Bilateral mixed excitation type high-thrust linear synchronous motor

Abstract

The invention discloses a bilateral mixed excitation type high-thrust linear synchronous motor. The bilateral mixed excitation type high-thrust linear synchronous motor comprises magnetic poles and armatures, wherein the armatures are arranged in two rows in a back-to-back manner; and the magnetic poles are arranged at two sides of the armatures. Each magnetic pole comprises a tooth-shaped back iron, an adjustable DC (Direct Current) exciting winding arranged between teeth of each back iron in an embedded manner, and a permanent magnet arranged on the teeth of each back iron. Each armature comprises two tooth-shaped armature iron cores which are arranged back to back; the back part of each armature iron core is provided with a cooling pipe groove; an armature winding is arranged between the teeth of the armature iron cores; the cooling pipe groove at the backside of each armature iron core is internally provided with a transverse cooling pipeline or a lengthways cooling pipeline. Each magnetic pole of the invention is provided with the permanent magnet and an electric exciting winding; an air-gap magnetic field is provided through the adoption of a mixed excitation way; and each armature is provided with an armature winding, the armature iron cores and cooling pipelines. As a double-row type staggered assembling structure is adopted by the armatures in the invention, the side end effect is reduced; as a built-in cooling structure is adopted by the armatures adopt, thrust density is improved; and as the mixed excitation structure is adopted by the magnetic poles, the air-gap magnetic field is flexible and adjustable.

Description

technical field [0001] The invention relates to a bilateral mixed excitation type high-thrust linear synchronous motor. Background technique [0002] Compared with the linear induction motor, the permanent magnet linear synchronous motor has the advantage of high thrust density, but the disadvantage of large thrust fluctuation. The high-thrust linear synchronous motors currently used in high-speed CNC machine tools are all permanent magnet structures. In order to further increase the thrust and overcome the shortcomings of large thrust fluctuations, the bilateral cooling structure is an optional structure. For the large-thrust permanent magnet linear motors retrieved so far, the permanent magnets are basically surface-mounted unilateral structures. The permanent magnets are installed on the back iron as the long stator, and the armature winding is embedded in the laminated iron core as the mover. The system exists There is a large edge force, and the mover has a large unila...

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Problems solved by technology

[0003] The invention provides a double-sided mixed excitation high-thrust linear synchronous motor, which is suitable for high-speed numerical control beds, linear conveying devices, linear test platforms and other applications that require high stability and large thrust, and solves the problem of edge force existing in current permanent magnet linear synchronous motors. , The air gap magnetic field is difficult to adjust, and the thrust density is not high

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