CN111257789A - Simulation test device of tramcar non-contact power supply system - Google Patents
Simulation test device of tramcar non-contact power supply system Download PDFInfo
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- CN111257789A CN111257789A CN202010221018.XA CN202010221018A CN111257789A CN 111257789 A CN111257789 A CN 111257789A CN 202010221018 A CN202010221018 A CN 202010221018A CN 111257789 A CN111257789 A CN 111257789A
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- power supply
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- current receiving
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
Abstract
The invention relates to a simulation test device of a tramcar non-contact power supply system, which comprises: the device comprises a power supply module, a power supply induction coil, a current receiving coil, a rotating mechanism and a current transformer; the rotating mechanism comprises a central fixed support, a plurality of peripheral fixed supports, a plurality of rotating arms, a bearing, a rotating shaft and a variable-frequency driving motor; the power module supplies power to the power supply induction coil, the variable frequency driving motor drives the rotating shaft to rotate, and the rotating shaft drives the bearing and the rotating arm to rotate, so that the current receiving coil fixed on the rotating arm is driven to rotate along the inner side circumference of the circumference enclosed by the power supply induction coil, the electric energy of the power supply induction coil is transmitted to the current receiving coil through resonance induction coupling, and the current receiving coil transmits the electric energy to a load through the converter. The invention utilizes the annular power supply induction coil to simulate a long straight line, and the current receiving coil simulates a current receiving device at the bottom of the carriage of the tramcar, thereby reducing the test condition of the non-contact power supply system of the tramcar and effectively promoting the research progress of the non-contact power supply system of the tramcar.
Description
Technical Field
The invention relates to the field of simulation test devices, in particular to a simulation test device of a tramcar non-contact power supply system.
Background
The non-contact power supply utilizes magnetic field coupling to transmit electric energy without any electrical connection, and can effectively replace the traditional power transmission system under severe environments and when loads move. With the development of the contactless power supply technology, there have been more and more industries starting to adopt the technology to realize contactless power supply.
Tramcars are light rail transit vehicles that are driven by electricity and run on rails, and the vehicles do not discharge waste gas when driven by electricity. Tramcars have been rapidly developed in many cities at home and abroad as a novel, efficient and energy-saving large-traffic-volume urban public transportation facility. The power supply modes of the tramcar are mainly divided into several types, namely, full-line contact network power supply, full-line partial contact network power supply and full-line non-contact network power supply, and a non-contact power supply system of the tramcar is also paid attention and researched by multiple countries as a novel power supply system.
However, the non-contact power supply system of the tramcar needs to lay a long sectional type ground power supply induction coil along the line, so that a large field and investment are needed for testing, the test condition is high, and the research progress of the non-contact power supply system of the tramcar is greatly influenced.
Disclosure of Invention
The invention aims to provide a simulation test device of a non-contact power supply system of a tramcar, aiming at the defects of the conventional test mode.
In order to achieve the above object, the present invention provides a simulation test apparatus for a non-contact power supply system of a railroad car, the simulation test apparatus including: the device comprises a power supply module, a power supply induction coil, a current receiving coil, a rotating mechanism and a current transformer;
the rotating mechanism comprises a central fixing support, a plurality of peripheral fixing supports, a plurality of rotating arms, a bearing, a rotating shaft and a variable-frequency driving motor;
the vertical horizontal planes with equal height and equal spacing of the peripheral fixed supports are arranged on a circumference; the power supply induction coil is arranged around the plurality of peripheral fixing brackets;
the rotating shaft is arranged in the circle center of the circumference; the rotating shaft penetrates through the center of the central fixing support;
the bearing is sleeved on the upper part of the rotating shaft and is fixedly connected with the rotating shaft; the central fixing bracket is arranged at the lower part of the rotating shaft; the upper surface of the central fixing bracket is parallel to and not contacted with the lower surface of the bearing;
the variable-frequency driving motor is fixed inside the central fixing support; the variable frequency driving motor is electrically connected with the rotating shaft, and the rotating shaft drives the bearing to rotate;
the plurality of rotating arms comprise two or more groups of rotating arms which are symmetrically arranged, and in each group of rotating arms, the angle between every two rotating arms is a fixed value; each rotating arm is arranged parallel to the ground plane, one end of each rotating arm is fixedly connected with the bearing, and the current receiving coil is fixed at the other end of each rotating arm; the length of each rotating arm is equal; the length of the rotating arm is smaller than the radius of the circumference by a preset distance;
the power supply module supplies power to the power supply induction coil, the variable frequency driving motor drives the rotating shaft to rotate, the rotating shaft drives the bearing and the rotating arm to rotate, so that a current receiving coil fixed on the rotating arm is driven to rotate along the inner side circumference of the circumference enclosed by the power supply induction coil, electric energy of the power supply induction coil is transmitted to the current receiving coil through resonance induction coupling, and the current receiving coil transmits the electric energy to a load through the converter.
Preferably, each of the rotating arms comprises a first rotating arm, a second rotating arm and a telescopic device;
one end of the telescopic device is connected with the first rotating arm, and the other end of the telescopic device is connected with the second rotating arm, so that the second rotating arm partially or completely extends out of the first rotating arm, and the length of the rotating arm is changed.
Preferably, the bearing is a slip ring; the specific steps of transmitting the electric energy to a load through the current transformer by the current receiving coil are as follows:
and the current receiving coil transmits the electric energy to the converter through the slip ring, and the electric energy is transmitted to a load after being converted into current.
Preferably, the power module comprises an inverter, an LCC resonant circuit and a switch;
the urban power grid supplies power to the power module through direct current after rectification, and the inverter converts the direct current into alternating current to supply power to the LCC resonant circuit; the switch is arranged between the LCC resonant circuit and the power supply induction coil and controls the on-off of the circuit of the power supply induction coil.
Further preferably, the switch comprises a first switch and a second switch;
the power supply induction coil comprises a first coil part and a second coil part which are connected end to end;
the first switch control is arranged between the LCC resonant circuit and the first coil part and independently controls the circuit on-off of the first coil part;
the second switch control is arranged between the LCC resonance circuit and the second coil part and independently controls the circuit on-off of the second coil part.
Preferably, the power supply induction coil is a double-D type fixed sectional type power supply induction coil; the current receiving coil is a double-D type rotatable current receiving coil.
Preferably, in the simulation test apparatus, the power supply induction coil is used for simulating a long straight rail of a tramcar;
each current receiving coil is used for simulating a current receiving device of one carriage of the tramcar running on the long straight track.
The invention provides a simulation test device of a non-contact power supply system of a tramcar, which utilizes an annular power supply induction coil to simulate a long straight line, and a current receiving coil to simulate a current receiving device at the bottom of a carriage of the tramcar.
Drawings
Fig. 1 is a first structural schematic diagram of a simulation test device of a tramcar non-contact power supply system according to an embodiment of the invention;
fig. 2 is a second structural schematic diagram of the simulation test device of the tramcar non-contact power supply system according to the embodiment of the invention;
fig. 3 is a schematic perspective view of a rotating mechanism according to an embodiment of the present invention;
fig. 4 is a schematic top view of a rotating mechanism according to an embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
The invention provides a simulation test device of a non-contact power supply system of a tramcar, which is used for simulating the non-contact power supply system of the tramcar on a long straight line.
Fig. 1 is a first structural schematic diagram of a simulation test device of a tramcar non-contact power supply system according to an embodiment of the present invention, fig. 2 is a second structural schematic diagram of a simulation test device of a tramcar non-contact power supply system according to an embodiment of the present invention, fig. 3 is a perspective schematic diagram of a rotating mechanism according to an embodiment of the present invention, and fig. 4 is a top schematic diagram of a rotating mechanism according to an embodiment of the present invention. The technical scheme of the invention is detailed in the following by combining figures 1-4.
In order to understand the technical means of the present invention, the meaning of each component of the simulation test apparatus will be explained first.
The circumference surrounded by the power supply induction coils is used for simulating a long straight rail of the tramcar, and each current receiving coil is used for simulating a current receiving device at the bottom of one carriage of the tramcar running on the long straight rail. The variable frequency driving motor drives the rotating arm of the rotating mechanism to rotate, and the rotating speed simulates the running speed of the tramcar on the track. The air gap between the current receiving coil and the power supply induction coil is used for simulating the distance between the bottom of the tramcar and the track under the working conditions of light load and heavy load of the tramcar in the running process of the tramcar.
By the simulation test device of the non-contact power supply system of the tramcar, provided by the embodiment of the invention, various parameters of the current receiving coil, such as voltage, current, mutual inductance and the like, can be finally obtained under different power supply conditions, air gap sizes and rotating speeds. Through research on data such as different power supply conditions, air gap size, rotation speed, various parameters of corresponding current receiving coils and the like, the technical development of a non-contact power supply system of the tramcar is promoted.
As shown in fig. 1, the simulation test device for a non-contact power supply system of a tramcar according to the present invention includes: the device comprises a power module 1, a power supply induction coil 2, a current receiving coil 3, a rotating mechanism 4 and a current transformer 5.
The power module 1 includes an inverter 11, an LCC resonant circuit 12, and a switch 13. The power supply module 1 is used for supplying power to the power supply induction coil 2, namely supplying power to the track of the simulated tramcar.
Specifically, the urban power grid provides a power frequency alternating current power supply, the power frequency alternating current power supply is rectified to supply direct current power to the power module 1, and the inverter 11 converts the direct current power into alternating current power to supply power to the LCC resonant circuit 12. The switch 13 is provided between the LCC resonant circuit 12 and the power supply induction coil 2, and controls the on/off of the power supply induction coil 2.
In a preferred scheme, since the power supply induction coil 2 also has energy loss, the longer length can increase the power loss and reduce the power induction transmission efficiency. Therefore, the power supply induction coil 2 is processed in a sectional mode, and each section of the power supply induction coil 2 is independently controlled to be switched on and off.
Fig. 2 shows a scheme of independently controlling the on/off of two segments of power supply induction coils by using two switches. The two-stage power supply induction coil includes a first coil portion 21 and a second coil portion 22 which are connected end to end. The switch 13 includes a first switch 131 and a second switch 132. The first switch 131 is provided between the LCC resonant circuit 12 and the first coil portion 21, and independently controls the on/off of the circuit of the first coil portion 21. The second switch 132 is provided between the LCC resonant circuit 12 and the second coil part 22, and independently controls the on/off of the second coil part 22.
As shown in fig. 3, the rotating mechanism 4 includes a plurality of peripheral fixing brackets 41, a central fixing bracket 42, a rotating shaft 43, a bearing 44, a plurality of rotating arms 45, and a variable frequency drive motor 46. The rotating mechanism 4 is a horizontal rotating structure for reducing the influence of gravity factors during the rotating process.
A plurality of peripheral fixing brackets 41 are arranged on a circle at equal-height and equal-spacing vertical ground planes. The peripheral fixing bracket 41 is used for fixing the power supply induction coil 2, and the radius of the circumference can be changed by adjusting the position of the fixing bracket, so as to adjust the size of the air gap between the power supply induction coil 2 and the current receiving coil 3, and the schematic diagram of the air gap is shown in fig. 4.
The power supply induction coil 2 is arranged around a plurality of peripheral fixing brackets 41 to form a circle for simulating a long straight track of a tramcar. The power supply induction coil 2 is preferably a double-D type fixed sectional type power supply induction coil, the coupling efficiency of the double-D type fixed sectional type power supply induction coil is higher, the anti-deviation capability is stronger, and the high-efficiency transmission of non-contact electric energy is facilitated.
The rotating shaft 43 is disposed at the center of the circle, and the rotating shaft 43 penetrates the center of the central fixing bracket 42.
The bearing 44 is sleeved on the upper part of the rotating shaft 43, and the bearing 44 is fixedly connected with the rotating shaft 43. The central fixing bracket 42 is disposed at a lower portion of the rotating shaft 43, and is used for fixing the rotating shaft 43 and the variable frequency driving motor 46. The upper surface of the center fixing bracket 42 is parallel to and does not contact the lower surface of the bearing 44 to reduce the influence of frictional force factors.
A variable frequency drive motor 46 is fixed inside the central stationary bracket 42. The variable frequency driving motor 46 is electrically connected to the rotating shaft 43, and the rotating shaft 43 drives the bearing 44 to rotate.
The plurality of rotating arms 45 comprise two or more groups of rotating arms which are symmetrically arranged, and in each group of rotating arms, the angle between every two rotating arms 45 is a fixed value so as to simulate that carriages of a tramcar are connected at equal intervals. Each rotating arm 45 is arranged parallel to the ground plane, one end of the rotating arm 45 is fixedly connected with the bearing 44, and the current receiving coil 3 is fixed at the other end of the rotating arm 45. Each arm 45 is equal in length and is smaller than the radius of the circumference by a predetermined distance. The ground plane is here understood to be the carrier table.
The width of the current receiving coil 3 is smaller than the size of the air gap between the power supply induction coil 2 and the current receiving coil 3, i.e. smaller than a preset distance. The current receiving coil 3 is preferably a double-D type rotatable current receiving coil, and the improvement of the electric energy induction transmission efficiency is facilitated.
In a preferred version, each arm 45 comprises a first arm, a second arm and a telescopic device. One end of the telescopic device is connected with the first rotating arm, and the other end of the telescopic device is connected with the second rotating arm, so that the second rotating arm partially or completely extends out of the first rotating arm, the length of the rotating arm 45 is changed, and the size of an air gap between the power supply induction coil 2 and the current receiving coil 3 is changed. The telescopic device makes things convenient for the installation of rocking arm on the one hand, and on the other hand can adjust the size of air gap, under operating modes such as simulation tram driving in-process vehicle light load, vehicle heavy load, the distance of tram bottom and track.
A current transformer 5 and a load 6 may be arranged above the rotor arm 45, the current-receiving coil 3 transferring electrical energy directly through the current transformer 5 to the load 6. The load is preferably a fixed load in this embodiment.
In a preferred embodiment, the converter 5 and the load 6 may also be disposed below or outside the central fixing bracket 42, the bearing 44 is a slip ring, and the current receiving coil 3 transmits electric energy to the converter 5 through the slip ring and then to the load 6 after current conversion.
In the scheme of independently controlling the on-off of the two sections of power supply induction coils by adopting the two switches, one or more converters can be determined to be respectively connected with the current receiving coil according to the requirements of users, so that the transmission of electric energy is realized.
In the embodiment shown in fig. 2, there are 2 current transformers, a current transformer 51 is connected to the current receiving coil 31, and a current transformer 52 is connected to the current receiving coil 32. Since the situation of the power receiving device at the bottom of each compartment is slightly different, the electric energy transmitted to each current receiving coil is converted, and then the load 6 is connected after the conversion.
Referring to fig. 1 and 3, the work flow of the simulation test apparatus is as follows:
the power module 1 supplies power to the power supply induction coil 2, the variable frequency driving motor 46 drives the rotating shaft 43 to rotate, the rotating shaft 43 drives the bearing 44 and the rotating arm 45 to rotate, so that the current receiving coil 3 fixed on the rotating arm 45 is driven to rotate along the inner side circumference of the circumference enclosed by the power supply induction coil 2, the electric energy of the power supply induction coil 2 is transmitted to the current receiving coil 3 through resonance induction coupling, and the current receiving coil 3 transmits the electric energy to the load 6 through the converter 5.
By the simulation test device of the non-contact power supply system of the tramcar, provided by the embodiment of the invention, various parameters of the current receiving coil, such as voltage, current, mutual inductance and the like, can be finally obtained under different power supply conditions, air gap sizes and rotating speeds.
For example, when the power supply condition and the air gap size are the same, the fluctuation of the parameters of the current receiving coil according to the change of the rotating speed can be obtained; or obtaining the fluctuation situation of the parameters of the current receiving coil according to the change of the air gap size, namely the load situation under the condition that the power supply condition and the rotating speed are the same.
The invention provides a simulation test device of a non-contact power supply system of a tramcar, which is used for simulating the non-contact power supply system of the tramcar on a long straight line.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A simulation test device of a non-contact power supply system of a tramcar is characterized by comprising: the device comprises a power supply module, a power supply induction coil, a current receiving coil, a rotating mechanism and a current transformer;
the rotating mechanism comprises a central fixing support, a plurality of peripheral fixing supports, a plurality of rotating arms, a bearing, a rotating shaft and a variable-frequency driving motor;
the vertical horizontal planes with equal height and equal spacing of the peripheral fixed supports are arranged on a circumference; the power supply induction coil is arranged around the plurality of peripheral fixing brackets;
the rotating shaft is arranged in the circle center of the circumference; the rotating shaft penetrates through the center of the central fixing support;
the bearing is sleeved on the upper part of the rotating shaft and is fixedly connected with the rotating shaft; the central fixing bracket is arranged at the lower part of the rotating shaft; the upper surface of the central fixing bracket is parallel to and not contacted with the lower surface of the bearing;
the variable-frequency driving motor is fixed inside the central fixing support; the variable frequency driving motor is electrically connected with the rotating shaft, and the rotating shaft drives the bearing to rotate;
the plurality of rotating arms comprise two or more groups of rotating arms which are symmetrically arranged, and in each group of rotating arms, the angle between every two rotating arms is a fixed value; each rotating arm is arranged parallel to the ground plane, one end of each rotating arm is fixedly connected with the bearing, and the current receiving coil is fixed at the other end of each rotating arm; the length of each rotating arm is equal; the length of the rotating arm is smaller than the radius of the circumference by a preset distance;
the power supply module supplies power to the power supply induction coil, the variable frequency driving motor drives the rotating shaft to rotate, the rotating shaft drives the bearing and the rotating arm to rotate, so that a current receiving coil fixed on the rotating arm is driven to rotate along the inner side circumference of the circumference enclosed by the power supply induction coil, electric energy of the power supply induction coil is transmitted to the current receiving coil through resonance induction coupling, and the current receiving coil transmits the electric energy to a load through the converter.
2. The simulation test device of the tram non-contact power supply system according to claim 1, wherein each of the rotating arms comprises a first rotating arm, a second rotating arm and a telescoping device;
one end of the telescopic device is connected with the first rotating arm, and the other end of the telescopic device is connected with the second rotating arm, so that the second rotating arm partially or completely extends out of the first rotating arm, and the length of the rotating arm is changed.
3. The simulation test device of the tram non-contact power supply system according to claim 1, characterized in that the bearing is a slip ring; the specific steps of transmitting the electric energy to a load through the current transformer by the current receiving coil are as follows:
and the current receiving coil transmits the electric energy to the converter through the slip ring, and the electric energy is transmitted to a load after being converted into current.
4. The simulation test device of the tram non-contact power supply system according to claim 1, characterized in that the power supply module comprises an inverter, an LCC resonant circuit and a switch;
the urban power grid supplies power to the power module through direct current after rectification, and the inverter converts the direct current into alternating current to supply power to the LCC resonant circuit; the switch is arranged between the LCC resonant circuit and the power supply induction coil and controls the on-off of the circuit of the power supply induction coil.
5. The simulation test device of the tram non-contact power supply system according to claim 4, wherein the switch comprises a first switch and a second switch;
the power supply induction coil comprises a first coil part and a second coil part which are connected end to end;
the first switch control is arranged between the LCC resonant circuit and the first coil part and independently controls the circuit on-off of the first coil part;
the second switch control is arranged between the LCC resonance circuit and the second coil part and independently controls the circuit on-off of the second coil part.
6. The simulation test device of the tram non-contact power supply system according to claim 1, wherein the power supply induction coil is a double-D type fixed segment type power supply induction coil; the current receiving coil is a double-D type rotatable current receiving coil.
7. The simulation test device for a non-contact power supply system of a tram according to claim 1, wherein in the simulation test device, the power supply induction coil is used for simulating a long straight track of the tram;
each current receiving coil is used for simulating a current receiving device of one carriage of the tramcar running on the long straight track.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010221018.XA CN111257789A (en) | 2020-03-25 | 2020-03-25 | Simulation test device of tramcar non-contact power supply system |
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| CN202010221018.XA CN111257789A (en) | 2020-03-25 | 2020-03-25 | Simulation test device of tramcar non-contact power supply system |
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| CN114545109A (en) * | 2021-12-14 | 2022-05-27 | 西南交通大学 | Comprehensive experiment platform for open type high-speed dynamic wireless power supply system |
| WO2023097759A1 (en) * | 2021-12-01 | 2023-06-08 | 中车长春轨道客车股份有限公司 | Inductive power supply test bench |
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