss, and higher efficiency. Moreover, under the premise that the thickness of the secondary magnetic core is constant, the thickness of the primary magnetic core can be increased, and the traction of the linear motor can be improved.
  • Figure 1 is a schematic view showing the structure of a unitary induction board secondary device
  • FIG. 2 is a schematic structural view of a secondary device of a laminated sensor board
  • FIG. 3 is a schematic structural view of a preferred embodiment of the present invention.
  • Figure 4 is a schematic diagram showing the distribution of induced current in the conductor in Figure 3;
  • Figure 5 is a schematic diagram of the induced current loop of Figure 4.
  • the secondary device of the linear motor for linear motor rail transit of the present embodiment includes a magnetic core 5, an electric conductor 6, and a mounting bracket 7.
  • Conductor core 5 In the form of a flat plate, the conductor 6 is disposed in the core 5 and the core 5 is placed on the mounting bracket 7.
  • the electrical conductor 6 includes a plurality of grid-shaped conductive strips 61 and conductive strips 62 connecting the ends of adjacent conductive strips 61. .
  • Conductive bar 61 and conductive strip 62 The utility model is integrally connected and has a grid shape and has a plurality of closed loops, so that the induced current of the secondary of the linear motor regularly flows in the loop according to design requirements in the secondary, the distribution of the induced current is more regular, and the eddy current loss is small. ,efficient.
  • Conductive strip The cross-sectional area of 62 is larger than the cross-sectional area of the conductive bar 61.
  • the conductive strip 61 and the conductive strip 62 are made of a material having good electrical conductivity, such as pure copper, alloy copper, aluminum, and alloy aluminum. In this embodiment, the conductive strip The material of the conductive end strip 62 is pure copper, and the secondary internal resistance is small, which reduces the secondary energy consumption and further improves the secondary efficiency.
  • a plurality of mounting notches 51 corresponding to the conductive bars 61 are recessed on the top surface of the conductive core 5, and the conductive bars 61 Embedded in the mounting notch 51, both ends of the conductive bar 61 extend out of the mounting notch 51, and the conductive end strip 62 is disposed on the side of the conductive core 5.
  • Conductor core 5 The silicon steel sheet is punched and laminated by a magnetic conductive sheet having good magnetic permeability, and the silicon steel sheet is laminated along the longitudinal direction of the conductive strip 61, preferably a silicon steel sheet having a thickness of 0.5 mm.
  • Conductor core 5 The use of silicon steel sheets with good magnetic permeability can further reduce secondary energy consumption and improve secondary efficiency.
  • the shape and number of mounting slots 51 are determined by the design requirements of the linear motor relative to the primary. Mounting slot 51 It is used to fix the conductive bar 61 and can communicate with the primary and secondary magnetic circuits of the linear motor.
  • the conductive bars 61 are fitted in the mounting notches 51 and extend to the ends of the mounting notches 51, respectively, and the conductive bars 61
  • the top surface is not higher than the top surface of the magnetic conductor core 5.
  • Conductive end strips 62 are respectively disposed on both sides of the conductive core 5, and the conductive strips 62 on one side respectively place each conductive strip 61 on the side. The ends are connected together.
  • the conductor 6 has a grid shape.
  • Mounting brackets 7 are respectively placed on both sides of the magnetic core 5, and the mounting brackets 7 are fixed by the fasteners 8 .
  • the fastener 8 is a bolt and nut coupling. Three bolts are respectively passed through the core 5 and screwed to the nut at the other end of the core 5.
  • Mounting bracket 7 For laying and fixing.
  • Mounting bracket A mounting plate 71 for laying and mounting is protruded from the outer side surface of the mounting plate 71, and a mounting hole 72 for easy installation is provided on the mounting plate 71.
  • a plurality of limiting strips 73 are arranged on the upper part of the mounting bracket 7, and the limiting strips 73 It is disposed between adjacent conductive bars 61 for fixing the core 5 and limiting the mounting position of the conductive bars 61.
  • the primary of the linear motor is placed on the rail train bogie, and the present invention
  • the secondary device of the linear motor for linear motor rail transit is laid on the track plate or sleeper of the roadbed along the track and the primary of the linear motor.
  • the primary and secondary interactions create an air gap magnetic field in the air gap between them.
  • the air gap magnetic field will be A, B, C
  • the phase sequence moves in a straight line.
  • This magnetic field is translational and is therefore called a traveling wave magnetic field.
  • the secondary is a grid-shaped secondary
  • the secondary bar will induce an electromotive force and generate an induced current under the cutting magnetic field cutting.
  • Conductive bar 61 The interaction of the current and the air gap magnetic field produces an electromagnetic thrust. Under the action of this electromagnetic thrust, if the secondary is stationary, then the primary moves with the train in the direction of the traveling wave magnetic field.
  • FIG. L ⁇ is the thickness of the laminations of the primary magnetic core
  • c is the width of the primary secondary core extending in the longitudinal direction l ⁇ , it is used as an end portion of the secondary induced current path, the magnitude of the impact times C Class resistance.
  • the end passage of the secondary induced current is specifically provided with a conductive end strip 62. Since the cross-sectional area of the conductive end strip 62 is larger than the cross-sectional area of the conductive strip 61, the consumption of the secondary induced current in the conductive end strip 62 is reduced.
  • the conductive end strip 62 is made of a pure copper material with good electrical conductivity, so that the secondary resistance is further reduced and the efficiency is improved.
  • the electric conductor 6 can reduce the loss of the induced eddy current, and at the same time, makes the secondary magnetic circuit more reasonable, increases the magnetic flux of the magnetic conductive core 5, and improves the secondary efficiency.
  • the length of l ⁇ can be relatively increased, even reaching the thickness of the primary core (not shown) and the secondary core. 5
  • the thickness of the secondary magnetic core 5 is more effectively utilized at the point where the thickness is completely overlapped. Under the premise that the thickness of the secondary magnetic core 5 is constant, the thickness of the primary magnetic core can be increased to improve the traction of the linear motor.
  • the linear motor of the linear motor for the linear motor rail transit of the present embodiment adopts the grid-shaped electric conductor sensing plate, and the linear motor thrust of the linear electric induction sensor board is theoretically increased by about 10%, and the energy consumption is saved. 10% Left and right.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
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Abstract

A grid-shaped linear motor secondary device for linear motor rail transit comprises a magnetically permeable iron core (5), a conductor (6) and a mounting bracket (7). The conductor (6) comprises a group of conductive guide bars (61) arranged in a grid-shaped mode and conductive end bars (62) for connecting adjacent conductive guide bars (61); the magnetically permeable iron core (5) is provided with mounting notches (51) matched with the conductive guide bars, the conductive guide bars (61) are embedded in the mounting notches (51), two end parts of the conductive guide bars (61) extend to the outside of the mounting notches (51), and the conductive end bars (62) are disposed at the side parts of the magnetically permeable iron core (5); and the magnetically permeable iron core (5) is disposed on the mounting bracket (7). The magnetically permeable iron core (5) is made by punching and laminating silicon steel sheets, and the silicon steel sheets are laminated along the length direction of the conductive guide bars (61). The conductive guide bars (61) and the conductive end bars (62) are made of material with good conductivity. The linear motor secondary device adopts a brand new integral structure and materials with good conductivity and magnetic permeability, thereby effectively reducing the eddy-current loss in a secondary induction plate, and being capable of improving the traction force of a motor and obtaining an excellent energy saving effect.

Description

直线电机轨道交通用栅形直线电机次级装置 Grid linear motor secondary device for linear motor rail transit 技术领域Technical field
本发明涉及一种直线电机轨道交通用栅形直线电机次级装置，该种栅形直线电机次级装置适用于直线电机轨道交通，特别适用于地铁直线电机轨道交通。 The invention relates to a grid linear motor secondary device for linear motor rail transit, and the grid linear motor secondary device is suitable for linear motor rail transit, and is particularly suitable for metro linear motor rail transit.
背景技术Background technique
直线电机轮轨列车具有安全、快捷、舒适、经济以及节能等优势，是未来都市轮轨交通的一个重要组成部分，是现代化都市轮轨交通发展的必然趋势。直线电机轮轨交通从整个***运行来说，由于不用齿轮减速，也不存在打滑等问题，实际运行效率并不低。实际运营测得数据是：直线电机地铁比采用电阻制动的传统地铁节能约 12% 。同时还可节约钢材 15% 以上。 The linear motor wheel-rail train has the advantages of safety, speed, comfort, economy and energy saving. It is an important part of the future urban rail-rail transportation and an inevitable trend of the development of modern urban wheel-rail transportation. Linear motor wheel and rail traffic from the entire system operation, because there is no gear reduction, there is no problem such as slipping, the actual operating efficiency is not low. The actual operational measured data is: linear motor metro is more energy efficient than traditional metro with resistance braking. 12%. At the same time, it can save more than 15% of steel.
但是，由于直线电机轮轨交通中直线电机初级与次级之间的气隙很大以及特有的边端效应问题，其效率和功率因数较传统的旋转电机要差，在一定程度上制约了直线电机轮轨列车的发展。随着直线电机传动技术的日益成熟，如何进一步减少直线电机能耗已成为直线电机轮轨交通中需重视的一个重要问题。 However, due to the large air gap between the primary and secondary of the linear motor in the linear motor wheel-rail traffic and the unique edge effect, the efficiency and power factor are worse than those of the conventional rotating electric machine, which restricts the straight line to some extent. The development of motor wheel and rail trains. With the maturity of linear motor drive technology, how to further reduce the energy consumption of linear motors has become an important issue in linear motor-wheel-rail transportation.
上述所说的直线电机能耗，一是由于直线电机的初次级之间的气隙比旋转电机的气隙大，因此所需的励磁电流大，损耗增加；二是由于直线电机初级铁芯两端开断，产生了边端效应，引起波形畸变等，影响了直线电机的运行性能，导致损耗增加。 The above-mentioned linear motor energy consumption is due to the fact that the air gap between the primary and secondary of the linear motor is larger than that of the rotating electrical machine, so the required excitation current is large and the loss is increased. Second, the primary core of the linear motor is two. The end breaks, causing edge effects, causing waveform distortion, etc., affecting the running performance of the linear motor, resulting in increased losses.
因此，如何降低直线电机的能耗逐渐成为一个热点研究问题。从直线电机本身来说，能耗因素主要在它的初次级的结构和材料。从现有技术来看，直线电机初级的结构和材料已设计的较为完善，因此，直线电机次级的结构和材料的设计与选择就成了目前国内外研究和试验的重点。 Therefore, how to reduce the energy consumption of linear motors has gradually become a hot research issue. From the linear motor itself, the energy consumption factor is mainly in its primary and secondary structure and materials. From the point of view of the prior art, the structure and materials of the primary part of the linear motor have been designed relatively well. Therefore, the design and selection of the structure and material of the secondary motor of the linear motor have become the focus of research and experiment at home and abroad.
目前，大部分直线电机轮轨交通用的直线电机次级是采用 20-25mm 的导磁铁板，再采用***焊的结合工艺复合５－７ mm 导电铝板组成复合次级，被称为整体式感应板。如图 1 所示为 整体式感应板次级的示意图，整体式感应板次级包括导电铝板 1 （整块形状）、导磁钢板 2 （整块形状），导电铝板 1 复合在导磁钢板 2 的表面。该种次级结构的 直线电机 在运行时涡流损耗大，效率低。 At present, the linear motor secondary used for most linear motor wheel and rail traffic is 20-25mm. The conductive magnet plate is combined with the explosive welding process to form a composite secondary with a 5-7 mm conductive aluminum plate, which is called a monolithic induction plate. As shown in Figure 1 The schematic diagram of the secondary of the integrated induction plate includes a conductive aluminum plate 1 (integral shape) and a magnetic conductive plate 2 (integral shape), and the conductive aluminum plate 1 is composited on the surface of the magnetic conductive plate 2. Secondary structure The linear motor has large eddy current loss and low efficiency during operation.
近几年，也开发出另一种直线电机次级结构，如图 2 所示，该种结构被称作叠片式感应板。该种 叠片式感应板次级包括导电铝板 3 （整块形状）、导磁钢板 4 （叠片式形状），导磁钢板 4 是用若干块方钢压叠形成， 导电铝板 3 不变，像图 1 一样复合在导磁钢板 4 表面上。该种次级结构的 直线电机 在运行时涡流损耗比整体式感应板次级结构的小，效率有提高。 In recent years, another linear motor secondary structure has also been developed, as shown in Fig. 2, which is called a laminated sensor board. This species The laminated inductor board includes a conductive aluminum plate 3 (integral shape) and a magnetic conductive plate 4 (laminated shape). The magnetic conductive plate 4 is formed by stacking several square steels, and the conductive aluminum plate 3 is unchanged. 1 It is composited on the surface of the magnetic conductive steel plate 4. The linear motor of this secondary structure has less eddy current loss during operation than the secondary structure of the integrated induction plate, and the efficiency is improved.
根据上述直线电机次级的叠片式感应板结构和整体式感应板结构的性能对比测试结果来看，在相同电流以及相同初次级气隙的情况下，叠片式感应板的推力比整体式感应板的推力要大，并且叠片式感应板的叠片数量增加，推力会增加，叠片式感应板提高直线电机的效率。对于相同规格的叠片式感应板和整体式感应板，采用叠片式感应板的直线电机推力比采用整体式感应板的直线电机推力理论上要增大 10% 左右，能耗节约 10% 左右。这是因为直线电机初级与次级的感应板互相作用时，在感应板的 导磁钢板 上会产生涡流。整体式感应板的导磁钢板是整块背铁，涡流损耗大，而叠片式感应板的导磁钢板由若干块方钢叠片组成，相比涡流损耗小。 According to the performance comparison test results of the laminated induction board structure of the linear motor secondary and the integrated induction board structure, the thrust ratio of the laminated type induction board is the integral type under the same current and the same primary and secondary air gaps. The thrust of the induction plate is large, and the number of laminations of the laminated induction plate is increased, the thrust is increased, and the laminated induction plate improves the efficiency of the linear motor. For the laminated sensor board and integral sensor board of the same specification, the linear motor thrust using the laminated sensor board is theoretically increased compared to the linear motor thrust using the integral sensor board. About 10%, energy consumption is about 10%. This is because the magnetic motor of the induction plate is used when the primary and secondary induction plates of the linear motor interact. There will be eddy currents on it. The magnetically conductive steel plate of the integral induction plate is a monolithic back iron, and the eddy current loss is large, and the magnetic conductive steel plate of the laminated induction plate is composed of a plurality of square steel laminations, and the eddy current loss is small.
尽管叠片式感应板次级比整体式感应板次级提高了直线电机的效率，但从直线电机次级的结构和材料上来说，其改变仍然还不够。叠片式感应板次级仅从部分结构上改变了整体式感应板次级导磁板的涡流损耗，且其导磁材料仍然采用普通钢材；而其次级的导电板的结构和材料仍然未变，降低次级的能耗还有更大的提升空间。本发明就是要在直线电机次级的整体结构和材料上有所突破，以取得更好的节能效果。 Although the laminated sensor board secondary improves the efficiency of the linear motor than the integral sensor board secondary, the change is still not enough from the structure and material of the linear motor secondary. The sub-layer of the laminated sensor board only changes the eddy current loss of the secondary magnetic plate of the integrated induction plate from a partial structure, and the magnetic conductive material still uses ordinary steel; and the structure and material of the secondary conductive plate remain unchanged. , reducing the secondary energy consumption and there is more room for improvement. The invention is to make a breakthrough in the overall structure and material of the linear motor secondary to achieve better energy saving effect.
技术问题technical problem
本发明的目的是提供一种更高效的直线电机轨道交通用栅形直线电机次级装置，提高现有直线电机轨道交通的推力和运行效率。 The object of the present invention is to provide a more efficient secondary device for a linear motor for linear motor rail transit, which improves the thrust and operating efficiency of the existing linear motor rail transit.
技术解决方案Technical solution
本发明是这样实现的，提供一种直线电机轨道交通用栅形直线电机次级装置，包括导磁铁芯、导电体以及安装支架，导电体包括一组栅形排列的导电导条以及连接相邻导电导条端部的导电端条；在导磁铁芯上设有与导电导条相适应的安装槽口，导电导条嵌入在安装槽口内，导电导条的两端部均延伸出安装槽口，导电端条设置在导磁铁芯的侧部；导磁铁芯设置在安装支架上。 The present invention is achieved by providing a secondary device for a linear motor for linear motor rail transit, comprising a magnetic core, an electrical conductor and a mounting bracket, the electric conductor comprising a set of conductive strips arranged in a grid and connecting adjacent a conductive strip at the end of the conductive strip; a mounting slot adapted to the conductive strip is disposed on the core of the conductive core, the conductive strip is embedded in the mounting slot, and both ends of the conductive strip extend out of the mounting slot The conductive end strip is disposed on a side of the magnetic core; the magnetic core is disposed on the mounting bracket.
进一步地，导磁铁芯为平板状。 Further, the magnetic conductive core is in the form of a flat plate.
进一步地，导磁铁芯由硅钢片冲制叠压而成，硅钢片沿导电导条的长度方向叠压。 Further, the conductive core is formed by laminating silicon steel sheets, and the silicon steel sheets are laminated along the length of the conductive bars.
进一步地，安装支架通过紧固件固定导磁铁芯。 Further, the mounting bracket secures the core of the magnet through the fastener.
进一步地，在安装支架的上部设置有若干限位条，限位条设置在相邻的导电导条之间。 Further, a plurality of limiting strips are disposed on the upper portion of the mounting bracket, and the limiting strips are disposed between the adjacent conductive strips.
进一步地，在安装支架的外侧面凸设有铺设安装用的安装板，在安装板上设置有安装孔。 Further, a mounting plate for laying and mounting is protruded on an outer side surface of the mounting bracket, and a mounting hole is provided on the mounting plate.
进一步地，导电导条以及导电端条一体连接。 Further, the conductive bars and the conductive strips are integrally connected.
进一步地，导电导条以及导电端条由导电性能良好的材料制成。 Further, the conductive strips and the conductive end strips are made of a material having good electrical conductivity.
进一步地，导电导条以及导电端条的材料为纯铜材。 Further, the material of the conductive bar and the conductive end strip is pure copper.
进一步地，导电端条的截面积大于导电导条的截面积。 Further, the cross-sectional area of the conductive end strip is larger than the cross-sectional area of the conductive strip.
有益效果Beneficial effect
与现有技术相比，本发明提供的栅形直线电机次级 装置， 首先，从整体结构上与叠片式感应板次级 装置 以及整体式感应板次级 装置 完全不一样，本发明的结构设计更符合直线电机的运行原理，更能体现直线电机的优势和特点。现有的直线电机的感应板次级装置大多采用整块金属板或复合金属板，并不存在明显的导电导条，因此，与本发明 相比， 在感应板上的感应电流无明显导向及导电铝板内电流的分布较乱，其涡流损耗大，效率低。其次，从材料上与现有的叠片式感应板次级 装置 以及整体式感应板次级 装置 也完全不一样，现有的感应板采用导电铝板以及导磁钢板制成，而本发明的栅形感应板材料是导电性能良好的纯铜材和导磁性能良好的硅钢片，导电和导磁性能增强，电能损失少，效率更高。而且，在次级导磁铁芯厚度不变的前提下，可以增大初级导磁铁芯的厚度，提高直线电机的牵引力。  Compared with the prior art, the present invention provides a grid linear motor secondary device, firstly, from the overall structure and the laminated sensor board secondary device And integral induction board secondary device The design of the invention is more in line with the operating principle of the linear motor, and can better reflect the advantages and characteristics of the linear motor. The inductive board secondary device of the existing linear motor mostly adopts a single metal plate or a composite metal plate, and there is no obvious conductive bar, and therefore, the present invention In contrast, the induced current on the sensing board has no obvious guidance and the current distribution in the conductive aluminum plate is disordered, and the eddy current loss is large and the efficiency is low. Secondly, the material is combined with the existing laminated sensor board secondary device and the integrated sensor board secondary Device It is also completely different. The existing induction plate is made of conductive aluminum plate and magnetic conductive steel plate, and the grid-shaped induction plate material of the invention is pure copper material with good electrical conductivity and silicon steel sheet with good magnetic permeability, conductivity and magnetic permeability. Can be enhanced, less power loss, and higher efficiency. Moreover, under the premise that the thickness of the secondary magnetic core is constant, the thickness of the primary magnetic core can be increased, and the traction of the linear motor can be improved.
附图说明DRAWINGS
图 1 为整体式感应板次级装置结构示意图； Figure 1 is a schematic view showing the structure of a unitary induction board secondary device;
图 2 为叠片式感应板次级装置结构示意图； 2 is a schematic structural view of a secondary device of a laminated sensor board;
图 3 为本发明的一较佳实施例的结构示意图； 3 is a schematic structural view of a preferred embodiment of the present invention;
图 4 为图 3 中导电体内的感应电流分布示意图； Figure 4 is a schematic diagram showing the distribution of induced current in the conductor in Figure 3;
图 5 为图 4 的感应电流回路示意图。 Figure 5 is a schematic diagram of the induced current loop of Figure 4.
本发明的最佳实施方式BEST MODE FOR CARRYING OUT THE INVENTION
为了使本发明所要解决的技术问题、技术方案及有益效果更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。 The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
请参照图 3 所示，是本发明的一个较佳实施例，本实施例的直线电机轨道交通用栅形直线电机次级装置包括导磁铁芯 5 、导电体 6 以及安装支架 7 。导磁铁芯 5 为平板状，导电体 6 设置在导磁铁芯 5 内，导磁铁芯 5 设置在安装支架 7 上。 Please refer to Figure 3 Shown is a preferred embodiment of the present invention. The secondary device of the linear motor for linear motor rail transit of the present embodiment includes a magnetic core 5, an electric conductor 6, and a mounting bracket 7. Conductor core 5 In the form of a flat plate, the conductor 6 is disposed in the core 5 and the core 5 is placed on the mounting bracket 7.
导电体 6 包括一组栅形排列的导电导条 61 以及连接相邻导电导条 61 端部的导电端条 62 。导电导条 61 以及导电端条 62 一体连接，且形成栅形形状，具有多个封闭的回路，使得直线电机次级的感应电流有规则地在次级中按设计要求在回路中流动，感应电流的分布更有规律，涡流损耗小，效率高。导电端条 62 的截面积大于导电导条 61 的截面积。导电导条 61 以及导电端条 62 由导电性能良好的材料制成，例如纯铜、合金铜、铝和合金铝。在本实施例中，导电导条 61 以及导电端条 62 的材料为纯铜材，次级的内阻小， 降低次级的能耗， 进一步提高次级效率。 The electrical conductor 6 includes a plurality of grid-shaped conductive strips 61 and conductive strips 62 connecting the ends of adjacent conductive strips 61. . Conductive bar 61 and conductive strip 62 The utility model is integrally connected and has a grid shape and has a plurality of closed loops, so that the induced current of the secondary of the linear motor regularly flows in the loop according to design requirements in the secondary, the distribution of the induced current is more regular, and the eddy current loss is small. ,efficient. Conductive strip The cross-sectional area of 62 is larger than the cross-sectional area of the conductive bar 61. The conductive strip 61 and the conductive strip 62 are made of a material having good electrical conductivity, such as pure copper, alloy copper, aluminum, and alloy aluminum. In this embodiment, the conductive strip The material of the conductive end strip 62 is pure copper, and the secondary internal resistance is small, which reduces the secondary energy consumption and further improves the secondary efficiency.
在导磁铁芯 5 顶面上凹设有与导电导条 61 相适应的多个安装槽口 51 ，导电导条 61 嵌入在安装槽口 51 内，导电导条 61 的两端部均延伸出安装槽口 51 ，导电端条 62 设置在导磁铁芯 5 的侧部。导磁铁芯 5 由导磁性能良好的硅钢片冲制叠压而成，硅钢片沿导电导条 61 的长度方向叠压，优选为 0.5mm 厚度的硅钢片。导磁铁芯 5 采用导磁性能良好的硅钢片，可以进一步 降低次级的能耗， 提高次级效率。安装槽口 51 的形状和数量 按直线电机相对于初级的设计要求来确定。 安装槽口 51 用于固定导电导条 61 ，且可与直线电机的初次级磁路相互沟通。 A plurality of mounting notches 51 corresponding to the conductive bars 61 are recessed on the top surface of the conductive core 5, and the conductive bars 61 Embedded in the mounting notch 51, both ends of the conductive bar 61 extend out of the mounting notch 51, and the conductive end strip 62 is disposed on the side of the conductive core 5. Conductor core 5 The silicon steel sheet is punched and laminated by a magnetic conductive sheet having good magnetic permeability, and the silicon steel sheet is laminated along the longitudinal direction of the conductive strip 61, preferably a silicon steel sheet having a thickness of 0.5 mm. Conductor core 5 The use of silicon steel sheets with good magnetic permeability can further reduce secondary energy consumption and improve secondary efficiency. The shape and number of mounting slots 51 are determined by the design requirements of the linear motor relative to the primary. Mounting slot 51 It is used to fix the conductive bar 61 and can communicate with the primary and secondary magnetic circuits of the linear motor.
导电导条 61 嵌合在安装槽口 51 内且分别延伸至安装槽口 51 两端，导电导条 61 的顶面不高于导磁铁芯 5 的顶面。导电端条 62 分别设置在导磁铁芯 5 的两侧，单侧的导电端条 62 分别把该侧的每个导电导条 61 的端部连接在一起。导电体 6 呈栅形。 The conductive bars 61 are fitted in the mounting notches 51 and extend to the ends of the mounting notches 51, respectively, and the conductive bars 61 The top surface is not higher than the top surface of the magnetic conductor core 5. Conductive end strips 62 are respectively disposed on both sides of the conductive core 5, and the conductive strips 62 on one side respectively place each conductive strip 61 on the side. The ends are connected together. The conductor 6 has a grid shape.
安装支架 7 分别设置在导磁铁芯 5 两侧面，安装支架 7 通过紧固件 8 固定导磁铁芯 5 。在本实施例中，紧固件 8 为螺栓与螺母联接。三颗螺栓分别贯穿导磁铁芯 5 ，在导磁铁芯 5 的另一端与螺母旋紧。安装支架 7 用于铺设安装固定。在安装支架 7 的外侧面凸设有铺设安装用的安装板 71 ，在安装板 71 上设置有便于安装的安装孔 72 。在安装支架 7 的上部设置有若干限位条 73 ，限位条 73 设置在相邻的导电导条 61 之间，用于固定导磁铁芯 5 以及限制导电导条 61 的安装位置。 Mounting brackets 7 are respectively placed on both sides of the magnetic core 5, and the mounting brackets 7 are fixed by the fasteners 8 . In the present embodiment, the fastener 8 is a bolt and nut coupling. Three bolts are respectively passed through the core 5 and screwed to the nut at the other end of the core 5. Mounting bracket 7 For laying and fixing. Mounting bracket A mounting plate 71 for laying and mounting is protruded from the outer side surface of the mounting plate 71, and a mounting hole 72 for easy installation is provided on the mounting plate 71. A plurality of limiting strips 73 are arranged on the upper part of the mounting bracket 7, and the limiting strips 73 It is disposed between adjacent conductive bars 61 for fixing the core 5 and limiting the mounting position of the conductive bars 61.
实际使用时，直线电机的初级设置在轨道列车转向架上，而本发明的 直线电机轨道交通用栅形直线电机次级装置沿轨道与直线电机初级相对应地 铺设在路基的轨道板或轨枕基础上。 In actual use, the primary of the linear motor is placed on the rail train bogie, and the present invention The secondary device of the linear motor for linear motor rail transit is laid on the track plate or sleeper of the roadbed along the track and the primary of the linear motor.
当直线感应电机初级的三相绕组中通入三相对称正弦电流后，初级与次级相互作用后在它们之间的气隙中会产生气隙磁场。当不考虑由于导磁铁芯 5 两端开断而引起的纵向边端效应时，这个气隙磁场的的分布情况可看成沿展开的直线方向呈正弦形分布。当三相电流随时间变化时，气隙磁场将按 A 、 B 、 C 相序沿直线移动。 这个磁场是平移的，因此称为行波磁场。 当次级为栅形次级时，次级导条在行波磁场切割下，将感应电动势并产生感应电流。而导电导条 61 的电流和气隙磁场相互作用便产生电磁推力。在这个电磁推力的作用下，如果次级是固定不动的，那末初级就带着列车顺着行波磁场运动的方向作直线运动。 When a three-phase symmetrical sinusoidal current is passed through the primary three-phase winding of the linear induction motor, the primary and secondary interactions create an air gap magnetic field in the air gap between them. When not considered due to the magnetic core 5 When the longitudinal edge effect caused by the breaking of the two ends, the distribution of the air gap magnetic field can be regarded as a sinusoidal distribution along the linear direction of the expansion. When the three-phase current changes with time, the air gap magnetic field will be A, B, C The phase sequence moves in a straight line. This magnetic field is translational and is therefore called a traveling wave magnetic field. When the secondary is a grid-shaped secondary, the secondary bar will induce an electromotive force and generate an induced current under the cutting magnetic field cutting. Conductive bar 61 The interaction of the current and the air gap magnetic field produces an electromagnetic thrust. Under the action of this electromagnetic thrust, if the secondary is stationary, then the primary moves with the train in the direction of the traveling wave magnetic field.
请一同参照图 4 以及图 5 ， 分别画出了导电体 6 内假想的感应磁场和感应电流以及导电体 6 内感应电流的分布。图中 l δ 为初级导磁铁芯的叠片厚度， c 为次级在 l δ 长度方向伸出初级铁芯的宽度，它用来作为次级感应电流的端部通路， c 的大小将影响次级的电阻。在本发明中，次级感应电流的端部通路专门设置了导电端条 62 。因为 导电端条 62 的截面积大于导电导条 61 的截面积，降低 次级感应电流在导电端条 62 内的消耗 。 导电端条 62 采用导电性能良好的纯铜材料，所以，进一步降低了次级的电阻，提高效率。导电体 6 可以减少感应涡流的损耗，同时，使得次级的磁路更合理，增大导磁铁芯 5 的磁通量， 提高次级效率 。Referring to FIG. 4 and FIG. 5 together, the imaginary induced magnetic field and induced current in the conductor 6 and the distribution of the induced current in the conductor 6 are respectively plotted. FIG. L δ is the thickness of the laminations of the primary magnetic core, c is the width of the primary secondary core extending in the longitudinal direction l δ, it is used as an end portion of the secondary induced current path, the magnitude of the impact times C Class resistance. In the present invention, the end passage of the secondary induced current is specifically provided with a conductive end strip 62. Since the cross-sectional area of the conductive end strip 62 is larger than the cross-sectional area of the conductive strip 61, the consumption of the secondary induced current in the conductive end strip 62 is reduced. The conductive end strip 62 is made of a pure copper material with good electrical conductivity, so that the secondary resistance is further reduced and the efficiency is improved. The electric conductor 6 can reduce the loss of the induced eddy current, and at the same time, makes the secondary magnetic circuit more reasonable, increases the magnetic flux of the magnetic conductive core 5, and improves the secondary efficiency.
另一方面，由于设置了专门的导电端条 62 用于端部通路，使得 l δ 的长度可以相对地增大，甚至达到初级导磁铁芯（图中未示出）厚度与次级导磁铁芯 5 厚度完全重叠的地步，更有效地利用次级导磁铁芯 5 的厚度。在次级导磁铁芯 5 厚度不变的前提下，可以增大初级导磁铁芯的厚度，提高直线电机的牵引力。On the other hand, since a special conductive end strip 62 is provided for the end passage, the length of l δ can be relatively increased, even reaching the thickness of the primary core (not shown) and the secondary core. 5 The thickness of the secondary magnetic core 5 is more effectively utilized at the point where the thickness is completely overlapped. Under the premise that the thickness of the secondary magnetic core 5 is constant, the thickness of the primary magnetic core can be increased to improve the traction of the linear motor.
本实施例的直线电机轨道交通用栅形直线电机次级装置采用栅形导电体感应板的直线电机推力比采用叠片式感应板的直线电机推力理论上要增大 10% 左右，能耗节约 10% 左右。 The linear motor of the linear motor for the linear motor rail transit of the present embodiment adopts the grid-shaped electric conductor sensing plate, and the linear motor thrust of the linear electric induction sensor board is theoretically increased by about 10%, and the energy consumption is saved. 10% Left and right.
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。 The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.
本发明的实施方式Embodiments of the invention
工业实用性Industrial applicability
序列表自由内容Sequence table free content

Claims (1)

  1. 1 ．一种直线电机轨道交通用栅形直线电机次级装置，包括导磁铁芯、导电体以及安装支架，其特征在于，所述导电体包括一组栅形排列的导电导条以及连接相邻导电导条端部的导电端条；在所述导磁铁芯上设有与导电导条相适应的安装槽口，所述导电导条嵌入在所述安装槽口内，导电导条的两端部均延伸出安装槽口，所述导电端条设置在导磁铁芯的侧部；所述导磁铁芯设置在安装支架上。1 . A secondary device for a linear motor for linear motor rail transit, comprising a magnetic core, an electrical conductor and a mounting bracket, wherein the electrical conductor comprises a set of conductive strips arranged in a grid and connecting adjacent conductive guides a conductive end strip at the end of the strip; a mounting slot adapted to the conductive strip is disposed on the core of the conductive magnet, the conductive strip is embedded in the mounting slot, and both ends of the conductive strip extend Out of the mounting slot, the conductive end strip is disposed on a side of the core of the conductive magnet; the core of the conductive magnet is disposed on the mounting bracket.
    2 ．如权利要求 1 所述的直线电机轨道交通用栅形直线电机次级装置，其特征在于，所述导磁铁芯为平板状。2 . Claims 1 The secondary device for a linear motor of a linear motor rail transit is characterized in that the core of the conductive magnet is in a flat shape.
    3 ．如权利要求 2 所述的直线电机轨道交通用栅形直线电机次级装置，其特征在于，所述导磁铁芯由硅钢片冲制叠压而成，所述硅钢片沿所述导电导条的长度方向叠压。3 . Claims 2 The linear motor secondary device for linear motor rail transit, characterized in that the magnetic core is punched and laminated by a silicon steel sheet, and the silicon steel sheet is laminated along the length of the conductive strip .
    4 ．如权利要求 3 所述的直线电机轨道交通用栅形直线电机次级装置，其特征在于，所述安装支架通过紧固件固定所述导磁铁芯。4 . Claims 3 The linear linear motor secondary device for linear motor rail transit is characterized in that the mounting bracket fixes the magnetic core of the magnet by a fastener.
    5 ．如权利要求 4 所述的直线电机轨道交通用栅形直线电机次级装置，其特征在于，在所述安装支架的上部设置有若干限位条，所述限位条设置在相邻的所述导电导条之间。5 . Claims 4 The linear motor secondary device for linear motor rail transit is characterized in that: a plurality of limiting strips are disposed on an upper portion of the mounting bracket, and the limiting strips are disposed on adjacent conductive strips between.
    6 ．如权利要求 1 所述的直线电机轨道交通用栅形直线电机次级装置，其特征在于，在所述安装支架的外侧面凸设有铺设安装用的安装板，在所述安装板上设置有安装孔。6 . Claims 1 The secondary device for a linear motor of a linear motor rail transit is characterized in that a mounting plate for laying and mounting is protruded on an outer side surface of the mounting bracket, and a mounting hole is provided on the mounting plate.
    7 ．如权利要求 1 所述的直线电机轨道交通用栅形直线电机次级装置，其特征在于，所述导电导条以及导电端条一体连接。7 . Claims 1 The linear linear motor secondary device for linear motor rail transit is characterized in that the conductive bar and the conductive end strip are integrally connected.
    8 ．如权利要求 7 所述的直线电机轨道交通用栅形直线电机次级装置，其特征在于，所述导电导条以及导电端条由导电性能良好的材料制成。8 . Claim 7 The linear linear motor secondary device for linear motor rail transit is characterized in that the conductive bar and the conductive end strip are made of a material with good electrical conductivity.
    9 ．如权利要求 8 所述的直线电机轨道交通用栅形直线电机次级装置，其特征在于，所述导电导条以及导电端条的材料为纯铜材。9 . According to claim 8 The linear linear motor secondary device for linear motor rail transit is characterized in that the material of the conductive bar and the conductive end strip is pure copper.
    10 ．如权利要求 1 所述的直线电机轨道交通用栅形直线电机次级装置，其特征在于，所述导电端条的截面积大于所述导电导条的截面积。10 . Claims 1 The linear motor secondary device for linear motor rail transit is characterized in that the cross-sectional area of the conductive end strip is larger than the cross-sectional area of the conductive strip.
PCT/CN2013/080417 2013-07-30 2013-07-30 Grid-shaped linear motor secondary device for linear motor rail transit WO2015013884A1 (en)

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PCT/CN2013/080417 WO2015013884A1 (en) 2013-07-30 2013-07-30 Grid-shaped linear motor secondary device for linear motor rail transit
JP2016530294A JP2016525866A (en) 2013-07-30 2013-07-30 Secondary device of grid-like linear motor for linear motor rail traffic

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PCT/CN2013/080417 WO2015013884A1 (en) 2013-07-30 2013-07-30 Grid-shaped linear motor secondary device for linear motor rail transit

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CN110112883A (en) * 2019-06-12 2019-08-09 杭州新峰恒富科技有限公司 A kind of netted secondary line inductance electromotor of stereo garage long hole

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US5203430A (en) * 1991-10-17 1993-04-20 Otis Elevator Company Elevator flat linear motor secondary
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CN110112883A (en) * 2019-06-12 2019-08-09 杭州新峰恒富科技有限公司 A kind of netted secondary line inductance electromotor of stereo garage long hole

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