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Long-stator linear motor structure for maglev train and maglev train

A technology for linear motors and maglev trains, applied in the shape/style/structure of magnetic circuits, the shape/style/structure of winding conductors, motor vehicles, etc., can solve the impact of thrust and suspension force fluctuations, does not involve double-fed motor design, There are no effective technical measures to achieve the effects of improving reliability, improving mechanical and thermodynamic properties, improving stiffness and heat dissipation performance

Pending Publication Date: 2022-05-06
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above introductions and known literature are mainly for rotating electrical machines, and do not deal with doubly-fed machine design
Compared with the known technology, the long stator doubly-fed linear motor for high-speed magnetic levitation application has two main technical difficulties: (1) The long stator of the magnetic levitation application requires a minimalist stator structure, and the electromagnetic design is far more than the commonly discussed induction motor or The excitation of the permanent magnet synchronous motor should be harsh; (2) The stator and the mover of the doubly-fed linear motor have slotted iron cores, and the resulting double salient effect directly affects the thrust and suspension force fluctuations
[0008] In the known technology, there is no effective technical measure for the problems referred to above

Method used

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  • Long-stator linear motor structure for maglev train and maglev train
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  • Long-stator linear motor structure for maglev train and maglev train

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Such as figure 1 As shown, this embodiment provides a long-stator linear motor structure for a maglev train, including two linear motors arranged opposite to each other on the left and right sides. The figure schematically shows a stator 1 with twelve slots and four poles and a mover 2 with five slots and three poles.

[0043] Such as figure 2 As shown, a pair of poles of the stator 1 has a six-slot, single-layer, single-turn, integer-slot, and wave winding structure. The stator 1 includes a stator core, and the stator core is provided with a round-bottomed open slot 101 , and a single-layer wave winding 102 is embedded in the open slot 101 . The pole moment is 258mm, and the tooth width is 43mm.

[0044] Such as image 3 As shown, each unit motor of the mover 2 has a 10-slot, 6-pole structure, double-layer, multi-turn, fractional slot, and concentrated winding structure. The winding adopts five-phase star connection, the number of turns is 270 turns, the pole mom...

Embodiment 2

[0052] Refer to the pole slot design of Example 1.

[0053] The mover 2 includes a mover iron core, and the mover iron core is provided with a chute 202 , and a double-layer concentrated winding 201 is arranged in the chute 202 . The chute at the relative position of the mover iron cores on the left and right sides can be in a "V" shape, such as Figure 5 As shown, it can also be inverted "V" shape, such as Figure 6 shown. Under normal operating conditions, the axial forces on the left and right sides are equal in magnitude and opposite in direction; when the mover is axially offset, the originally balanced axial electromagnetic force component is no longer balanced and produces a force proportional to the axial offset. The proportional normalizing force component keeps the mover running along the design axis.

[0054] Figure 5 Axial offset for alignment of stator and mover outside. Outer alignment is adopted, and the chute at the relative position of the mover core on ...

Embodiment 3

[0065] This embodiment provides a maglev train, including the long-stator linear motor structure described in Embodiment 1 or Embodiment 2, wherein the stator is laid along a track, and the mover is fixed to the train.

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Abstract

The invention relates to a long stator linear motor structure for a maglev train and the maglev train, the long stator linear motor structure comprises two linear motors which are oppositely arranged on the left side and the right side, each linear motor comprises a stator and a mover, the stator comprises a stator iron core and a stator winding and is laid along a track, and the mover comprises a rotor and a rotor iron core; the stator core is configured to have six slots below each pair of magnetic poles, and the stator winding is configured to have a single-layer, single-turn, integer-slot and three-phase wave winding; the rotor is fixedly connected with a train and is composed of a plurality of rotor units with the same magnetic circuit, each rotor unit comprises a rotor iron core and a rotor winding, the rotor iron core is constructed into 10 grooves under every three pairs of magnetic poles, and the rotor winding is constructed into a double-layer, multi-turn, fractional-groove and five-phase concentrated winding. Compared with an existing linear motor structure, the linear motor structure is suitable for a double-fed linear motor, and effective suppression of thrust and suspension force fluctuation is achieved on the premise that the rotor current phase and frequency control freedom degree of the double-fed motor is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of linear motors, and relates to a long-stator linear motor structure for a maglev train and the maglev train. Background technique [0002] The maglev train is a very potential rail transportation tool. Different from the traditional wheel-rail system, there is no contact between the carriage and the track of the maglev train. The electromagnetic force generated by the linear motor is mainly used to realize the non-contact suspension and Drive, there is no friction between the wheel and the rail, and the train speed can reach more than 500km / h. [0003] At present, the linear motor type of high-speed maglev trains is mainly the technical route of long stator electric excitation linear synchronous motor. Electrically excited synchronous motors have difficulties and deficiencies such as power supply of movers and position coupling of rails. For this reason, the invention patent (application number: 20211063...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K41/02H02K3/04H02K1/14H02K1/24B61B13/08B60L13/04
CPCH02K41/02H02K3/04H02K1/14H02K1/24B61B13/08B60L13/04H02K2213/03
Inventor 钟再敏王业勤杨明磊肖庆豪
Owner TONGJI UNIV
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