CN110682806B - A trolleybus based on wireless charging technology and its operation control method - Google Patents
A trolleybus based on wireless charging technology and its operation control method Download PDFInfo
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- CN110682806B CN110682806B CN201910656656.1A CN201910656656A CN110682806B CN 110682806 B CN110682806 B CN 110682806B CN 201910656656 A CN201910656656 A CN 201910656656A CN 110682806 B CN110682806 B CN 110682806B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/12—Inductive energy transfer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/12—Inductive energy transfer
- B60L53/122—Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
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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
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Abstract
The invention relates to a trolley bus based on wireless charging technology, which is characterized in that wireless energy receiving terminals and underground wireless energy transmitting terminals which are matched with the wireless energy receiving terminals and are continuously laid along preset running route road signs in parallel are additionally arranged in pairs on the traditional structure, each wireless energy receiving terminal acquires wireless electric energy from an underground external power grid through each underground wireless energy transmitting terminal, and then a power electronic converter on the trolley bus converts the voltage and current of the wireless electric energy acquired from the wireless energy receiving terminals and transmits the converted voltage and current to a motor to convert the converted voltage and current into kinetic energy and finally transmits the kinetic energy to wheels; the underground external power grid is also provided with a power controller, the whole vehicle controller collects the current running information of the trolley bus and feeds the current running information back to the power controller, and the power controller regulates and controls the voltage and current of each underground wireless energy transmitting end according to the feedback information so as to finally control the trolley bus to enter different running working conditions. The invention also relates to a running control method of the trolley bus based on the wireless charging technology.
Description
Technical Field
The invention relates to the technical field of control management of a trolley bus, in particular to a trolley bus based on a wireless charging technology.
Background
A trolley bus is a public transportation vehicle on the road, which is generally powered by an overhead contact network, driven by an electric motor, and driven without depending on a fixed rail (a trolley bus is a trolley bus that is driven by electric power and runs on rails or rail tracks, and a trolley bus means no rails or rail tracks). Compared with a bus, the trolley bus has the advantages of energy conservation, environmental protection, comfort and sanitation, and compared with the trolley bus, the trolley bus has the advantages of low price, flexibility, light weight of a vehicle body and easy climbing. Common trolley buses are divided into two types, namely a common trolley bus and a double-power-source trolley bus. The common trolley bus is not provided with an auxiliary power source, and the power receiving rod of the common trolley bus loses power and stops after being separated from an overhead contact power grid, so the power receiving rod of the common trolley bus cannot be separated from the overhead contact power grid, the common trolley bus can only run according to a set route, the flexibility is poor, and under the condition of no special lane, once the common trolley bus is contacted with the power grid, accidents occur, and serious traffic jam is easily caused by stopping a large number of common trolley buses. The double-power-source trackless trolley bus provided with the power storage battery, the super capacitor and the diesel generator can temporarily realize off-line running on a road section without overhead contact with a power grid, although the double-power-source trackless trolley bus can run off-line, the off-line process of the double-power-source trackless trolley bus can only be transient and acute, but cannot be off-line running for a long time, so that when an accident occurs when the double-power-source trackless trolley bus contacts with the power grid, the double-power-source trackless trolley bus also has the condition of traffic jam caused. Especially, the trolley bus under the first-line urban public transport environment is very easy to be seriously blocked. In addition, on the aspects of planning investment and urban landscape, the trolley bus needs to be in contact with a power grid and a rectifying transformer substation, wherein the contact power grid needs to be overhead and walk above each road, a large amount of urban space is occupied, and the street clearance and the attractiveness are affected. In order to take effective connection of an aerial power grid into consideration, the requirement of the off-line distance between a receiving pole and a contact power grid of the trolley bus must be considered, the most remote distance that the trolley bus can deviate from a trolley line is 4.5 meters under the condition that the trolley bus is not off-line is generally specified by the off-line distance national standard, the trolley bus generally has no independent right of way in the running process of the trolley bus and is easily influenced by other vehicles and pedestrians, and a driver can adjust a steering wheel in the process of avoiding the other vehicles and the pedestrians but is limited by the requirement of the off-line distance of the trolley bus, so the requirement on the driving capability of the driver is high. Moreover, when the power receiving pole of the trolley bus is accidentally broken, the wire contacting with the power grid is easily hung up, and the wire may fall to the ground, so that potential safety hazards are caused.
Disclosure of Invention
The invention provides a trolley bus based on wireless charging technology, aiming at the problems that the traditional trolley bus has poor flexibility, is easy to cause traffic jam, cannot run off-line for a long time, occupies urban space due to being provided with a contact power grid and a rectifier transformer substation, affects street clearance and beauty, has overhigh requirement on drivers and is easy to cause potential safety hazard, and the like, the trolley bus introduces the wireless charging technology to provide energy for the trolley bus by arranging special wireless charging devices, namely a wireless energy receiving end and an underground wireless energy transmitting end, has simple integral structure, convenient operation and control and strong safety, can realize real-time charging while running, greatly improves charging efficiency, adopts a plurality of underground wireless energy transmitting ends which are continuously laid side by side and connected with an underground external power grid, does not need to make overhead contact with the power grid on a running path like a transmission trolley, the city headroom is maintained to be beautiful. The invention also provides a running control method of the trolley bus based on the wireless charging technology.
The technical scheme of the invention is as follows:
a trolley bus based on a wireless charging technology comprises a vehicle control unit, wheels, a planetary gear reducer, a motor and a power electronic converter which are sequentially connected, wherein the wheels, the planetary gear reducer, the motor and the power electronic converter are all arranged in pairs, the vehicle control unit controls the planetary gear reducer, the motor and the power electronic converter according to real-time information of the trolley bus, the trolley bus further comprises wireless energy receiving ends which are arranged in pairs and respectively connected with the power electronic converter, underground wireless energy transmitting ends which are matched with the wireless energy receiving ends and are continuously laid side by side along a preset driving route road sign, the underground wireless energy transmitting ends are all connected with an underground external power grid, the wireless energy receiving ends acquire wireless energy from the underground external power grid through the underground wireless energy transmitting ends, and the power electronic converter converts voltage current of the wireless energy acquired from the wireless energy receiving ends and then transmits the converted voltage current to the underground external power grid The kinetic energy is transmitted to the motor and converted into kinetic energy, and the kinetic energy is transmitted to wheels through the planetary gear reducer after being output by the motor, so that the trolley bus runs along a road sign of a preset running route;
the underground external power grid is further provided with a power controller, wireless communication is carried out between the power controller and the whole vehicle controller, the whole vehicle controller collects current operation information of the trolley bus and feeds the current operation information back to the power controller, and the power controller regulates and controls voltage and current of the underground wireless energy transmitting ends according to the feedback information so as to respectively regulate and control wireless energy received by the wireless energy receiving ends and further respectively convert the wireless energy into kinetic energy through the motor and transmit the kinetic energy to the wheels so as to control the trolley bus to enter different running working conditions.
Preferably, each underground wireless energy transmitting end is connected with a transformer, each transformer is also located underground, and each underground wireless energy transmitting end is independently regulated and controlled by the power controller through the transformer connected with each underground wireless energy transmitting end.
Preferably, each underground wireless energy transmitting end adopts a transmitting coil, and the transmitting coil is square, rectangular or circular; the wireless energy receiving end adopts a receiving coil, and the transmitting coil and the receiving coil realize the receiving and transmitting of wireless energy based on a magnetic coupling resonance technology.
Preferably, the trolley bus based on the wireless charging technology further comprises a standby power supply, the standby power supply stores redundant electric energy during wireless charging, and the standby power supply is connected with each vehicle-mounted component and used for supplying power to each component in a standby mode when an underground external power grid fails or fails.
Preferably, the vehicle control unit collects current operation information of the trolley bus, including but not limited to vehicle position information, current vehicle speed, running time information, current road condition and current running demand information, the vehicle position information describes the current underground wireless energy transmitting terminal and coordinate information of the trolley bus, and the current vehicle speed and the running time information describe the number of the underground wireless energy transmitting terminals the trolley bus is about to run through;
and/or, the different driving conditions of the trolley bus comprise but are not limited to acceleration driving, deceleration driving, differential steering driving and brake parking.
A trolley bus operation control method based on wireless charging technology is applied to the operation control process of a trolley bus comprising a whole vehicle controller, wheels, a planetary gear reducer, a motor and a power electronic converter which are connected in sequence, the wheels, the planetary gear reducer, the motor and the power electronic converter are all arranged in pairs, the whole vehicle controller controls the planetary gear reducer, the motor and the power electronic converter according to the real-time information of the trolley bus, wireless energy receiving ends connected with the power electronic converter are arranged in pairs on the trolley bus, underground wireless energy transmitting ends matched with the wireless energy receiving ends are continuously laid side by side under a road sign along a preset driving route, the underground wireless energy transmitting ends are all connected with an underground external power grid, and the wireless energy receiving ends acquire wireless electric energy from the underground external power grid through the underground wireless energy transmitting ends, the voltage and current of the wireless energy obtained from the wireless energy receiving end are converted by a power electronic converter and then transmitted to a motor to be converted into kinetic energy, and the kinetic energy is output by the motor and then transmitted to wheels through a planetary gear reducer, so that the trolley bus runs along a road sign of a preset running route; the method comprises the steps that a power controller is arranged on an underground external power grid, wireless communication is carried out between the power controller and a whole vehicle controller, when the trolley bus runs, the whole vehicle controller collects current running information of the trolley bus and feeds the current running information back to the power controller, then the power controller regulates and controls voltage and current of each underground wireless energy transmitting end according to the feedback information so as to respectively regulate and control wireless energy received by each wireless energy receiving end, and then the wireless energy is converted into kinetic energy by a motor and transmitted to each wheel, and then the trolley bus is controlled to enter different running working conditions.
Preferably, each underground wireless energy transmitting end is connected with a transformer which is also located underground, and each underground wireless energy transmitting end is independently regulated and controlled by the power controller through the transformer connected with each underground wireless energy transmitting end.
Preferably, each underground wireless energy transmitting end adopts a transmitting coil, and the transmitting coil is square, rectangular or circular; the wireless energy receiving end adopts a receiving coil, and the transmitting coil and the receiving coil realize the receiving and transmitting of wireless energy based on a magnetic coupling resonance technology.
Preferably, the operation control method of the trolley bus based on the wireless charging technology further adopts a standby power supply to store redundant electric energy during wireless charging, and the standby power supply is connected with each vehicle-mounted component and is used for supplying power to each component in a standby mode when an underground external power grid is powered off or fails.
Preferably, the vehicle control unit collects current operation information of the trolley bus, including but not limited to vehicle position information, current vehicle speed, running time information, current road condition and current running demand information, the vehicle position information describes the current underground wireless energy transmitting terminal and coordinate information of the trolley bus, and the current vehicle speed and the running time information describe the number of the underground wireless energy transmitting terminals the trolley bus is about to run through;
and/or, the different driving conditions of the trolley bus comprise but are not limited to acceleration driving, deceleration driving, differential steering driving and brake parking.
The invention has the following technical effects:
the invention relates to a trolley bus based on wireless charging technology, which adopts a wireless energy receiving end and an underground wireless energy transmitting end to realize wireless energy receiving and transmitting, introduces the wireless charging technology to provide energy for the trolley bus, can realize real-time charging while driving, greatly improves charging efficiency, and in addition, the transmitting end of a wireless charging device adopts a plurality of underground wireless energy transmitting ends which are continuously laid side by side and connected with an underground external power grid, namely, the underground arrangement corresponding to the road sign of a preset driving line is adopted, changes the arrangement mode that the traditional trolley bus needs to erect a contact power grid and install a rectifier transformer substation in the air, namely, does not need to make overhead contact with the power grid on the driving path like a transmission trolley, maintains the clear and beautiful appearance of a city, and completely removes the dependence of a common pure electric vehicle on a fixed charging facility through the technical thought of arranging charging equipment underground along the preset driving line, the adaptability of the trolley bus is improved, the underground external power grid is less prone to damage and damage, the safety is improved, in addition, the underground wireless energy transmitting end is continuously laid along the road sign of the preset running line, the trolley bus in running can be continuously charged, traffic jam caused by the fact that the trolley bus stops running without electricity is avoided, and the practicability is very high; in addition, the underground external power grid is also provided with a power controller, the power controller is matched with a vehicle control unit on the vehicle to work, and the power controller regulates and controls the voltage and current of each underground wireless energy transmitting end according to the feedback information of the vehicle control unit so as to respectively regulate and control the magnitude of the wireless energy received by each wireless energy receiving end and further respectively convert the wireless energy into kinetic energy through a motor and transmit the kinetic energy to each wheel, and then the trackless trolley is controlled to enter different running working conditions, for example, when the vehicle needs to turn left, the power controller is used for controlling the voltage and current of the voltage of the left underground wireless energy transmitting end to be smaller than the voltage and current of the voltage of the right underground wireless energy transmitting end, namely controlling the wireless energy received by the left wireless energy receiving end to be smaller than the wireless energy received by the left wireless energy receiving, thereby realize the differential left turn, utilize the electric control technique of external electric wire netting in underground, can effectively transfer the operating mode of car, just can support the motor by the voltage electric current physical parameter who receives and realize the speed governing promptly, thereby control the vehicle and get into different operating modes of traveling, consequently, do not need the driver to control the vehicle, only need plan the route of traveling in advance, predetermine the route road sign of traveling, then can realize the unmanned driving of vehicle to a certain extent after giving electric controller control command, and this design need not to install traditional steering control device on the car, brake control device etc. effectively realize the vehicle lightweight, and can undertake bigger load.
The invention also relates to a running control method of the trolley bus based on the wireless charging technology, which corresponds to the trolley bus based on the wireless charging technology, namely, the method for realizing the running control is understood, the method ensures that the trolley bus can carry out wireless charging in real time in the running process along the preset running route by arranging paired wireless energy receiving ends on the trolley bus and continuously laying underground wireless energy transmitting ends in parallel under the road sign of the preset running route, and each underground wireless energy transmitting end is connected with an underground external power grid, on one hand, the charging efficiency is greatly improved, and simultaneously, the continuous wireless charging can be carried out, thereby avoiding the condition that the trolley bus stops a large amount of traffic jam caused by the running, on the other hand, the trolley bus does not need to be in overhead contact with the power grid on the running route like a transmission trolley, the urban clearance is beautiful, and the underground external power grid is more difficult to be damaged, the overall safety is greatly improved; in addition, the underground power controller is used for regulating and controlling voltage and current of underground wireless energy transmitting ends according to feedback information of the whole vehicle controller so as to respectively regulate and control the size of wireless energy received by each wireless energy receiving end and further respectively convert the wireless energy into kinetic energy through the motor and transmit the kinetic energy to each wheel and then control the trolley bus to enter different running working conditions, so that a driver does not need to control the vehicle, only a running route road sign needs to be planned in advance, then unmanned driving of the vehicle can be realized to a certain extent after a control instruction is given to the power controller, the working condition of the vehicle can be effectively regulated, the design does not need to install a traditional steering control device, a traditional braking control device and the like on the vehicle, the light weight of the vehicle is effectively realized, and larger load can be borne.
Drawings
FIG. 1: the invention discloses a trackless trolley based on a wireless charging technology and a structural schematic diagram of a wireless charging device thereof.
FIG. 2: the invention relates to a schematic diagram of an underground wireless energy transmitting terminal structure in a wireless charging device of a trolley bus based on a wireless charging technology.
FIGS. 3a-3 b: the invention relates to a principle schematic diagram and a structural schematic diagram of a magnetic coupling resonance circuit of a wireless charging device of a trolley bus based on a wireless charging technology.
FIG. 4: the invention is a preferable flow chart of the operation control method of the trolley bus based on the wireless charging technology.
Detailed Description
The present invention will be further described in detail with reference to the accompanying drawings.
The invention relates to a trolley bus based on wireless charging technology, as shown in a structural schematic diagram of figure 1, comprising a whole vehicle controller, wheels, a planetary gear reducer, a motor and a power electronic converter which are connected in sequence, wherein the wheels, the planetary gear reducer, the motor and the power electronic converter are all arranged in pairs, the whole vehicle controller controls the planetary gear reducer, the motor and the power electronic converter according to real-time information of the trolley bus, the design is characterized in that the trolley bus also comprises wireless energy receiving terminals which are arranged in pairs and respectively connected with the power electronic converter and underground wireless energy transmitting terminals which are matched with the wireless energy receiving terminals and are continuously laid side by side along a preset driving road sign, the wireless energy receiving terminals are positioned in the vehicle, namely positioned on the ground, and as the hatching in the figure represents the ground level, the whole trolley bus body is located above the ground level, fig. 1 shows two underground wireless energy transmitting ends which are located below the ground level indicated by the hatched lines, and meanwhile, the structural schematic diagram of the underground wireless energy transmitting ends in the wireless charging device of fig. 2 shows the setting condition of the underground wireless energy transmitting ends more clearly and clearly, as shown in the figure, two rows of underground wireless energy transmitting ends laid side by side continuously are along the preset driving route road sign (the preset driving route road sign can be set in the whole distance or in the whole distance at intervals, specifically according to the actual application scene condition, only one section of L-shaped route is taken as an example in fig. 2, further, the two rows of underground wireless energy transmitting ends laid side by side continuously are set by taking the central line of the road/preset driving route through which the trolley bus runs as the central line, the distance between two underground wireless energy transmitting ends in the same row is equal to the wheel distance of the trolley bus, the two underground wireless energy transmitting ends can be completely ensured to correspond to two wireless energy receiving ends positioned on the left and the right of a trolley bus body, each underground wireless energy transmitting end is connected with an underground external power grid, each wireless energy receiving end acquires wireless electric energy from the underground external power grid through each underground wireless energy transmitting end, a power electronic converter in the figure 1 converts voltage and current of the wireless electric energy acquired from the wireless energy receiving ends and transmits the converted voltage and current to a motor to convert the converted voltage and current into kinetic energy, and the motor outputs the kinetic energy and then transmits the kinetic energy to wheels through a planetary gear reducer, so that the trolley bus can run along a preset running route; as shown in fig. 2, the underground external power grid is further provided with a power controller, the power controller is in wireless communication with the vehicle controller, the vehicle controller collects current operation information of the trolley bus and feeds the current operation information back to the power controller, the power controller regulates and controls voltage and current of each underground wireless energy transmitting end according to the feedback information, specifically, preferably, each underground wireless energy transmitting end is connected with a transformer, each transformer is also located underground, each underground wireless energy transmitting end independently receives the regulation and control of the power controller through the transformer connected with each underground wireless energy transmitting end, when a certain underground wireless energy transmitting end fails, other underground wireless energy transmitting ends still work normally without interference, and the power controller can still work by regulating and controlling the underground wireless energy transmitting end adjacent to the failure point, so as to ensure system stability, the invention adopts the wireless energy receiving end and the underground wireless energy transmitting end to realize wireless energy receiving and transmitting, introduces the wireless charging technology to provide energy for the trolley bus, can realize real-time charging while driving, greatly improves the charging efficiency, promotes effective driving range, in addition, the transmitting end of the wireless charging device adopts a plurality of underground wireless energy transmitting ends which are connected with an underground external power grid and are continuously laid side by side, namely, underground arrangement corresponding to the preset driving circuit road sign, changes the arrangement mode that the traditional trolley bus must be arranged in the air to be in contact with the power grid and install a rectifier transformer substation, the dependence of a common pure electric automobile on fixed charging infrastructure is completely eliminated by arranging a charging device underground along a preset running line, the adaptability of the trolley bus is improved, the underground external power grid is less prone to damage and damage, the safety is also improved, in addition, because of the underground wireless energy transmitting end continuously laid along the preset running line, the trolley bus in running can be continuously charged, traffic jam caused by the fact that the trolley bus is not electrically stopped is avoided, and the practicability is very high; in addition, the underground external power grid is also provided with a power controller, the power controller is matched with a vehicle control unit on the vehicle to work, and the power controller regulates and controls the voltage and current of each underground wireless energy transmitting end according to the feedback information of the vehicle control unit so as to respectively regulate and control the magnitude of the wireless energy received by each wireless energy receiving end and further respectively convert the wireless energy into kinetic energy through a motor and transmit the kinetic energy to each wheel, and then the trackless trolley is controlled to enter different running working conditions, for example, when the vehicle needs to turn left, the power controller is used for controlling the voltage and current of the voltage of the left underground wireless energy transmitting end to be smaller than the voltage and current of the voltage of the right underground wireless energy transmitting end, namely controlling the wireless energy received by the left wireless energy receiving end to be smaller than the wireless energy received by the left wireless energy receiving, therefore, the differential left turn is realized, the electric control technology of the underground external power grid is utilized, the working condition of the vehicle can be effectively adjusted, namely, the motor can be resisted to realize speed regulation by the received voltage and current physical parameters, so that the vehicle is controlled to enter different running working conditions, a driver does not need to control the vehicle, only a running path is planned in advance, a running route road sign is preset, and then the unmanned driving of the vehicle can be realized to a certain extent after a control instruction is given to an electric controller, in addition, the design does not need to install a traditional steering control device, a brake control device and the like on the vehicle, the light weight of the vehicle is effectively realized, larger load can be born, the whole energy source is supplied by the underground external power grid, the fancy fuel combustion is reduced, the zero emission is really realized, the pollution is reduced, the environmental protection is facilitated, and the trackless electric vehicle provided by the invention, after one-time investment, the method basically does not need much maintenance, namely the maintenance cost is relatively low, and the economic cost is saved.
Preferably, each underground wireless energy transmitting end adopts a transmitting coil, the transmitting coil is set to be square, rectangular or circular, each underground wireless energy transmitting end in fig. 2 preferably adopts a circular transmitting coil with the same size, and each transmitting coil is independently regulated and controlled by the power controller through a transformer connected with each transmitting coil, namely, the power controller regulates the voltage of each transmitting coil through a transformer of each transmitting coil (the voltage provided by an underground external power grid to each transmitting coil dynamically changes along with time), so that each transmitting coil transmits magnetic fields with different frequencies, the induced voltage of each wireless energy receiving end is changed, and the size of the wireless energy received by each wireless energy receiving end is regulated and controlled; the wireless energy receiving terminals all adopt receiving coils, similarly, the receiving coils and the transmitting coils are synchronously arranged in a square shape, a rectangular shape or a circular shape, the transmitting coils and the receiving coils realize the receiving and transmitting of wireless energy based on a magnetic coupling resonance technology, as shown in the principle schematic diagram and the structural schematic diagram of a magnetic coupling resonance circuit of fig. 3a-3b, a primary side represents a wireless energy transmitting terminal, a secondary side represents a wireless energy receiving terminal, the primary side comprises an alternating current power supply, a rectifying circuit, an inverter circuit, a resonator and a control unit of the primary side, the secondary side comprises a resonator, a rectifying circuit, a direct current conversion circuit, a direct current load and a control unit of the secondary side, the resonator of the primary side can be understood as the wireless energy transmitting terminal, the resonator of the secondary side can be understood as the wireless energy receiving terminal, the two carry out wireless energy transmission by the resonance coupling principle, and the corresponding magnetic coupling resonance model is shown in the structural schematic Quantity transmitting terminal is taken as an example), Ud represents an alternating current power supply at a primary side, actually, an initial voltage provided by a power controller to a single underground wireless energy transmitting terminal, four switching tubes of Q1, Q2, Q3 and Q4 form a full-bridge inverter circuit, g1, g2, g3 and g4 correspond to control signals of four switching tubes of Q1, Q2, Q3 and Q4, generally, Q1 and Q4 are conducted simultaneously or Q2 and Q3 are conducted simultaneously, an output inversion voltage is U1, namely, the voltage actually applied to two ends of a single underground wireless energy transmitting end, C1 and C2 respectively represent resonance capacitors of the underground wireless energy transmitting end and a wireless energy receiving end, R1 and R2 respectively represent internal resistances of coils adopted by the underground wireless energy transmitting end and the wireless energy receiving end, RL represents a direct current load on a secondary side, and M is a mutual inductance value of the coils on two sides of a primary side and a secondary side.
The trolley bus based on wireless charging technology preferably also comprises a backup power supply (also understood as a storage battery) as shown in figure 1, the standby power supply (storage battery) stores redundant electric energy during wireless charging and is connected with vehicle-mounted components (such as the vehicle control unit, the planetary gear reducer, the motor and the power electronic converter) to supply power for standby to the components when an underground external power grid is powered off or fails so as to ensure the normal operation of the trolley bus, when the underground external power grid is in power failure, the electric energy stored in the standby power supply (storage battery) is sent to the power electronic converter according to the running energy requirement of a preset form path stored on the whole vehicle controller, the power electronic converter supplies the electric energy to the motor after adjusting the voltage and the current, and the normal running of the trolley bus can be still maintained under the power failure state through the cooperative control of the whole vehicle controller and the power electronic converter.
Preferably, the vehicle controller collects current operation information of the trolley bus, including but not limited to vehicle position information, current vehicle speed, running time information, current road condition and current running demand information, the vehicle position information, such as GPS information, describes the current underground wireless energy transmitting end and coordinate information of the trolley bus, can accurately describe that the trolley bus runs on a certain transmitting coil or near a certain transmitting coil, provides accurate transmitting coil coordinates for the power controller (referring to planar coordinates of the transmitting coil in the whole system device, for example, a planar coordinate system is established by taking an intersection of a running start line and a road center line as an origin, each transmitting coil has only one coordinate), and describes the number of the underground wireless energy transmitting ends that the trolley bus is about to run through, namely describes the number of turns of the transmitting coil that the trolley bus is about to run through in a certain period of time in the future so as to determine the transmitting that needs to be regulated and controlled by the power controller The number of the coils, in addition, the number of the transmitting coils with regulated and controlled voltage regulation is also related to the size of the transmitting coils, under the same vehicle speed, the number of the transmitting coils with large size corresponding to the voltage regulation to be needed is smaller than the number of the transmitting coils with small size corresponding to the voltage regulation to be needed, and the number is expressed by using a mathematical expression as follows:
in the formula: n is the number of transmitting coils needing to be regulated, and upsilon is the current vehicle speed; t is the travel time information, and can also be understood as the control time step, i.e. the time interval of the intervention of the control system; l is the total length of the interval between the transmitting coils and the column-direction diameter or side length of a single transmitting coil; and/or different running working conditions of the trolley bus comprise but are not limited to acceleration running, deceleration running, differential steering running and brake stopping, the underground external power grid can calculate the number N of the regulated transmitting coils and the terminal voltage U of the corresponding transmitting coils according to the current speed upsilon, the future track, the charging efficiency mu, the underground wireless energy transmitting end step-up ratio eta 1, the wireless energy receiving end step-down ratio eta 2 and the receiving voltage limit value through the power controllerLaunchingTerminal voltage U corresponding to receiving coilReceivingAnd the ratio of voltage increase to voltage decrease, UMIs the motor voltage, PMFor the required power of the motor, the mathematical expressions are:
Ulaunching=μ×UReceiving (3)
ULaunching=U1×η1=|Ud|×η1 (4)
The voltage of the transmitting coil and the receiving coil can be obtained, for example, if the trolley bus is a front-wheel drive trolley, that is, two front wheels are driving wheels, and other structures of the invention are located at the corresponding positions of the left front wheel and the right front wheel of the trolley bus, when the trolley bus needs to be accelerated, the voltage of the two transmitting coils under the ground is regulated and controlled by the power controller to be simultaneously increased, so that the induced voltage of the receiving coil at the wireless energy receiving end is also increased, thereby realizing the acceleration of the motor, and finally realizing the acceleration running of the trolley bus, when the trolley bus needs to be decelerated or braked, the voltage of the two transmitting coils under the ground is regulated and controlled by the power controller to be simultaneously reduced even to zero or negative, so that the induced voltage of the receiving coil at the wireless energy receiving end is also reduced to realize the deceleration running or braking of the trolley bus, when the trolley bus needs to turn, a power controller is used for regulating and controlling voltage difference of two rows of transmitting end coils under the ground, one row of induced voltage with large voltage is large, the speed of a driving wheel in the direction of the corresponding trolley bus is large, and the other row of induced voltage with small voltage is small, the speed of the driving wheel in the direction of the corresponding trolley bus is small, so that the speed difference of two front wheels is generated, thereby realizing the turning of the vehicle, and in combination with the model schematic diagram of figure 3b, when the trolley bus needs to accelerate in the driving process, Q1 and Q4 switching tubes are simultaneously conducted, Q2 and Q3 switching tubes are turned off, then the boosting ratio of the transmitting end is increased, the step-down ratio of the receiving end is reduced or the step-down ratio of the receiving end is reduced, if the speed is reduced, the Q2 and Q3 switching tubes are simultaneously conducted, the Q1 and Q4 switching tubes are turned off, then the boosting ratio of the transmitting end is, if the vehicle needs to be steered or steered in a differential mode, firstly, whether the vehicle is in an accelerating process or a decelerating process is judged, the corresponding switching tube is controlled to be switched on or switched off, then, the transmitting end voltage boosting ratio is increased or the receiving end voltage reducing ratio is decreased or both are increased on one of the left side and the right side, or the transmitting end voltage boosting ratio is decreased or the receiving end voltage reducing ratio is increased or both are increased on the other side, and the rotating speed difference of the left motor and the right motor is indirectly controlled by causing the induced voltage difference of the receiving coils of the left wheel and the right wheel in the same parallel, so that the differential steering of the.
The invention also relates to a running control method of the trolley bus based on the wireless charging technology, which is applied to the running control process of the trolley bus comprising a whole car controller, wheels, a planetary gear reducer, a motor and a power electronic converter which are connected in sequence, wherein the wheels, the planetary gear reducer, the motor and the power electronic converter are all arranged in pairs, the whole car controller controls the planetary gear reducer, the motor and the power electronic converter according to the real-time information of the trolley bus, the control method corresponds to the trolley bus based on the wireless charging technology, namely, the method for realizing the running control is understood, as shown in a preferred flow chart of figure 4, firstly, wireless energy receiving ends connected with the power electronic converter are arranged in pairs on the trolley bus, underground wireless energy transmitting ends matched with the wireless energy receiving ends are continuously laid side by side below a preset running road sign, wherein the preset driving route road sign can be set in the whole distance or at intervals in the whole distance, and is set according to the actual application scene, further, the two rows of underground wireless energy transmitting ends laid side by side continuously are set by taking the center line of the road through which the trolley bus runs/the preset driving route road sign as the center line, the distance between the two underground wireless energy transmitting ends in the same row is equal to the wheel track of the trolley bus, the two underground wireless energy transmitting ends can be completely ensured to correspond to the two wireless energy receiving ends positioned at the left and the right of the trolley bus body, each underground wireless energy transmitting end is connected with an underground external power grid, each wireless energy receiving end obtains wireless electric energy from the underground external power grid through each underground wireless energy transmitting end, the voltage and current of the wireless energy obtained from the wireless energy receiving end are converted to kinetic energy by a power electronic converter and then transmitted to a motor, the motor outputs kinetic energy and then transmits the kinetic energy to wheels through the planetary gear reducer, so that the trolley bus runs along a road sign of a preset running route; the method comprises the steps that a power controller is arranged on an underground external power grid and is in wireless communication with a whole vehicle controller, when the trolley bus runs, the whole vehicle controller collects current running information of the trolley bus and feeds the current running information back to the power controller, then the power controller regulates and controls voltage and current of each underground wireless energy transmitting end according to the feedback information so as to respectively regulate and control wireless energy received by each wireless energy receiving end, further the wireless energy is converted into kinetic energy through a motor and transmitted to wheels, and then the trolley bus is controlled to enter different running working conditions, the step is carried out in a crossing and synchronizing manner with the previous step so as to finally realize safe and effective running of the trolley bus along a preset running route, and the method is characterized in that paired wireless energy receiving ends are arranged on the trolley bus, underground wireless energy transmitting ends are continuously laid side by side under the preset running route and each underground wireless energy transmitting end is connected with the underground external power grid, the trolley bus can be wirelessly charged in real time in the running process along the preset running route, so that on one hand, the charging efficiency is greatly improved, the effective driving range is improved, and meanwhile, the trolley bus can be continuously and wirelessly charged, and the condition of traffic jam caused by large-scale stopping of the trolley bus is avoided, on the other hand, the trolley bus does not need to be in overhead contact with a power grid on the running route like a transmission trolley bus, the urban clearance is maintained to be attractive, the underground external power grid is more difficult to damage, and the overall safety is greatly improved; in addition, the underground power controller is used for regulating and controlling voltage and current of underground wireless energy transmitting ends according to feedback information of the whole vehicle controller so as to respectively regulate and control the size of wireless energy received by each wireless energy receiving end and further respectively convert the wireless energy into kinetic energy through the motor and transmit the kinetic energy to each wheel and then control the trolley bus to enter different running working conditions, so that a driver does not need to control the vehicle, only a running route road sign needs to be planned in advance, then unmanned driving of the vehicle can be realized to a certain extent after a control instruction is given to the power controller, the working condition of the vehicle can be effectively regulated, the design does not need to install a traditional steering control device, a traditional braking control device and the like on the vehicle, the light weight of the vehicle is effectively realized, and larger load can be borne.
Preferably, each underground wireless energy transmitting end is connected with a transformer which is also positioned underground, each underground wireless energy transmitting end is independently regulated and controlled by the power controller through the transformer which is connected with each underground wireless energy transmitting end, when a certain underground wireless energy transmitting end breaks down, other underground wireless energy transmitting ends are still normally operated without interference, and the power controller can still operate by regulating and controlling the underground wireless energy transmitting end adjacent to the fault point, so that the stability of the system is ensured.
Preferably, each underground wireless energy transmitting end adopts a transmitting coil, the transmitting coil is set to be square, rectangular or circular, preferably, each transmitting coil is independently regulated and controlled by the power controller through a transformer connected with each transmitting coil, namely, the power controller regulates the voltage of each transmitting coil through the transformer of each transmitting coil (the voltage provided by an underground external power grid to each transmitting coil dynamically changes along with time), so that each transmitting coil transmits a magnetic field with different frequency, the induced voltage of each wireless energy receiving end is changed, and the wireless energy received by each wireless energy receiving end is regulated and controlled; the wireless energy receiving ends all adopt receiving coils, similarly, the receiving coils and the transmitting coils are synchronously arranged to be square, rectangular or circular, the transmitting coils and the receiving coils realize the receiving and transmitting of wireless energy based on a magnetic coupling resonance technology, the performance is optimized, and the efficiency of wireless energy transmission can be ensured.
The operation control method of the trolley bus based on the wireless charging technology preferably also adopts a standby power supply (also can be understood as a storage battery) to store redundant electric energy during wireless charging, the standby power supply (the storage battery) is connected with each part on the vehicle and is used for supplying standby power to each part when the underground external power grid is in power failure or faults so as to ensure the normal operation of the trolley bus, when the underground external power grid is in power failure, the electric energy stored in the standby power supply (the storage battery) is sent to a power electronic converter according to the running energy requirement of a preset form path stored on the whole vehicle controller, the power electronic converter supplies the electric energy to a motor after adjusting the voltage and current, and the normal running of the trolley bus is still ensured under the power failure state through the cooperative control of the whole vehicle controller and the power electronic converter.
Preferably, the vehicle controller collects current operation information of the trolley bus, including but not limited to vehicle position information, current vehicle speed, running time information, current road condition and current running demand information, the vehicle position information, such as GPS information, describes the current underground wireless energy transmitting end and coordinate information of the trolley bus, can accurately describe that the trolley bus runs on a certain transmitting coil or near a certain transmitting coil, provides accurate transmitting coil coordinates for the power controller (referring to planar coordinates of the transmitting coil in the whole system device, for example, a planar coordinate system is established by taking an intersection of a running start line and a road center line as an origin, each transmitting coil has only one coordinate), and describes the number of the underground wireless energy transmitting ends that the trolley bus is about to run through, namely describes the number of turns of the transmitting coil that the trolley bus is about to run through in a certain period of time in the future so as to determine the transmitting that needs to be regulated and controlled by the power controller The number of the coils, in addition, the number of the transmitting coils which are regulated and controlled to regulate the voltage is related to the size of the transmitting coils, under the same vehicle speed, the number of the transmitting coils which need to regulate the voltage and correspond to the large-size transmitting coils is smaller than the number of the transmitting coils which need to regulate the voltage and correspond to the small-size transmitting coils, and the specific number is calculated according to the actual scene; and/or, different driving conditions of the trolley bus include but are not limited to acceleration driving, deceleration driving, differential steering driving, braking and stopping, when the trolley bus needs to accelerate, the power controller regulates and controls the voltage of two rows of transmitting coils under the ground to increase simultaneously, so that the induced voltage of the receiving coil of the wireless energy receiving end also increases, thereby realizing the acceleration of the motor, and finally realizing the acceleration driving of the trolley bus, when the trolley bus needs to decelerate or brake, the power controller regulates and controls the voltage of two rows of transmitting coils under the ground to decrease even to zero or negative simultaneously, so that the induced voltage of the receiving coil of the wireless energy receiving end also decreases to realize the deceleration of the motor, and finally realizing the deceleration driving or braking of the trolley bus, when the trolley bus needs to steer, the power controller regulates and controls the voltage difference of the two rows of transmitting coils under the ground, the speed of the driving wheel of the trolley bus in the direction corresponding to the large-voltage row is high, otherwise, the speed of the driving wheel of the trolley bus in the direction corresponding to the small-voltage row is low, so that the speed difference occurs between the two front wheels, and the steering of the vehicle is realized.
It should be noted that the above-mentioned embodiments enable a person skilled in the art to more fully understand the invention, without restricting it in any way. Therefore, although the present invention has been described in detail with reference to the drawings and examples, it will be understood by those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention.
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CN115817250B (en) * | 2023-02-20 | 2023-05-09 | 通号(长沙)轨道交通控制技术有限公司 | Tramcar ground charging control method, device, equipment and storage medium |
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