JPS5886808A - Supporter for attracting force type magnetic levitating car - Google Patents

Abstract

PURPOSE:To obtain the light small-sized supporter, which has excellent following property to a magnetic rail, for the attracting force type magnetic levitating car by reducing the sectional area of the yoke of an electromagnet for support. CONSTITUTION:The sectional areas of magnetic poles at both ends of the magnetic pole rows of the iron cores 5 of the salient-pole type electromagnets 5 for support, which are mounted at the bilaterally symmetrical positions of the truck of the attracting force type magnetic levitating car at every one pair and N poles and S poles thereof are alternately arranged in the course of the car, are made approximately halves of the intermediate sectional areas of the magnetic pole rows. The magnetic rails 7 are installed along tracks while being opposed to the electromagnets 5 for support. According to such constitution, the electromagnets for support are lightened, and following property to the magnetic rails is improved.

Description

[Detailed Description of the Invention] An attraction rectangular magnetic levitation vehicle is a magnet made of a ferromagnetic material such as iron installed on the track, and the attraction force that acts between the le and the electromagnet until it is attached to the chassis! - All support or lateral guidance of the vehicle is carried out and the vehicle is propelled by a linear induction/motor. In order to avoid contact between the track and the electromagnet during running, the support device must have good ability to follow track irregularities. For this reason, it is desirable that the electromagnet has a small M@ quantity, a small self-inductance, and a small amount of power consumed for excitation of the electromagnet. Furthermore, as the vehicle travels, eddy currents flow through the magnetic rails 1 arranged along the track facing the electromagnets, causing losses and acting as drag, so it is necessary to reduce the eddy currents.

The present invention relates to an electromagnet for supporting an attraction square magnetic levitation vehicle. The conventional suction rectangular magnetic levitation vehicle support device is w
As shown in Figure L1, this uses the attractive force that acts between a long electromagnet with a U-shaped cross section attached to a bogie and a flat magnetic rail attached to a track.

Alternatively, as shown in Fig. 2, a long electromagnet with a U-shaped cross section attached to the cart and a magnetic rail with a U-shaped cross section attached to the cart utilize an electromagnet that works between them. There is a method of having salient pole electromagnets facing the rail.

- The method using a U-shaped electromagnet has a large leakage magnetic flux, resulting in a large inductance, and the long and thin Mayu iron core has a low winding utilization rate, so the excitation power is large.

There are nine drawbacks, such as the heavy electromagnet.

The salient pole electromagnet system requires a magnetic rail stacked type, but since the opposing surface between the magnetic rail and the electromagnet is wide, the utilization rate of the iron core is high and the leakage flux is small, so the electromagnetic yoke is And the cross section of the magnetic rail can be made smaller. Furthermore, since the convex pole type electromagnet core can have a substantially square or circular cross section, the utilization rate of the winding wire is increased. Therefore, the salient pole electromagnet system is lighter than the U-shaped electromagnet system, requires less excitation power, and has smaller inductance, so it has better followability to the magnetic rail.

An object of the present invention is to further improve the salient pole electromagnet t to obtain a support device for an attraction rectangular magnetically levitated vehicle that is small, lightweight, consumes little power, and has good followability to a magnetic rail.

The present invention is provided in pairs at symmetrical positions on the bogie of an attraction rectangular magnetically levitated vehicle.
Further, the cross-sectional area of the salient pole type supporting electromagnets arranged mutually is V2, which is achieved by combining the supporting electromagnets with a magnetic rail installed along the track facing the supporting electromagnets.

The present invention will be described in detail below based on the drawings.

FIG. 40 shows a support device according to an embodiment of the present invention installed;
In the layout diagram, 5 is a supporting electromagnet, and 7 is a magnetic rail. Each truck is provided with 14 supporting electromagnets 5F. 1 is the car body, 2Fi secondary spring% 3 is the trolley% 4Fi linear induction motor armature, 6 is the guide electromagnet%
8 is a magnetic rail for vehicle propulsion and guidance. 9 is a track.

FIG. 5 shows the principle of a conventional support device, in which 5 is a supporting electromagnet, 5a is a supporting electromagnet core, which is in the form of a salient pole and is attached to a bogie, facing the magnetic rail 7. The excitation winding of a 5bFi electromagnet is arranged in the traveling direction, and the electromagnet has an N pole with the same cross section along the trajectory,
The south poles are also energized so that they are aligned with each other. Excitation winding 41
If 5b is made into a square or nearly circular shape, the weight of the 5th winding can be reduced because less winding material is needed, and the power used for excitation can be reduced.

FIG. 6 is a diagram showing the magnetic flux in FIG. 5 isometrically.

FIG. 7 is a principle diagram of a support device according to an embodiment of the present invention. In Fig. 7, 5 is a supporting electromagnet, 5a is a supporting electromagnet iron core, and 5b is a supporting electromagnet excitation winding. It is approximately 1/2 of the polar cross-sectional area.

In Figures 6 and 7, the air gap length between the supporting electric/magnet and the magnetic rail is id %, and the magnetomotive force per pole is 1 kNI, the magnetic permeability of air is μ, and the air gap length is large, so the magnetic permeability of iron is assumed to be infinite. Considering that, the magnetic flux density B in the air gap is μolINI B = −−−−−−−−− Approximately, the magnetic flux density in the air gap on the magnetic pole face is assumed to be B, and the magnetic flux density in the other 9 gaps is t-0, and Total magnetic pole area of electromagnet 2
s, the total attractive force F acting on the electromagnet is 5- In Figures 6 and 7, the number of magnetic poles tP of the supporting electromagnet
If the total magnetic pole area S of the supporting electromagnet is the same, then the magnetic flux Φl at the l pole in FIG. 6 is S Φ, = □ The magnetic flux tΦ passing through the poles at both ends in FIG. Then, the middle pole other than both ends has 2Φ! of magnetic flux passes through it.

The magnetic flux passing through the magnetic rail and the supporting electromagnet yoke is 8. Φ, I'm here. Assuming that the density of magnetic flux passing through the iron core is constant, the required cross-sectional area of the iron core is proportional to the amount of magnetic flux passing through it. Fig. 6 and the magnetic rail of the seventh factor (t7t is the cross-sectional area of the yoke of the supporting electromagnet t-8B, SR, then both m- and m-'f-8R,Φ*2(p -1) 6- Figure 8 shows the relationship between the number of poles p and -p-.
It's summer. As shown in Fig. 8, when the number of poles increases, the above explanation changes the distance between the supporting electromagnet and the magnetic rail, the thickness and length of the magnetic pole of the supporting electromagnet, and the magnetomotive force of the supporting electromagnet as shown in Fig. 6. Since it is the same as in Fig. 7, the coil volume is the same, so the coil weight and excitation loss are the same. But 11!7
In the case shown in FIG. 6, the joint surface of the yoke of the supporting electromagnet is smaller than that shown in FIG. 6, and the supporting electromagnet is lighter and its followability to the rail is improved. (9) Since the magnetic rail according to the present invention has a smaller cross-sectional area than the magnetic rail of FIG. 6, the overall material of the magnetic rail is reduced.

According to this embodiment, a support device for an attractive rectangular magnetically levitated vehicle with good followability and a high cost can be obtained by reducing the materials and weight of the supporting electromagnets and magnetic rails.

[Brief explanation of drawings]

1 and 2 are cross-sectional views of a U-shaped supporting electromagnet and magnetic rail according to a conventional example, FIG. 3 is a conventional cross-sectional view and side view, and FIG. 4 is a layout diagram of a supporting device according to an embodiment of the present invention. , FIG. 5 is a principle diagram of a conventional support device, and FIG. 6 is a conceptual diagram of the principle of FIG. 5. FIG. 7 is a principle diagram of a support device according to an embodiment of the present invention. FIG. 8 is a diagram showing the relationship between the number of poles of the supporting electromagnet and SR, /8B. 5: Supporting electromagnet, 5a: Supporting electromagnet iron core. 5b: Supporting electromagnet excitation winding, 7: Magnetic rail, thirdly'';!'4Fig.1'5
20＜fu T8 start

Claims (1)

[Scope of Claims] 1. 1) The track lantern is installed so that the vehicle is magnetically levitated or guided in the lateral direction by the magnetic attraction force that acts behind the scenes between the magnetic rail and the electromagnet attached to the bogie of the vehicle. , a pair of salient pole support electromagnets are provided at symmetrical positions on the bogie, and 4CN poles and S poles are arranged alternately in the vehicle traveling direction. An attraction rectangular magnetic levitation vehicle support device characterized by comprising a supporting electromagnet with approximately 1/2 of the cross-sectional area of a magnetic pole, and a magnetic rail installed along a track facing the supporting electromagnet. .