EP1818305A1 - Linear motion drive system for Rucksack type elevator - Google Patents

Abstract

The passenger cabin (24) is equipped with two linear elevations positioned vertically at its rear surface. Each of the elevations has a triangular cross section and is provided with flat magnetic elements (21) joined to the inwards pointing surfaces of the triangles. A column (20) with two inclined front areas is located at the rear wall of the shaft (26). When magnetic forces are activated at the column (20) the lift (24) is moved by the complementary forces (FN) transmitted from the magnetic elements (21). An independent claim is given for the linear drive.

Description

The invention relates to an elevator installation with a linear drive system according to the preamble of claim 1 and a linear drive system for an elevator installation according to the preamble of claim 14.

Various elevator configurations with linear motor drive systems are known. In such elevator configurations, however, a variety of problems occur that could only be partially solved so far. This is partly because some of the problems are diametrically opposed and the isolated solution to one of the problems often causes problems in other areas.

This conflict is explained below using an example. The linear motor drive systems, especially those working with permanent magnets, have very large attractive forces between a primary or stationary part and a secondary or moving part. If one uses such a permanent magnet linear motor now both as a direct drive system and as a suspension means of the elevator car, so an accurate and secure guidance of the elevator car must be ensured. In this regard, Figures 1A, 1B, and 2A, 2B show various basic configurations of elevator systems with permanent magnet linear drive systems.

In Figs. 1A and 1B, there is shown a configuration in which an elevator car 13 by means of a permanent magnet linear drive system 10, 11 is moved along a lift shaft in the y direction. Typically, such a permanent magnet linear drive system comprises a stationary part 10 fixed in the shaft and a movable part 11 fixed to the elevator car 13. It can be seen from the top view in FIG. 1B that, in such a configuration, no guidance takes place in the yz plane, so that additional guide shoes are to be provided on the elevator car 13, which arrange the elevator car 13 along the elevator car 13 from right and left Guide rails 12 lead. A comparable elevator installation is the patent application EP 0 785 162 A1 refer to.

In Figs. 2A and 2B, another basic configuration is shown. As can be seen in the top view in FIG. 2B, the permanent magnet linear drive system comprises a stationary part 10 and two movable parts 12. This achieves guidance in the y-z plane. However, in order to avoid tilting in the x-y plane, guide rails are also necessary, or the elevator car 13 would be supported by further suspension means, such as a cable 12 'mounted centrally on the elevator car.

The previously known approaches are therefore technically complex, they require a lot of material and space in the elevator shaft and are therefore costly.

Also, the known solutions are not or only partially suitable for elevator system in backpack configuration, which require only one wall of the elevator shaft for drive, suspension and guidance for structural or aesthetic reasons.

It is therefore the task to propose an elevator installation which requires little space in the elevator shaft when using a linear motor drive system.

It is considered another object to provide a linear motor drive system for a lift system in backpack configuration.

The solution of these objects is carried out for the elevator installation by the characterizing features of claim 1 and for a linear drive system by the characterizing features of claim 14.

Particularly advantageous features can be found in the dependent claims.

Fig. 1A

eine schematische Seitenansicht eines Teils einer ersten Aufzugsanlage mit einem Linearantriebssystem;

Fig. 1B

eine schematische Draufsicht der ersten Aufzugsanlage gemäss Fig. 1A;

Fig. 2A

eine schematische Seitenansicht eines Teils einer zweiten Aufzugsanlage mit einem Linearantriebssystem;

Fig. 2B

eine schematische Draufsicht der zweiten Aufzugsanlage gemäss Fig. 2A;

Fig. 3

eine schematische Seitenansicht eines Teils einer dritten Aufzugsanlage mit einem Linearantriebssystem, wobei es sich um eine Aufzugsanlage in Rucksackkonfiguration handelt;

Fig. 4A

eine schematische Perspektivansicht eines Teils einer ersten erfindungsgemässen Aufzugsanlage mit zwei beweglichen Teilen;

Fig. 4B

eine schematische Draufsicht der ersten erfindungsgemässen Aufzugsanlage gemäss Fig. 4A;

Fig. 5A

eine schematische Draufsicht eines Teils einer zweiten erfindungsgemässen Aufzugsanlage;

Fig. 5B

eine schematische Draufsicht eines Teils einer dritten erfindungsgemässen Aufzugsanlage;

Fig. 6A

ein weiteres Beispiel eines stationären Teils eines erfindungsgemässen Linearantriebssystems in schematischer Schnittdarstellung;

Fig. 6B

ein weiteres Beispiel eines stationären Teils eines erfindungsgemässen Linearantriebssystems in schematischer Schnittdarstellung;

Fig. 7A

eine schematische Draufsicht eines Teils einer vierten erfindungsgemässen Aufzugsanlage mit vier beweglichen Teilen;

Fig. 7B

eine schematische Draufsicht eines Teils einer fünften erfindungsgemässen Aufzugsanlage mit Hilfsführung;

Fig. 8

ein Teilansicht einer sechsten erfindungsgemässen Aufzugsanlage mit Notführung.

In the following the invention will be described in detail by means of exemplary embodiments and with reference to the drawings. Show it:

Fig. 1A

a schematic side view of a portion of a first elevator installation with a linear drive system;

Fig. 1B

a schematic plan view of the first elevator system according to FIG. 1A;

Fig. 2A

a schematic side view of a portion of a second elevator installation with a linear drive system;

Fig. 2B

a schematic plan view of the second elevator installation according to FIG. 2A;

Fig. 3

a schematic side view of a portion of a third elevator installation with a Linear drive system, which is an elevator system in backpack configuration;

Fig. 4A

a schematic perspective view of a portion of a first inventive elevator system with two moving parts;

Fig. 4B

a schematic plan view of the first inventive elevator system according to FIG. 4A;

Fig. 5A

a schematic plan view of part of a second elevator system according to the invention;

Fig. 5B

a schematic plan view of part of a third elevator system according to the invention;

Fig. 6A

a further example of a stationary part of an inventive linear drive system in a schematic sectional view;

Fig. 6B

a further example of a stationary part of an inventive linear drive system in a schematic sectional view;

Fig. 7A

a schematic plan view of part of a fourth inventive elevator system with four moving parts;

Fig. 7B

a schematic plan view of part of a fifth elevator system according to the invention with auxiliary guide;

Fig. 8

a partial view of a sixth elevator system according to the invention with emergency guidance.

There is known a configuration of an elevator installation in which the technical / mechanical components are typically mounted on only one shaft wall. Such a configuration is also referred to as a backpack configuration, since the elevator car sits like a backpack asymmetrically on a cabin frame, which is provided with support means on one side in the Lift shaft is suspended and guided. The fact that only one shaft wall is occupied, the three other walls of the elevator car as accesses are freely determinable and can accordingly have up to three car doors. The at least one car door can adjoin the rear wall of the elevator car provided for the technical / mechanical components, one then speaks of a side backpack configuration, or it can be attached to the rear wall of the elevator car opposite this rear wall, which is referred to as a normal backpack configuration becomes. The expert has many possibilities of realization in this regard.

In Fig. 3, the backpack principle is now transferred to an elevator system with permanent magnet linear drive system, which is a highly schematic representation. As indicated in Fig. 3, the elevator car 14 is mounted on an L-shaped cabin frame on the upright leg of the movable part 11 of the permanent magnet linear drive system is fixed. Perpendicular in the elevator shaft, the stationary part 10 of the drive is fixed (analogous to the arrangement shown in Fig. 1A). There are strong attractive forces between the moving part 11 and the stationary part 10, which are directed in the normal direction and designated F _N. If the drive system is controlled in a suitable manner, the elevator car 14 can be moved up or down, as represented by the force vectors F _on and F _ab . In a backpack configuration of the type shown now comes - caused by the weight F _{K of} the loaded or unloaded elevator car 14 - a torque D added to the permanent magnet linear drive system acts as indicated by a double arrow.

Obviously, special measures are necessary to ensure accurate and secure guidance of the elevator car 14 for this backpack configuration. However, such guides would, if following the known approaches, provide further mechanical guide elements either adjacent to the elevator car 14 (for example lateral guide rails 12 as in FIG. 1B) and / or above the elevator car 14 (for example a guide cable 12 'as in FIG. 2A).

According to the invention, a completely different route is taken, as will be described below with reference to the schematic FIGS. 4A and 4B.

Referring now to Figure 4A, there is shown a schematic perspective view of a portion of a manhole back wall 26 having the parts 20, 21 of the direct drive linear solenoid drive system. The stationary part 20 (also called support column) of the drive system is attached to the shaft rear wall 26 and has a longitudinal axis L _y , which extends parallel to the y-direction. In contrast to the previously known stationary parts, at least two inclined interaction surfaces a1, a2 arranged on the stationary part 20 are provided. In addition, the drive system has at least two movable parts 21 (also called units), wherein each one of the movable parts 21 is associated with one of the interaction surfaces a1, a2. Each interaction surface a1, a2 is associated with an interaction length b oriented in the y direction. The interaction length b is the length between a terminal guide point and the center of a movable 21. While repulsive forces occur at the terminal guide point, take place in the center of the movable member 21 attractive forces. The interaction length b is thus the effective length which prevents a tilting movement of the elevator car 24 in the xy plane. The interaction length b extends over a portion of the elevator car 24, it is less than or equal to the height of the elevator car 24. If the drive system is controlled in a suitable manner, the elevator car 24 can be moved up or down, as by the force vectors F _on and F _ab are shown. The ratio of attraction F _N divided by force vectors F _on and F _ab is referred to as force ratio K. The force ratio K is typically in the range of 2 to 20, preferably in the range of 3 to 10.

It can be seen by way of example in FIG. 4B that the elevator car 24 is arranged in a backpack configuration. In order to be able to characterize the elevator car 24, the axes of rotation D _x , D _y and D _z acting in the cabin center of gravity are shown in FIG. 4B. Between the movable parts 21 and the interaction surfaces a1, a2 of the stationary part 20 there are strong attractive forces, which are directed in the normal direction and again denoted by F _N. The distance between the car's center of gravity and the interaction surfaces a1, a2 is referred to as the line of action L _x . For determining the distance, the center connecting end of the interaction surfaces a1, a2 extending in the z direction is used as a reference as shown in FIG. 4B. The line of action L _x is therefore the shortest distance between the car's center of gravity and this center connecting. To optimize the efficiency of the permanent magnet linear drive system, the parts 20, 21 by a small air gap from each other spaced. The air gap is for example 1mm wide. Structurally, the air gap has the advantage that it allows non-contact guiding of each of the movable parts 21 on the corresponding stationary part 20. The vertical movement of the elevator car 24 is thus guided via the permanent magnet linear drive system via the moving parts 21 without contact on the stationary part.

Due to the oblique orientation of the interaction surfaces a1, a2 to each other, according to the invention results in a spatial - ie a 3-dimensional acting guide. Thus, a twisting or tilting of the elevator car 24 about the axes of rotation D _x , D _y and D _{z is} prevented. By this novel constellation especially caused by the backpack constellation torques (torque D in Fig. 3) are collected. In other words, the disadvantage of the eccentric suspension of the elevator cars 24 is compensated by the special design of the permanent magnet linear drive system. The ratio of line of action L _x divided by the interaction length b is referred to as eccentricity L _x / b. The eccentricity is typically 0.1 to 1.6, preferably 0.2 to 0.8.

As used herein, the term permanent magnet linear drive system is used to describe a direct drive system that includes a permanent magnet excited synchronous linear motor. The corresponding surfaces of the stationary part of the permanent magnet linear drive system are referred to as interaction surfaces, since there is an interaction between these surfaces and the movable units of the drive system.

Instead of a linear drive system with at least one permanent magnet, it is also possible to use a linear drive system with at least one layer structure with at least one coil.

The movable part may be designed as a layered structure made by applying various layers to a substrate. The layers can be applied one after the other and optionally structured appropriately. In this way, three-dimensional structures of materials with different properties can be applied to the substrate. Individual layers may consist of an electrically insulating material or comprise regions of an electrically insulating material. The conductor track can be composed of conductor track sections which are each formed in different layers of the layer structure. Individual sections of the conductor track may, for example, cross over in different planes and be separated by an electrically insulating layer in the region of the crossing. Furthermore, it is possible to arrange individual sections of the conductor track in different layers separated by an intermediate layer and to provide an electrically conductive region in the intermediate layer, which establishes an electrical connection between these sections of the conductor track.

Layers of the type mentioned can also be applied on both sides of the substrate and optionally structured. For example, it is provided that a first part of the conductor track on a first surface of the substrate and a second part of the conductor track on a second surface of the substrate Substrate is formed, wherein an electrical connection between the first and the second part is made. This makes it possible to give the track a particularly complex geometric structure.

In a variant of the movable part, for example, at least a portion of the conductor track may have the form of a coil, wherein each coil comprises one or more windings. The coil may be disposed on one side of the substrate, but it may also be composed of various portions of the trace disposed on different sides of the substrate and electrically connected together.

In a further variant of the movable part, a plurality of serially arranged sections of the conductor track can each have the shape of a coil, the coils being designed such that adjacent coils generate magnetic fields with different polarity in the case of a current flow through the conductor track. For example, the track may be arranged such that upon supplying the track with a DC current to a surface of the movable member, a static magnetic field is generated whose polarity is a periodic reversal of polarity along the direction in which the movable member is movable relative to the static member is, has. In this way, a movable part can be formed to provide a large number of magnetic poles. With a suitable arrangement of the conductor track, the area available on the substrate can be used efficiently. This is relevant for optimizing the efficiency of the linear drive system and the accuracy with which the Movement of the movable part relative to the static part during operation of the linear drive system can be controlled.

In the following, further details of the invention are explained.

The two inclined interaction surfaces a1, a2 extend parallel to the longitudinal axis L _y and lie in planes which enclose an angle W greater than 0 ° and less than 180 ° (ie 0 ° <W <180 °). The surface normals of the interaction surfaces a1, a2 are directed toward the elevator car 24.

The magnitude of the angle W is a function of the force ratio K and the eccentricity L _x / b. Taking into account the arbitrarily chosen security condition that only 20% of the attraction is sufficient to stabilize the eccentrically loaded backpack lift, the following dependence results: sin W / 2 = 5 * (L _x / b) / K. Preferably, the angle W is between 20 ° and 160 °. For example, the angle W for an eccentricity of 0.7 and a force ratio K of 4 is about 120 °.

The movable part comprises at least two units 21, which are arranged together on a rear side 27 of the elevator car 24 and positively connected to the elevator car 24 that when driving each of the two units 21 an upward or downward movement along one of the interaction surfaces a1, a2 causes. Thereby, the elevator car 24 can be moved up or down.

Due to the oblique arrangement of the two interaction surfaces a1 and a2, the attractive forces F _{N of} the drive system at least partially compensate each other. This helps to avoid the disadvantage of the very high attractive forces and associated friction losses of previous drive systems with permanent magnet linear drive.

Furthermore, it can be seen in FIG. 4B that the elevator car 24 has on the rear side 27 a cabin frame 25, or an equal acting means, on the one hand the two units 21 are positively mounted, and on the other hand designed for eccentric carrying the elevator car 24 is.

In the exemplary embodiment shown, the elevator installation is located in an elevator shaft, whereby according to the invention only one type of shaft rear wall 26 is required to accommodate the mechanical / technical elements of the elevator installation.

Two plan views of parts of two further embodiments of elevator installations 1 according to the invention are shown in FIGS. 5A and 5B. A rear shaft wall 26 is shown. At or in front of this shaft wall 26, the stationary part 20 of the drive system is arranged. The stationary part 20 has at least two inclined interaction surfaces a1 and a2. While the interaction surfaces a1 and a2 are inclined away from one another in the exemplary embodiment according to FIG. 5A, in the exemplary embodiment according to FIG. 5B they are inclined towards one another. The angle W is about 120 °.

The attractive forces F _{N of} the drive system can be broken down into the force components F _Q (transverse forces) and F _H (holding forces). The two transverse forces of the two units 21 compensate each other, since they are both directed parallel to the z-direction, but pointing in opposite directions. Effectively we carried the elevator car 24 by the holding forces F _H. By this partial compensation of the forces, the otherwise existing friction between the stationary part 20 and the moving parts 21 is significantly reduced.

The stationary part 20 is according to the invention in cross-section perpendicular to the longitudinal axis L _y preferably polygonal and the surface normals of the two interaction surfaces a1, a2 tend away from each other or tend towards each other. Both times they point to the elevator car 24.

Due to the inclined arrangement of the interaction surfaces a1, a2, in particular torques D _{z are} compensated which result from the eccentric suspension of the elevator car 24 resulting from the backpack configuration.

It is caused by the respective attractive forces F _N of the respective interaction surface a1, a2 unit 21 both a Verdrehstabilisierung the elevator car 24 about the axis of rotation D _x , which is perpendicular to the longitudinal axis L _y and perpendicular to the back of the elevator car 24, as well a Verdrehstabilisierung the elevator car 24 causes about a rotational axis D _z , which is perpendicular to the longitudinal axis L _y and parallel to the back of the elevator car 24. By the lateral spacing of the units 21 from each other, a rotation about the y-axis D _{y is} prevented.

According to the invention, therefore, the attractive forces of the permanent magnets of the permanent magnet linear drive system serve for stabilizing the eccentrically arranged elevator car 24 and for spatial stabilization and guidance. By the eccentrically acting weight force F _K , the reaction forces are reduced to support the leadership of the drive system and thereby reduces the frictional forces.

By a variation of the angle W, the compensation of the transverse forces F _Q , as well as the stabilization in the axis of rotation D _z can be defined in the design of an elevator installation or a corresponding permanent magnet linear drive system. The stationary part 20 of the permanent magnet linear drive system is thus used for the spatial guidance of the backpack elevator car 24.

The stationary part 20 has a niche or tray a3 in an upper area. As shown in Figs. 4A and 7A and 7B, the tray a3 is located on the upper end of the stationary part 20. It is at least partially enclosed by the interaction surfaces a1, a2 and can be used for mounting manhole components. Thus, shaft components such as a position sensor, a brake partner of a holding brake or even a form-fitting retaining bolt can be attached here.

Embodiments in which the movable parts 21 of the drive system are fastened in the upper region of the rear of the cabin 27 are particularly advantageous.

The embodiments can be realized with or without further support means for supporting the elevator car 24. Such support means are, for example, steel or aramid ropes or belts which connect the elevator car 24 with a counterweight.

Further advantageous embodiments are shown in FIGS. 7A and 7B. 7A shows an elevator installation 1 with two movable parts 21 arranged one above the other in the y direction per interaction area a, b. Accordingly, the interaction length b extends from the terminal guide point of a first movable part 21 to the center of the second movable part 21 of the same interaction area a1, a2.
7B shows an elevator installation 1 with a main guide in moving parts 21 and an auxiliary guide in at least one guide shoe 22. While each of the moving parts 21 is guided on one of the two obliquely inclined interaction surfaces a, b, the guide shoe 22 is laterally next to the stationary part 20 guided on a guide rail. According to FIG. 7B, a guide shoe 22 is shown on the left and right of the stationary part 20 per interaction surface a, b. Accordingly, the interaction length b extends from the terminal guide point in the guide shoe 22 to the center of the movable part 21 of an interaction surface a1, a2.

According to the invention, the primary part of the drive system can be integrated either in the stationary part 20 or in the moving parts 21. The secondary part of the drive system is then in the other part.

Preferably, the coils S of the electromagnets (as can be seen, for example, in FIG. 8) of the primary part of the Drive system in the stationary part 20 while the permanent magnets of the secondary parts 21 in the moving part of the drive system. But it can also be chosen the reverse arrangement.

But it can also drive systems are used, in which the primary part comprises both coils and permanent magnets.

Further examples of stationary parts 20 of a permanent magnet linear drive system according to the invention are shown in sectional view in FIGS. 6A and 6B.

FIG. 8 shows an emergency guide 29 according to the invention, which sits at the top of the cabin frame 25 in the example shown.

The emergency guide 29 engages at least partially around or behind the stationary part 20, to prevent tilting (about the D _z axis of rotation) of the elevator car 24, if the permanent magnet linear drive system should fail (for example, in the event of a power failure), or by the permanent magnet Linear drive system induced attractions should subside. The emergency guide 29 is designed so that it runs without contact along the stationary part 20 in normal operation. It comes only in case of emergency for mechanical intervention. Preferably, 24 emergency guides 29 are provided at the two upper corners of the elevator cars.

It is regarded as an advantage of the illustrated backpack arrangement with drive system on the cabin frame 25 that the actual elevator car 24 can be isolated from the frame 25 (sound).

The inventive permanent magnet linear drive systems and the corresponding elevator systems are space-saving in the shaft projection.

It is a further advantage that the engine attractive forces are in part compensated by the torque caused by the cabin weight F _K and that the frictionless contact over the air gap results in no friction losses as in conventional arrangements.

It is also advantageous that the use of at least two movable parts 21 provides redundancy in the drive.

The individual elements and aspects of the various embodiments can be combined as desired.

Claims (15)

Elevator installation (1) with an elevator car (24) and a linear drive system with a stationary part (20) whose longitudinal axis (L _y ) is arranged perpendicularly along a shaft wall (26) of the elevator installation (1) and with a movable part which extends moved in the control of the linear drive system along the stationary part (20), characterized in that the elevator car (24) is arranged in a backpack configuration and is movable along the stationary part (20) by the linear drive system, - The stationary part (20) has at least two inclined interaction surfaces (a1, a2), which extend parallel to the longitudinal axis (Ly) and lie in planes which enclose an angle (W) between 0 ° and 180 ° and the surface normal are directed towards the elevator car (24), - The movable part comprises at least two units (21) which are arranged together on a back side (27) of the elevator car (24) and positively connected to the elevator car (24), that when driving each of the two units (21) one Moving along one of the interaction surfaces (a1, a2) causes, so as to move the elevator car (24). Elevator installation (1) according to claim 1, characterized in that the stationary part (20) in cross section perpendicular to the longitudinal axis (L _y ) is polygonal and the surface normals of the two interaction surfaces (a1, a2) are inclined away from each other or towards each other. Elevator installation (1) according to claim 1 or 2, characterized in that between a first of the two interaction surfaces (a1) and a first of the two units (21) there is a first attractive force (F _N ) substantially parallel to the surface normal thereof Interaction surface (a1) runs and that there is a second attraction force (F _N ) between the second of the two interaction surfaces (a2) and the second of the two units (21), which extends substantially parallel to the surface normal of this interaction surface (a2). An elevator installation (1) according to claim 3, characterized in that the first and second attractive forces (F _N ) at least partially oppose each other and therefore the holding forces effectively acting between each of the units (21) and the associated interaction surface (a1, a2) Reduce (F _H ). Lift installation (1) according to claim 1 or 2, characterized in that the inclined arrangement of the interaction surfaces (a1, a2) torques (D _x , D _y , D _z ) compensated, resulting from the resulting from the backpack configuration eccentric suspension of Elevator car (24) result. Elevator installation (1) according to claim 1 or 2, characterized in that the two units (21) are arranged at the same height but spaced apart on the rear side (27) of the elevator car (24) so as to provide torsional stabilization of the elevator car (24 ) to cause an axis (D _y ) which is parallel to the longitudinal axis (L _y ). Lift installation (1) according to claim 1 or 2, characterized in that by the inclined arrangement of the interaction surfaces (a1, a2) and by the corresponding attractive forces of the respective interaction surface (a1, a2) opposite unit (21) both a Verdrehstabilisierung the elevator car ( 24) about an axis (D _x ) is effected, which is perpendicular to the longitudinal axis (L _y ) and perpendicular to the back of the elevator car (24), as well as a torsional stabilization of the elevator car (24) about an axis (D _z ) causes is perpendicular to the longitudinal axis (L _y ) and parallel to the back of the elevator car (24). Elevator installation (1) according to one of the preceding claims, characterized in that the stationary part (20) serves as a spatial guide element for a vertical movement of the elevator car (24) along the shaft wall (26) due to the inclined arrangement of the interaction surfaces (a1, a2) , Elevator installation (1) according to one of the preceding claims, characterized in that the units (21) are separated by an air gap from the stationary part (20) and guide the vertical movement of the elevator car (24) along the shaft wall (26) without contact. Elevator installation (1) according to one of the preceding claims, characterized in that a Guide shoe (22) guides the vertical movement of the elevator car (24) on a guide rail. Elevator installation (1) according to one of the preceding claims, characterized in that an emergency guide (29) is provided in an upper area of the elevator car (24) which engages at least partially around or behind the stationary part (20) to tilt the elevator car (24) should the linear drive system fail, or that the attraction forces caused by the linear drive system should be relieved. Lift installation (1) according to any one of the preceding claims, characterized in that an upper portion of the stationary part (20) has a shelf (a3) for mounting shaft components such as a position sensor, and / or a brake partner of a holding brake and / or a positive locking latch can be used. Lift installation (1) according to one of the preceding claims, characterized in that the linear drive system has at least one permanent magnet or at least one layer structure with at least one coil. Linear drive system for use in an elevator installation (1) with a stationary part (20) whose longitudinal axis (L _y ) is arranged vertically along a shaft wall (26) of the elevator installation (1), and with a movable part (21) which adjoins Control of the Linear drive system along the stationary part (20) moves, characterized in that , - The stationary part (20) has at least two inclined interaction surfaces (a1, a2) which extend parallel to the longitudinal axis (L _y ) and lie in planes which enclose an angle (W) between 0 ° and 180 °, the stationary part (20) is designed for mounting in front of or on a rear wall (26) of a lift shaft or a building wall, the movable part comprises at least two units (21) which can be mounted in a form-fitting manner together on a rear side of the elevator car (24) on a cabin frame (25), wherein the linear drive system is configured to move the elevator car (24) through the units (21) movable along the stationary part (20) when the linear drive system is driven. Linear drive system according to claim, characterized in that the linear drive system comprises at least one permanent magnet or at least one layer structure with at least one coil.

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