SU526989A1 - Linear motor - Google Patents

Description

one

The invention relates to the field of electrical engineering and can be used in machines and mechanisms with the translational movement of the working tool.

Linear electric motors 1 are known, which contain a flat inductor and measles with a collector, made on the stroke of the electric motor, which exclude the possibility of emergency braking of the core in the event of an emergency shutdown of the supply voltage and possible exit from the string.

The closest solution to the proposed one is a linear machine 2, in which the collector plates are mounted movably, and w, the holder is made in the form of an insulating base with fixed w, flutes. This linear machine is distinguished by increased smoothness, high speed, but also is not protected from damage in the event of a power supply outage. When the current lead w, their wires to the motor core are broken, braking is not ensured and the motor measles, having a considerable supply of kinetic energy, hits the travel stops and collapses.

The aim of the invention is to develop such a linear motor design, in which reliability is improved.

machines in case of an accidental breakdown

The goal is achieved by the fact that at each end of the w, ederderl a busbar bus is located, mounted flush with the upper end of the brush holder, placed above the permanent magnets of the frame.

The proposed device for a linear electric motor is schematically shown in the drawing.

The linear electric motor consists of a bed 1, a bed 2, a box 3 on which a collector is fixed, containing an insulating sleeve 4 and collector plates 5. The latter can be moved in the cells of the sleeve 4 by spring action towards the brush holder 6 mounted on the bed along the course of the core 3 The pa brush holder 6, in places corresponding to the neutrals of the pluses, has fixed brushes 7, whose working surface forms a single plane with the surface of the brush holder 6. The poles 8 with the excitation windings are located on the base 1 along the entire length of the course of the core.

At the ends of the brush holder 6, the conductive busbars 9 are arranged flush with its upper end, under which the permanent magnets 10 are placed. The spring shock absorber 11 serves to completely stop the engine.

The linear electric motor works as follows.

When voltage is applied to the brushes 7, a current flows through the core winding. As a result of the interaction of the magnetic flux of the poles 8 and the current of the core, the driving force that will move the measles along the path along the bed air gap. As the core moves, the collector will, with its movable plates 5, switch sections of the coria winding, as in a conventional ground current mask. The speed of movement of the box over a wide range is regulated by the supply voltage.

In the event of an emergency shutdown of the power sources — the excitation winding and the core winding — the measles 3 continues to move by inertia and enter the brake portion of the brush holder 6, where the excitation flow is generated by permanent magnets 10. The core will be induced by the windings that short shortly as the plates 5 hit the conductive ischine 9. An intensive electrodynamic braking mode is created with shorted sections

root winding. In contrast to the mode of electrodynamic braking of a motor with a constant current created by shorting the brushes, more favorable conditions are created for the flow of the braking current.

Claims (2)

1. US patent jYg 3136934, cl. 318-130, 1961. 2. Auth. St. No. 445661, cl. H 02 K 33/00, 1971.