A Wireless Charger Ground Positioning System Driven by the Magnetic Field of a Wire

Abstract

The present invention belongs to the field of power supply for electric vehicles, and specifically discloses a wireless charger ground positioning system driven by the magnetic field of a wire, which includes a base, a stator assembly and a rotor assembly. The base slides on the bottom plate through the cooperation of the stator assembly and the rotor assembly; limiting mechanisms for fixing on the bottom plate are symmetrically arranged on both sides of the base, and alignment sensors are installed at both ends of the wireless transmitting plate. The overall device of the present invention can perform alignment adjustment according to the offset position of the receiving plate, ensuring the largest effective charging receiving area and improving the charging efficiency; by using the principle that a current-carrying conductor generates a force in a magnetic field, the stator assembly and the rotor assembly are combined to form a driving structure, and bidirectional driving adjustment is realized by changing the direction of the current in the coil of the stator assembly, which can be used as the power source for the overall lateral movement of the charging device. The structure is simple, the controllability is strong, and the internal structure of the charging device is greatly simplified, saving space, with low noise and strong stability.

Description

Technical Field

[0001] The present invention relates to the field of power supply for electric vehicles, and particularly to a wireless charger ground positioning system driven by a wire magnetic field. Background Technique

[0002] An electric vehicle, that is, an electric drive vehicle, also known as an electric car. Electric vehicles are divided into AC electric vehicles and DC electric vehicles. Generally speaking, an electric vehicle uses a battery as an energy source, and through components such as a controller and a motor, it converts electrical energy into mechanical energy for movement, and controls the vehicle speed by changing the magnitude of the current. The charging methods of electric vehicles are divided into two categories: wired charging and wireless charging. Wireless charging, that is, non-contact charging, the principle is to install a wireless charging transmitter on the ground and a receiving board at the bottom of the vehicle. When charging is required, the vehicle is parked above the wireless charging transmitter so that the position of the receiving board corresponds to that of the wireless charging transmitter, and the wireless charging transmitter emits electromagnetic waves, and the receiving board receives the electromagnetic waves and converts them into current for charging. Because of its convenient use, the wireless charging method is accepted by more and more users.

[0003] At present, the wireless charger of an electric vehicle is fixedly installed on the ground. Due to the error of manual parking, it is impossible to ensure that the charging receiving board of the vehicle is directly facing the transmitting board of the corresponding wireless charging device, resulting in a small effective charging receiving area and low charging efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a wireless charger ground positioning system driven by a wire magnetic field to solve the problems proposed in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A wireless charger ground positioning system driven by a wire magnetic field, including a base, a stator assembly and a rotor assembly. The base is installed on a bottom plate placed on the ground, the stator assembly is installed in the middle of the base, the rotor assembly is embedded in the middle of the bottom plate, and the base slides on the bottom plate through the cooperation of the stator assembly and the rotor assembly; Limiting mechanisms for fixing on the bottom plate are symmetrically arranged on both sides of the base. The limiting mechanism includes an electric telescopic rod and a limiting hole. The limiting hole is opened on the bottom plate. When the base is in the initial position, the output end of the electric telescopic rod inserts downward into the corresponding limiting hole; Guide chutes parallel to the sliding direction of the base are opened on both sides of the bottom surface of the base, and guide rails protruding from the corresponding positions on the bottom plate are formed to be embedded in the guide chutes; A wireless transmitting board is arranged above the base, a sealing board is installed at the bottom of the wireless transmitting board, a lifting mechanism for driving the wireless transmitting board to lift is arranged between the sealing board and the base, and alignment sensors are respectively installed at both ends of the wireless transmitting board.

[0006] Preferably, the stator assembly is composed of a number of N and S magnetic poles arranged alternately and distributed, and coils wound around the magnetic poles.

[0007] Preferably, the rotor assembly is composed of a number of N and S magnetic poles arranged alternately.

[0008] Preferably, the electric telescopic rod is installed in the base through a flange, and a through hole for the output end of the electric telescopic rod to pass through is correspondingly opened on the bottom surface of the base.

[0009] Preferably, the lifting mechanism includes, but is not limited to, a lifting scissor fork assembly, an airbag assembly, and a lead screw assembly.

[0010] Preferably, an integrated controller is installed on the base, and the integrated controller is respectively connected to the control ends of the stator assembly, the electric telescopic rod, the alignment inductor, and the lifting mechanism.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] 1. The present invention sets a bottom plate on the ground, which cooperates with the base of the charging device to slide, enabling the overall device to perform alignment adjustment according to the offset position of the receiving plate, ensuring the largest effective charging receiving area and improving the charging efficiency; a limiting mechanism is set in the base, which can lock the base when the charging device is reset, avoiding offset caused by external forces when not in use.

[0013] 2. Utilizing the principle that a current-carrying conductor generates a force in a magnetic field, the stator assembly and the rotor assembly are combined to form a driving structure. By changing the direction of the coil current in the stator assembly, two-way driving adjustment can be achieved, which can be used as the power source for the overall lateral movement of the charging device. The structure is simple, the controllability is strong, and the internal structure of the charging device is greatly simplified, saving space, with low noise and strong stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the overall structural schematic diagram of the present invention;

[0015] Figure 2 is the enlarged view of part A in Figure 1 of the present invention;

[0016] Figure 3 is the structural schematic diagram of the sliding connection between the base and the bottom plate of the present invention;

[0017] Figure 4 is the schematic diagram of the overall alignment movement of the device of the present invention.

[0018] In the figure: 1. Base; 2. Bottom plate; 3. Stator assembly; 4. Rotor assembly; 5. Electric telescopic rod; 6. Limiting hole; 7. Wireless transmitting board; 8. Sealing board; 9. Lifting mechanism; 10. Alignment inductor; 11. Receiving board; 12. Guide chute; 13. Guide rail. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0021] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0022] Please refer to Figures 1-4 , the present invention provides a technical solution: a wireless charger ground positioning system driven by a wire magnetic field, including a base 1, a stator assembly 3 and a rotor assembly 4. The base 1 is installed on a bottom plate 2 placed on the ground. The stator assembly 3 is installed in the middle of the base 1. The rotor assembly 4 is embedded in the middle of the bottom plate 2. The base 1 slides on the bottom plate 2 through the cooperation of the stator assembly 3 and the rotor assembly 4. Limiting mechanisms for fixing on the bottom plate 2 are symmetrically arranged on both sides of the base 1. The limiting mechanism includes an electric telescopic rod 5 and a limiting hole 6. The limiting hole 6 is opened on the bottom plate 2. When the base 1 is in the initial position, the output end of the electric telescopic rod 5 is inserted downward into the corresponding limiting hole 6. Guide chutes 12 parallel to the sliding direction are opened on both sides of the bottom surface of the base 1. Corresponding protrusions are formed on the bottom plate 2 to form guide rails 13 embedded in the guide chutes 12. A wireless transmitting board 7 is arranged above the base 1. A sealing board 8 is installed at the bottom of the wireless transmitting board 7. A lifting mechanism 9 for driving the wireless transmitting board 7 to lift is arranged between the sealing board 8 and the base 1. Positioning sensors 10 are respectively installed at both ends of the wireless transmitting board 7.

[0023] Further, the stator assembly 3 is composed of a number of N and S magnetic poles arranged alternately and distributed, and coils wound around the magnetic poles.

[0024] Furthermore, the rotor assembly 4 is composed of a number of N and S magnetic poles arranged alternately.

[0025] Furthermore, the electric telescopic rod 5 is installed in the base 1 through a flange, and a through hole for the output end of the electric telescopic rod 5 to pass through is correspondingly opened on the bottom surface of the base 1.

[0026] Furthermore, the lifting mechanism 9 includes but is not limited to a lifting scissor fork assembly, an airbag assembly, and a lead screw assembly.

[0027] Furthermore, an integrated controller is installed on the base 1, and the integrated controller is respectively connected to the control ends of the stator assembly 3, the electric telescopic rod 5, the alignment inductor 10, and the lifting mechanism 9.

[0028] Working principle: The whole device is powered by a power supply assembly arranged in the base 1.

[0029] Using the principle that a force is generated when a current-carrying conductor is in a magnetic field, when an alternating current is applied to the coil of the stator assembly 3, a traveling magnetic field is generated in the air gap. Under the cutting of the traveling magnetic field, the rotor assembly 4 will induce an electromotive force and generate a current. The interaction between this current and the magnetic field in the air gap generates an electromagnetic thrust. If the rotor assembly 4 is fixed, the stator assembly 3 will move linearly under the action of the thrust. By changing the direction of the current (changing the alternating electromotive force induced in the armature coil into a direct current electromotive force by means of the commutation action of the commutator on the coil in cooperation with the carbon brush when it is led out from the carbon brush end), the direction of the thrust, that is, the moving direction of the stator assembly 3, can be controlled.

[0030] When the vehicle drives into place, the alignment inductors 10 (infrared inductors) at both ends of the wireless transmitting board 7 respectively monitor the positions at both ends of the vehicle charging receiving board 11, and send the signals to the integrated controller. After analysis by the integrated controller, the offset position of the receiving board 11 is judged, and then the coil in the stator assembly 3 is energized to control the direction of its current, generating a thrust on the stator assembly 3. At the same time, the limiting mechanism releases the locking of the base 1, that is, the output end of the electric telescopic rod 5 retracts from the limiting hole 6 of the bottom plate 2, so that the whole device moves horizontally along the guide rail 13 of the bottom plate 2 with the guide chute 12 of the base 1 (as Figure 4 ), until the wireless transmitting board 7 is directly opposite to the receiving board 11, ensuring the largest effective charging receiving area.

[0031] After charging is completed, the coil in the stator assembly 3 is energized again to change the direction of the current, and the whole device resets. The output end of the electric telescopic rod 5 of the limiting mechanism inserts into the limiting hole 6 of the bottom plate 2 to lock the base 1, avoiding the device from shifting due to the action of external forces when not in use, and having good stability.

[0032] It should be noted that the entire device is controlled by an integrated controller. Since the devices with which the control connections are matched are common devices and belong to existing mature technologies, the electrical connection relationships and specific circuit structures thereof will not be elaborated herein.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wireless charger ground positioning system driven by the magnetic field of a wire, comprising a base (1), a stator assembly (3) and a rotor assembly (4), characterized in that, The base (1) is installed on a bottom plate (2) placed on the ground. The stator assembly (3) is installed in the middle of the base (1), and the rotor assembly (4) is embedded in the middle of the bottom plate (2). The base (1) slides on the bottom plate (2) through the cooperation of the stator assembly (3) and the rotor assembly (4). Limiting mechanisms for fixing on the bottom plate (2) are symmetrically arranged on both sides of the base (1). The limiting mechanisms include electric telescopic rods (5) and limiting holes (6). The limiting holes (6) are opened on the bottom plate (2). When the base (1) is in the initial position, the output end of the electric telescopic rod (5) is inserted downward into the corresponding limiting hole (6). Guide chutes (12) parallel to its sliding direction are opened on both sides of the bottom surface of the base (1), and guide rails (13) that are convex at the corresponding positions on the bottom plate (2) and are embedded in the guide chutes (12) are formed. A wireless transmitting board (7) is arranged above the base (1). A sealing board (8) is installed at the bottom of the wireless transmitting board (7). A lifting mechanism (9) for driving the wireless transmitting board (7) to lift is arranged between the sealing board (8) and the base (1). Positioning sensors (10) are respectively installed at both ends of the wireless transmitting board (7). The lifting mechanism (9) includes a lifting scissor fork assembly, an air bag assembly, and a lead screw assembly.

2. The wireless charger ground positioning system driven by the magnetic field of a wire according to claim 1, characterized in that: The stator assembly (3) is composed of a number of N and S magnetic poles arranged alternately and coils wound around the magnetic poles.

3. A wireless charger ground positioning system driven by a wire magnetic field according to claim 1, characterized in that: The rotor assembly (4) is composed of a number of N and S magnetic poles arranged alternately.

4. A wireless charger ground positioning system driven by a wire magnetic field according to claim 1, characterized in that: The electric telescopic rod (5) is installed in the base (1) through a flange, and a through hole for the output end of the electric telescopic rod (5) to pass through is correspondingly opened on the bottom surface of the base (1).

5. The wireless charger ground positioning system driven by the magnetic field of a wire according to claim 1, wherein: A power supply assembly is provided in the base (1).

6. The wireless charger ground positioning system driven by the magnetic field of a wire according to claim 1, wherein: An integrated controller is installed on the base (1), and the integrated controller is respectively connected to the control ends of the stator assembly (3), the electric telescopic rod (5), the positioning sensor (10), and the lifting mechanism (9).

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