High-efficiency high-thrust double-sided linear motor with excitation regulation function

Abstract

The invention belongs to the linear motor and linear motor driving field and relates to a high-efficiency high-thrust double-sided linear motor with an excitation regulation function. Double-sided primary sides and a double-sided secondary side located between the double-sided primary sides are matched with each other so as to form the double-sided linear motor; the double-sided secondary side is composed of at least one group of magnetic flux concentrators and magnets which are installed in a surface-mount manner alternately, the magnetizing directions of adjacent magnets face each other or depart from each other; each magnetic flux concentrator is provided with an excitation coil; the magnetic flux concentrators provide a passage for the series and parallel magnetic path of double-sided secondary permanent magnets, direct current excitation and double-sided primary sides; magnetic resistance is small, leakage flux is decreased greatly and is even completed eliminated; an excitation regulation ability is increased significantly; a bottleneck problem that restricts the engineering application of a linear motor for a long term is solved; and under the same size and manufacture cost, the power and output of the motor can be greatly increased, or under the same power, the size, manufacture and use cost of the motor can be greatly decreased. The linear motor of the invention is particularly applicable to to high-thrust, high-power and long-stroke linear motor engineering application conditions which require magnetic levitation guide control.

Description

technical field [0001] The invention belongs to the field of linear motors and their drives, in particular to a high-efficiency and high-thrust bilateral linear motor with excitation adjustment. Background technique [0002] Linear motors have been widely used in various industries. In many application fields and occasions such as linear motor direct drive elevators, linear motor subways, maglev trains, linear motor machining centers, and automated assembly lines, not only the thrust of linear motors is required to be large, but also the adjustment of magnetization and field weakening of linear motors is often required. Thrust adjustment, normal force adjustment, non-contact guidance control, etc., need to adjust the excitation field. The existing permanent magnet linear motor structures mainly include hidden pole type and salient pole type. The salient pole type permanent magnet linear motor structure is as follows: figure 1 (salient pole unilateral structure) and figur...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing hybrid excitation linear motor has problems such as small output, low adjustment ability, large excitation power and volume, and high cost. High-efficiency high-thrust bilateral linear motor with excitation adjustment

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