WO2023097759A1

WO2023097759A1 - Inductive power supply test bench

Info

Publication number: WO2023097759A1
Application number: PCT/CN2021/137392
Authority: WO
Inventors: 洛启; 谭富星; 吴陈; 周燕
Original assignee: 中车长春轨道客车股份有限公司
Priority date: 2021-12-01
Filing date: 2021-12-13
Publication date: 2023-06-08
Also published as: CN114200229A; CN114200229B

Abstract

An inductive power supply test bench (1000), comprising a peripheral housing (100), wherein the peripheral housing (100) comprises a bottom wall (101) and a peripheral circular wall (102) fixed to the bottom wall (101), and an inner wall of the peripheral circular wall (102) is provided, in the axial direction of the peripheral circular wall (102), with two layers of first mounting positions for mounting coils (700) or permanent magnets (600); a rotating shaft (200), which is internally arranged in the peripheral circular wall (102), is rotatably connected to the bottom wall (101), and is arranged coaxially with the peripheral circular wall (102); and turntables (300), the number of which is two, wherein the turntables (300) are fixed to the rotating shaft (200) at a preset distance in the axial direction of the rotating shaft (200), and the turntables (300) respectively correspond to the two layers of mounting positions on the peripheral circular wall (102), and are provided with second mounting positions for mounting the coils (700) or the permanent magnets (600). During use, the corresponding permanent magnets (600) or the corresponding coils (700) are mounted on the peripheral circular wall (102) and the second mounting positions of the turntables (300) according to data needing to be measured, so as to simulate the operation speed and inductive power supply of a maglev train, thereby realizing experimental study on the non-contact power supply of the train.

Description

An inductive power supply test bench

This application claims the priority of the Chinese patent application with the application number 202111455941.0 and the application name "A Test Bench for Inductive Power Supply" submitted to the China Patent Office on December 01, 2021, the entire contents of which are incorporated in this application by reference.

technical field

The invention relates to the technical field of test devices, in particular to an induction power supply test bench.

Background technique

Traditional trains use catenary, catenary rail and other contact methods for power supply. When the train is running, the friction between the pantograph and the catenary or the friction between the collector shoe and the composite rail will hinder the train; and due to mechanical wear, it must be Regular maintenance and replacement of equipment increases maintenance costs; this contact power supply structure that produces mechanical friction also limits the upper limit of the train's speed, posing safety hazards. Therefore, non-contact power supply technology has been more and more widely used. However, there is no experimental research on contactless power supply.

Therefore, how to realize the experimental research on the non-contact power supply of trains is a technical problem to be solved urgently by those skilled in the art.

Contents of the invention

In view of this, the purpose of the present invention is to provide an inductive power supply test bench, which can realize the experimental research on the non-contact power supply of trains, and provide guidance for the non-contact power supply of trains.

In order to achieve the above object, the present invention provides the following scheme:

An inductively powered test bench comprising:

The peripheral casing, the peripheral casing includes a bottom wall and a peripheral circular wall fixed on the bottom wall, the inner wall of the peripheral circular wall is provided with two layers along the axial direction of the peripheral circular wall for installing coils Or the first installation position of the permanent magnet;

A rotating shaft, the rotating shaft is built in the peripheral circular wall, the rotating shaft is rotatably connected to the bottom wall, and is coaxially arranged with the peripheral circular wall;

Turntables, the number of which is 2, fixed on the rotating shaft at a preset distance along the axial direction of the rotating shaft, and respectively corresponding to the two-layer installation positions on the peripheral circular wall, and the The turntable is provided with a second installation position for installing the coil or the permanent magnet.

In a specific embodiment, a non-energized coil winding is installed on the second installation position of the turntable near the bottom wall on the rotating shaft, and the first installation position of the layer near the bottom wall on the outer peripheral wall is The stator coil winding with alternating current is installed on the position.

In another specific embodiment, permanent magnets are installed on the second mounting position of the turntable close to the bottom wall on the rotating shaft, and permanent magnets are installed on the first mounting position of the layer close to the bottom wall on the peripheral circular wall. The stator coil windings with alternating current are installed.

In another specific embodiment, a coil winding with direct current is installed on the second installation position of the turntable close to the bottom wall on the rotating shaft, and the first layer of the outer circular wall close to the bottom wall A stator coil winding with alternating current is installed on a mounting position.

In another specific embodiment, permanent magnets and current collecting coils are installed on the second installation position of the turntable far away from the bottom wall on the rotating shaft, and the first layer of the outer circular wall far away from the bottom wall A levitation coil is installed on an installation position.

In another specific embodiment, a levitation coil is installed on the second installation position of the turntable far away from the bottom wall on the rotating shaft, and a suspension coil is installed on the first installation position of the layer far away from the bottom wall on the peripheral circular wall. Installed with permanent magnets and collector coils.

In another specific embodiment, the bottom wall is integrally connected with the peripheral circular wall.

In another specific embodiment, the peripheral circular wall includes a first arc-shaped wall and a second arc-shaped wall;

The first arc-shaped wall is fixed on the bottom wall, one side of the second arc-shaped wall is hinged to one side of the first arc-shaped wall, and the other side of the second arc-shaped wall is hinged to The other side of the first arc-shaped wall is detachably connected.

In another specific embodiment, the other side of the second arc-shaped wall is engaged with the other side of the first arc-shaped wall.

In another specific embodiment, the rotating shaft is a hollow shaft.

Various embodiments according to the present invention can be combined arbitrarily as required, and the embodiments obtained after these combinations are also within the scope of the present invention, and are part of the specific embodiments of the present invention.

The induction power supply test bench provided by the present invention, when in use, according to the data required to be measured, respectively install corresponding permanent magnets or corresponding coils at the first installation positions of the two layers of the peripheral circular wall and the second installation positions of the two rotating disks ( collector coil and levitation coil, etc.) to simulate the running speed of the magnetic levitation train and the situation of collecting induction power supply, that is, the present invention realizes the experimental research on the non-contact power supply of the train, and provides guidance for the magnetic levitation train.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without novelty efforts.

Fig. 1 is the partial sectional structure schematic diagram of the induction power supply test bench provided by the present invention;

Fig. 2 is a structural schematic view of the induction power supply test bench provided by the present invention without a rotating shaft and a peripheral casing;

Fig. 3 is the schematic structural diagram when the induction power supply test bench provided by the present invention is not equipped with a rotating shaft;

Fig. 4 is the flow chart when the induction power supply test bench simulating the squirrel-cage asynchronous induction motor provided by the present invention;

Fig. 5 is the flow chart when the induction power supply test bench simulating the squirrel-cage permanent magnet synchronous motor provided by the present invention;

Fig. 6 is the flow chart when the induction power supply test bench simulating the squirrel-cage excitation synchronous motor provided by the present invention;

Fig. 7 is a kind of flow chart that the induction power supply test bench provided by the present invention obtains the induced electromotive force of the collector coil;

Fig. 8 is another flow chart of obtaining the induced electromotive force of the collector coil by the induction power supply test bench provided by the present invention.

Among them, in Figure 1-Figure 8:

Inductive power supply test bench 1000, peripheral shell 100, bottom wall 101, peripheral circular wall 102, rotating shaft 200, turntable 300, upper turntable 301, lower turntable 302, inductive power supply layer 400, drive layer 500, permanent magnet 600, coil 700.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings 1 to 8 in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Example. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only In order to facilitate the description of the present invention and simplify the description, it does not indicate or imply that the referred position or element must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance.

As shown in Figures 1-3, the present invention provides an inductive power supply test bench 1000, which can realize the experimental research on the non-contact power supply of trains and provide guidance for the non-contact power supply of trains.

Specifically, the induction power supply test bench 1000 includes a peripheral housing 100, a rotating shaft 200, and a turntable 300. The peripheral housing 100 includes a bottom wall 101 and a peripheral circular wall 102. The peripheral circular wall 102 is fixed on the bottom wall 101, that is, the bottom wall 101 The peripheral circular wall 102 provides support. It should be noted that the bottom wall 101 may also be a rectangular plate, or a circular plate, etc., and the specific shape is not limited. The peripheral circular wall 102 is cylindrical and fixed on the bottom wall 101 . Of course, it can be understood that a top cover can also be installed on the top of the peripheral circular wall 102 to close the peripheral circular wall 102 .

The inner wall of the peripheral circular wall 102 is provided with two layers of first mounting positions along the axial direction of the peripheral circular wall 102 , and the first mounting positions are used for mounting the coil 700 or the permanent magnet 600 . Specifically, the first installation positions of each layer are evenly distributed inside the peripheral circular wall 102 along the circumferential direction of the peripheral circular wall 102 .

The rotating shaft 200 is built in the peripheral circular wall 102 , the rotating shaft 200 is rotatably connected to the bottom wall 101 , and is arranged coaxially with the peripheral circular wall 102 .

The number of turntables 300 is 2, fixed on the rotating shaft 200 at a preset distance along the axial direction of the rotating shaft 200, and respectively corresponding to the two-layer installation positions on the peripheral circular wall 102, and the rotating disk 300 is provided with installation coils 700 Or the second installation position of the permanent magnet 600. Specifically, the installation positions of the two turntables 300 along the rotating shaft 200 are consistent with the heights of the first installation positions of the two layers on the peripheral circular wall 102 .

The induction power supply test bench 1000 provided by the present invention has two upper and lower layers of coaxial rotating mechanisms: two turntables 300 . Among them, the first layer of rotating mechanism is the induction power supply layer 400, which is responsible for simulating the generation process of the induced electromotive force. According to the test requirements, the turntable 300 of the induction power supply layer 400 and the inner side of the peripheral circle can choose to install collector coils, suspension coils, permanent magnets 600, etc. device. The other layer of rotating mechanism is the driving layer 500, which is used to simulate the operation of an asynchronous motor or a synchronous motor. It can be configured as a squirrel-cage asynchronous motor, a squirrel-cage permanent magnet 600 synchronous motor or a squirrel-cage excitation synchronous motor according to the specific experiment content.

The inductive power supply test bench 1000 provided by the present invention, when in use, installs corresponding permanent magnets or corresponding permanent magnets at the first installation positions of the two layers of the peripheral circular wall 102 and the second installation positions of the two turntables 300 respectively according to the data required for measurement. The coil 700 (collector coil and levitation coil etc.) is used to simulate the running speed of the magnetic levitation train and the situation of collecting induction power supply, that is, the present invention has realized the experimental research on the non-contact power supply of the train, and provides guidance for the magnetic levitation train.

The linear motor structure of the actual maglev train is composed of the propulsion coil 700 installed on the ground, the coil 700 (superconducting coil or common excitation coil) on the train with direct current, and the power conversion device. The three-phase alternating voltage is passed into the propulsion coil 700, and the propulsion coil 700 can generate a high-speed traveling wave magnetic field, which interacts with the magnetic field generated by the superconducting coil (or excitation coil) to generate thrust on the car body, and then drive train movement.

Linear motors were originally evolved from rotary motors by expanding the stator and rotor; it is usually considered that the stator part is the primary and the rotor part is the secondary. In consideration of reducing the space occupied by the induction power supply test bench 1000 and reflecting the operating characteristics of the linear motor as much as possible, the induction power supply test bench 1000 adopts a rotating motor to be equivalent to the linear motor structure in the maglev train.

Specifically, the present invention discloses that the drive layer 500 is configured as follows: a squirrel-cage asynchronous induction motor, a squirrel-cage permanent magnet synchronous motor and a squirrel-cage excitation synchronous motor.

When simulating a squirrel-cage asynchronous induction motor, as shown in Figure 4, a non-energized coil winding is installed on the second installation position of the turntable 300 on the rotating shaft 200 close to the bottom wall 101, specifically, the coil winding is detachable by screws or the like. It is installed on the second installation position, so that other coils 700 or permanent magnets 600 can be installed when performing other tests.

On the first installation position of the layer near the bottom wall 101 on the peripheral circular wall 102, a stator coil winding with alternating current is installed. Specifically, the stator coil winding is detachably installed on the first installation position by screws or the like, so as to facilitate other For testing, other coils 700, permanent magnets 600, and the like can be installed.

For the convenience of expression, the first installation position of the layer close to the bottom wall 101 is named as the lower layer of the peripheral circular wall 102, the first installation position of the layer far away from the bottom wall 101 is the upper layer of the peripheral circular wall 102, and the turntable 300 close to the bottom wall 101 is the lower layer. The turntable 302 , the turntable 300 away from the bottom wall 101 is the upper turntable 301 .

The alternating current is fed into the stator coil winding inside the peripheral circular wall 102, and the stator coil winding will generate a rotating magnetic field, which corresponds to the high-speed traveling magnetic field in the actual maglev train system. At the same time, the coil winding of the lower turntable 302 cuts the rotating magnetic field to generate an induced electromotive force, which then generates a current and interacts with the rotating magnetic field to form a rotating torque, driving the lower turntable 302 to rotate at a speed lower than that of the rotating magnetic field. The test platform works in the mode of squirrel-cage asynchronous induction motor, which can equivalently simulate the operation of asynchronous linear motor.

When simulating a squirrel-cage permanent magnet synchronous motor, as shown in Figure 5, a permanent magnet 600 is installed on the second installation position of the turntable 300 close to the bottom wall 101 on the rotating shaft 200, and a permanent magnet 600 is installed on the second installation position close to the bottom wall 101 on the peripheral circular wall 102. The stator coil winding with alternating current is installed on the first installation position of the layer.

The alternating current is fed into the stator coil winding inside the peripheral circular wall 102, and the stator coil winding will generate a rotating magnetic field, which corresponds to the high-speed traveling magnetic field in the actual maglev train system. At the same time, the rotating magnetic field generated by the stator coil winding interacts with the permanent magnet 600 on the lower turntable 302 to generate rotational torque to drive the lower turntable 302 to rotate at a synchronous speed. This scheme can simulate the operation of the permanent magnet 600 linear synchronous motor.

When simulating a squirrel-cage excitation synchronous motor, as shown in Figure 6, a coil winding with direct current is installed on the second installation position of the turntable 300 close to the bottom wall 101 on the rotating shaft 200, and on the peripheral circular wall 102 close to the bottom wall 101 The stator coil winding with alternating current is installed on the first installation position of the layer.

That is, the side wall of the lower turntable 302 is equipped with coil windings, which are used as superconducting coils or excitation coils on the equivalent maglev train. The coil windings are connected with direct current to generate a constant magnetic field; Squirrel-cage excited synchronous motor. The rotating magnetic field generated by the stator coil winding interacts with the magnetic field of the coil winding on the lower turntable 302 to generate a rotating torque, which pushes the lower turntable 302 to rotate at a synchronous speed. This scheme can simulate the working characteristics of the excitation linear synchronous motor.

In actual situations, when the maglev train is running at high speed, the suspension coils on both sides of the track cut the magnetic field generated by the superconducting coil on the train, generating induced electromotive force and changing magnetic field. Electromotive force, the invention can simulate the induced electromotive force generated by the collector coil when the maglev train is running.

In some embodiments, the permanent magnet 600 and the collector coil are installed on the second installation position of the turntable 300 away from the bottom wall 101 on the rotating shaft 200, and the permanent magnet 600 and the current collecting coil are installed on the first installation position of the layer far away from the bottom wall 101 on the peripheral circular wall 102. There are levitating coils, as shown in Figure 7.

During operation, the upper turntable 301 corresponding to the inductive power supply layer 400 rotates with the lower turntable 302, and the suspension coil of the peripheral circular wall 102 cuts the rotating magnetic field generated by the permanent magnet 600 to generate induced electromotive force and current, thereby generating a changing magnetic field. At the same time, the collector coil on the upper turntable 301 cuts the magnetic field of the levitation coil, thereby generating induced electromotive force. By replacing different permanent magnets 600 , the variation of the electromotive force of the collector coil can be evaluated when different currents are passed through the superconducting coil.

In some other embodiments, a levitation coil is installed on the second installation position of the turntable 300 away from the bottom wall 101 on the rotating shaft 200 , and a permanent magnet 600 is installed on the first installation position on the outer circular wall 102 far away from the bottom wall 101 and collector coils, as shown in Figure 8.

When the suspension coil rotates with the upper turntable 301, the suspension coil cuts the magnetic field of the permanent magnet 600 to generate a rotating magnetic field. The collector coil on the peripheral circular wall 102 cuts the rotating magnetic field to generate induced electromotive force. This scheme can also simulate the variation of the electromotive force of the collector coil with the change of the superconducting coil current.

In the present invention, alternating current is supplied to the lower stator coil winding inside the peripheral circular wall 102 to drive the lower turntable 302 corresponding to the driving layer 500 to rotate and drive the upper turntable 301 of the inductive power supply layer 400 coaxial with it. This process simulates a maglev train The linear motor driving part; the upper turntable 301 corresponding to the inductive power supply layer 400 makes the collector coil in the inductive power supply layer 400 generate an induced electromotive force during the rotation process, and this process reflects the induction power supply process of the maglev train at high speed. By equating the linear motor to a rotary motor, a lot of space is saved, and the process of driving and inductively powering the maglev train at high speed is truly simulated.

In some embodiments, the present invention specifically discloses that the bottom wall 101 is integrally connected with the peripheral circular wall 102 . It should be noted that, the connection between the bottom wall 101 and the peripheral circular wall 102 is not limited to integral molding, but may also be welded or detachably connected.

In some other embodiments, the present invention discloses that the peripheral circular wall 102 includes a first arc-shaped wall and a second arc-shaped wall, the first arc-shaped wall is fixed on the bottom wall 101, and one side of the second arc-shaped wall is connected to the first arc-shaped wall. One side of one arc-shaped wall is hinged, and the other side of the second arc-shaped wall is detachably connected with the other side of the first arc-shaped wall. The first curved wall and the second curved wall can form a complete cylindrical wall.

By setting the peripheral circular wall 102 in such a way that the first arc-shaped wall and the second arc-shaped wall can be opened and closed, it is convenient to realize the detachment of the coil 700 or the permanent magnet 600 at the first installation position and the second installation position.

Further, the invention specifically discloses that the other side of the second arc-shaped wall is engaged with the other side of the first arc-shaped wall. It should be noted that mounting blocks can also be provided on the outer walls of the first arc-shaped wall and the second arc-shaped wall respectively, and through holes or threaded holes allowing bolts to pass through are respectively provided on the mounting blocks to realize connection through bolts.

In some embodiments, the rotating shaft 200 is a hollow shaft to reduce weight. It should be noted that the rotating shaft 200 may also be a solid shaft.

The turntable 300 can be integrally connected with the rotating shaft 200 , or can be fastened on the rotating shaft 200 by fasteners, etc., and the specific connection form is not limited.

In some other embodiments, the present invention discloses that the inductive power supply test bench 1000 further includes a speed sensor and a voltage sensor for respectively measuring the rotational speed of the rotating shaft 200 and the induced electromotive force generated by the collector coil.

The present invention has the following advantages:

(1) The present invention can fully simulate the driving process and induction power supply process of the maglev train in the high-speed running state, and provides an important reference basis for the scheme design and planning of the maglev train;

(2) The application of the present invention can save a lot of cost, produce good economic benefits, provide a powerful tool for the research of the maglev train project, and can be applied to the research of other high-speed motion systems in the follow-up, and has good scientific research potential;

(3) The present invention improves the efficiency of maglev train-related tests, has better safety, and is conducive to the efficient and safe conduct of maglev train research.

It should be noted that the words indicating orientation in this article, for example, up and down, etc. are all set in the direction when the induction power supply test bench is used, and are only for the convenience of description, and do not have other specific meanings.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

In the description of this specification, descriptions referring to the terms "one embodiment", "example", "specific example" and the like mean that specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment of the present invention. In an embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are only to help illustrate the invention. The preferred embodiments do not exhaust all details nor limit the invention to only specific embodiments. Obviously, many modifications and variations can be made based on the contents of this specification. This description selects and specifically describes these embodiments in order to better explain the principle and practical application of the present invention, so that those skilled in the art can well understand and utilize the present invention. The invention is to be limited only by the claims, along with their full scope and equivalents.

Claims

An inductive power supply test bench is characterized in that it comprises:

The peripheral casing, the peripheral casing includes a bottom wall and a peripheral circular wall fixed on the bottom wall, the inner wall of the peripheral circular wall is provided with two layers along the axial direction of the peripheral circular wall for installing coils Or the first installation position of the permanent magnet;

A rotating shaft, the rotating shaft is built in the peripheral circular wall, the rotating shaft is rotatably connected to the bottom wall, and is coaxially arranged with the peripheral circular wall;

Turntables, the number of which is 2, fixed on the rotating shaft at a preset distance along the axial direction of the rotating shaft, and respectively corresponding to the two-layer installation positions on the peripheral circular wall, and the The turntable is provided with a second installation position for installing the coil or the permanent magnet.
The test bench for inductive power supply according to claim 1, characterized in that, a non-energized coil winding is installed on the second mounting position of the turntable on the rotating shaft close to the bottom wall, and on the outer circular wall close to the The stator coil winding with alternating current is installed on the first installation position of the bottom wall.
The induction power supply test bench according to claim 1, wherein a permanent magnet is installed on the second mounting position of the turntable close to the bottom wall on the rotating shaft, The stator coil winding with alternating current is installed on the first installation position of that layer.
The induction power supply test bench according to claim 1, wherein a coil winding with direct current is installed on the second mounting position of the turntable on the rotating shaft close to the bottom wall, The stator coil winding with alternating current is installed on the first installation position of the layer of the bottom wall.
The induction power supply test bench according to claim 1, wherein permanent magnets and collector coils are installed on the second installation position of the turntable far away from the bottom wall on the rotating shaft, A levitation coil is installed on the first installation position of the bottom wall.
The inductive power supply test bench according to claim 1, wherein a suspension coil is installed on the second installation position of the turntable far away from the bottom wall on the rotating shaft, and a suspension coil is installed on the second installation position of the turntable far away from the bottom wall A permanent magnet and a collector coil are installed on the first mounting position of that layer.
The inductive power supply test bench according to claim 1, wherein the bottom wall is integrally connected with the peripheral circular wall.
The induction power supply test bench according to claim 1, wherein the peripheral circular wall comprises a first arc-shaped wall and a second arc-shaped wall;

The first arc-shaped wall is fixed on the bottom wall, one side of the second arc-shaped wall is hinged to one side of the first arc-shaped wall, and the other side of the second arc-shaped wall is hinged to The other side of the first arc-shaped wall is detachably connected.
The test bench for inductive power supply according to claim 8, wherein the other side of the second arc-shaped wall is engaged with the other side of the first arc-shaped wall.
The induction power supply test bench according to any one of claims 1-9, wherein the rotating shaft is a hollow shaft.