KR20120116676A - Non contacting method for power supplied road for online electric vehicle - Google Patents

Abstract

PURPOSE: A power supply road for an electric car of a non-contact type is provided to easily shield an electromagnetic field generated in a common line without the installation of an additional shielding coil and a copper shielding net by covering the common line with an aluminum protecting tube. CONSTITUTION: A power supply road(100) for an electric car of a non-contact type comprises a power supply core(110), a power supply line(120), a common line(140), and an aluminum protecting tube(150). The power supply core is made of a ferrite magnetic substance using Mn(Manganese)-Zn(Zinc) materials. The power supply line is made of a cable for a litz wire high frequency. The power supply line is surrounded by a FRP(Fiber Reinforced Plastic) pipe(130). The common line is provided in order to constitute the power supply road into a segment. The aluminum protecting tube surrounds the common line in order to shield an electromagnetic field.

Description

Non Contacting Method for Power Supplied Road for Online Electric Vehicle}

The present invention relates to a feeding road for an electric vehicle of a non-contact type, and more particularly, by wrapping the common line in an aluminum protective tube, it is possible to easily shield the electromagnetic field generated in the common line without the need to install additional shielding coil and copper shielding network. And, it is possible to use the aggregate concrete to improve the strength when construction of the power supply road relates to a non-contact electric vehicle feed road that can prevent the cracks occurring in the lower part of the feed road from the structural aspect of the feed road.

Recently, with the focus on GHG and environmental pollution and green policies and green growth, national policies for reducing CO ₂ have been announced, suggesting green vision as a new growth engine to overcome the economic crisis both at home and abroad.

As one of the measures for this, a rechargeable electric vehicle is currently being developed in which a battery is operated by charging electricity in a vehicle in Korea and overseas. Such rechargeable electric vehicles are charged in a separate charging station or at home, or replace batteries.

However, non-contact power transfer using magnetic induction to solve the problems such as excessive battery capacity, which resulted from the biggest problem of conventional battery electric vehicles, resulting in vehicle weight or volume, increased cost and long charging time or low charging efficiency, and shortened battery life. The method is proposed.

In the conventional electric vehicle power feeding device, a pair of feeders is installed on an E-shaped core that is 50 cm to 1 m long on a base plate installed at the bottom of the road so as to extend along the road, and a current collector is installed on the E-shaped core. The coil is configured to charge the battery of the electric vehicle by the power supplied from the power feeding device in a magnetic induction manner.

Such a magnetic induction method has been used in a special working environment that requires a non-contact power source for industrial use, there are a number of problems in applying it to a general electric vehicle by installing it on a general road. Since a vehicle using other energy sources is also running on a general road, there is a problem in that it is not possible to dig a groove or install a rail on the road for driving safety of the vehicle.

Therefore, the surface of the feed coil to be installed on the road must be flat as in the general road. In addition, due to the weight change or fluctuation of the electric vehicle, the distance between the current collector coil and the power supply coil may be varied in the left and right directions, and the influence of the power transmission device may need to be considered.

To solve this problem, the PATH team at Berkeley University in the United States designed a device that can bury a large coil of about 1m on the floor and deliver power with 60% efficiency even when the gap or left and right changes two to three inches. It was. However, as a result, it is pointed out that the road construction cost is excessively over 1 billion to 1.5 billion won / km, and it is insufficient for practical use at 60% efficiency. For practical use, the minimum efficiency must be 70% or more, preferably 80% or more, and the effect of reducing carbon dioxide (CO ₂ ) by thermal power generation has been reported to be sufficiently large.

On the other hand, when other vehicles pass on the road with the feed coil, self-induced electromotive force is induced at the bottom of the car to prevent power loss or electromagnetic interference (EMI) problem. The existing PATH team reports that the power loss is more than 200W. To reduce this, it is necessary to significantly reduce the width of the feed coil and increase the power frequency appropriately. However, if the width of the feed coil is reduced, there is a problem in that the power transfer characteristics of the gap between the current collector coil and the left and right fluctuations become worse.

1 is a schematic longitudinal cross-sectional view of a conventional non-contact electric vehicle feed road. As shown in FIG. 1, a conventional non-contact electric vehicle power supply road 10 includes a power supply core 11, a power supply line 12, and a common line 13.

At this time, the feed line 12 is wrapped in the fiber-reinforced plastic pipe 13 for the feed line, the common line 14 is also wrapped in the fiber-reinforced plastic pipe 15 for the common line.

Since common fields 14 also generate electromagnetic fields and problems such as electromagnetic interference, common line electromagnetic shielding coils 16 and copper shielding are common around common lines 14 to shield electromagnetic fields generated from common lines 14. The network 17 should be further installed. However, in the case of installing the common line electromagnetic shielding coil 16 and the copper shielding network 17, the construction procedure is increased, which is cumbersome, and the common line electromagnetic shielding coil 16 and the copper shielding network 17 are installed. There is a problem that an additional cost is generated and the installation cost is increased.

In addition, since the common line electromagnetic field shielding coil 16 and the copper shielding net 17 are not highly durable, it is difficult to use aggregate concrete or the like, so that problems such as cracking occur in the center portion of the power supply road 10 may occur. There is a problem.

Therefore, the present invention was created to solve the above problems, by wrapping the common wire with an aluminum protective tube, it is possible to easily shield the electromagnetic field generated in the common line without supplying additional shielding coil and copper shielding network, It is an object of the present invention to provide a non-contact electric vehicle feed road that can prevent the cracks occurring in the lower part of the feed road from the structural aspect of the feed road as it is possible to use aggregate concrete to improve the strength in the road construction.

An object of the present invention as described above is a non-contact electric feed window for a feeder including a feed core, a feed line and a common line, aluminum protective tube surrounding the common line to shield the electromagnetic field generated from the common line; includes It can be achieved by a non-contact electric vehicle feed road characterized in that.

At this time, the diameter of the aluminum protective tube is 30mm to 70mm.

In addition, the thickness of an aluminum protective tube is 2 mm-10 mm.

According to the present invention, the electromagnetic field generated from the common line using only the aluminum protective tube can be significantly reduced compared to the conventional fiber-reinforced plastic tube. Compared with other metals, there is no continuous temperature rise caused by the generation of electromagnetic fields, so there is an effect that can be used stably.

In addition, since only the aluminum protective tube is used, it is not necessary to install additional shielding coils and copper shielding nets as in the case of using a conventional fiber-reinforced plastic tube, so the installation is simple and the installation cost can be significantly reduced.

In addition, by using the aluminum protective tube, it is possible to use the aggregate concrete that can improve the strength during construction of the feed road, and thereby there is an effect that can prevent the crack occurring in the lower feed road in terms of the structural structure of the feed road.

The following drawings, which are attached in this specification, illustrate preferred embodiments of the present invention, and together with the detailed description thereof, serve to further understand the technical spirit of the present invention. It should not be interpreted.
1 is a schematic longitudinal sectional view of a power supply road for a conventional non-contact electric vehicle,
Figure 2 is a schematic longitudinal cross-sectional view of a power supply road for a non-contact electric vehicle according to the present invention,
3 is a schematic view showing a measurement position for the performance comparison experiment of the common line protective tube,
4 is a thermal characteristic evaluation result graph using a metal tube,
5 is a thermal characteristic evaluation graph using the aluminum protective tube according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

<Construction of Feeder Road for Non-Contact Electric Vehicles>

2 is a schematic longitudinal cross-sectional view of a power supply road for a non-contact electric vehicle according to the present invention. As shown in FIG. 2, the non-contact electric vehicle feed road 100 according to the present invention includes a feed core 110, a feed line 120, a common line 140, and an aluminum protective tube 150.

The feed core 110 according to the present invention is composed of a ferrite magnetic material using Mn-Zn material, and the feed line is made of a Litzwire high frequency cable.

Here, the feeder 120 is wrapped in a fiber reinforced plastic (FRP) tube 130 because it is weak to mechanical cyclic load or impact. At this time, the fiber-reinforced plastic tube 130 also serves to electrically insulate.

The feeder line 120 and the feeder core 110 described above are commonly used in the art, and a detailed description thereof will be omitted.

The common line 140 according to the present invention is provided to form a feeder road segment, and generally, one common line 140 or a pair of common lines 140 is used. Is commonly used in the art, the detailed description thereof will be omitted. In this case, since the electromagnetic field is emitted from the common line 140 when the electric power is supplied, the aluminum protective tube 150 surrounding the common line 140 is provided to shield the common field 140. The aluminum protective tube 150 has a diameter of 30 mm to 70 mm, a thickness of 2 mm to 10 mm, and preferably an inner diameter of 51 mm and an outer diameter of 55 mm. As such, by wrapping the common wire 140 with the aluminum protective tube 150, the common wire electromagnetic shielding coil 16 and the copper shielding network 17 for shielding the electromagnetic field generated from the common wire 14 are installed. Since there is no need for a simple construction, it is possible to use aggregate concrete that can improve the strength of the power supply 100 construction. As a result, it is possible to prevent cracks occurring in the lower portion of the feed road 100 in terms of the structure of the feed road 100.

<Experimental Results>

3 is a schematic view showing a measurement position for the performance comparison experiment of the common line protective tube. The materials surrounding the common lines 14 and 140 were tested using a metal tube (Unknown Metal Duct), an existing fiber-reinforced plastic tube 15, and an aluminum protective tube 150 according to the present invention.

First, in the case of wrapping the common line with the existing fiber-reinforced plastic tube 15 and the metal tube, the result of measuring the strength of the electromagnetic field at various locations based on each installation position is shown in Table 1 below.

material Fiber Reinforced Plastic (FRP) Pipe Metal (General Metal) Tube Measuring position (One) (2) (3) (4) (5) (One) (2) (3) (4) (5) electric current
100 A 39 80 56 3 2 0 0 0 0 0 200 A 82 148 132 9 6 2 3 3 0 0

As shown in FIG. 3, the measurement positions of Table 1 are positions set at an arbitrary height of 30 cm from the position at which the common lines 14 and 140 are installed, ((1), (2), and (3). 4) is 1.2m horizontally from the position where the common lines 14 and 140 are installed, and (5) is measured at a height of 45cm from the position (4) to the vertical top. In this case, the unit used for the measured value is mG.

As shown in Table 1, it can be seen that the strength of the electromagnetic field is significantly reduced when the metal tube is used as compared with the conventional fiber-reinforced plastic tube 15.

4 is a graph showing the thermal characteristics evaluation results using a metal tube. As shown in Table 1, it can be seen that when the metal tube is used, the strength of the electromagnetic field generated in the common lines 14 and 140 can be significantly reduced. However, when shielding the common lines 14 and 140 with a metal tube, as shown in FIG. 4, after about 8 minutes due to the continuous temperature rise, the temperature of the metal tube exceeds 100 ° C., and continuous experiments are impossible. It was. As such, when the general metal is actually used for shielding the common lines 14 and 140, problems such as common line breakage may occur due to continuous temperature rise.

In order to compare with a general metal, the strength of the electromagnetic field at the same point as [Table 1] using the existing fiber-reinforced plastic tube 15 and the aluminum protective tube 150 according to the present invention is shown in the following [Table 1 2].

material Fiber Reinforced Plastic (FRP) Pipe Aluminum sheath Measuring position (One) (2) (3) (4) (5) (One) (2) (3) (4) (5) Field strength
(Current = 200 A) 68 144 77 15 6 4 5 6 3 2

The position used in [Table 2] was measured at each position shown in FIG. 3 in the same manner as in [Table 1], and the unit of the measured value is mG. As shown in Table 2, the aluminum protective tube 150 has a weak shielding of the electromagnetic field compared to the metal tube, but it can be seen that a significant reduction effect compared to the conventional fiber-reinforced plastic tube (15).

5 is a thermal characteristic evaluation graph using the aluminum protective tube according to the present invention. When the aluminum protective tube 150 according to the present invention is to surround the common line 140, the results of the temperature increase due to the magnetic field generated in the common line 140, as shown in the graph shown in FIG. The temperature distribution of 29 degreeC is shown. As shown in FIG. 5 and Table 2, when the aluminum protective tube 150 according to the present invention is used for shielding the common line 140, the shielding effect of the magnetic field is also large, and a temperature rise effect such as a metal tube does not occur. It works. At this time, the vertical axis of Figs. 4 and 5 represents the temperature (° C), the horizontal axis represents the time (minutes).

In addition, comparing the costs incurred when using the electromagnetic shielding device using the conventional fiber-reinforced plastic tube 15 and the aluminum protective tube 150 according to the present invention as shown in Table 3 below.

As shown in Table 3, when the aluminum protective tube 150 according to the present invention is used, it is not necessary to install the common line electromagnetic shielding coil 16 and the copper shielding net 17, and the relative cost of the unit length (1 m) It is also inexpensive compared with the conventional fiber reinforced plastic pipe (15). Compared with the cost described in Table 3, only 29.524% of the cost is required compared to the common line magnetic field shielding device using the conventional fiber-reinforced plastic pipe 15. That is, compared to the common line magnetic field shielding device using the conventional fiber-reinforced plastic pipe 15, the cost can be reduced by about 70%.

As described above, those skilled in the art will understand that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

10: conventional non-contact electric vehicle feed road
11: feeding core
12: feeder
13: Fiber reinforced plastic pipe for feeder
14: common line
15: fiber reinforced plastic pipe for common line
16: common field electromagnetic shielding coil
17: copper shielding net
100: non-contact electric vehicle feed road according to the present invention
110: feeding core
120: feeder
130: fiber reinforced plastic tube
140: common line
150: aluminum protective tube

Claims (3)

In a non-contact electric feed window for a feeder including a feed core, a feed line and a common line,
Electricity supply road for a non-contact electric vehicle comprising a; aluminum shielding tube surrounding the common line to shield the electromagnetic field generated in the common line. The method of claim 1,
The diameter of the aluminum protective tube is a non-contact electric vehicle feed road, characterized in that 30mm to 70mm. The method of claim 1,
The thickness of the aluminum protective tube is a non-contact electric vehicle feed road, characterized in that 2mm to 10mm.

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