A coil type permanent magnet electric levitation device for maglev train

Abstract

The invention discloses a coil-type permanent-magnet electro-dynamic suspension device for a magnetic-levitation train; the device has the features that the self-stabilizing suspension of the train is realized in the absence of a control system, the suspension rigidity is higher, and the resistance and energy consumption are both lower. The device comprises a train body, a track and a linear motor, wherein the linear motor is used for driving the train body to move along the track. Each of two sides of the track is fixedly provided with a set of coils; each set of coils is composed of a plurality of zero-flux coils arranged along a track extension direction at intervals. Bilateral permanent-magnet arrays, corresponding to the coils, are transversely arranged on the train body at intervals; the bilateral permanent-magnet arrays comprise upper linear Halbach arrays positioned above the zero-flux coils and lower linear Halbach arrays positioned below the zero-flux coils; an upper air gap is formed between the zero-flux coils and the bottom surfaces of the upper linear Halbach arrays; a lower air gap is formed between the zero-flux coils and the top surfaces of the lower linear Halbach arrays.

Description

technical field [0001] The invention relates to the field of electromagnetic levitation, in particular to a coil type permanent magnet electric levitation device for maglev trains. Background technique [0002] Maglev train is a means of transportation that realizes non-contact movement through electromagnetic force. Since German engineer Kemper proposed the concept of maglev train in the 1920s, this new mode of transportation has become the main mode of future transportation due to its advantages of high speed and safety. one. After nearly a hundred years of development, maglev trains have gradually formed two main types: Electromagnetic Suspension (EMS) and Electric Repulsion Suspension (EDS). Among them, the electromagnetic suction suspension uses the suction force generated by the electromagnet and the magnetic material as the suspension force. At present, this method is the most common and mature. But suction is an unstable force, so this kind of maglev mode needs to ...

AI Technical Summary

Problems solved by technology

Although the bilateral permanent magnet electric levitation method based on the thin plate structure proposed by Chen Yin of Southwest Jiaotong University can reduce the electromagnetic resistance at low speed, it is not suitable for high-speed fields due to the skin effect.

Moreover, the mechanical strength of the thin-plate structure is low, and it cannot bear the gravity of the train under normal circumstances, so it is not conducive to its engineering

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