Semi-magnetic barrier type dual-field excitation linear synchronous generator

Abstract

The invention discloses a semi-magnet-isolated double-excitation linear synchronous motor. It includes primary iron core, primary winding, secondary iron core, secondary excitation winding, secondary excitation winding slot, permanent magnet, generator and cogging, and secondary excitation winding is wound on the core teeth and placed on the secondary excitation In the winding slot, the characteristic is that there are two permanent magnets for excitation under each magnetic pole, placed obliquely, corresponding to each other, fixed in the embedded groove in the middle of the secondary yoke, and facing upward at an angle of 120°. There is a trapezoidal magnetic isolation air between the adjacent ends of each pair of permanent magnets; the faces of the same polarity of the two permanent magnets under the same magnetic pole are facing the same direction, and the N and S magnetic poles are alternately distributed along the length direction of the secondary yoke; the permanent magnets The upper end is close to the secondary excitation winding slot and connected by the magnetic bridge of the secondary iron core. The integrity of the secondary iron core is good, and the levitation force and thrust of the motor are significantly increased under the same conditions. It is mainly used in various occasions of maglev transportation system drive and logistics line drive.

Description

technical field [0001] The invention belongs to linear synchronous motors. Specifically, it is a linear synchronous motor with long stator (primary) hybrid excitation. technical background [0002] The traditional linear synchronous motor has two separate excitation methods. One is to use the electric excitation generated by the DC winding. This excitation method can adjust the magnitude of the levitation force and thrust by adjusting the magnitude of the excitation current; The magnet provides the excitation magnetic field. Since there is no excitation electric power loss, the efficiency of this excitation method is high, but the disadvantage is that the magnitude of the excitation magnetic field cannot be adjusted, and the levitation force and thrust cannot be controlled by adjusting the excitation. Therefore, the method of hybrid excitation has received widespread attention and has begun to be applied, and the application research in the ...

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Problems solved by technology

Specifically, its permanent magnets are embedded in the secondary teeth close to the yoke, or are pasted on the surface of the secondary teeth, that is to say, the cross-sectional area of ​​the permanent magnets of each pole providing magnetic flux is the same as that of the teeth Yes, usually the cross-sectional area of ​​each pole magnetic flux provided by the permanent magnet will be limited, which will affect the efficiency

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