JPH0669245B2 - Combined levitation and propulsion system for magnetic levitation - Google Patents

Description

TECHNICAL FIELD The present invention relates to an induction repulsion type magnetic levitation levitation and propulsion method, and in particular, reduces running resistance and simplifies vehicle and track structures. And arrangement of coils for the purpose.

[Prior Art and its Problems] As shown in FIG. 1, many levitation ground coils for generating a levitation force of the magnetic repulsion method of induction repulsion are conventionally arranged on the bottom surface of a U-shaped track. However, it was necessary to apply a large induced current to the levitation ground coil, and there was a limit to reducing the running resistance. In addition, in this arrangement, the coil for both propulsion and guidance is connected to the power source for propulsion,
Since a high voltage is applied, the null flux cable that connects the two coils for both left and right propulsion and guidance together must also be able to withstand the high voltage, and therefore the structure becomes complicated and expensive. It was In order to reduce the voltage of the null flux cable, it is necessary to separate the propulsion and guide coils, which increases the number of coils. In order to reduce running resistance, a method has already been proposed in which a null flux connection ground coil that connects two levitation coils in opposite directions, as shown in Fig. 2, is placed on the surface of the side-wall propulsion guide combination coil. Has been done. This coil placement method helps to reduce running resistance and simplifies the structure of the vehicle and track, but the problem is that the null flux cable that connects the left and right propulsion and guide combination coils must also have high withstand voltage. Was not done.

The present invention eliminates the above-mentioned problems, arranges a ground coil for both levitation and propulsion, and connects a null flux cable of a guide coil to reduce running resistance and a null flux cable of a guide coil. The purpose is to reduce the voltage applied to.

(Means for Solving the Problem) In order to solve the above-mentioned problems, the magnetic levitation railway combined use system for levitation and propulsion of a magnetic levitation railway has a superconducting coil vertically arranged on the side surface of its bogie in an induction repulsion type magnetic levitation railway. Then U
The levitation propulsion / combined coils are installed in the upper and lower two stages on both side walls of the letter-shaped track, and the levitation propulsion / combined coils in the upper and lower two stages are connected in opposite directions to each other to form a closed circuit. It is designed to be connected to and to fulfill the functions of surfacing and propulsion at the same time.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. First
The figure shows an example of a coil arrangement of a conventional magnetic levitation railway. Although the levitation force is generated from the levitation coil 3, it is difficult to increase the lift-drag ratio with such an arrangement. In addition, since an unstable spring in the left-right direction is generated from the levitation coil 3, it is necessary to generate a stable spring exceeding that with a coil for both propulsion and guidance. The left and right propulsion and guidance coils are connected by a null flux cable 6 and connected to a power supply for propulsion. FIG. 2 shows a levitation coil arrangement for null flux connection that has already been proposed, and shows a method of attaching two levitation coils on the upper and lower sides in opposite directions and attaching them to the side surface of the track. The combination coil for propulsion and guidance is the same as in the case of FIG. FIG. 3 shows the arrangement and connection of the coils in the combined levitation and propulsion system of the present invention for one side wall. The levitation and propulsion coil 9 is connected to a power supply 10 for propulsion. The surfacing function is the second
As in the case of the figure, by arranging the coils in this way, when the center of the superconducting coil is at the center height of the two levitation / propulsion / combined coils 9, the levitation / propulsion / combined coil 9 has zero interlinkage magnetic flux. , The current becomes 0 and the electromagnetic resistance is 0.
Becomes For example, when the wheels travel at low speed, the electromagnetic travel resistance can be made zero by setting the wheel height so that the centers of the superconducting coil and the levitation / propulsion / coil 9 coincide with each other. During the levitation traveling, the center of the superconducting coil is slightly below the center of the two levitation propulsion / combining coils 9 to generate a levitation force in equilibrium. However, since it is a null flux connection, the electromagnetic traveling resistance can be reduced. .
At this time, the induced current for levitation flowing in the levitation / propulsion coil forms a closed loop as shown in FIG. On the other hand, the current for propulsion is supplied from the power source, but as shown in FIG. 5, the upper and lower coils flow in the same direction, and a propulsive force is generated on the vertical side. That is, one type of coil can be used for both levitation and propulsion. In such a configuration, the guiding coil 8 does not need to be connected to a power source, and the null flux cable 7 may be for low voltage.

〔The invention's effect〕

According to the combined levitation and propulsion system of the present invention, the running resistance of the vehicle can be reduced, and the voltage of the null flux cable of the guide coil can be lowered, so that the power supply facility can be made small and for construction. The cost of can be reduced.

[Brief description of drawings]

FIG. 1 is a coil arrangement in a cross section of a conventional induction repulsion type magnetic levitation railway, and FIG. 2 is a coil arrangement in a cross section of a ground coil of a null flux connection which has already been proposed. FIG. 3 shows the arrangement and connection of coils according to the present invention, FIG. 4 shows the flow of the induced current for levitation in the levitation propulsion / combined coil, and FIG. 5 shows the propulsion in the levitation propulsion / combined coil. FIG. 6 is a diagram showing how to flow a current for the purpose of FIG. 1 …… Superconducting coil 2 …… Propulsion guidance combined coil 3 …… Levitating coil 4 …… Track concrete 5 …… Bogie 6 …… Null flux connection line for levitating coil 7 …… Null flux cable for guidance 8… … Guide coil 9 …… Levitation propulsion combined coil 10 …… Power supply for propulsion

Claims (1)

[Claims] 1. In an induction-repulsion type magnetic levitation railway, a superconducting coil is vertically arranged on the side surface of a bogie, and levitation / propulsion coils are installed in upper and lower two steps on both side walls of a U-shaped track. The levitation and propulsion coils are connected in opposite directions to each other to form a closed circuit, and the levitation and propulsion coils are connected to the propulsion power source to perform the levitation and propulsion functions at the same time. Dual-purpose system.