CN105186708B - Double C parallel connections applied to electric automobile wireless power are alternately arranged type power supply rail - Google Patents

Abstract

The invention relates to a double-C parallel alternately arranged power supply track applied to wireless power supply of electric vehicles, and 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 N T-shaped magnetic poles, M double-C-shaped magnetic poles, power supply cables and strip-shaped magnetic cores; on the strip-shaped magnetic poles, N T-shaped magnetic poles and M double-C-shaped magnetic poles The direction is arranged in sequence according to the preset interval d, and one end of the power supply cable passes through the C-shaped port on the side of the M double C-shaped magnetic poles and the side of the N T-shaped magnetic poles, and then passes through the staggered settings in reverse. The C-shaped opening on the other side of the M double C-shaped magnetic poles and the other side of the N T-shaped magnetic poles pass through. It is mainly used in electric vehicles.

Description

Double C parallel alternate arrangement type power supply track applied to electric vehicle wireless power supply

technical field

The invention 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. The above performance can be greatly improved by rationally designing the structure of the ferrite core of the power supply track and the structure of the power receiving device.

Contents of the invention

The purpose of the present invention is to solve the problems that the existing electric vehicle wireless power transmission device is difficult to construct, difficult to maintain in the later stage, and unfavorable for the laying of power supply tracks in special environments such as bridges. C Parallel alternately arranged power rails.

The dual-C parallel alternately arranged power supply track applied to the wireless power supply of electric vehicles includes N T-shaped magnetic poles, M double-C-shaped magnetic poles, power supply cables and long strip magnetic cores; N and M are both positive integers, and M The absolute value of the difference with N is less than or equal to 1;

The double C-shaped magnetic pole includes two rectangular blocks with a C-shaped opening direction, and the two rectangular blocks with a C-shaped opening direction are arranged opposite to each other;

On the strip-shaped magnetic core, N T-shaped magnetic poles and M double-C-shaped magnetic poles are arranged alternately along the length direction of the power supply cable according to the preset interval d, and the preset interval d is along the length of the strip-shaped magnetic core. Among any adjacent T-shaped magnetic poles and double C-shaped magnetic poles in the length direction, the distance between the tail end of the previous T-shaped magnetic pole and the head end of the next double C-shaped magnetic pole;

One end of the power supply cable passes through the C-shaped port on one side of the M double C-shaped magnetic poles arranged staggered and the side of the N T-shaped magnetic poles in turn, and then passes through the opposite side of the M double C-shaped magnetic poles arranged in a staggered manner. The other side of the C-shaped mouth and N T-shaped magnetic poles passes through;

The alternating current passes through the power supply cable, and the magnetic field generated by the current in the power supply cable is guided through the long strip magnetic core, so that an alternating magnetic field is generated between the T-shaped magnetic poles and the double C-shaped magnetic poles on the long strip magnetic core. The direction of the magnetic field on any adjacent T-shaped magnetic pole and double C-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 The receiving unit induces a current on the receiving unit through magnetic field coupling, see Figure 5 to Figure 8 for details. Efficient wireless transmission of electric energy can be realized through reasonable parameter configuration.

Compared with the prior art, the present invention has the following advantages.

1. Under the same requirements, compared with other known types of power supply rails, the double C parallel alternate arrangement type power supply rail structure is adopted, and the coupling coefficient between the power supply cable and the receiving coil is higher.

2. The power supply cable in the power supply track is straight and does not need to be coiled, which greatly facilitates the production, installation and maintenance of the power supply track.

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

4. The width of the double C parallel alternate arrangement type 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 schematic structural diagram of a dual-C parallel alternately arranged 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 positional relationship between the double-C parallel alternately arranged 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;

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

detailed description

Specific Embodiment 1: Refer to Figures 1 to 4 to illustrate this embodiment. The dual-C parallel and alternately arranged power supply track applied to the wireless power supply of electric vehicles described in this embodiment includes N T-shaped magnetic poles 1 and M double-C Type magnetic pole 2, power supply cable 3 and strip magnetic core 4; both N and M are positive integers, and the absolute value of the difference between M and N is less than or equal to 1;

The double C-shaped magnetic pole 2 includes two rectangular blocks 2-1 with a C-shaped opening direction, and the two rectangular blocks 2-1 with a C-shaped opening direction are arranged oppositely;

On the elongated magnetic core 4, N T-shaped magnetic poles 1 and M double C-shaped magnetic poles 2 are arranged alternately along the length direction of the power supply cable 3 according to the preset interval d, and the preset interval d is along the length In any adjacent T-shaped magnetic pole 1 and double C-shaped magnetic pole 2 in the length direction of the strip magnetic core 4, the distance between the tail end of the previous T-shaped magnetic pole 1 and the head end of the next double C-shaped magnetic pole 2;

One end of the power supply cable 3 sequentially passes through the C-shaped opening on one side of the M double C-shaped magnetic poles 2 and the side of the N T-shaped magnetic poles 1, and then reversely passes through the M double C-shaped magnetic poles 2 staggered The C-shaped port on the other side and the N T-shaped magnetic poles 1 pass through the other side;

The alternating current passes through the power supply cable 3, and the magnetic field generated by the current in the power supply cable 3 is guided through the elongated magnetic core 4, so that between the T-shaped magnetic pole 1 and the double C-shaped magnetic pole 2 on the elongated magnetic core 4 An alternating magnetic field is generated, and the direction of the magnetic field on any adjacent T-shaped magnetic pole 1 and double C-shaped magnetic pole 2 is opposite, and the wireless transmission of electric energy is realized through magnetic field coupling.

In this embodiment, the power supply cable 3 adopts a two-way straight line routing method, and the currents flowing through the two power supply cables 3 are equal in magnitude and opposite in direction;

A long-distance power supply track can be formed by laying the double-C parallel alternately arranged power supply tracks controlled by multiple sections of independent switches in sequence, and cooperating with the corresponding control system.

When the double-C parallel alternately arranged power supply track is working normally, the magnetic field generated by the current in the power supply cable is guided through the ferrite core, so that it is generated between the T-shaped magnetic pole 1 and the double-C-shaped magnetic pole 2 on the power supply track 4. Alternating magnetic field, the direction of the magnetic field on any adjacent T-shaped magnetic pole 1 and double C-shaped magnetic pole 2 is opposite, and the wireless transmission of electric energy is realized through magnetic field coupling. As shown in Figure 6.

Specific embodiment 2: Referring to Fig. 1 to Fig. 4 to illustrate this embodiment, the difference between this embodiment and the dual-C parallel alternate arrangement type power supply track applied to the wireless power supply of electric vehicles described in the specific embodiment 1 is that the N The T-shaped magnetic poles 1, the M double C-shaped magnetic poles 2 and the elongated magnetic core 4 are all realized by ferrite magnetic cores.

Specific Embodiment 3: Refer to Fig. 1 to Fig. 4 to illustrate this embodiment. The difference between this embodiment and the double-C parallel alternately arranged power supply track applied to electric vehicle wireless power supply described in Embodiment 1 or 2 is that the The width of the elongated magnetic core 4 is less than or equal to the width of the upper end surface of the C-shaped opening of the rectangular block 2-1.

In this embodiment, the width of the power supply track 4 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: Referring to Fig. 1 to Fig. 4 to illustrate this embodiment, the difference between this embodiment and the dual-C parallel alternately arranged power supply track applied to electric vehicle wireless power supply described in Embodiment 1 or 2 is that the The width of the upper end surface of the C-shaped opening of the rectangular block 2-1 is greater than the width of the lower end surface of the C-shaped opening of the rectangular block 2-1.

In this embodiment, the width of the upper end surface of the C-shaped opening of the rectangular block 2-1 is greater than the width of the lower end surface of the C-shaped opening of the rectangular block 2-1, which saves the double C parallel alternately arranged power supply rail as the required raw material, At the same time, the difficulty of construction is greatly reduced.

Specific Embodiment 5: Refer to Fig. 1 to Fig. 4 to illustrate this embodiment. The difference between this embodiment and the dual-C parallel alternately arranged power supply track applied to electric vehicle wireless power supply described in Embodiment 1 or 2 is that the The elongated magnetic core 4 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 6: Refer to Fig. 1 to Fig. 4 to illustrate this embodiment. The difference between this embodiment and the double-C parallel alternating arrangement type power supply track applied to electric vehicle wireless power supply described in Embodiment 1 is that the power supply The cable 3 is realized by multi-turn winding.

In this embodiment, the power supply cable 3 can be realized by winding with multiple turns, not limited to one turn.

Specific embodiment 7: Refer to Fig. 1 to Fig. 4 to illustrate this embodiment. The difference between this embodiment and the dual-C parallel alternating arrangement type power supply track applied to the wireless power supply of electric vehicles described in the specific embodiment 1 is that the rectangular The height of the block 2-1 is greater than the vertical height of the C-shaped opening of the rectangular block 2-1, the bottom of the rectangular block 2-1 is flush with the bottom of the strip magnetic core 4, and the bottom of the rectangular block 2-1 The C-shaped opening is located on the elongated magnetic core 4 .

In this embodiment, the bottom of the C-shaped opening of the rectangular block 2-1 is located between the upper and lower borders of the rectangular block 2-1 in the height direction.

Embodiment 8: Refer to Fig. 1 to Fig. 4 to illustrate this embodiment. The difference between this embodiment and the dual-C parallel alternate arrangement type power supply track applied to electric vehicle wireless power supply described in Embodiment 7 is that the rectangular The side walls of the block 2 - 1 are embedded in the elongated magnetic core 4 .

Claims (8)

1. double C parallel connections applied to electric automobile wireless power are alternately arranged type power supply rail, it is characterised in that it includes N number of T Type magnetic pole (1), M double C-type magnetic pole (2), power cable (3) and strip magnetic core (4)；N and M are the difference of positive integer, M and N The absolute value of value is less than or equal to 1；

Described double C-type magnetic pole (2) includes two rectangular blocks (2-1) with c-opening direction, and two have c-type The rectangular blocks (2-1) of opening direction are oppositely arranged；

On strip magnetic core (4), N number of T-shaped magnetic pole (1) and M double C-type magnetic pole (2) are pressed along along power cable (3) length direction Spaced successively according to predetermined interval d, described predetermined interval d is the T of the arbitrary neighborhood along along strip magnetic core (4) length direction In type magnetic pole (1) and double C-type magnetic pole (2), the head end of the tail end of previous T-shaped magnetic pole (1) and latter double C-type magnetic pole (2) it Between distance；

One end of power cable (3) sequentially passes through the c-type mouthful and N number of T-shaped magnetic pole for M double C-type magnetic pole (2) side being staggered (1) passed back through behind side M double C-type magnetic pole (2) opposite side being staggered c-type mouthful and N number of T-shaped magnetic pole (1) it is another Passed behind side；

Alternating current is by power cable (3), and the magnetic field that the electric current in power cable (3) is produced is drawn by strip magnetic core (4) Lead so that the magnetic field of alternation, arbitrary neighborhood are produced between the T-shaped magnetic pole (1) and double C-type magnetic pole (2) on strip magnetic core (4) T-shaped magnetic pole (1) and double C-type magnetic pole (2) on magnetic direction on the contrary, realizing being wirelessly transferred for electric energy by magnetic coupling.

2. double C parallel connections according to claim 1 applied to electric automobile wireless power are alternately arranged type power supply rail, its It is characterised by, described N number of T-shaped magnetic pole (1), M double C-type magnetic pole (2) and strip magnetic core (4) is real using FERRITE CORE It is existing.

3. double C parallel connections according to claim 1 or 2 applied to electric automobile wireless power are alternately arranged type power rail Road, it is characterised in that the width of described strip magnetic core (4) is less than or equal to the upper of the c-opening of rectangular blocks (2-1) The width of end face.

4. double C parallel connections according to claim 1 or 2 applied to electric automobile wireless power are alternately arranged type power rail Road, it is characterised in that the width of the upper surface of the c-opening of described rectangular blocks (2-1) is more than the rectangular blocks (2- 1) width of the lower surface of c-opening.

5. double C parallel connections according to claim 1 applied to electric automobile wireless power are alternately arranged type power supply rail, its It is characterised by, described strip magnetic core (4) is long and straight type track.

6. double C parallel connections according to claim 1 applied to electric automobile wireless power are alternately arranged type power supply rail, its It is characterised by, described power cable (3) is realized by the way of multiturn coiling.

7. double C parallel connections according to claim 1 applied to electric automobile wireless power are alternately arranged type power supply rail, its It is characterised by, the height of described rectangular blocks (2-1) is more than the vertical height of the c-opening of the rectangular blocks (2-1), The bottom of rectangular blocks (2-1) is concordant with strip magnetic core (4) bottom, and the c-opening of rectangular blocks (2-1) is located at strip On shape magnetic core (4).

8. double C parallel connections according to claim 7 applied to electric automobile wireless power are alternately arranged type power supply rail, its It is characterised by, the side wall of described rectangular blocks (2-1) is embedded in strip magnetic core (4).