DE29708872U1 - Miniature train (toy train) with linear motor drive (magnetic levitation train) - Google Patents

Description

Reference number: 297 08 872.6

Protection claims and description

of the utility model: 297 08 872.6

Miniature railway (toy railway) with linear motor drive

(Mag netsch webebah &eegr; )

Table of contents:

1. Right to protection

2. Description

2. 1 State of the art:

2.1.1 Germany

2.1.2 Japan

2.2 Application as a miniature railway (toy railway):

2.2.1 Arrangement of the magnets for the simulation of the German magnetic levitation train (Transrapid) as a miniature railway

2.2.2 Arrangement of the magnets for the simulation of the Japanese maglev train as a miniature railway

Explanations of the figures:

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Reference number: 297 08 872.6

2. Description

Miniature railway (toy railway) with linear motor drive (magnetic levitation).

2.1 State of the art:

Linear motor:

A linear electric motor is an asymmetrical electric motor that is cut apart and stretched.

The magnets of the stator (1), which are mounted on the support or track body, are excited with "three-phase current" (3 phases of alternating current, each offset by 120 degrees).

Every third magnet is excited with the same current phase, whereby the excitation occurs alternately (winding left and right). Since the stator magnets (1) are excited with 3 offset phases of alternating current, an oscillating magnetic field is created on the stator magnets (1), which moves. The direction can be changed by swapping the phases, the speed by changing the frequency of the alternating current.

The rotor magnet (2), part of the vehicle, moves with the oscillating field. In the simplest case, this rotor magnet (2) is a permanent magnet, but it can also be an electromagnet, which under certain circumstances is also excited by the moving magnetic field of the stator (1).

See also Figure 2: The moving magnetic field on the track body or support

2.1.1 Germany

The "Transrapid" magnetic levitation train is currently being tested in Emsland. The plan is for this train to be used between Hamburg and Berlin. This train is guided on supports, on the left and right underside of which there are electromagnets (stators (1)) that are excited by three-phase current (three phases of alternating current, each offset by 120 degrees). The counter magnets (2) of the vehicle grip under the magnets of the support and lift the vehicle.

See Figure 3: Schematic cross-section of the support (track body) of the maglev train tested in Emsland.

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Reference number: 297 08 872.6

2.1.2 Japan

In the Japanese development, the track body is housed in a channel, at the bottom of which the stators are located.

2.2 Application as a miniature railway (toy railway):

Neither system is suitable for miniature railways (toy trains), because the magnetic fields have to be finely tuned.

In order to largely avoid the need for fine-tuning of the magnets, it must be prevented that the magnets can move towards each other in the direction of the north-south poles. The following arrangement must be made for the replica of the German magnetic suspension railway.

2.2.1 Arrangement of the magnets for the simulation of the German magnetic levitation train (Transrapid) as a miniature railway

See Figure 4

2.2.2 Arrangement of the magnets for the simulation of the Japanese maglev train as a miniature railway

See Figure 5

The stator magnets (2) shown in the sketches can also be combined in pairs by appropriate shaping. Likewise, in the simulation of the German magnetic levitation train, two opposing rotor magnets (2) can be combined into one.

By exciting the stator magnets (1) (windings like in an asymmetrical electric motor), the rotor magnet (2), which is part of the vehicle, is lifted, and with it the vehicle. The speed of the vehicle is regulated by varying the frequency of the excitation current.

Since the stator magnets (1) and rotor magnets (2) are not arranged one above the other, but side by side, the vehicle stabilizes itself largely independently. (See Figure 6)

Reference number: 297 08 872.6

Explanations of the figures:

Pos. 1 : Stator magnets (excited with three-phase current)
Pos. 2: Rotor magnets (part of the vehicle) Pos. 3: Support (track body)
Pos. 4: Vehicle

Figure 1: Cross section of the magnetic levitation train showing the arrangement of the magnets

Figure 2: The moving magnetic field on the track body or beam

The red line represents a stationary state of the magnetic field. Depending on the polarity of the 3 phases of the alternating current, the field moves to the left or right, the speed is determined by the frequency of the alternating current and the distance between the magnets.

Figure 3: Schematic cross-section of the support (track body) of the maglev train tested in Emsland.

Figure 4: Arrangement of the magnets for the simulation of the German Magnetlevbahn (Transrapid) as a miniature railway.

Figure 5: Arrangement of the magnets for the simulation of the Japanese maglev train as a miniature railway

Figure 6: Stabilization of the maglev train

A: Stator magnets not excited, vehicle sits on the support (track body) B: Stator magnets are excited, the vehicle hovers and is stabilized by its weight.

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Claims (1)

Reference number: 297 08 872.6 1. Claim for protection Miniature railway (toy railway) with linear motor drive (magnetic levitation railway), characterized in that the drive is via a linear motor. Stator magnets and rotor magnets are located next to each other. Two opposing stator or rotor magnets can be combined to form one magnet. -2-