The straight line motor is that one kind converts electric energy to the electric transmission device of the mechanical energy of rectilinear motion directly. It can save a large number of middle actuators, the quickening system reflects the speed, improve the systematic accuracy, so is widely used. The kind of the straight line motor can be divided into according to the structural form; Unilateral getting flat, bilateral getting flat, round disc shape, drum type ‘ Or is called the in charge ofing type When; Can be divided into according to operation principle: Direct current, asynchronous and moving ahead simultaneously and walking into etc.. Below to easy to use simple in construction only, run reliable asynchronous motor of straight line make the brief introduction.
The structure of the asynchronous motor of straight line mainly includes the stator, touches the support wheel three part of son and rectilinear motion. In order to there are good electric magnetic fields that are coupled while guaranteeing the stator within the range of journey and moving the sons, stator and touching the son’s unshakable in one’s determination length. The stator can make two kinds of forms of short stator and long stator. Because the long stator structure is with high costs, run costlily, seldom adopt. The straight line motor, like rotating the magnetic field, the stator is unshakable in one’s determination but folded by silicon steel sheet too, there are tooth’s sockets on the surface; Inlay three phases, two phase or single-phase winding in the trough; The single-phase straight line asynchronous motor can make the type into the cover very much, can also move the looks through the electric capacity. Touching the son and having three kinds of forms of asynchronous motor of straight line:
1Move son, touch son, lead the magnetic material, make magnetically ‘ Stencil plate ,Not only play a magnetic way role but also touch the son and play a conductive role as the cage type.
2Not touching the son magnetically, it is by the non- magnetisable material copper to touch the son Make, mainly play a conductive role, the air crack of such formal motor is relatively big, electric current of excitation and lossing greatly.
3Touch the son and lead the surface of magnetic material and cover a layer of conductive materials, lead the magnetic material and lead the magnetism to act on only as the magnetic way; Cover the conductive material and make cage type winding.
Because of asynchronous motor of straight line moving the son magnetically being simple in construction, touch the son and is not merely regarded as and led magnetism, conductive body, can even be regarded as the structural part, its application has a bright future.
The operation principle of the asynchronous motor of straight line is the same as asynchronous motor of rotary system, the winding of the stator links with alternating current source, after by exchanging the electric current heterogeneously, produce a steady row wave magnetic field when the radius of magnetic field is very large to rotating in the angry crack, become the row wave magnetic field of rectilinear motion . This magnetic field does rectilinear motion along the angry crack, meanwhile, electro-motive force happens in reaction in moving the sub conductor, produce electric current, the electric current with competent the intersection of wave and magnetic field interact, produce asynchronous motive force, make, touch son wave direction act as rectilinear motion along walk. If change the looks preface of power in the asynchronous motor stator winding of straight line, then the row wave magnetic field can move the direction too conversely, according to this principle, can make the lineal asynchronous motor make reciprocal rectilinear motion.
The straight line asynchronous motor is used mainly in the rectilinear motion organization of bigger occasion of the power, if the door opens and closes the device, the mechanical equipment lifted, transmitted and gone up and down automatically, drive the vehicle, especially used for the high speed and overspeed transportation,etc.. Because the traction force or motive force can be produced directly, move the part in succession the middle not needing, not rubing, without noise, there is not rotor that generate heat, question of free of centrifugal forcing etc.. So, its application will be wider and wider. The synchronous motor of straight line because performance is superior, employ the occasion to be the same as asynchronous motor of straight line, have the tendency to replace. The straight line walks into the motor and applies to the numerical control plotter, recording instrument, counts picture controlling machine, numerical control cutting out machine, memory of the magnetic disc, accurate to orient in apparatuses such as the organization,etc..