Soft-start permanent magnetic coupler

Abstract

The invention relates to the technical field of transmission shaft coupled driving and powered dragging, and specifically relates to a soft-start permanent magnetic coupler. In a stationary state, the middle of a permanent magnetic disk and an inductor is at a position L1. When a motor is started, the induced magnetic field formed between the permanent magnetic disk and the inductor is maximized due to large speed difference. The forces of the induced magnetic field repel each other. The repelling force is greater than the attracting force between a permanent magnetic backboard and a driving magnet. Thus, the inductor is pushed to move to L2 axially. The speed of the inductor gradually increases, the speed difference decreases, the magnetic induction force decreases, the permanent magnetic force strengthens and gradually narrows the gap between the permanent magnetic disk and the inductor, the torque transferred increases, and the speed of a permanent magnet increases and reaches the rated speed finally. The beneficial effects are as follows: the inductor is arranged symmetrically relative to the permanent magnetic disk, the magnetic line of force is fully utilized, and torque transfer is efficient; the purpose of soft start is achieved through the change of the permanent magnetic force and magnetic induction force with speed difference; and the soft-start permanent magnetic coupler has the advantages of high transfer efficiency and good soft start effect.

Description

Technical field [0001] The invention relates to the technical field of transmission shaft coupling driving and power dragging, in particular to a soft-start permanent magnet coupler. Background technique [0002] Existing motors generally use direct starting, and the motor starting causes excessive current, which affects the normal operation of other equipment, and may even endanger the safety of the motor and the transformer. [0003] In the traditional permanent magnet coupler, the position of the drive disk and the driven disk are relatively fixed. [0004] It does not serve the purpose of soft start. [0005] CN205178839U points out that: in the existing known delay type magnetic couplers, they are all dual-conductor-disc and dual-magnet-disc structures, and the magnetic field coupling intensity is adjusted by moving the magnet disc by the axial magnetic force generated in the magnetic coupling, and the moving distance is short (Usually only 3-5 mm, the magnetic coupling strength...

AI Technical Summary

Problems solved by technology

[0004] Does not serve the purpose of soft start

[0005] CN205178839U points out: in the existing known delay type magnetic force coupler, all are double-conductor disk double magnet disk structure, the adjustment of magnetic field coupling intensity is the axial magnetic force that produces in magnetic coupling and moves magnet disk and forms, and moving distance is short (Usually only 3-5 mm, the adjustment of magnetic coupling strength is not gradual, and the delay time is short, the delay effect is very limited, and the soft start effect cannot be produced for large inertia and heavy load equipment, and the coupling between the magnet disk and the conductor disk in its structure is only One side of the magnet is used, and the other side is closed with a magnetically permeable steel plate, and the magnetic coupling performance of the permanent magnet is only half utilized.

The delay effect is not obvious, so that the delay buffering effect on the load equipment in the startup phase cannot be achieved

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