CN204858757U - Magnetic pole winding T-shaped power supply rail for wireless power supply of electric vehicles - Google Patents

Abstract

The magnetic pole winding type T-shaped power supply track applied to the wireless power supply of electric vehicles belongs to the technical 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. It includes a strip-shaped magnetic core, a power supply cable and a plurality of T-shaped magnetic poles; on the strip-shaped magnetic core, a plurality of T-shaped magnetic poles are arranged in sequence according to a preset interval d along the length of the strip-shaped magnetic core, and the power supply line The winding arrangement of the cable is divided into upper and lower layers. One power supply cable on the upper layer winds multiple T-shaped magnetic poles in sequence along the direction from the head end to the end of the long strip magnetic core, and one power supply cable on the lower layer runs along the length A plurality of T-shaped magnetic poles are sequentially wound in the direction from the end to the head of the strip magnetic core, and the end of one power supply cable of the upper layer is connected with the head end of one power supply cable of the lower layer. It is mainly used in electric vehicles.

Description

Magnetic pole winding T-shaped power supply rail for wireless power supply of electric vehicles

technical field

The utility model belongs to the technical 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 and many other aspects.

Utility model content

The present invention aims to solve the problems 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. The utility model provides a A magnetic pole winding T-shaped power supply track applied to wireless power supply of electric vehicles.

Magnetic pole winding T-shaped power supply track applied to wireless power supply of electric vehicles, which includes a long magnetic core, power supply cable and multiple T-shaped magnetic poles;

On the elongated magnetic core, a plurality of T-shaped magnetic poles are arranged in sequence along the length direction of the elongated magnetic core according to a preset interval d,

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

The power supply cable adopts the magnetic pole winding method. The winding arrangement of the power supply cable is divided into upper and lower layers. The T-shaped magnetic poles are wound in sequence, and the power supply cable of the lower layer is wound along the direction from the end to the head of the strip magnetic core, and the multiple T-shaped magnetic poles are wound in turn, and the end of the power supply cable of the upper layer is connected with the power supply cable of the lower layer. head end connection,

The first end of the power supply cable of the upper layer and the end of the power supply cable of the lower layer are used to receive electric energy.

One power supply cable on the upper layer and one power supply cable on the lower layer form a current loop, and 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 T-shaped magnetic pole, and the direction of the magnetic field on the adjacent T-shaped magnetic pole is 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, while reducing the magnetic flux leakage below the track. At this time, if there is electric energy above the track For the receiving unit, see Figures 5 to 8 for details, current can be induced on the receiving unit under the action of magnetic field coupling, and efficient wireless transmission of electric energy can be realized through reasonable parameter configuration.

Compared with the prior art, the utility model has the following advantages.

1. Under the same requirements, compared with other known types of power supply rails, the magnetic pole winding T-shaped power supply rail structure is adopted, and the coupling coefficient between the power supply cable and the receiving coil is higher, which is an efficient and high-power transmission of electric energy. premise.

2. The power supply cable in the power supply track adopts the magnetic pole winding method. Compared with the cross winding method, the amount of cables used to achieve the same inductance is less. At the same time, the two cables between the magnetic poles are single-wire connected. This method greatly saves the use of cables in the magnetic pole interval, which is especially prominent in the case of multi-turn large magnetic pole intervals.

3. The leakage of the magnetic field is extremely small, and the electromagnetic compatibility is good.

4. The width of the magnetic pole winding T-shaped 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.

Description of drawings

Fig. 1 is a structural schematic diagram of the magnetic pole winding type T-shaped power supply track applied to the wireless power supply of electric vehicles described in the utility model;

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 magnetic pole winding type T-shaped power supply track and a two-phase four-coil receiving device applied to the wireless power supply of electric vehicles described in the utility model;

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

Figure 7 is a top view of Figure 5;

FIG. 8 is a side view of FIG. 5 .

Detailed ways

Specific embodiment 1: Referring to Fig. 1 to Fig. 4 to illustrate this embodiment, the magnetic pole winding type T-shaped power supply track applied to the wireless power supply of electric vehicles described in this embodiment includes a long magnetic core 3 and a power supply cable 2 and a plurality of T-shaped magnetic poles 1;

On the elongated magnetic core 3, a plurality of T-shaped magnetic poles 1 are arranged in sequence along the length direction of the elongated magnetic core 3 according to a preset interval d,

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

The power supply cable 2 adopts the magnetic pole winding method. The winding arrangement of the power supply cable 2 is divided into upper and lower layers. The upper layer has a power supply cable 2 along the direction from the head end to the end of the long strip magnetic core 3. On the top, a plurality of T-shaped magnetic poles 1 are sequentially wound, and the lower layer one-way power supply cable 2 is wound along the direction from the end to the head end of the elongated magnetic core 3 to multiple T-shaped magnetic poles 1 in sequence, and the upper layer one-way power supply cable 2 The end of the lower layer is connected to the first end of the power supply cable 2,

The first end of the power supply cable 2 on the upper layer and the end of the power supply cable 2 on the lower layer are used to receive electric energy.

One power supply cable 2 on the upper layer and one power supply cable 2 on the lower layer form a current loop, and 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 T-shaped magnetic pole 1, and the direction of the magnetic field on the adjacent T-shaped 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 a plurality of independent switch-controlled magnetic pole winding T-shaped power supply tracks 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.

Specific embodiment two: Refer to Fig. 1 to Fig. 4 to illustrate this embodiment mode. The difference between this embodiment mode and the magnetic pole winding T-shaped power supply track for electric vehicle wireless power supply described in the specific embodiment mode is that the T-shaped The magnetic pole 1 has a T-shaped structure, and the power supply cable 2 is wound on the vertical pole of the T-shaped structure.

In this embodiment, the T-shaped structure 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.

Specific embodiment three: Referring to Fig. 1 to Fig. 4 to illustrate this embodiment, the difference between this embodiment and the magnetic pole winding T-shaped power supply track for electric vehicle wireless power supply described in the second specific embodiment is that the T-shaped The width of the horizontal bar of the type structure in the direction perpendicular to the length of the strip magnetic core 3 is greater than or equal to the width of the strip magnetic core 3 .

In this embodiment, the width of the power supply track 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.

Specific Embodiment 4: Refer to Fig. 1 to Fig. 4 to illustrate this embodiment. The difference between this embodiment and the magnetic pole winding T-shaped power supply track for electric vehicle wireless power supply described in Embodiment 2 is that the T-shaped The width of the vertical bar of the structure in the direction perpendicular to the length of the elongated magnetic core 3 is less than or equal to the width of the elongated magnetic core 3 .

Specific Embodiment 5: Refer to Fig. 1 to Fig. 4 to illustrate this embodiment. The difference between this embodiment and the magnetic pole winding T-shaped power supply track for wireless power supply of electric vehicles described in Embodiment 1, 2 or 3 is that the Both the T-shaped magnetic pole 1 and the elongated magnetic core 3 mentioned above are realized by ferrite magnetic poles.

In this embodiment, when the pole-wound T-shaped power supply track of the present invention is working normally, the magnetic field generated by the current in the power supply cable 2 is guided by the ferrite core, so that the magnetic field direction on the adjacent magnetic poles on the power supply track 5 In contrast, the direction of the magnetic field at a certain moment on the track is shown in Figure 6.

Specific embodiment six: Referring to Fig. 1 to Fig. 4 to illustrate this embodiment, the difference between this embodiment and the magnetic pole winding type T-shaped power supply track for wireless power supply of electric vehicles described in the first embodiment is that the long strip Shaped magnetic core 3 is a long straight track.

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.

Specific embodiment 7: Refer to Fig. 1 to Fig. 4 to illustrate this embodiment. The number of turns of the power supply cable 2 wound on the magnetic pole 1 is greater than or equal to two turns.

Embodiment 8: Refer to Fig. 1 to Fig. 4 to illustrate this embodiment. The difference between this embodiment and the magnetic pole-wound T-shaped power supply track for electric vehicle wireless power supply described in Embodiment 2 is that the power supply cable described 2 is realized by the way of multi-turn winding.

Claims (8)

1. A pole-wound T-shaped power supply track applied to wireless power supply of electric vehicles, which includes a long magnetic core (3), a power supply cable (2) and a plurality of T-shaped magnetic poles (1); It is characterized in that, on the elongated magnetic core (3), a plurality of T-shaped magnetic poles (1) are arranged in sequence along the length direction of the elongated magnetic core (3) according to a preset interval d, The preset interval d is the distance between the tail end of the previous T-shaped magnetic pole (1) and the rear T-shaped magnetic pole among the two adjacent T-shaped magnetic poles (1) along the length direction of the elongated magnetic core (3). The distance between the head ends of (1), The power supply cable (2) adopts the magnetic pole winding method, and the winding arrangement of the power supply cable (2) is divided into upper and lower layers. ) in the direction from the head end to the end, winding multiple T-shaped magnetic poles (1) sequentially, and the power supply cable (2) of the lower layer is along the direction from the end to the head end of the elongated magnetic core (3), winding multiple The T-shaped magnetic poles (1) are wound sequentially, and the end of the upper-layer power supply cable (2) is connected to the head end of the lower-layer power supply cable (2), The first end of one power supply cable (2) on the upper layer and the end of one power supply cable (2) on the lower layer are used to receive electric energy, One power supply cable (2) on the upper layer and one power supply cable (2) on the lower layer form a current loop, and 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 T-shaped magnetic pole (1), and the direction of the magnetic field on the adjacent T-shaped magnetic pole (1) is opposite, and wireless transmission of electric energy is realized through magnetic field coupling. 2. The magnetic pole winding T-shaped power supply track applied to electric vehicle wireless power supply according to claim 1, characterized in that, the T-shaped magnetic pole (1) is a T-shaped structure, and the power supply cable (2) is in the Winding on the vertical pole of the T-shaped structure. 3. The pole-wound T-shaped power supply track applied to wireless power supply of electric vehicles according to claim 2, characterized in that, the crossbar of the T-shaped structure is perpendicular to the length of the elongated magnetic core (3). The width in the direction is greater than or equal to the width of the elongated magnetic core (3). 4. The pole-wound T-shaped power supply track applied to wireless power supply of electric vehicles according to claim 2, characterized in that, the vertical bar of the T-shaped structure is perpendicular to the length direction of the elongated magnetic core (3) The width above is less than or equal to the width of the strip magnetic core (3). 5. The pole-wound T-shaped power supply track applied to electric vehicle wireless power supply according to claim 1, 2 or 3, characterized in that the T-shaped magnetic pole (1) and the elongated magnetic core (3) Both are implemented with ferrite poles. 6. The pole-wound T-shaped power supply track applied to wireless power supply of electric vehicles according to claim 1, characterized in that, the elongated magnetic core (3) is a long straight track. 7. The pole-wound T-shaped power supply track applied to electric vehicle wireless power supply according to claim 1, characterized in that, the number of turns of the power supply cable (2) wound on each T-shaped magnetic pole (1) Greater than or equal to two turns. 8. The pole-wound T-shaped power supply track applied to wireless power supply for electric vehicles according to claim 1, characterized in that the power supply cable (2) is realized in a multi-turn winding manner.