CN102350956B - Magnetic suspension mechanism integrating suspension, guiding and hauling functions - Google Patents

Abstract

The invention discloses a magnetic levitation mechanism with integrated levitation guide traction function. The stator of the long stator linear synchronous motor installed on the ground track beam and the mover of the motor installed on the maglev vehicle as a levitation electromagnet realize the constant conduction electromagnetic Suction suspension. The iron core of the stator of the long-stator linear synchronous motor and the iron core of the motor used as a suspension electromagnet are symmetrically provided with a plurality of non-ferromagnetic longitudinal slots of equal width. The invention provides a constant conduction magnetic levitation mechanism integrated with levitation guide and traction functions. When the mechanism moves laterally, the mechanism automatically generates an electromagnetic reset force, forcing the stator of the long-stator synchronous motor to align with the center line of the iron core of the mover, thereby ensuring that the mechanism in the correct position. It can be used in conventional high-speed and medium-low speed maglev trains, and has the advantages of greatly simplifying the structure of maglev vehicles, reducing vehicle weight and high system efficiency.

Description

Magnetic Levitation Mechanism Integrated with Suspension Guided Traction Function

technical field

The invention relates to maglev locomotive equipment, in particular to the manufacturing field of maglev mechanism equipment integrated with levitation guide traction function of a normally conducting maglev train.

Background technique

Whether it is a high-speed or a medium-low speed system, the conventional maglev train involves suspension, guidance and linear traction. In the existing high-speed constant conduction maglev system, both levitation and traction are realized by long-stator synchronous motors: that is, the stator of the long-stator linear synchronous motor installed on the ground track beam and the mover of the motor installed on the maglev vehicle ( That is, the levitation electromagnet) realizes levitation; when a symmetrical three-phase current is passed through the stator winding of the motor, the stator winding generates a traveling wave magnetic field, which interacts with the magnetic field of the motor mover to generate longitudinal traction. In order to enable the maglev vehicle to be located in the center of the track and to pass through the curve, the existing high-speed maglev vehicle additionally adds an electromagnetic guidance system, which is actually another pair (or multiple pairs) of electromagnets. By controlling the electromagnetic force, the train is always in the middle of the track. The addition of the electromagnetic guidance system increases the complexity of the maglev vehicle, and also increases the weight of the train, which increases difficulties in the design of the train and the installation of equipment, and reduces the reliability of the train.

The suspension electromagnet of the existing medium-low speed maglev train adopts a U-shaped structure. In this way, the guiding problem of the train is naturally solved, because once the vehicle moves laterally, the suspension electromagnet installed on the vehicle will displace with the U-shaped iron yoke installed on the ground track beam, and the air gap magnetic field will generate a restoring force , so that the maglev vehicle is automatically centered. So it doesn't need an extra guide link. However, the traction of the train adopts a short stator linear asynchronous traction motor, which has nothing to do with the electromagnetic suspension system. Due to the discontinuity of the magnetic circuit and the circuit of the linear induction motor, when the motor is running, the so-called "end effect" will be generated in the air gap magnetic field of the motor. End effects greatly reduce the efficiency of traction motors. At the same time, due to the large working air gap of the linear induction motor, the loss of the motor is very large. Since the motor and inverter are installed on the vehicle, the vehicle is heavy, the suspension consumes a lot of power, and the system efficiency is low.

Contents of the invention

In view of the deficiencies of the existing solutions stated above, the object of the present invention is to provide a constant conduction magnetic levitation mechanism integrated with levitation guidance and traction functions, so that it can overcome the above shortcomings of the prior art.

The object of the present invention proposes and realizes based on following analysis and scheme:

The maglev mechanism integrated with the levitation-guided traction function realizes the constant-conduction electromagnetic attraction levitation by the stator of the long-stator linear synchronous motor installed on the ground track beam and the mover of the motor installed on the maglev vehicle as a levitation electromagnet. The iron core of the stator of the long-stator linear synchronous motor and the iron core of the mover of the motor used as a suspension electromagnet are symmetrically provided with a plurality of equal-width non-ferromagnetic longitudinal slots.

The invention provides a constant conduction magnetic levitation mechanism integrated with levitation guide and traction functions. When the mechanism moves laterally, the mechanism automatically generates an electromagnetic reset force, forcing the stator of the long-stator synchronous motor to align with the center line of the iron core of the mover, thereby ensuring that the mechanism in the correct position. It can be used in conventional high-speed and medium-low speed maglev trains, and has the advantages of greatly simplifying the structure of maglev vehicles, reducing vehicle weight and high system efficiency.

The accompanying drawings are as follows:

Fig. 1 is a schematic diagram of the positions of the stator and the mover of the long-stator linear synchronous motor in the present invention.

Fig. 2 is a structural schematic diagram of the stator and mover of the long-stator linear synchronous motor during suspension and traction.

Figure 3 is a schematic diagram of the magnetic field between the stator and the mover of the long-stator linear synchronous motor when the mechanism is laterally displaced.

Detailed ways

The structure of the present invention will be described in further detail below in conjunction with the accompanying drawings.

Fig. 1 expresses the longitudinal sectional view along the length direction of the track, the maglev mechanism with integrated levitation guide traction function consists of the stator (100) of the long stator linear synchronous motor installed on the ground track beam and the stator (100) installed on the maglev vehicle as a levitation electromagnet The mover (300) of the motor realizes the levitation of the constant conduction electromagnetic attraction. Without loss of generality, Fig. 2 and Fig. 3 can be regarded as the K-K section of Fig. 1, the iron core (120) of the stator of the long-stator linear synchronous motor and the iron core (320) of the motor used as a suspension electromagnet are symmetrically opposite There are multiple non-ferromagnetic longitudinal grooves of equal width (101, 102, 103 and 301, 302, 303 in the figure). The motor mover, the air gap (200) and the motor stator form a magnetic circuit. By controlling the current in the excitation winding (310) of the levitation electromagnet (ie, the motor mover), the magnitude of the electromagnetic attraction force generated by the levitation electromagnet can be controlled, thereby realizing levitation by electromagnetic force. Symmetrical three-phase windings (110) are installed on the stator of the motor, and the pole pitch of the motor stator is the same as that of the motor mover (i.e. the suspension electromagnet). In the figure (310) is an electromagnet excitation winding of the motor mover. When the symmetrical three-phase current passes through the stator winding of the motor, the stator winding generates a traveling wave magnetic field, which interacts with the magnetic field of the suspension electromagnet to generate longitudinal traction force (the direction of the magnetic field action is shown by the arrow in Figure 2), so that the motor mover moves along the longitudinal direction. run. Through the control of the long stator linear synchronous motor, the complete decoupling of the traction force and the levitation force can be achieved, in other words, the two forces have no influence on each other. In the mechanism of the present invention, the suspension and traction functions are all realized by the long stator synchronous motor, which is similar to the conventional high-speed maglev. When the mechanism moves laterally, the center line of the stator of the long-stator synchronous motor and the iron core (slot center) of the mover also produces a lateral displacement, and as a result, a lateral magnetic flux is automatically generated, thereby automatically generating an electromagnetic reset (guiding) force, forcing the long stator to be synchronous The stator of the motor is line aligned with the core center (slot center) of the mover, thus ensuring that the mechanism is in the correct position. The mechanism adopts a special structure in which multiple non-ferromagnetic longitudinal slots of equal width are opened on the stator core of the long stator motor and the core of the mover electromagnet (that is, the suspension electromagnet), so as to realize the passive electromagnetic guiding function of the mechanism without adding additional Independent electromagnetic guidance mechanism. Under normal circumstances, the stator of the long-stator synchronous motor coincides with the core centerline (or slot centerline) of the mover, and the magnetic field between the stator and the mover has only the longitudinal By component; when the mechanism moves laterally, the stator of the long-stator synchronous motor The center line of the iron core (or slot) of the mover also produces lateral displacement, and the magnetic field distribution between the stator and the mover is shown in Figure 3. At this time, the magnetic field between the stator and the mover will have two components: transverse Bx and longitudinal By. The direction of the electromagnetic force generated by the transverse component Bx of the magnetic flux is in the direction of reducing the transverse displacement, that is, it is the reset (guiding) force, under the action of which, the mechanism can automatically force the stator of the long-stator synchronous motor to align with the The core center (slot center) line of the mover is aligned to ensure that the mechanism is in the correct position. Under the condition that the By component of the magnetic field between the stator and the mover remains unchanged (that is, the levitation force remains unchanged), the greater the lateral displacement, the greater the guiding force, so the mechanism can achieve reliable guiding.

In the present invention, the guiding force is generated by the transverse component Bx of the magnetic field between the stator and the mover, all by changing the shape of the magnetic circuit between the stator and the mover or adding a permanent magnet so that when the lateral displacement increases, the transverse component of the magnetic field automatically increases to generate The method of greater guiding force, its principle is identical with the present invention, all in the inclusion of the present invention, but not as simple and reliable as the present invention. in addition. The equal-width non-ferromagnetic longitudinal grooves of the present invention obviously include the equal-width non-ferromagnetic longitudinal groove spaces that are filled with air. In practice, the equal-width non-ferromagnetic longitudinal grooves are filled with non-air other conventional non-ferromagnetic Materials are more efficient and practical.

Compared with the current medium and low-speed maglev trains, the present invention integrates the suspension guiding and traction functions, and does not need special suspension electromagnets. Both the motor stator and the inverter are installed on the ground, the structure of the maglev vehicle is greatly simplified, the weight of the vehicle is reduced, and the efficiency is improved. Compared with the current high-speed maglev train, it has no additional electromagnetic guidance system, the equipment of the vehicle is reduced, the dead weight is light, and the system is simplified. Therefore, this scheme has the advantages of the current conventional high-speed and medium-low speed maglev trains.

Claims (2)

1. the magnetic floating mechanism of integrated suspension guiding traction function, realize that by the stator that is installed in the long stator synchronous linear motor on the ground rail beam and the mover that is installed on the floating car of magnetic as the motor of levitating electromagnet normal conductive magnetism suction suspends, it is characterized in that, the iron core of the stator of described long stator synchronous linear motor be provided with in opposite directions many wide non-ferromagnetic longitudinal slots as symmetry on the iron core of the mover of the motor of levitating electromagnet.

2. the magnetic floating mechanism of described integrated suspension guiding traction function according to claim 1 is characterized in that, is filled with nonferromagnetic material in the described wide non-ferromagnetic longitudinal slot.

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