Linear asynchronous motor

IPC classes for russian patent Linear asynchronous motor (RU 2510867):

H02K41/025 -

Another patents in same IPC classes:

Linear asynchronous electric drive / 2494522

Linear asynchronous electric drive comprises an inductor 1, comprising a core, on teeth 2 of which there are winding coils 3, and an electroconductive anchor 4. In each upper part of teeth there are two screening turns 5, outputs of which are connected to contacts of sealed-contact relays 6, coils of which are connected with a switching device. The switching device provides for the possibility of simultaneous closure of at least four screening turns, placed on four adjacent teeth of the inductor, which form the initial row. In first two teeth the turns that screen their right parts are closed, and in the third and fourth teeth the turns are closed, which screen their left parts. To start a pitch of the electroconductive anchor, the switching device opens a turn that screens the left part of the fourth tooth, and to complete the pitch - it opens a turn that screens the right part of the first tooth, closes turns that screen the right parts of the second and third teeth, and a turn screening the left part of the fifth tooth. To fix the electroconductive anchor, after the pitch the switching device opens turns that screen the third and the fourth teeth, and disconnects winding coils arranged on these teeth from the source of voltage.

Cylindrical linear induction motor / 2488936

Proposed motor comprises inductor with three-phase winding composed of coil modules 1 alternating axially with ferromagnetic washers 2 and ferromagnetic yoke 3. Armature comprises ferromagnetic core 4 supporting alternating ferromagnetic and electrically conducting rings 5, 6, respectively. Armature has bore to accommodate cylinder 7 furnished with handle 8 and consisting of two types of alternating rings. First type of rings consists of combined conducting and insulating parts 10, 11, respectively. Second type represents ferromagnetic rings 12.

Linear asynchronous electric drive / 2472275

Linear asynchronous electric drive (LAED) 1 comprises an inductor (2) made of two conductors with a winding consisting of separate coils arranged at conductor teeth and an electroconductive anchor. There are two screening turns arranged on inductor teeth, outputs of which are connected to a reed relay, coils of which are connected to a switching device that provides for the possibility of simultaneous closing of at least eight screening turns arranged on four neighbouring teeth of both conductors and forming an initial row. Near the first two teeth on each conductor there are turns closed, which screen their right parts in direction from the left to the right. On the third and fourth teeth there are turns closed, which screen their left parts. To start the pitch of the electroconductive anchor, the switching device opens two turns that screen left parts of fourth teeth in both conductors. And to complete the pitch - it opens turns that screen the right parts of the first teeth in both conductors and closes turns that screen the right parts of the second and third teeth of both conductors, and turns that screen the left parts of the fourth and fifth teeth. On each tooth additionally there are short-circuit turns arranged at sides of conductor teeth adjacent to each other, which partially screen them and perpendicular to turns screening right and left parts of their every tooth.

Secondary element of linear asynchronous motor / 2468492

Secondary element of linear asynchronous motor includes electroconductive 1 and magnetoconductive parts. Electroconductive part 1 includes rods 2 closed with buses 3 on both sides. Rods 2, which are perpendicular to buses 3, are equipped with additional rods 4, which electrically attach rods 2 to sections of buses 3 forming an external arc in curved section. Additional rods 4 are located in relation to sections of buses at an angle differing from the right angle.

Linear asynchronous electric drive / 2461114

Linear asynchronous electric drive 1 contains an inductor consisting of a core including a heelpiece 2 and teeth 3. The heelpiece 2 is designed in the shape of a rectangular lattice at the points whereof the teeth 3 are positioned. The electrically conductive secondary element 4 is positioned on ball rests 5. The inductor winding 6 is designed to be single-phase. Each teeth has three loops positioned in its butt-end part, all the loops outlets connected to circuit closer devices such as reed relays. The first pair of loops 7 are positioned parallel to each other while the other pair of loops 8 is perpendicular to the first one. The pairs of loops 7 and 8 are intended for shielding the tooth edge parts. The coils 9 of the reed relays are connected to the commutation device 10 controlling the magnetocontrollable contacts 11 of the reeds. The single-phase winding 6 coils are connected to a single-phase voltage source via the master switch 12. Fixation of the electrically conductive secondary element 4 may be performed by four longitudinal or four cross-wise rows of shielded teeth 3 with the loops shielding the last tooth in the row opened to provide for the secondary element pitch.

Electro-mechanical converter for impact machines / 2454777

Electro-mechanical converter includes asynchronous linear cylindrical engine (ALCE) of alternating current in the stator housing 1 of which there located are stator coils 2. The housing 1 is connected to the housing 11 of linear cylindrical engine (LCE) of direct current. The armatures of the said engines are united with the possibility of adjusting the acceleration of the formed common armature and its reciprocating movement within the limits coaxially the stator 2 coils in slider bearings 5 of ALCE, slider bearings 10, 71 of LCE. Common armature is equipped with stabilisation means preventing its turning about axis. LCE is performed in a form of accelerator and serves for providing a necessary speed to the common armature in the end of working stroke.

Submersible plunger pump unit and its linear electric motor / 2422676

Device is intended for oil lifting from wells and can be used for pumping-out of formation water and mining operations of underground mineral resources laid at big depths in liquid state. Device includes housing (1), electric motor (2), stock (7), plunger (8), cylinder (10), inlet and outlet valves (12, 13), drain electromagnetic valve (18), which are connected to tubing string (14). In bilateral unit cooled with pumped liquid with linear electric motor (2) cooled with dielectric liquid there installed is the second plunger (9), the second cylinder (11) and the second pair of valves (15,16). Linear electric motor (2) includes housing (3), double-ridge stator (4), the secondary element (7). Secondary element (7) is made from electrically conducting long multi-layer plates (21) with transverse slots (22) offset relative to each other and filled with dielectric material.

Linear asynchronous motor / 2416864

In linear asynchronous motor with open magnetic conductor containing the inductor consisting of core and multi-phase winding, and secondary element including the core in slots of which there arranged one under the other are at least two electrically conducting pins of secondary winding, thus forming vertical row, which are closed on one side with common electrically conducting bus; according to invention, each electrically conducting pin is connected to its electronic switching-control instrument connected to common electrically conducting bus closing electrically conducting pins on the other side and connected to multi-channel programmable control with feedback as to movement speed of secondary element.

Linear asynchronous motor / 2404502

Linear asynchronous motor comprises inductor made of core with three-phase winding. Secondary element comprises core, in slots of which there are insulated electroconductive rods arranged one over the other as closed at one side by a common electroconductive bus, and at the other side - by closing cylinder made of electroconductive and insulating parts, installed with the possibility of rotation around its horizontal axis. Secondary element comprises additional electroconductive rods arranged at both sides of electroconductive rods arranged in central part of secondary element and arranged at the angle to it. Secondary element is equipped with additional cores arranged along both sides from core, in slots of which there are central parts of electroconductive rods installed. Additional electroconductive rods arranged in slots of core arranged to the left of the main one are closed at the left side by additional electroconductive bus, and at the right side - by the same electroconductive bus, which closes rods arranged in central part of secondary element, and additional electroconductive rods arranged in slots of core arranged to the right of the main one, are closed at the right by another additional bus, and to the left - by electroconductive part of closing cylinder.

Linear asynchronous motor / 2402860

Linear asynchronous motor contains an inductor composed of a core (1) with a multi-phase winding (2), a secondary element (3) containing a core (4) in the grooves whereof, one over another, insulated conductive rods are positioned (5) closed on one side with a common conductive bus (6) and on the other - with a closing cylinder (7) composed of a conductive part and an insulating part, with a handle (8). The grooves of the core (4) of the secondary element (3) contain a central part (9) perpendicular to the horizontal axis of the closing cylinder (7). Adjacent thereto at identical angles on both sides are side parts (10 and 11). All the conductive rods shaped matches that of the groove. Adjacent to the central parts (9) on both sides are additional parts (12 and 13), serving as their extensions and perpendicular to the closing element (7) axis.

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FIELD: electricity.

SUBSTANCE: invention refers to electric engineering and can be used in electric drives with non-linear or reciprocal motion of actuators. Linear asynchronous motor (LAM) contains inducer 1 consisting of core 2 and three-phase winding 3, and secondary element 4 connecting core 5 with grooves containing central straight portions and side portions adjoining them at both sides at equal angles. Electroconductive rods have the shape of the above grooves and are closed at both sides by electroconductive elements 6. Electroconductive rods place in side parts of grooves consist of two sections interconnected by closing contacts 14 of reed relays, which outputs 7 of windings are connected to direct-current source through reed relays 8. Inducer 1 contains permanent magnets 9 interconnected with the inducer mechanically and located at its both sides.

EFFECT: increasing efficiency factor and possible increase of transversal mechanical efforts only when inducer symmetry is violated in regard to the secondary element.

2 dwg

The invention relates to the field of electrical engineering, and more specifically to linear induction motors (LAD), which is designed for cables with rectilinear or reciprocating movement of the working bodies.

Known linear induction motor containing an inductor consisting of a core and three-phase winding, and a secondary element that contains a core with grooves having a Central part, perpendicular to the longitudinal axis of the secondary element, and adjacent to the Central portions of both sides under the same angles the sides of the slots, the slots are electrically conductive rods, the shape of grooves and closed from both sides of the electrically conductive elements (see U.S. Pat. 2349018, IPC H02K 41/025, 2008). This WAY its technical characteristics most similar to the claimed device and selected as a prototype.

Its disadvantage is that efforts transverse semistability are created but not used and useful in symmetric arrangement of the inductor FRET about its secondary element. This also leads to reduction in the efficiency of FRET.

The technical task of the present invention is the removal of the marked lack of developed design of a linear induction motor.

The solution of the technical problem is achieved by the fact that Lin is enom asynchronous motor containing an inductor consisting of a core and three-phase winding, and a secondary element that contains a core with grooves having a Central part, perpendicular to the longitudinal axis of the secondary element, and adjacent to the Central portions of both sides under the same angles the sides of the slots, the slots are electrically conductive rods, the shape of grooves and closed from both sides of the conductive elements according to the invention to the Central parts of the grooves on both sides adjoin additional straight sections, with an additional electrically conductive terminals, each of which is electrically connected to one side of the conductive rods in the Central parts of the slots, and the other hand with the conductive elements with the conductive rods lying in the lateral parts of the grooves, is made of two parts interconnected by means of closing the contacts of the reed relay, the conclusions of the windings which are connected with the constant current source through the switches placed on both sides of the secondary element outside of the conductive elements, while on both sides of the inductor mounted permanent magnets, the length of which is equal to the length of the induction coil is mechanically connected to the core of the inductor.

Additional straight past the Cove, adjacent to the Central portions of the grooves of the secondary element, the execution of conductive rods placed in the lateral parts of the slots, of two parts, connected by means of closing the contacts of the reed relay, the combination of these windings with a source of direct voltage through the switches placed on both sides of the secondary element outside of the conductive elements, installing permanent magnets on both sides of the inductor, mechanically associated with it, all affect the novelty and the essential features of the claimed technical solution.

The invention is further illustrated by the example of embodiment with reference to the accompanying drawings, in which

- figure 1 depicts the cross-section TWIST (schematically);

- figure 2 shows schematically in top view a secondary winding of the linear induction motor.

Linear induction motor (figure 1) contains the inductor 1, consisting of the core 2 and the three-phase winding 3. Secondary element 4 contains the core 5 with grooves (not shown in figure 1)having a Central portion and adjacent to the Central portions of both sides under the same corners of the side parts, the slots are electrically conductive terminals (not shown in figure 1), the shape of grooves and closed from both sides of the conductive elements 6. Electrical wiring in providesa rods, lying in the lateral parts of the grooves, is made of two parts connected by a trailing contact reed relays (not shown in figure 1), conclusions 7 windings (not shown in figure 1) connected to the DC source through the switches 8. The switches 8 are placed on both sides of the secondary element 4 outside of the conductive elements 6. On both sides of the inductor 1 LAD installed permanent magnets 9, the length of which is equal to the length of the inductor, and they are mechanically linked by a core 2 inductor.

The secondary winding of element LAD is depicted schematically in figure 2. Conductive rods 10 are located in the Central parts of the slots of the secondary core element, joining them additional conductive rods 11, forming together with electrically United with them conductive rods 10 rods, perpendicular to the longitudinal axis of the secondary element. Conductive side bars (lying in the lateral parts of the grooves) is made of two parts 12 and 13 each. Parts 12 and 13 are interconnected by closing contacts 14 reed relays, conclusions 7 windings 15 are connected through the switches 8 with a constant current source.

Consider the operation of this linear induction motor. When connected three-phase winding 3 to the voltage source excited by a traveling magnetic the field, crossing the short-circuited secondary winding element 4 (Fig 1) and leading electromotive force (EMF), under which a short-circuited secondary winding element (WCE) LAD will flow currents. With the symmetric arrangement of the inductor 1 relative to the secondary element 4 in the transverse direction (figure 1) squirrel-cage winding VE formed by straight sections, consisting of electrically connected conductive rods 10 and 11, and the conductive terminals 11 are placed on both sides of the rods 10. The straight sections formed by electrically conductive rods 10 and 11, on both sides of the core VE shorted conductive elements 6 (figure 2). In the result of the interaction of a traveling magnetic field and currents in the straight sections of the squirrel-cage winding VE created traction TWIST, under which the inductor will begin to move in the direction opposite to the direction of movement of the traveling magnetic field. Traction LAD and his efficiency in this operating mode, the engine will be maximum. If under any circumstances the inductor MOOD will shift to the side in the transverse direction, for example to the right, together with the inductor will be displaced and the permanent magnet 9, and the one that will be to the right of the inductor 1, raspolojit is over switches 8, located to the right of the VE (figure 1 and 2). The magnetic field of the permanent magnet 9, crossing the switches 8, will lead to the closure of their contacts. The constant current source is connected winding 15 reed relays, which will lead to the closure of the contacts 14, the electrically connecting parts 12 and 13 electrically conductive rods lying in the lateral parts of the slots of the core 5 VE (figure 1 and 2). In this case, the short-circuited winding VE LAD is formed by straight sections (as in the previous case), plus side plots in the right part of the secondary element. Traveling magnetic field will cross and lateral parts squirrel-cage winding VE and to direct them in EMF and currents. The currents in the lateral parts, interacting with the traveling magnetic field will generate the mechanical force directed perpendicular to the side sections in the right part of the squirrel-cage winding VE. These mechanical efforts decompose for extra traction, which are formed with traction forces created by the interaction of currents in the straight parts with a traveling magnetic field, and the transverse mechanical forces acting from right to left, i.e. the efforts of transverse stabilization. Under the action of transverse mechanical force inducer LAD seeks to return to the previous symmetric with respect to the wing position at which the contacts of the reed switch 8 and amakusa contacts 14 reed relays will open. Since the magnetic field of the permanent magnets will be crossing the switches 8, LAD again will work in an optimal manner, and the efforts of the transverse stabilization will occur only when the violation of the symmetrical arrangement of the inductor LAD and his secondary element. Compared with the prototype increased efficiency LAD and achieved the possibility of obtaining transverse mechanical force only when the violation of the symmetry of the inductor relative to the secondary element.

Linear induction motor containing an inductor consisting of a core with three-phase winding, and a secondary element, consisting of a core with grooves having a Central part, perpendicular to the longitudinal axis of the secondary element, and adjacent to the Central portions of both sides under the same angles the sides of the slots, the slots are electrically conductive rods, the shape of grooves and closed from both sides of the conductive elements, wherein the Central portions of the grooves on both sides adjoin additional straight sections, which placed additional electrically conductive terminals, each of which is electrically connected on one side with conductive rods in the Central parts of the grooves, and on the other side with the conductive elements with the conductive with erini, lying in the lateral parts of the grooves, is made of two parts interconnected by means of closing the contacts of the reed relay, the conclusions of the windings which are connected with the constant current source through the switches placed on both sides of the secondary element outside of the conductive elements, while on both sides of the inductor mounted permanent magnets, the length of which is equal to the length of the induction coil is mechanically connected to the core of the inductor.