CN115664054B - Vehicle-ground multi-load synchronous wireless power supply system based on relay polar plate - Google Patents
Vehicle-ground multi-load synchronous wireless power supply system based on relay polar plate Download PDFInfo
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- 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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- 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
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Abstract
The invention discloses a vehicle-ground multi-load synchronous wireless power supply system based on a relay polar plate, which relates to the field of vehicle-ground multi-load power supply and comprises a vehicle head transmitting end, a ground relay end, a ground receiving end and a carriage receiving end, wherein the vehicle head transmitting end and the ground relay end form coupling to provide electric energy; the ground relay terminal transmits alternating current to the ground receiving terminal and is coupled with the carriage receiving terminal to provide electric energy; the ground receiving end converts the alternating current into direct current and supplies power to a ground load; the carriage receiving end converts the alternating current into direct current to supply power for a carriage end load; the train head transmitting end, the ground relay end, the ground receiving end and the carriage receiving end integrally form a CL-LCLC-CL type compensation network. The invention can synchronously transmit the electric energy of the head transmitting end to the monitoring equipment of the ground receiving end and the carriage receiving end in a wireless mode, provides stable and reliable electric energy and enables the whole system to be in a resonance state.
Description
Technical Field
The invention relates to the field of vehicle-ground multi-load power supply, in particular to a vehicle-ground multi-load synchronous wireless power supply system based on a relay polar plate.
Background
In order to ensure the safe operation of the freight train of the long-reach main railway, basic monitoring equipment such as a sensor is required to be arranged in the passive carriage to monitor the vibration condition, the temperature, the air pressure and other parameters of the passive carriage in real time, and the sensor is also required to be arranged on the ground side of the steel rail to monitor the temperature, the pressure and other health states of the steel rail. The important premise for normal operation of online monitoring equipment, whether in a car or on the ground side, is continuous and stable power supply.
The traditional sensor power supply mode leads out line power supply from a power supply (commercial power/battery), has the outstanding problems of easy damage, difficult maintenance and the like, and seriously restricts the popularization and application of the railway infrastructure monitoring system. And the electric energy of the train locomotive is transmitted to each passive carriage in a wireless mode by applying a multi-load CPT technology, so that continuous and stable electric energy can be provided for online monitoring equipment in the passive carriages. A Capacitive wireless Power Transmission (CPT) is a non-contact Power supply method using an alternating electric field as a Transmission medium, and currently existing multi-load CPT systems are mainly classified into a cascade multi-load CPT system and a parallel multi-load CPT system. The structure of the cascaded multi-load CPT system is shown in figure 1,T X0 it is shown that the firing mechanism,R T1 ~R NT to representNA relay mechanism for controlling the operation of the relay device,U DC is a direct current power supply, the inverter is an inverter,ACis an alternating current power supply and is characterized in that,DCis a direct-current power supply and is provided with a power supply,C 1 ~ C （N+ ）1 、C p1 ~ C Np（+1） andC S1 ~ C SN in order to compensate for the capacitance,L 1 ~ L N（+1） 、L P1 ~ L NP（+1） andL S1 ~ L SN to compensate for inductance, C M1 And C M2 For the sake of equivalent mutual capacitance, U OUT1 ~ U OUTN in order to load the equivalent ac output voltage,R L1 ~R LN for loads, the cascaded multi-load CPT system requires a plurality of repeater units, each of which is responsible for picking up power and powering the load connected thereto, while delivering power to subsequent repeater units. The relay unit transfers the electric energy backward step by step, which causes large system loss, especially when a relay unit in the middle sendsIn the event of a fault, the power transmission will thus be interrupted and the following loads will not be able to obtain a constant and stable power. As shown in fig. 2, the structure of the parallel multi-Load CPT system is shown, where Inverter is an Inverter, primary Compensation is a transmitting terminal Compensation network, capacitive Coupling is a Coupling mechanism, secondary Compensation is a receiving terminal Compensation network, rectifier is a Rectifier, load is a Load,V in for the direct current input voltage, the parallel multi-load CPT system adopts multiple receiving terminals to obtain electric energy from a large transmitting terminal (or multiple transmitting terminals), so that transmitting terminals need to arrange transmitting plates with a large enough area or transmitting plates with the same number as receiving plates, resulting in an overlarge system volume and higher cost.
In addition, if the existing cascade multi-load CPT system and parallel multi-load CPT system are applied to wireless power supply of railway infrastructure, the power supply can only be simultaneously realized for one of the on-line monitoring equipment of the passive carriage or the ground rail side, but synchronous wireless power supply of the on-board monitoring equipment cannot be realized.
Disclosure of Invention
In order to overcome the defects in the prior art, the vehicle-ground multi-load synchronous wireless power supply system based on the relay polar plate can simultaneously and synchronously transmit the electric energy of the vehicle head transmitting end to the monitoring equipment of the ground receiving end and the carriage receiving end in a wireless mode, and provides stable and reliable electric energy.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that:
a vehicle-ground multi-load synchronous wireless power supply system based on a relay polar plate comprises a vehicle head transmitting end, a ground relay end, a ground receiving end and a carriage receiving end, wherein the vehicle head transmitting end is used for converting direct current into alternating current and providing electric energy for coupling between the vehicle head transmitting end and the ground relay end; the ground relay terminal is used for forming coupling with the locomotive transmitting terminal to receive electric energy, transmitting alternating current to the ground receiving terminal and forming coupling with the carriage receiving terminal to provide electric energy; the ground receiving end is used for converting the alternating current of the ground relay end into direct current and supplying power to a ground load; the carriage receiving end is used for forming coupling with the ground relay end to receive electric energy and converting alternating current into direct current to supply power to a carriage end load;
the train head transmitting end, the ground relay end, the ground receiving end and the carriage receiving end integrally form a CL-LCLC-CL type compensation network, and the train head transmitting end, the ground relay end and the carriage receiving end form a CL-L-CL type compensation network which is used for realizing constant voltage output of each load of the ground receiving end and the carriage receiving end and enabling the whole system to be in a resonance state.
Furthermore, the head transmitting end comprises a direct current power supply, a high-frequency inverter, a transmitting end compensation network unit and a transmitting polar plate which are connected in series; the train head comprises a train body, a direct current power supply, a high-frequency inverter, a transmitting end compensation network unit, a transmitting pole plate, an insulating medium and a train head, wherein the direct current power supply is used for generating direct current, the high-frequency inverter is used for converting the direct current generated by the direct current power supply into alternating current, the transmitting end compensation network unit is used for keeping the voltage between a ground relay end and a ground receiving end constant, the transmitting pole plate is installed on the outer side of the bottom of the train head, the transmitting pole plate is separated from the train body through the insulating medium, and is used for receiving the alternating current passing through the transmitting end compensation network unit and forming coupling transmission alternating current with the ground relay end.
Furthermore, the ground relay terminal comprises a relay polar plate and a relay terminal compensation network unit which are connected in series, wherein the relay polar plate is arranged on a sleeper between rails and forms a grounding loop with the rails through the relay terminal compensation network unit; the relay pole plate is used for forming a coupling construction alternating current transmission channel with the vehicle head transmitting end, forming a coupling construction alternating current transmission channel with the carriage receiving end and transmitting alternating current to the ground receiving end, and the relay end compensation network unit is used for enabling the whole system to be in a resonance state.
Further, the ground receiving end comprises a ground receiving end compensation network unit, a ground receiving end rectifier and a ground load which are connected in series; the ground receiving end compensation network unit is used for keeping the output voltage of the ground load constant, and the ground receiving end rectifier is used for converting alternating current passing through the ground receiving end compensation network unit into direct current and then supplying power to the ground load.
Furthermore, the carriage receiving end comprises a receiving polar plate, a carriage receiving end compensation network unit, a carriage receiving end rectifier and a carriage load which are connected in series; the receiving polar plate is arranged on the outer side of the bottom of the train head, the receiving polar plate is separated from the train body by an insulating medium and used for forming a coupling structure with a ground relay end to construct an alternating current transmission channel, the carriage receiving end compensation network unit is used for keeping the carriage load output voltage constant, and the carriage receiving end rectifier is used for converting alternating current passing through the carriage receiving end compensation network unit into direct current and then supplying power to the carriage load.
Further, the conditions for realizing the constant voltage output of each load at the ground receiving end of the invention are as follows:
wherein:U doutm for ground receiving end loadm 
The ac output voltage of (a) is,U in for the purpose of inputting the voltage to the system,
，C p the capacitance is compensated for at the transmitting end,C p1 is the coupling capacitance between the transmitting plate and the relay plate,
，C Dm the capacitance is compensated for at the receiving end of the ground,C dm and compensating the capacitance for the ground receiving end.
Further, the conditions for realizing the constant voltage output of each load at the receiving end of the carriage are as follows:
wherein:U doutn for the load at the receiving end of the carriagenThe ac output voltage of (a) is,U in for the purpose of inputting the voltage to the system,
，C p the capacitance is compensated for at the transmitting end,C p1 is the coupling capacitance between the transmitting plate and the relay plate,
,C n the capacitance is compensated for at the receiving end of the carriage,C rn and compensating the capacitance for the receiving end of the carriage.
Further, the present invention makes the whole system present the resonance state condition:
wherein:L S in order to compensate the inductance of the relay terminal,
,C P the capacitance is compensated for at the transmitting end,C P1 is the coupling capacitance between the transmitting plate and the relay plate,L P the inductance is compensated for at the transmitting end,
in order to be the operating frequency of the system,
，C dm the capacitance is compensated for at the receiving end of the ground,
，U s in order to output a voltage to the transmitting terminal,U doutm for ground receiving end loadmThe ac output voltage of (a) is,
，C rn the capacitance is compensated for at the receiving end of the carriage,
，U routn for loading at the receiving end of the carriagenThe ac output voltage of (a) is,C S and compensating the capacitance for the relay terminal.
The beneficial effects of the invention are as follows:
(1) The invention can realize that the electric energy of the head transmitting terminal is synchronously transmitted to the monitoring equipment of the ground receiving terminal and the monitoring equipment of the carriage receiving terminal in a wireless mode, thereby synchronously providing stable and reliable electric energy for the ground receiving terminal and the online monitoring equipment of the carriage receiving terminal;
(2) The vehicle head transmitting end only adopts one transmitting polar plate, the ground relay end only adopts one relay polar plate, and the ground receiving end does not need to be paved with a power bus, so that the structure is simple and the cost is economic;
(3) In the invention, all loads of the system are in parallel connection on a circuit, so that all loads have better output independence and higher power supply reliability;
(4) The train head transmitting end and the train carriage receiving end both adopt CL type compensation topologies, and the compensation topology of the ground relay end adopts relay end compensation inductance to realize resonance of the whole system. And the ground receiving end adopts CLC type compensation topology, and the added capacitor is used for equivalently simulating the coupling between the relay polar plate and the receiving polar plate, so that the receiving end of the system compartment and the ground receiving end are completely symmetrically connected in parallel, and independent constant voltage output can be realized among all loads of the system.
Drawings
Fig. 1 is a block diagram of a cascaded multi-load CPT system;
fig. 2 is a structural diagram of a parallel multi-load CPT system;
FIG. 3 is a block diagram of a vehicle-ground multi-load synchronous wireless power supply system based on a relay polar plate;
FIG. 4 is a diagram of an equivalent coupling model of a vehicle-ground multi-load synchronous wireless power supply system based on a relay plate;
FIG. 5 is a view of an LCC compensated topology;
FIG. 6 is a CLC compensation topology block diagram;
FIG. 7 is a structural diagram of a vehicle-ground multi-load synchronous wireless power supply system based on a relay plate after a compensation network structure is added;
FIG. 8 is a diagram of the voltage and current waveforms at the output side of the inverter;
fig. 9 is a graph of output voltage waveforms at different load terminals.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
As shown in fig. 3, the vehicle-ground multi-load synchronous wireless power supply system based on the relay polar plate of the present invention includes a vehicle head transmitting end, a ground relay end, a ground receiving end and a carriage receiving end, wherein the vehicle head transmitting end is configured to convert direct current into alternating current and provide electric energy for coupling between the vehicle head transmitting end and the ground relay end; the ground relay terminal is used for forming coupling with the locomotive emitter terminal to receive electric energy, transmitting alternating current to the ground receiver terminal and forming coupling with the carriage receiver terminal to provide electric energy; the ground receiving end is used for converting the alternating current of the ground relay end into direct current and supplying power to a ground load; and the carriage receiving end is used for forming coupling with the ground relay end to receive electric energy and converting the alternating current into direct current to supply power to a carriage end load.
In an optional embodiment of the present invention, the vehicle head transmitting end includes a dc power supply, a high frequency inverter, a transmitting end compensation network unit and a transmitting polar plate connected in series; the train head comprises a train body, a direct current power supply, a high-frequency inverter, a transmitting end compensation network unit, a transmitting pole plate, an insulating medium and a train head, wherein the direct current power supply is used for generating direct current, the high-frequency inverter is used for converting the direct current generated by the direct current power supply into alternating current, the transmitting end compensation network unit is used for keeping the voltage between a ground relay end and a ground receiving end constant, the transmitting pole plate is installed on the outer side of the bottom of the train head, the transmitting pole plate is separated from the train body through the insulating medium, and is used for receiving the alternating current passing through the transmitting end compensation network unit and forming coupling transmission alternating current with the ground relay end.
The invention uses the wire to connect the transmitting pole plate with the transmitting terminal compensation network unit, the high frequency inverter and the direct current power supply, the high frequency alternating current generated by the direct current power supply and the high frequency inverter is transmitted to the ground relay terminal by the transmitting pole plate after passing through the transmitting terminal compensation network unit.
In an optional embodiment of the present invention, the ground relay comprises a relay plate and a relay compensation network unit connected in series, the relay plate is mounted on a sleeper between rails, and forms a ground loop with the rails through the relay compensation network unit; the relay pole plate is used for forming a coupling construction alternating current transmission channel with the head transmitting end, forming a coupling construction alternating current transmission channel with the carriage receiving end and transmitting alternating current to the ground receiving end, and the relay end compensation network unit is used for enabling the whole system to be in a resonance state.
In an optional embodiment of the present invention, the ground receiving end comprises a ground receiving end compensation network unit, a ground receiving end rectifier and a ground load connected in series; the ground receiving end compensation network unit is used for keeping the output voltage of the ground load constant, and the ground receiving end rectifier is used for converting alternating current passing through the ground receiving end compensation network unit into direct current and then supplying power to the ground load.
The invention uses the lead to connect the relay polar plate, the steel rail and the ground load, directly converts the alternating current energy on the relay polar plate into direct current through the ground receiving end rectifier after passing through the ground receiving end compensation network unit, and supplies power for the ground load.
In an optional embodiment of the present invention, the car receiving end comprises a receiving pole plate, a car receiving end compensation network unit, a car receiving end rectifier and a car load connected in series; the receiving pole plate is arranged on the outer side of the bottom of the train head, the receiving pole plate is separated from the train body by an insulating medium and is used for forming a coupling structure with the ground relay end to form an alternating current transmission channel, the carriage receiving end compensation network unit is used for keeping the carriage load output voltage constant, and the carriage receiving end rectifier is used for converting alternating current passing through the carriage receiving end compensation network unit into direct current and then supplying power to the carriage load.
In an optional embodiment of the present invention, the train head transmitting end, the ground relay end, the ground receiving end and the carriage receiving end integrally form a "CL-LCLC-CL" type compensation network, and the train head transmitting end, the ground relay end and the carriage receiving end form a "CL-L-CL" type compensation network, so as to achieve constant voltage output of each load of the ground receiving end and the carriage receiving end and make the whole system present a resonance state.
The invention adopts CLC type compensation topological structure as a whole, but the train head transmitting end and the carriage receiving end are coupled with the relay polar plate and can be used as compensation capacitors, so that the train head transmitting end and the carriage receiving end both adopt CL type compensation topological structure which omits one compensation capacitor, and the ground receiving end adopts CLC type compensation topological structure. Compared with the carriage receiving end, the ground receiving end is additionally provided with the compensation capacitor to equivalently simulate the coupling formed between the relay polar plate and the receiving polar plate, so that the carriage receiving end and the ground receiving end are completely symmetrically connected in parallel. The compensation topology between the relay polar plates adopts a relay end compensation inductorL s To achieve resonance of the entire system. The structure of the vehicle-ground multi-load synchronous wireless power supply system after the compensation topological structure is added into the figure 4 is shown in figure 7, whereinU 0 Is a direct-current power supply and is provided with a DC power supply,L p is a compensation inductance of a head transmitting end,C p is a compensation capacitor at the transmitting end of the locomotive,C p1 is the coupling capacitance formed between the transmitting plate and the relay plate,C r1 ~ C rN between the receiving polar plate and the relay polar plateThe coupling capacitance is formed by the coupling capacitor,C s is a coupling capacitance of the ground relay terminal,C 1 ~ C N is a compensation capacitor at the receiving end of the carriage,L 1 ~ L N is the compensation inductance at the receiving end of the carriage,R 1 ~R N is the load at the receiving end of the car,C d1 ~ C dM is a first compensation capacitor at the receiving end of the ground,C D1 ~ C DM is a second compensation capacitor at the ground receiving end,L d1 ~ L dM is the compensation inductance of the ground receiving end,r 1 ~r M is the load at the ground receiving end. Direct current power supplyU 0 The generated direct current is converted into alternating current after passing through a high-frequency inverter, then coupling is formed between the transmitting polar plate and the relay polar plate, and high-frequency alternating current electric energy is transmitted to a ground relay end through the transmitting polar plate, the ground receiving end receives the alternating current from the relay polar plate and supplies power to a load after being rectified by a ground receiving end rectifier, a receiving polar plate of a carriage load end forms coupling with the relay polar plate, and then the high-frequency alternating current electric energy is transmitted to a carriage receiving end through the relay polar plate, and the alternating current supplies power to a carriage load after being rectified by a carriage receiving end rectifier.
In an alternative embodiment of the present invention, there are two topologies for implementing constant voltage output, which are the LCL type compensation topology and the CLC type compensation topology, respectively, where the LCL type compensation topology is as shown in fig. 5 when the input voltage is appliedU in When constant, realize the output voltage at the two ends of the load ZU out The conditions of constant voltage output are as follows:
system output voltageU out And an input voltageU in The ratio of (A) to (B) is as follows:
CLC type compensation topology is shown in FIG. 6 when input voltageU in When constant, realize the output voltage at the two ends of the load ZU out The conditions for constant voltage output are:
system output voltageU out And an input voltageU in The ratio of (A) to (B) is as follows:
in an alternative embodiment of the invention, the voltage is output by the systemU out And an input voltageU in The ratio of (A) to (B) can obtain the output voltage of the transmitting terminalU s Load on ground receiving endmAc output voltage ofU doutm Are all constant voltages:
therefore, the conditions for the constant voltage output of each load at the ground receiving end are as follows:
wherein:U doutm for ground receiving end loadm 
Of (2)The output voltage of the current is measured,U in for the purpose of inputting the voltage to the system,
，C p the capacitance is compensated for at the transmitting end,C p1 is the coupling capacitance between the transmitting plate and the relay plate,
，C Dm the capacitance is compensated for at the receiving end of the ground,C dm and compensating the capacitance for the ground receiving end.
In an alternative embodiment of the invention, the voltage U is output by the system out And an input voltage U in The ratio of the voltage to the voltage can be obtained s AC output voltage U of load n at receiving end of carriage doutn Are all constant voltages:
therefore, the conditions for realizing the constant voltage output of each load at the receiving end of the carriage are as follows:
wherein:U doutn for loading at the receiving end of the carriagenThe ac output voltage of (a) is,U in for the purpose of inputting the voltage to the system,
，C p the capacitance is compensated for at the transmitting end,C p1 is the coupling capacitance between the transmitting plate and the relay plate,
,C n the capacitance is compensated for at the receiving end of the carriage,C rn and compensating the capacitance for the receiving end of the carriage.
In an alternative embodiment of the present invention, the present invention provides that the conditions for the entire system to assume the resonant state are:
wherein:L S the inductance is compensated for at the relay terminal,
,C P the capacitance is compensated for at the transmitting end,C P1 is the coupling capacitance between the transmitting plate and the relay plate,L P the inductance is compensated for at the transmitting end,
is the frequency at which the system is operating,
，C dm the capacitance is compensated for at the receiving end of the ground,
，U s in order to output a voltage to the transmitting terminal,U doutm for ground receiving end loadmThe ac output voltage of (a) is,
，C rn the capacitance is compensated for at the receiving end of the carriage,
，U routn for loading at the receiving end of the carriagenThe ac output voltage of (a) is,C S the capacitance is compensated for the relay.
As shown in fig. 8, the abscissa is time, and the ordinate is current and voltage, respectively, the invention obtains a waveform diagram of the output voltage and current of the high-frequency inverter at the vehicle head transmitting end through experiments, and it can be known from the diagram that the whole system is in a resonance state under the combined action of the vehicle head transmitting end compensation network unit, the ground receiving end compensation network unit, the carriage receiving end compensation network unit and the ground relay end compensation inductor.
As shown in fig. 9, the abscissa is time, the ordinate is voltage, and the output voltage waveform diagrams of a plurality of load ends of the system are measured through experiments, so that the invention verifies that the vehicle-ground multi-load synchronous wireless power supply system based on the relay plates can realize independent constant voltage output among the loads, can synchronously provide stable and reliable electric energy for online monitoring equipment at a ground receiving end and a carriage receiving end at the same time, and enables the loads to have good output independence.
It will be appreciated by those of ordinary skill in the art that the embodiments described herein are intended to assist the reader in understanding the principles of the invention and are to be construed as being without limitation to such specifically recited embodiments and examples. Those skilled in the art can make various other specific changes and combinations based on the teachings of the present invention without departing from the spirit of the invention, and these changes and combinations are within the scope of the invention.
Claims (7)
1. A vehicle-ground multi-load synchronous wireless power supply system based on a relay polar plate is characterized by comprising a vehicle head transmitting end, a ground relay end, a ground receiving end and a carriage receiving end, wherein the vehicle head transmitting end is used for converting direct current into alternating current and providing electric energy for coupling between the vehicle head transmitting end and the ground relay end; the ground relay terminal is used for forming coupling with a locomotive head transmitting end to receive electric energy, transmitting alternating current to a ground receiving end and forming coupling with a carriage receiving end to provide electric energy, the ground relay terminal comprises a relay polar plate and a relay terminal compensation network unit which are connected in series, the relay polar plate is installed on a sleeper between rails and forms a grounding loop with the rails through the relay terminal compensation network unit; the relay pole plate is used for forming a coupling construction alternating current transmission channel with the head transmitting end, forming a coupling construction alternating current transmission channel with the carriage receiving end and transmitting alternating current to the ground receiving end, and the relay end compensation network unit is used for enabling the whole system to be in a resonance state; the ground receiving end is used for converting the alternating current of the ground relay end into direct current and supplying power to a ground load; the carriage receiving end is used for forming coupling with the ground relay end to receive electric energy and converting alternating current into direct current to supply power to a carriage end load;
the train head transmitting end, the ground relay end, the ground receiving end and the carriage receiving end integrally form a CL-LCLC-CL type compensation network, and the train head transmitting end, the ground relay end and the carriage receiving end form a CL-L-CL type compensation network which is used for realizing constant voltage output of each load of the ground receiving end and the carriage receiving end and enabling the whole system to be in a resonance state.
2. The vehicle-ground multi-load synchronous wireless power supply system based on the relay polar plate is characterized in that the vehicle head transmitting end comprises a direct current power supply, a high-frequency inverter, a transmitting end compensation network unit and a transmitting polar plate which are connected in series; the train head transmission system comprises a train head, a train body, a direct current power supply, a high-frequency inverter, a transmitting end compensation network unit, a transmitting end polar plate, a train head and a train body, wherein the direct current power supply is used for generating direct current, the high-frequency inverter is used for converting the direct current generated by the direct current power supply into alternating current, the transmitting end compensation network unit is used for keeping the voltage between a ground relay end and a ground receiving end constant, the transmitting polar plate is installed on the outer side of the bottom of the train head, the transmitting polar plate is separated from the train body through an insulating medium, and the transmitting polar plate is used for receiving the alternating current passing through the transmitting end compensation network unit and forming coupling transmission alternating current with the ground relay end.
3. The vehicle-ground multi-load synchronous wireless power supply system based on the relay polar plate is characterized in that the ground receiving end comprises a ground receiving end compensation network unit, a ground receiving end rectifier and a ground load which are connected in series; the ground receiving end compensation network unit is used for keeping the output voltage of the ground load constant, and the ground receiving end rectifier is used for converting alternating current passing through the ground receiving end compensation network unit into direct current and then supplying power to the ground load.
4. The vehicle-ground multi-load synchronous wireless power supply system based on the relay polar plate is characterized in that the carriage receiving end comprises a receiving polar plate, a carriage receiving end compensation network unit, a carriage receiving end rectifier and a carriage load which are connected in series; the receiving pole plate is arranged on the outer side of the bottom of the train head, the receiving pole plate is separated from the train body by an insulating medium and is used for forming a coupling structure with the ground relay end to form an alternating current transmission channel, the carriage receiving end compensation network unit is used for keeping the carriage load output voltage constant, and the carriage receiving end rectifier is used for converting alternating current passing through the carriage receiving end compensation network unit into direct current and then supplying power to the carriage load.
5. The vehicle-ground multi-load synchronous wireless power supply system based on the relay polar plate is characterized in that the conditions of constant voltage output of each load at the ground receiving end are as follows:
wherein:U doutm for ground receiving end loadsmThe ac output voltage of (a) is,U in the input voltage of the system is the voltage,
，C p the capacitance is compensated for at the transmitting end,C p1 is the coupling capacitance between the transmitting plate and the relay plate,
，C Dm the capacitance is compensated for at the receiving end of the ground,C dm and compensating the capacitance for the ground receiving end.
6. The vehicle-ground multi-load synchronous wireless power supply system based on the relay polar plate is characterized in that the constant voltage output conditions of each load at the receiving end of the carriage are as follows:
wherein: u shape routn For loading at the receiving end of the carriagenThe ac output voltage of (a) is,U in the input voltage of the system is the voltage,
，C p the capacitance is compensated for at the transmitting end,C p1 is the coupling capacitance between the transmitting plate and the relay plate,
,C n the capacitance is compensated for at the receiving end of the carriage,C rn and compensating the capacitance for the receiving end of the carriage.
7. The vehicle-ground multi-load synchronous wireless power supply system based on the relay plate as claimed in claim 1, wherein the condition that the whole system is in a resonance state is as follows:
wherein:L S the inductance is compensated for at the relay terminal,
,C P in order to compensate the capacitance at the transmitting end,C P1 is the coupling capacitance between the transmitting plate and the relay plate,L P the inductance is compensated for at the transmitting end,
in order to be the operating frequency of the system,
，C dm the capacitance is compensated for at the receiving end of the ground,
，U s in order to output a voltage to the transmitting terminal,U doutm for ground receiving end loadmThe ac output voltage of (a) is,
，C rn the capacitance is compensated for at the receiving end of the carriage,
，U routn for loading at the receiving end of the carriagenThe ac output voltage of (a) is,C S and compensating the capacitance for the relay terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN109941128B (en) * | 2019-04-25 | 2020-12-01 | 西南交通大学 | Electric field coupling type voltage optimization method for wireless charging technology of electric automobile |
| CN110350673A (en) * | 2019-07-12 | 2019-10-18 | 江南大学 | A kind of impedance matching network optimization method of radio energy transmission system under maximal efficiency tracking |
| CN113381515B (en) * | 2021-06-30 | 2022-11-22 | 东南大学 | Power decoupling multi-load electric field coupling type wireless power transmission system |
| CN113541323B (en) * | 2021-07-21 | 2023-08-22 | 东南大学 | Multi-capacity energy transmission system with multi-constant-current output |
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| 罗成鑫 ; 丘东元 ; 张波 ; 肖文勋 ; 陈艳峰 ; .多负载无线电能传输系统.2020,(第12期),5-22. * |
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