CN105896695B - Electric bus station suspended wireless charging system - Google Patents

Abstract

The invention discloses a suspended wireless charging system for an electric bus platform, comprising an electric energy transmitting device installed on the bus platform and an electric energy receiving device installed on the electric bus; the electric energy transmitting device includes a linear motor, a position induction adjustment system, height adjustment arm, transmitting coil, primary power adjusting device, signal receiving and processing system, the power receiving device includes receiving coil, secondary power adjusting device, signal transmitting device, on-board battery pack, on-board display control device, shielding device, The present invention proposes a brand-new electric bus station suspended wireless charging system, which can be used for electric buses of general structure, and can wirelessly charge the electric public buses driving into the bus platform, which can effectively improve the power transmission efficiency and reduce the battery Pack capacity, extend battery life and greatly reduce charging costs.

Description

Electric bus station suspended wireless charging system

technical field

The invention belongs to the technical field of wireless charging, and more particularly, the invention relates to a suspended wireless charging system for electric bus platforms, which can perform short-term high-power wireless charging on electric buses parked on the platform.

technical background

With the intensification of global warming, energy conservation and emission reduction have become the focus of attention all over the world. Traditional fuel-powered buses can no longer meet the needs of energy conservation and emission reduction. Electric new energy buses can greatly reduce emissions and even achieve zero emissions. , which is not only conducive to energy saving and emission reduction, but also can effectively reduce operating costs. It has become the best choice for public transportation systems and has huge development potential in China. According to relevant statistics, the daily mileage of each bus in my country is about 220-280 kilometers, and the fuel consumption is about 90-120 liters, which is equivalent to the fuel consumption and emissions of 30 private cars. If electric vehicles are used, the carbon dioxide emission reduction is about 44 tons. In addition, electric vehicles use electric motors instead of engines, which are almost noiseless, helping to reduce noise pollution in cities.

Existing electric buses basically use lithium-ion batteries. Lithium-ion batteries have the advantages of safety and reliability, high working voltage, no memory effect, etc., but their energy density is still low, resulting in a short driving range of electric vehicles on a single charge. The capacity battery pack generally weighs about one ton, which greatly reduces the driving efficiency of the bus. More importantly, the cycle life of batteries in groups is generally low, and the cycle life is about 1000 times.

The existing electric bus charging basically adopts wired charging, which is divided into two methods: slow charging and fast charging. The slow charging method requires the bus to stop at the bus charging station for long-term charging. In order to be charged once a day to meet the mileage requirements, it is necessary to load at least 220 kWh and about 3100 kg of batteries. In order to install less batteries and reduce the weight of the car body, there will be a phenomenon in which two cars are used as one car in some demonstration projects, that is, two cars run in shifts a day, and the number of ordinary limited charging stations is the same as that of electric buses. The increase in the number of urban areas needs to occupy a large amount of urban land. The fast charging method requires a large charging current. When a charging station turns on the charger, the power may reach the "megawatt" level. Specialized operators need to be trained, which increases the charging cost, and the charging operation is also very dangerous. In addition, since the battery pack is basically in a fully discharged state, the life of the lithium battery will be shortened.

Wireless charging, also known as inductive charging, uses near-field induction, that is, inductive coupling, to transfer energy from a power supply device (charger) to a device that uses electricity. its own operation. Since the charger and the electrical device transmit energy through inductive coupling, there is no wire connection between the two, so the charger and the electrical device can have no exposed conductive contacts, which is more convenient and safer than wired charging. Secondly, wireless charging is automatic charging, no operator is required, and the risk of electric shock can be avoided. Thirdly, the wireless charging electrical components are not exposed, and will not be corroded by moisture, oxygen, etc. in the air; there is no contact, so there will be no loss caused by mechanical wear and flashover during connection and separation.

However, the main parts of an inductive wireless charger are the transmitter coil and the receiver coil. There is a large air gap between the transmitting and receiving coils, which is generally equal to the distance from the bus chassis to the ground. The size of the air gap is one of the key factors for the coupling coefficient of the loosely coupled transformer. In order to achieve the rated charging power, the current in the transmitting coil needs to be increased, so that the radiation of the electromagnetic field increases. As the energy transmission medium of the inductive wireless charging system, the electromagnetic field will have an eddy current effect on the metal objects on the ground, directly heating the metal objects, and there is a risk of fire. For example, when a piece of tin foil falls under the chassis of a car, the magnetic field generated by the high-power wireless charging system quickly generates a large current on the tin foil, igniting the tin foil. In order to eliminate the fire hazard caused by metals (such as coins, chewing gum wrappers, cans, etc.) falling on the ground, electromagnetic induction wireless charging systems are usually equipped with metal detection devices, which greatly increases the design cost. The high-frequency electromagnetic waves used in electric vehicles are harmful to human tissue and the central nervous system. The International Commission on Non-Ionizing Radiation Protection (ICNIRP) has strict regulations on the radiation intensity of the human body under high-frequency electromagnetic fields. For wireless charging of high-power electric buses, metal plates are required for shielding. However, due to the limited space under the vehicle, it is not conducive to the design of the shielding system. In addition, the high-frequency electromagnetic field is fatal to small animals under the chassis when charging, such as cats, dogs, snakes, etc. In addition, wireless charging does not solve the need for large-capacity battery packs and short battery life in electric buses.

To sum up, the disadvantages of electric bus charging include: 1. The battery is large in size and weight, which reduces the operating efficiency of the bus. 2. Short battery life. For the wireless charging of electric buses, the disadvantages include: 1. The transmission distance from the ground to the chassis is large, and the transmission efficiency is low; 2. The metal objects on the ground have fire hazards; 3. The metal detection device needs to be designed separately, and the cost is high; 4. The space under the vehicle is limited, and the design of the electromagnetic field shielding system is more difficult.

SUMMARY OF THE INVENTION

In order to overcome the above-mentioned shortcomings of electric bus charging and electric bus wireless charging, the present invention proposes a brand-new electric bus platform suspension type wireless charging system, which can be used for electric buses of general structure and can effectively improve the power transmission efficiency. , reduce the capacity of the battery pack, prolong the life of lithium batteries, and greatly reduce the cost of charging.

The technical scheme adopted in the present invention is:

An electric bus station suspended wireless charging system, comprising an electric energy transmitting device installed on the bus station platform and an electric energy receiving device installed in the electric bus;

The power transmitting device includes a linear motor, a position induction adjusting system, a height adjusting arm, a transmitting coil, a primary power adjusting device, and a signal receiving and processing system, the linear motor is installed on the primary side rail, and the secondary side of the linear motor is The part is bidirectionally movable along the primary side track, the height adjustment arm is installed and fixed on the secondary side part, the transmitter coil is installed and fixed at the bottom end of the height adjustment arm, and a side of the secondary side part is installed and fixed. There is a signal receiving and processing system on the side;

The power receiving device includes a receiving coil, a secondary power conditioning device, a signal transmitting device, a vehicle-mounted battery pack, a vehicle-mounted display control device, and a shielding device. The receiving coil, the secondary power-conditioning device, the signal transmitting device, and the vehicle-mounted battery pack are installed On an electric bus, the shielding device is provided on both sides of the receiving coil, and a power monitoring device is provided on the circuit between the secondary power conditioning device and the on-board battery pack, and the power monitoring device is connected to the The vehicle display control device is electrically connected.

Further, the bus stop includes a roof and a pillar supporting the roof, the roof extends and covers the upper part of the lane where the electric bus stops, and the primary side rail is fixed under the roof.

Further, a metal cabinet is fixed on the ground of the bus stop, and the primary power conditioning device is installed in the metal cabinet.

Further, the shielding device is a metal plate or a closed coil.

Further, the in-vehicle display control device is located in the electric bus and can be embedded in the dashboard of the electric bus, and the in-vehicle display control device has a physical switch or a virtual switch.

Further, the transmitting coil includes a transmitting shielding layer, a transmitting soft magnetic material and a primary winding from top to bottom.

Further, the receiving coil is composed of a receiving shielding layer, a receiving soft magnetic material and a secondary winding, and the order from top to bottom is the receiving shielding layer, the receiving soft magnetic material, and the secondary winding.

Further, the primary power adjustment device is mainly composed of a power factor correction module, a voltage adjustment module, a control circuit, an inverter, a primary side resonant capacitor, and a primary side voltage and current detection and protection device; the control circuit leads out one channel and the voltage regulator. module connection, the voltage adjustment module is electrically connected to the power factor correction module, and the power factor correction module is externally connected to a power grid; the control circuit leads out another path and is connected to the inverter, and the inverter is connected to the inverter. The voltage regulation module is electrically connected, the primary side resonant capacitor and the transmitting coil are connected in series with a lead-out channel of the inverter, and the primary side voltage and current are arranged between the inverter and the transmitting coil A detection and protection device, the primary voltage and current detection and protection device is electrically connected with the control circuit; the signal receiving and processing system is electrically connected with the control circuit, and a position control module is connected with the signal receiving and processing system.

Further, a solar cell panel is connected to the circuit drawn between the voltage regulation module and the power factor correction module, and the solar cell panel is installed above the ceiling.

Further, the secondary power adjustment device is mainly composed of a secondary resonance capacitor, a rectifier, a filter module, and a secondary voltage and current detection and protection device, and the secondary resonance capacitor is connected in series with the rectifier and the receiving coil, The rectifier is connected with a filter module, a secondary voltage and current detection and protection device is arranged between the filter module and the rectifier, and the secondary voltage and current detection and protection device is electrically connected with the signal transmission device, so The output end of the filter module is electrically connected to the vehicle-mounted battery pack, a power monitoring device is provided on the circuit between the filter module and the vehicle-mounted battery pack, and the power monitoring device is electrically connected to the vehicle-mounted display control device. The vehicle display control device is electrically connected with the signal transmitting device, and the signal transmitting device is connected with a position sensor.

Before the bus enters the bus stop, send the bus and vehicle battery information to the power transmitter on the bus station side, including the bus stop time, the height of the bus receiving coil, the vehicle battery information and the required charging power . When the bus enters the station, the transmitter coil on the bus station side controls the height adjustment arm according to the known longitudinal position of the receiver coil, so that the air gap between the receiver coil and the transmitter coil is controlled at a preset value. The position sensing adjustment system of the linear motor monitors the position of the receiving coil, controls the secondary side of the linear motor and the lateral position movement of the transmitting coil, so that there is no relative displacement between the transmitting coil and the receiving coil, ensuring the maximum transmission efficiency and transmission power until the bus leaves. station or complete the required power transfer.

The present invention has the following advantages due to the adoption of the above-mentioned technical solutions:

1. The coil is small in size, large in power transmission capacity and high in efficiency. Since the air gap distance between the transmitting coil and the receiving coil is controllable and fixed within a small range, and since the position of the transmitting coil follows the receiving coil in real time, there is no relative horizontal displacement between the two coils, so that the transmitting and receiving coils have no relative horizontal displacement. The coupling coefficient between them is high, thereby reducing the volume of the coil, enhancing the power transmission capacity, and improving the system efficiency;

2. Only one transmitter coil is required. Since the transmitter coil moves with the receiver coil, only one transmitter coil can be completed during the entire 60-second charging process, saving costs;

3. There is no fire hazard, no additional metal detection and animal detection functions are required, and costs are saved. Since the wireless power transmission is completed on the top of the bus, there will be no eddy current effect on the metal objects on the road or the ground, and there is no fire hazard. There is no need to design and install additional metal detection devices, saving costs. In addition, there is no need to design and install additional animal detection devices.

Description of drawings

Figure 1 is a front view of a bus with a suspended wireless charging system at an electric bus station;

Figure 2 is a side view of the bus of the electric bus station suspended wireless charging system;

FIG. 3 is a cross-sectional view of the transmitting coil 106 and the receiving coil 107;

Figure 4 is a schematic diagram of the electrical functional unit of the electric bus station suspended wireless charging system.

In the figure: 101-pillar 102-ceiling 103-primary side rail 104-secondary side part 105-height adjusting arm 108-shielding device 110-signal receiving and processing system 111-solar panel 113-signal transmitting device 114-vehicle battery pack 115-power monitoring device 116-vehicle display control device;

106-transmitting coil 201-transmitting shielding layer 202-transmitting soft magnetic material 203-primary winding;

107-receiving coil 204-secondary winding 205-receiving soft magnetic material 206-receiving shielding layer;

109-primary power adjustment device 301-power factor correction module 302-voltage adjustment module 303-control circuit 304-inverter 305-primary resonance capacitor 310-primary voltage and current detection and protection device;

112-Secondary power adjustment device 306-Secondary resonance capacitor 307-Rectifier 308-Filter module 309 Secondary voltage and current detection and protection device;

311-Position sensor 312-Position control module.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.

Figures 1 and 2 show a suspended wireless charging system at an electric bus stop. This suspended wireless charging system consists of two parts: the power transmitter on the bus station side and the power receiver on the electric bus side. The bus stop should have a roof 102 that extends and covers the lane where the electric bus stops. The power transmitting device of the wireless charging system is installed on the ceiling 102 of the bus stop. The power transmitting device includes:

Linear motor and position sensing adjustment system, the primary side of the linear motor is installed and fixed on the ceiling 102 of the platform, the lateral position of the secondary side part 104 of the linear motor can be adjusted, and the position of the secondary side part 104 of the linear motor is adjusted by position sensing system control;

The height adjustment arm 105 and the height sensing adjustment system are mounted on the secondary side portion 104 of the linear motor and move with the lateral position of the secondary side portion 104 of the linear motor;

The transmitting coil 106 is mounted on the height adjusting arm 105, its longitudinal position is controlled by the height adjusting arm 105, and its lateral position is controlled by a linear motor, therefore, the longitudinal and lateral positions of the transmitting coil 106 are controllable, and the lateral position can be controlled along the electric motor. The direction of the bus travels back and forth, and the height of the transmitter coil 106 can be adjusted longitudinally;

The primary power conditioning device 109 is used to convert the low-frequency alternating current of the grid into high-frequency alternating current and transmit it to the transmitting coil. The primary electric energy regulating device 109 also has the functions of controlling output voltage (or current) stabilization, system power factor correction, etc.;

The signal receiving and processing system 110, wherein the signal receiving and processing system 110 can receive the wireless signal from the electric power receiving device on the side of the electric bus, including the entering time of the electric bus, the horizontal position information of the receiving coil 107 on the top of the electric bus, the longitudinal Position information, vehicle battery pack 114 information, etc., the signal receiving and processing system 110 will perform arithmetic processing on the received information, and generate control signals, drive the linear motor and the height adjustment arm 105, and control the output power of the primary power adjustment device 109, etc. Wait.

The primary power conditioning device 109 is usually installed on the ground of the bus stop, located in a metal cabinet, and its function is to convert the low-frequency alternating current of the grid into high-frequency alternating current for the transmitting coil 106 to generate a high-frequency magnetic field. In addition, power will be supplied to the linear motors and the control system. The primary power conditioning device 109 is connected to the power grid, or uses a variety of power input, for example, in a sunny city, the solar panel 111 installed above the bus stop ceiling 102 can be used as the power input, if only the power input of the solar panel If it is not enough, you can use solar energy and grid multiple power sources to input at the same time.

The bus stop includes a ceiling 102 and pillars 101 supporting the ceiling. The ceiling 102 extends and covers the lane where the electric bus stops, which can not only play the role of blocking rain (snow) for pedestrians, but also install the primary side rail of the linear motor under the ceiling. 103. The secondary side portion 104 of the linear motor can move bidirectionally along the primary side rail 103 . The direction of the primary side rail 103 is the same as the direction in which the electric bus travels.

The secondary side portion 104 of the linear motor is mounted and fixed with a height adjusting arm 105, and the bottom end of the height adjusting arm 105 is mounted and fixed with a transmitting coil 106. Therefore, the longitudinal position (height) of the transmitting coil 106 can be adjusted by the height adjustment arm 105, and the lateral (along the electric bus driving direction) position of the transmitting coil 106 can be adjusted and controlled by the linear motor. A signal receiving and processing system 110 is installed on the secondary side part 104 of the linear motor, and the received signal is transmitted to the primary power conditioning device 109 for control through wires.

The electric bus side power receiving device of this suspended wireless charging system includes:

The receiving coil 107 is installed and fixed on the roof of the electric bus, and moves with the movement of the electric bus, and its function is to couple with the transmitting coil 106 to convert the magnetic field energy generated by the transmitting coil 106 into electrical energy;

The secondary power adjustment device 112 is used to convert the high-frequency alternating current generated by the receiving coil 107 into stable direct current for charging the vehicle battery pack 114;

The on-board display control device 116, which can monitor the battery power, transmission power, required charging time, etc., the on-board display control device 116 can be controlled by the bus driver, and can cut off or open the power receiving device at any time;

The signal transmitting device 113 transmits the information of the electric power receiving device on the side of the electric bus to the signal receiving and processing system 110 of the electric power transmitting device in a wireless manner, which includes the entering time of the electric bus, the receiving coil 107 on the top of the electric bus. Lateral position information, longitudinal position information, vehicle battery pack 114 information, etc.;

The shielding device 108, which is usually a metal plate or a closed coil, reduces the radiation of electromagnetic fields to pedestrians below safety standards.

The magnetic field coupling between the receiving coil 107 and the transmitting coil 106 on the side of the electric bus is related to the length of the air gap between the two coils. The larger the air gap, the smaller the coupling coefficient, the smaller the power transmission capacity, and the lower the system efficiency. In the present invention, the length of the air gap can be adjusted by the height adjustment arm 105 controlling the longitudinal position of the transmitting coil 106. During the charging process, the air gap is controlled as small as possible to achieve higher system efficiency and power transmission capability. When the road surface is uneven and bumpy, the receiving coil 107 will be displaced longitudinally, and the size of the air gap can ensure that the highest position of the receiving coil 107 will not touch the transmitting coil 106 .

There are shielding devices 108 against the electromagnetic field on both sides of the receiving coil 107, which are usually metal plates or closed coils, which can effectively prevent the electromagnetic field transmitting energy from radiating to pedestrians on the platform, and preventing the electronic portable devices (such as mobile phones) from having electromagnetic radiation to pedestrians. interference.

The receiving coil 107 is connected to the secondary power conditioning device 112, and the secondary power conditioning device 112 converts the high-frequency alternating current into constant direct current for battery charging. The secondary energy conditioning device 112 is thus connected to the on-board battery pack 114 . The power monitoring device 115 detects the electrical power received by the vehicle battery pack 114 in real time, and transmits battery information (such as battery voltage, remaining power, etc.) to the vehicle display control device 116 . The in-vehicle display control device 116 is located in the vehicle and can be embedded in the dashboard of the electric bus to display battery information on the dashboard. Moreover, the on-board display control device 116 has a physical or virtual switch, and the bus driver can control the switch to turn off or turn on the suspended wireless charging system at any time.

The secondary power conditioning device 112 and the onboard battery pack 114 may be located on top of the electric bus, or any other mountable location. The signal transmitting device 113 can transmit the vehicle information (whether it is a rechargeable electric bus), battery information, the horizontal and vertical positions of the receiving coil 107, and the stop time of the electric bus through Wi-Fi or other wireless signal transmission methods to the signal reception processing system 110 .

FIG. 3 is a cross-sectional view of the transmit coil 106 and the receive coil 107 . The transmitting coil 106 is composed of the primary winding 203 , the transmitting soft magnetic material 202 , and the transmitting shielding layer 201 . The order from top to bottom is the transmitting shielding layer 201 , the transmitting soft magnetic material 202 and the primary winding 203 . The receiving coil 107 is composed of three parts: the secondary winding 204 , the receiving soft magnetic material 205 , and the receiving shielding layer 206 . The transmitting soft magnetic material 202 and the receiving soft magnetic material 205 are generally materials with high magnetic permeability, such as ferrite materials, which can increase the coupling coefficient of the two coils, and make the magnetic field bound in the soft magnetic material, which can reduce the External electromagnetic field radiation. The transmitting shielding layer 201 in the transmitting coil 106 is to shield the electromagnetic field from the eddy current effect in the metal material of the primary side rail 103 and the secondary side part 104 on the height adjustment arm 105 and the linear motor. The receiving shielding layer 206 in the receiving coil 107 is used to shield the electromagnetic field from the eddy current effect in the metal material of the vehicle roof, and reduce the electromagnetic field radiation to the passengers in the vehicle.

Figure 4 is a schematic diagram of the electrical functional unit of the electric bus station suspended wireless charging system.

The primary power adjustment device 109 is mainly composed of a power factor correction module 301, a voltage adjustment module 302, a control circuit 303, an inverter 304, a primary side resonant capacitor 305, and a primary side voltage and current detection and protection device 310; the control circuit 303 leads to one channel Connected to the voltage regulation module 302, the voltage regulation module 302 is electrically connected to the power factor correction module 301, and the power factor correction module 301 is externally connected to a power grid; the control circuit 303 leads out another path to the inverter 304 is connected, the inverter 304 is electrically connected with the voltage regulation module 302, and the inverter 304 leads a path connected in series with the primary resonance capacitor 305 and the transmitting coil 106, the inverter 304 The primary voltage and current detection and protection device 310 is arranged between the transmitting coil 106 and the primary voltage and current detection and protection device 310 is electrically connected to the control circuit 303; the signal receiving and processing system 110 is connected to the The control circuit 303 is electrically connected, and the signal receiving and processing system 110 is connected with a position control module 312 .

The secondary power adjustment device 112 is mainly composed of a secondary resonance capacitor 306, a rectifier 307, a filter module 308, and a secondary voltage and current detection and protection device 309. The secondary resonance capacitor 306 is connected to the rectifier 307, the receiving The coils 107 are connected in series, the rectifier 307 is connected with a filter module 308, a secondary voltage and current detection and protection device 309 is arranged between the filter module 308 and the rectifier 307, and the secondary voltage and current detection and protection device 309 is connected to The signal transmitting device 113 is electrically connected, the output end of the filter module 308 is electrically connected to the vehicle battery pack 114 , and a power monitor is provided on the circuit between the filter module 308 and the vehicle battery pack 114 . Device 115, the power monitoring device 115 is electrically connected with the vehicle display control device 116, the vehicle display control device 116 is electrically connected with the signal transmitter 113, and the signal transmitter 113 is connected with a position sensor 311 .

The system power supply can be three-phase or single-phase 50 or 60Hz, 380V or 220V alternating current provided by the grid, or can be one-way direct current provided by the solar panel 111, or two inputs are performed simultaneously. Using grid power supply requires a power factor correction module 301 to minimize the reactive power generated by the system, and at the same time convert low-frequency 50Hz or 60Hz alternating current into direct current. The direct current passes through the voltage adjustment module 302 to convert the voltage of the direct current into a desired voltage value. This voltage value is related to the voltage of the on-board battery pack 114, the coupling coefficient of the transmitting coil 106 and the receiving coil 107, the required system output power, and the like. The output voltage of the voltage regulation module 302 passes through the inverter 304 to convert the direct current into high-frequency alternating current, and the frequency is usually greater than or equal to 20 kHz.

The transmitting coil 106 and the receiving coil 107 are coupled by a magnetic field, and an induced voltage is generated in the receiving coil 107 . The receiving coil 107 is connected to the rectifier 307 via the secondary resonance capacitor 306 connected in series with it, and converts the high-frequency alternating current into direct current. After passing through the filter module 308 , a stable output voltage (or current) is obtained to charge the vehicle battery pack 114 . The power monitoring device 115 detects the energy obtained by the on-board battery pack in real time, and transmits the measured data to the on-board display control device 116 and displays it to the driver. The in-vehicle display control device 116 can be located in the cab or integrated in the instrument panel, the driver or the occupants of the vehicle can monitor the power transmission value at any time, and can cut off the entire wireless power transmission system through the control switch.

In the primary power conditioning device 109 , the output current of the inverter 304 is monitored by the current Hall, and the monitored current signal is sent to the primary voltage and current detection protection module 310 . The primary side voltage and current detection and protection module 310 is connected to the control circuit 303 , and once it is detected that the primary side voltage and current is higher than a safe value, the entire wireless power transmission system is cut off. In the secondary power conditioning device 112 , the output of the rectifier 307 is sampled and monitored by the secondary voltage and current detection module 309 , and the sampling result is sent to the signal transmitting device 113 . The voltage and current signals of the secondary coil 107 may have been transmitted to the signal receiving and processing system 110 through the signal transmitting device 113 and connected to the control circuit 303. Once it is detected that the voltage and current of the secondary side is higher than a safe value, the entire wireless power transmission system will be cut off. In addition, the signal transmitting device 113 will also detect the position information of the bus and the receiving coil 107, including the lateral position and the longitudinal position, and transmit it wirelessly to the signal receiving and processing system 110, and the signal is used to control the secondary side part 104 of the suspended linear motor. and height adjustment arm 105 so that the transmitter coil 106 tracks the position of the receiver coil 107 throughout the charging process.

The wireless charging system is designed for electric buses driving into bus stops. Each bus stops at the bus station, which is divided into three steps: entering the station, stopping for passengers to get on and off, and exiting the station. The whole process usually lasts about one minute. For peak travel periods, or busy bus stops, the duration is longer. The wireless charging system wirelessly charges each electric bus that enters a bus stop. The charging time is usually greater than or equal to one minute, and the total transmitted energy is enough to drive the bus to the next bus stop.

According to the calculation, for one minute of charging time,

Therefore, 100 kilowatts of charging power is enough to make the bus travel 1.6 kilometers. It can basically cover the distance between two bus stops in the city.

Therefore, during the operation of the electric bus, since it can be charged at each bus stop along the way, it does not need to carry a large-capacity battery pack, which greatly reduces the weight and cost of the bus. In addition, due to the shallow discharge of the battery pack, the life of the battery pack can be increased and the cost of replacing the battery can be reduced.

Finally, it should be noted that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the The technical solutions described in the foregoing embodiments may be modified, or some technical features thereof may be equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. a kind of Electric Transit station console suspension type wireless charging system, it is characterised in that: including being mounted on bus platform Electric energy transmission device, the electric energy reception device being mounted on electric bus；

The electric energy transmission device includes linear motor, location sensitive regulating system, height adjustment arm, transmitting coil, primary electrical It is adjustable device, signal receiving processing system, the linear motor is mounted on primary siding track, the secondary of the linear motor Side section can install and fix the height adjustment arm, the height along primary siding track way moving, the secondary side section The bottom end of degree regulating arm has installed and fixed the transmitting coil, and the side of the secondary side section is equipped with signal and receives processing system System；

The electric energy reception device includes receiving coil, secondary electric energy adjustment device, sender unit, on-vehicle battery group, vehicle Carry display control unit, screening arrangement, the receiving coil, secondary electric energy adjustment device, sender unit and on-vehicle battery Group is mounted on electric bus, and the two sides of the receiving coil are equipped with the screening arrangement, the secondary electric energy adjustment device Circuit between on-vehicle battery group is equipped with power monitoring apparatus, and the power monitoring apparatus and car-mounted display control fill Set electric connection；

The bus platform includes the pillar of ceiling and the support ceiling, and the ceiling extends and covers the electronic public affairs Above the lane for handing over vehicle to stop, the primary siding track is fixed on the lower section of the ceiling, the direction of the primary siding track with The direction that electric bus is advanced is identical.

2. Electric Transit station console suspension type wireless charging system according to claim 1, it is characterised in that: the public transport Metal cabinet is fixed on the ground of platform, the primary electric energy adjustment device is mounted in the metal cabinet.

3. Electric Transit station console suspension type wireless charging system according to claim 1, it is characterised in that: the shielding Device is metal plate or closing coil.

4. Electric Transit station console suspension type wireless charging system according to claim 1, it is characterised in that: described vehicle-mounted Display control unit is embedded on the instrument board of the electric bus, and the Vehicular display control device has physical switches or void Quasi- switch.

5. Electric Transit station console suspension type wireless charging system according to claim 1, it is characterised in that: the transmitting Coil is made of primary side winding, transmitting soft magnetic materials, transmitting shielded layer three parts, sequence from top to bottom be transmitting shielded layer, Emit soft magnetic materials and primary side winding.

6. Electric Transit station console suspension type wireless charging system according to claim 1, it is characterised in that: the reception Coil by reception shielded layer, receive soft magnetic materials and vice-side winding three parts and form, sequence from top to bottom be receive shielded layer, Receive soft magnetic materials, vice-side winding.

7. Electric Transit station console suspension type wireless charging system according to claim 1, it is characterised in that: the primary Electric energy adjustment device mainly by power factor correction module, voltage regulator module, control circuit, inverter, primary side resonant capacitance, Original edge voltage current detection protection device composition；The control circuit extraction is connect with voltage regulator module all the way, the voltage Adjustment module and the power factor correction module are electrically connected, and the power factor correction module is circumscribed with power grid；The control Circuit processed is drawn another way and is connect with the inverter, and the inverter and the voltage regulator module are electrically connected, described inverse Become device extraction and be in series with the primary side resonant capacitance and the transmitting coil all the way, between the inverter and the transmitting coil Equipped with the original edge voltage current detection protection device, the original edge voltage current detection protection device and control circuit electricity Property connection；The signal receiving processing system and the control circuit are electrically connected, and the signal receiving processing system is connected with Position control module.

8. Electric Transit station console suspension type wireless charging system according to claim 7, it is characterised in that: the voltage The circuit connection drawn between adjustment module and the power factor correction module has solar panel, the solar battery Plate is mounted on the top of the ceiling.

9. Electric Transit station console suspension type wireless charging system according to claim 1, it is characterised in that: the secondary Electric energy adjustment device is mainly by secondary side resonant capacitance, rectifier, filter module, secondary voltage current detection protection device group At, the pair side resonant capacitance is connected with the rectifier, the receiving coil, and the rectifier is connected with filter module, Secondary voltage current detection protection device, the secondary voltage electric current inspection are equipped between the filter module and the rectifier It surveys protective device and the sender unit is electrically connected, the output end of the filter module and on-vehicle battery group electricity Property connection, circuit between the filter module and on-vehicle battery group is equipped with power-measuring device, the power measurement dress It sets and is electrically connected with the Vehicular display control device, the Vehicular display control device electrically connects with the sender unit It connects, the sender unit connects position sensor.