CN105186710B - Single C applied to electric vehicle wireless power is staggered type power supply rail - Google Patents

Abstract

The invention relates to a single-C staggered arrangement type power supply rail applied to wireless power supply of electric vehicles, belonging to the field of wireless power transmission of electric vehicles. The problem of large track width, poor electromagnetic compatibility, serious magnetic flux leakage, high level of electromagnetic radiation on both sides of the road and difficult construction in the existing electric vehicle wireless power transmission device is solved. The magnetic pole is a rectangular block with a C-shaped opening direction; on the power supply track, multiple magnetic poles are arranged in sequence according to preset intervals along the length of the power supply cable, and the C-shaped opening directions of two adjacent magnetic poles are opposite. Two-way straight line routing is adopted. One power supply cable located inside the magnetic pole and one power supply cable located under the power supply rail form a current loop. The currents flowing through the two power supply cables are equal in magnitude and opposite in direction; The cable generates an alternating magnetic field on the magnetic poles, and the directions of the magnetic fields on adjacent magnetic poles are opposite, and the wireless transmission of electric energy is realized through magnetic field coupling. used in electric vehicles.

Description

Single C staggered power supply track for wireless power supply of electric vehicles

technical field

The invention belongs to the field of electric vehicle wireless power transmission.

Background technique

At present, there are two major bottlenecks in the development of electric vehicles. One is the battery on the vehicle. From the perspective of recent technology, there are many problems such as volume, weight, price, material, safety, charging speed, and lifespan. In addition, the production of batteries The process is a process of high pollution, resource consumption, and damage to the ecological environment. These characteristics bring difficulties to the industrialization of electric vehicles; the other is the problem of charging infrastructure on the ground. On the one hand, due to the long charging time, a large amount of charging or Power exchange facilities bring great difficulties to municipal construction. These facilities occupy a large amount of ground area, are not conducive to unified management, and have high operation and maintenance costs. On the other hand, electric vehicles need frequent parking and charging, which brings great inconvenience It is a great inconvenience, and the short mileage makes it impossible to travel long distances. The electric vehicle wireless power supply technology just solves these two bottleneck problems.

The dynamic and static wireless power supply system of electric vehicles can enable electric vehicles to supply power in real time or supplement electric energy for batteries no matter in the parking lot, parking space, waiting for red lights or driving on the road. This technology can not only greatly increase the driving range of the vehicle, but also greatly reduce the number of on-board power batteries to a fraction of the original amount, and there will be no charging stations or replacement stations on the ground. . All power supply facilities are below ground level. Moreover, the driver no longer needs to consider the charging problem, and the power problem is automatically solved by the power supply network under the ground. In the realization of wireless power supply for electric vehicles, the wireless power transmission structure plays an extremely important role in the performance and construction cost of the system. Intensity, degree of impact on the environment, etc.

Contents of the invention

The purpose of the present invention is to solve the problems of poor electromagnetic compatibility, difficult construction, waste of magnetic pole materials and improvement of the coupling coefficient of the existing electric vehicle wireless power transmission device. power track.

A single C staggered power supply track applied to wireless power supply of electric vehicles, which includes a long magnetic core, a power supply cable and multiple magnetic poles;

The magnetic pole is a rectangular block with a C-shaped opening direction;

On the elongated magnetic core, a plurality of magnetic poles are arranged in sequence along the length direction of the power supply cable according to the preset interval d, and the directions of the C-shaped openings of the two adjacent magnetic poles are opposite.

The preset interval d is the distance between the tail end of the previous magnetic pole and the head end of the next magnetic pole among two adjacent magnetic poles along the length direction of the elongated magnetic core,

The power supply cable adopts two-way straight line routing. One power supply cable located inside the magnetic pole and one power supply cable located under the long magnetic core form a current loop. The currents flowing through the two power supply cables are equal in magnitude and opposite in direction ;

The alternating current passes through the power supply cable to generate an alternating magnetic field on the magnetic poles, and the directions of the magnetic fields on adjacent magnetic poles are opposite, and the wireless transmission of electric energy is realized through magnetic field coupling.

The working principle is:

The alternating current generates an alternating magnetic field through the power supply cable. Under the constraint of the ferrite core, the magnetic flux is limited as much as possible above the track. At this time, if there is a power receiving unit above the track, it will The current can be induced on the receiving unit, see Figure 5 to Figure 8 for details. Efficient wireless transmission of electric energy can be realized through reasonable parameter configuration.

Compared with prior art, the beneficial effect that the present invention brings is:

1. The width of the single C staggered power supply track is very narrow, which greatly saves the raw materials required for the production of the power supply track, and at the same time greatly reduces the difficulty of construction.

2. The power supply cables in the power supply track are routed in a straight line without coiling, which greatly facilitates the production, installation and maintenance of the power supply track.

3. Small leakage of magnetic field and good electromagnetic compatibility.

Description of drawings

Fig. 1 is a three-dimensional perspective view of a single C staggered arrangement type power supply track applied to electric vehicle wireless power supply according to the present invention;

Fig. 2 is the front view of Fig. 1;

Fig. 3 is the top view of Fig. 1;

Fig. 4 is the side view of Fig. 1;

Fig. 5 is a diagram of the relative position relationship between the single-C staggered arrangement type power supply track and a two-phase four-coil receiving device applied to the wireless power supply of electric vehicles according to the present invention;

Fig. 6 is the front view of Fig. 5;

Figure 7 is a top view of Figure 5;

Figure 8 is a side view of Figure 5;

9 and 12 are structural schematic diagrams of the magnetic poles described in Embodiment 7;

Fig. 10 and Fig. 11 are structural schematic diagrams of the magnetic poles described in the eighth specific embodiment.

Detailed ways

Specific Embodiment 1: Referring to Fig. 1 to Fig. 4 to illustrate this embodiment, the single-C staggered arrangement type power supply track applied to electric vehicle wireless power supply described in this embodiment includes a strip magnetic core 3, a power supply cable 2 and a plurality of poles 1;

The magnetic pole 1 is a rectangular block with a C-shaped opening direction;

On the elongated magnetic core 3, a plurality of magnetic poles 1 are arranged in sequence along the length direction of the power supply cable 2 according to a preset interval d, and the directions of the C-shaped openings of the two adjacent magnetic poles 1 are opposite.

The preset interval d is the distance between the tail end of the previous magnetic pole 1 and the head end of the next magnetic pole 1 among the two adjacent magnetic poles 1 along the length direction of the elongated magnetic core 3 ,

The power supply cable 2 adopts a two-way straight line routing method. One power supply cable 2 inside the magnetic pole 1 and one power supply cable 2 below the elongated magnetic core 3 form a current loop. The two power supply cables 2 flow through Currents are equal in magnitude and opposite in direction;

The alternating current passes through the power supply cable 2 to generate an alternating magnetic field on the magnetic pole 1, and the direction of the magnetic field on the adjacent magnetic pole 1 is opposite, and the wireless transmission of electric energy is realized through magnetic field coupling.

In this embodiment, a long-distance power supply track can be formed by sequentially laying multiple single-C staggered power supply tracks controlled by independent switches, and cooperating with a corresponding control system.

The two power supply cables 2 form a current loop. When working, the currents in the two power supply cables 2 are equal in magnitude at any time, and the direction goes back and forth.

The magnetic pole 1 can be realized by using a ferrite core.

Specific embodiment 2: The difference between this embodiment and the specific embodiment is that the single C staggered power supply track applied to the wireless power supply of electric vehicles is that the width of the upper end surface of the C-shaped opening of the magnetic pole 1 is greater than or It is equal to the width of the strip magnetic core 3 .

Strip Magnetic Core 3 In this embodiment, the width of the strip magnetic core 3 is very narrow, which greatly saves the raw materials required for the production of the power supply track, and at the same time greatly reduces the difficulty of construction.

Embodiment 3: The difference between this embodiment and the single-C staggered arrangement type power supply track applied to the wireless power supply of electric vehicles described in Embodiment 1 is that the width of the upper end surface of the C-shaped opening of the magnetic pole 1 is larger than the The width of the lower end face of the magnetic pole 1C-shaped opening.

In this embodiment, the width of the upper end surface of the magnetic pole 1 is greater than the width of the lower end surface of the magnetic pole 1 , which saves the raw materials required for the production of the single-C staggered arrangement type power supply track, and greatly reduces the construction difficulty.

Embodiment 4: The difference between this embodiment and the single-C staggered arrangement type power supply track applied to electric vehicle wireless power supply described in Embodiment 1 is that the elongated magnetic core 3 is a cuboid structure.

In this embodiment, the advantage of the long straight track is that it is easy to manufacture on the one hand, and on the other hand, in practical situations, the long straight track meets most application requirements.

Embodiment 5: The difference between this embodiment and the single-C staggered arrangement type power supply track applied to the wireless power supply of electric vehicles described in Embodiment 1 is that the elongated magnetic core 3 is realized by a ferrite core .

In this embodiment, when the single-C staggered arrangement type power supply track described in the present invention works normally, the magnetic field generated by the current in the power supply cable 2 is guided by the ferrite core, so that the adjacent magnetic poles on the elongated magnetic core 3 The direction of the magnetic field on the track is opposite, and the direction of the magnetic field at a certain moment on the track is shown in Figure 6.

Embodiment 6: The difference between this embodiment and the single-C staggered arrangement type power supply track applied to electric vehicle wireless power supply described in Embodiment 1 is that the power supply cable 2 is realized by multi-turn winding.

In this embodiment, the power supply cable 2 can be wound in multiple turns, not limited to one turn.

Specific Embodiment 7: Refer to Fig. 9 and Fig. 12 to illustrate this embodiment. The difference between this embodiment and the single-C staggered arrangement type power supply track applied to electric vehicle wireless power supply described in Embodiment 1 is that the magnetic pole 1 The height is greater than or equal to the vertical height of the C-shaped opening of the magnetic pole 1, the bottom of the magnetic pole 1 is flush with the bottom of the elongated magnetic core 3, and the C-shaped opening of the magnetic pole 1 is located on the elongated magnetic core 3.

Embodiment 8: Refer to Fig. 10 and Fig. 11 to illustrate this embodiment. The difference between this embodiment and the single-C staggered power supply track applied to electric vehicle wireless power supply described in Embodiment 7 is that the magnetic pole 1 The side walls of the strips are embedded in the strip magnetic core 3 .

Claims (7)

1. A single C staggered power supply track applied to wireless power supply of electric vehicles, characterized in that it includes a strip magnetic core (3), a power supply cable (2) and a plurality of magnetic poles (1); The magnetic pole (1) is a rectangular block with a C-shaped opening direction; On the elongated magnetic core (3), a plurality of magnetic poles (1) are arranged in sequence along the length direction of the power supply cable (2) according to the preset interval d, and the C-shaped openings of two adjacent magnetic poles (1) are in opposite directions , The preset interval d is the tail end of the previous magnetic pole (1) and the head end of the next magnetic pole (1) among the two adjacent magnetic poles (1) along the length direction of the elongated magnetic core (3). the distance between, The power supply cable (2) adopts a two-way straight line routing method, and one power supply cable (2) located inside the magnetic pole (1) and one power supply cable (2) located under the elongated magnetic core (3) form a current loop , the currents flowing through the two power supply cables (2) are equal in magnitude and opposite in direction; The alternating current passes through the power supply cable (2) to generate an alternating magnetic field on the magnetic pole (1), and the direction of the magnetic field on the adjacent magnetic pole (1) is opposite, and the wireless transmission of electric energy is realized through magnetic field coupling; The width of the upper end surface of the C-shaped opening of the magnetic pole (1) is greater than the width of the lower end surface of the C-shaped opening of the magnetic pole (1). 2. The single C staggered arrangement type power supply track applied to electric vehicle wireless power supply according to claim 1, characterized in that, the width of the upper end surface of the C-shaped opening of the magnetic pole (1) is greater than or equal to the elongated The width of the magnetic core (3). 3. The single-C staggered arrangement type power supply track applied to electric vehicle wireless power supply according to claim 1, characterized in that, the strip-shaped magnetic core (3) is a cuboid structure. 4. The single-C staggered arrangement type power supply track applied to electric vehicle wireless power supply according to claim 1, characterized in that, the elongated magnetic core (3) is realized by a ferrite core. 5. The single-C staggered arrangement type power supply track applied to electric vehicle wireless power supply according to claim 1, characterized in that, the power supply cable (2) is realized by multi-turn winding. 6. The single C staggered power supply track applied to electric vehicle wireless power supply according to claim 1, characterized in that the height of the magnetic pole (1) is greater than or equal to the height of the C-shaped opening of the magnetic pole (1). Vertical height, the bottom of the magnetic pole (1) is flush with the bottom of the elongated magnetic core (3), and the C-shaped opening of the magnetic pole (1) is located on the elongated magnetic core (3). 7. The single-C staggered arrangement type power supply track applied to electric vehicle wireless power supply according to claim 6, characterized in that, the side walls of the magnetic poles (1) are embedded in the elongated magnetic cores (3).