An adjustable air gap ironless linear motor

Abstract

The invention discloses a gas-adjustable iron core-free linear motor. The motor comprises a base, a line insertion groove, a stator coil and a mover, wherein the line insertion groove is formed on the base; the mover is transversely arranged on the base in a sliding way; a permanent magnet is arranged inside the mover; the mover is formed by splicing a first mover and a second mover positioned on both sides of the stator coil; the first mover and the second mover can move towards or away from each other in a longitudinal direction to adjust the distance between the two movers. The distance between the two movers can be adjusted effectively by moving the two movers, thereby realizing adjustment of the motor gap. When large motor driving force is needed, the two movers are moved towards each other to reduce the gap of the motor, the gap flux density is increased, and strong thrust force is produced by the motor; during high-speed running, the two movers are moved away from each other to increase the gap of the motor, the gap flux density is decreased, the counter electromotive force is reduced, and the resonant counter electromotive force is reduced, so that damages to each element in the motor are reduced, the service life of the motor is prolonged, and the use cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of design and manufacture of an iron-core linear motor, and in particular relates to an iron-less linear motor with an adjustable air gap. Background technique [0002] Linear motor is a transmission device that directly converts electrical energy into linear motion mechanical energy without any intermediate conversion mechanism. It can be regarded as a rotating motor cut radially and developed into a plane. [0003] Rare earth permanent magnet ironless motor is a new type of motor for the future development of motors. It adopts ironless, brushless, non-magnetic damping, and rare earth permanent magnet power generation technology, which changes the structure of traditional motors using silicon steel sheets and winding stators. Combined with the self-developed electronic intelligent frequency conversion technology, the efficiency of the motor system is increased to more than 95%, which significantly improves...

AI Technical Summary

Problems solved by technology

In order to improve the driving force of the iron-less linear motor, the general linear motor is designed with a double-sided structure, which increases the back electromotive force of the motor and requires higher DC bus voltage, and the back electromotive force is more harmful. If the back electromotive force is large , if it is not handled properly, it is likely to damage the components of the motor, resulting in a reduction in the service life of the motor and an increase in the cost of use

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