A Complementary Fault-Tolerant Linear Motor

Abstract

The invention discloses a complementary-type fault-tolerant linear motor, and belongs to technical field of motor manufacture. The complementary-type fault-tolerant linear motor comprises a primary and a secondary, wherein the secondary adopts a salient pole structure with the same tooth width; an airgap is formed between the primary and the secondary; the primary comprises an even number of modules; each module comprises a plurality of armature teeth of salient pole structures; each armature tooth is wound by a concentrated winding; a permanent magnet is pasted at the lower part of each armature tooth; and adjacent modules are connected with each other by magnetic conducting materials. According to the invention, a conventional method adopting an oblique pole, additional arrangement of auxiliary teeth and the like to reduce the end effect is not adopted by the motor, and the purpose of weakening adverse effects caused by the end effect in the linear motor only by adopting a simple complementary-type structure is achieved, thereby obtaining more symmetrical and sinusoidal back EMF (Electromotive Force), smaller positioning force and thrust fluctuation. According to the motor provided by the invention, fault-tolerance teeth or isolated teeth, which occupy slot space, are not adopted, so that higher fault tolerance can be obtained on the premise of not sacrificing power density of the motor.

Description

technical field [0001] The invention belongs to the technical field of motor manufacturing, and more precisely relates to a primary permanent magnet linear motor, especially suitable for the linear drive fields requiring high reliability and high efficiency, such as wheel-rail transportation. Background technique [0002] In the past, when linear motion was required, the intermediate transmission was usually driven by a rotary motor to convert the rotary motion of the motor into linear motion. However, due to the complex structure of the intermediate mechanical transmission device, it is prone to friction and wear during long-term operation, resulting in a decrease in accuracy, which brings problems in improving control accuracy and movement reliability. At the same time, the position, speed, and acceleration are subject to the mechanical structural characteristics (stiffness, inertia) of the transmission device, which also restricts the improvement of the performance of hig...

AI Technical Summary

Problems solved by technology

However, under the condition of a certain primary length of the linear motor, no matter whether the fault-tolerant teeth made of magnetic materials or the isolation teeth made of non-magnetic materials are added, a certain slot space will be occupied, thereby reducing the power density of the motor.

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