A homopolar hybrid excitation linear synchronous motor

Abstract

The invention discloses a homopolar hybrid excitation linear synchronous motor, comprising a primary, a secondary and two air gaps formed between the primary and the secondary; the primary comprises a primary iron core, a primary armature winding, an excitation core, and a ring excitation Windings, permanent magnets, the secondary includes the secondary back yoke iron core and the iron core tooth pole array, the iron core tooth pole array is divided into four groups, the distance between two adjacent iron core teeth in the same group is τ, and τ is the pole distance , the core teeth of the two groups are staggered, the staggered spacing is τ, and the electrical angle differs by 180 degrees. The invention has simple secondary structure, small eddy current loss, high efficiency, low processing cost, can realize self-levitation, no mechanical contact, and the structure of hybrid excitation makes the air gap magnetic field strong, flexible and variable, the thrust is large and the adjustment is convenient, and the control system is also It is easy to implement, and the length of the air gap can be guaranteed by adjusting the excitation current, which is suitable for occasions with large air gaps, such as the field of high-speed maglev trains, which reduces the requirements for the track.

Description

technical field [0001] The invention belongs to the field of linear synchronous motors, and more particularly, relates to a same-pole hybrid excitation linear synchronous motor. Background technique [0002] With the exploration and development of linear motor technology, there are more and more applications of linear motor as a driving device in the field of transportation. Linear motors eliminate the need for intermediate drive couplings, and have great advantages over rotary motors. With the pursuit of speed by human beings, maglev trains have become a research hotspot in the field of transportation. The use of linear synchronous motor as the drive of the maglev train has certain advantages. The linear synchronous motor can generate thrust and levitation force at the same time, and there is no need to separately set up a supporting device to achieve suspension, which makes the device structure simple. However, at present, the air gap magnetic field of the linear synchro...

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Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the present invention proposes a linear synchronous motor with hybrid excitation of the same polarity, which combines the advantages of permanent magnet and electric excitation linear synchronous motors, and reduces the eddy current loss generated in the secondary of the linear motor, so that the secondary structure The solid iron core can be used, the processing technology becomes simple, and the problem of large secondary eddy current loss and high processing cost of the linear synchronous motor is solved

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