Electromagnetic excitation system, electromagnetic brake or clutch, and method for manufacturing electromagnetic excitation system

Abstract

The invention relates to an electromagnetic excitation system (1) for an electromagnetic brake (2) or clutch, comprising an electromagnet (10) and a permanent magnet (40), the electromagnet (10) comprising a pot-shaped and annular housing (20) about a longitudinal axis (L), the housing (20) having an inner ring portion (22), an outer ring portion (24), a bottom portion (26) connecting the inner ring portion (22) and the outer ring portion (24), and an excitation coil (30), an excitation coil (30) is inserted between an inner ring portion (22) and an outer ring portion (24) in a housing (20), a free end of the outer ring portion (24) forms a magnetic pole (15), a permanent magnet (40) is provided on a flange (50) on a side away from the excitation coil (30), and the flange (50) is provided on a side away from a bottom portion (26) of the excitation coil (30) and protrudes from the inner ring portion (22) toward the outer ring portion (24), an air gap (60) is formed between the flange (50) and the outer ring portion (24).

Description

Technical Field

[0001] The present invention relates to an electromagnetic excitation system having the features of claim 1, an electromagnetic brake or clutch having the features of claim 9, and a method for manufacturing an electromagnetic brake having the features of claim 11. Background Technology

[0002] Electromechanical brakes or clutches are known in the prior art in a variety of design ways. In the prior art, electromechanical brakes of the same class are used, for example, as permanent magnet brakes or spring-pressure brakes, and they include an electromagnetic excitation system with an electromagnet that can cooperate with an armature plate to drive the tribological system of the brake or clutch or bring it into a state of frictional contact.

[0003] Typically, an electromagnet comprises a can-shaped or annular housing, which can be arranged around a longitudinal axis and a rotating shaft (such as the shaft of a servo motor). The housing has an inner ring portion and an outer ring portion, and an excitation coil inserted between the inner and outer ring portions within the housing. The free ends of the inner and outer ring portions form the magnetic poles of the electromagnet and friction surfaces; therefore, electromagnetic brakes or clutches are also called pole friction brakes or clutches.

[0004] In existing technology, permanent magnets are also used as reset devices. When the electromagnet is de-energized, for example, a brake is actuated by a permanent magnet to achieve emergency braking in the event of a power outage.

[0005] Documents US 2023 296 140 A1, DE 20 2004 001 042 U1 and DE 199 46 084 A1 form further prior art.

[0006] Such electromagnetic brakes or clutches have been proven in the past; however, known electromagnetic brakes or clutches are relatively long in structure and complex to manufacture. Summary of the Invention

[0007] Therefore, the object of the present invention is to provide a suitably improved electromagnetic excitation system for an electromagnetic brake or clutch, an improved electromagnetic brake or clutch, and a method for manufacturing a suitably improved electromagnetic excitation system, which eliminates the disadvantages known in the prior art.

[0008] These objectives are achieved by an electromagnetic excitation system having the features of claim 1, an electromagnetic brake or clutch having the features of claim 9, and a method of manufacturing an electromagnetic brake having the features of claim 11.

[0009] Improvements to the present invention are specified in the dependent claims.

[0010] The electromagnetic excitation system for an electromagnetic brake or clutch according to the present invention has the features described in claim 1, comprising an electromagnet and a permanent magnet.

[0011] An electromagnet includes a can-shaped and annular housing arranged around a longitudinal axis and an excitation coil. The can-shaped and annular shells have an inner ring portion, an outer ring portion, and a bottom portion connecting the inner ring portion and the outer ring portion; Furthermore, the excitation coil is inserted between the inner and outer ring portions in the housing, and the free end of the outer ring portion forms a magnetic pole; In addition, the permanent magnet is mounted on a flange on the side away from the excitation coil; the flange can be mounted on the side of the excitation coil away from the bottom part and can protrude from the inner ring part to the outer ring part, forming an air gap between the flange and the outer ring part.

[0012] This invention is based on the concept of a particularly compact electromagnetic excitation system. Unlike, for example, in WO 2006 087017 A1, the permanent magnet is not in the form of a sleeve around the longitudinal axis and magnetized radially, but is in the form of a disk or disc ring, and preferably magnetized axially.

[0013] When the electromagnet is not energized, the magnetic lines of force in the flange split into two paths: one path flows through the shell around the excitation coil to form the main magnetic flux, and the other path flows through the air gap to form the secondary magnetic flux. In the outer ring section, the main and secondary magnetic fluxes merge and flow back to the permanent magnet.

[0014] When an electromagnet is energized, the magnetic field of the excitation coil displaces, redirects, or neutralizes the magnetic field of the permanent magnet in the region between the magnetic poles and the armature plate. For example, when an electromagnetic excitation system is used for a brake, energizing the electromagnet can release the brake. This means the brake is open, for example, the motor shaft can rotate again.

[0015] Furthermore, it has been shown that air gaps serve as both magnetic reluctance and auxiliary air gaps in the magnetic circuit of permanent magnets. In particular, when the electromagnet is not energized, the air gap acts as both magnetic reluctance and auxiliary air gaps in the magnetic circuit of the permanent magnet.

[0016] An improved embodiment of the invention provides that the free end of the permanent magnet and / or the inner ring portion is offset rearward along the longitudinal axis within the housing relative to the free end of the outer ring portion or the magnetic pole. In other words, the distance between the permanent magnet and the excitation coil and / or the distance between the free end of the inner ring portion and the excitation coil is less than the distance between the magnetic pole and the excitation coil. These distances are measured along or parallel to the longitudinal axis. Therefore, in the closed state of the brake, the armature plate only contacts the magnetic pole or the free end of the outer ring portion. Thus, the magnetic pole can also be referred to as a single pole.

[0017] Furthermore, it has been proven advantageous to insert the flange into the housing. Preferably, the flange is pressed into the housing and connected to the inner ring portion via a press-fit connection, thereby maintaining a low level of magnetic resistance between the housing and the flange. Moreover, this connection method is inexpensive and, in particular, requires no additional fastening devices. By inserting the flange into the housing, the excitation coil can be arranged within the housing in a manner that prevents loosening and protects it from external influences.

[0018] Alternatively, the flange can be fastened to the housing by adhesive, clamping, welding, brazing, or other fastening methods such as screws or rivets. The flange can also be fixed or arranged on the housing by knurling.

[0019] Furthermore, it has been shown that it is advantageous to use hard ferrite, samarium cobalt magnet, neodymium iron boron magnet, plastic-bonded hard ferrite, or plastic-bonded neodymium iron boron magnet. Such magnets have sufficient strength and have been proven in many applications.

[0020] According to an improved embodiment of the invention, the permanent magnet is fixed to the flange by bonding, spraying, or sintering. Spraying or sintering is particularly advantageous because no additional fastening device is required. For example, plastic-bonded permanent magnets have proven advantageous because they can be easily applied to the flange by spraying without requiring additional fastening devices.

[0021] Furthermore, it has been shown that it is advantageous to integrally mold the housing with the inner ring portion, outer ring portion, and bottom portion. The housing is preferably made of a soft magnetic material that is easily magnetized. Moreover, it has been shown that it is even more advantageous if the flange is also made of a soft magnetic material that is easily magnetized.

[0022] An improved embodiment of the present invention provides that the excitation coil includes a coil carrier and a coil winding. The coil winding is preferably wound on the coil carrier, wherein the coil carrier preferably comprises an electrically insulating material, such as plastic, or is made of an electrically insulating material.

[0023] Furthermore, it has been shown that it is advantageous if the coil carrier has at least one deformable region, which deforms when the excitation coil is inserted into the housing, thereby creating a force-locking connection between the excitation coil and the housing.

[0024] The at least one deformable region may include at least one protrusion or at least one bump.

[0025] The at least one deformable region may in particular include a wavy portion, preferably with a protruding protrusion on the side opposite to the coil winding, wherein when the excitation coil is inserted into the housing, the protrusion is pressed in, causing the coil carrier to deform, thereby creating a force-locked connection between the excitation coil and the housing.

[0026] Another aspect of the present invention relates to an electromagnetic brake or clutch having the above-described electromagnetic excitation system, wherein an armature plate is provided, which works in conjunction with an electromagnet and a permanent magnet and is movable along a longitudinal axis.

[0027] The electromagnetic brake or clutch of the present invention allows for a particularly compact structural design. Unlike, for example, that in WO 2006 087017 A1, the permanent magnet is not arranged in a sleeve shape around the longitudinal axis and magnetized radially, but is arranged in a disk shape on the side away from the excitation coil and magnetized axially.

[0028] When the electromagnet is not energized, the magnetic lines of force in the flange are divided into a main magnetic flux and a secondary magnetic flux passing through the air gap around the excitation coil via the housing. In the outer ring, the main and secondary magnetic fluxes merge, flow together through the magnetic poles into the armature plate, and then flow back to the permanent magnet. Magnetic resistance pulls the armature plate toward the magnetic poles, thereby closing the brake.

[0029] When the electromagnet is energized, a direct current is applied to the excitation coil. The magnetic field of the excitation coil displaces and guides the magnetic field of the permanent magnet in the region between the magnetic poles and the armature plate. Therefore, the brake can be released. This means the brake is open, for example, the motor shaft can rotate again.

[0030] Another aspect of the present invention relates to a method for manufacturing an electromagnetic excitation system for an electromagnetic brake or clutch, particularly for the aforementioned electromagnetic brake or clutch, the system comprising an electromagnet and a permanent magnet, the method comprising the following steps: Provides a can-shaped and annular shell having a longitudinal axis, an inner ring portion, an outer ring portion, and a bottom portion connecting the inner ring portion and the outer ring portion; Provide excitation coils; The excitation coil is inserted between the inner and outer ring portions of the housing to form an electromagnet; A flange is provided, the end face of which is provided with a disc-shaped permanent magnet; and The flange is arranged on the housing so that the permanent magnet is located on the side away from the excitation coil, and the flange protrudes from the inner ring portion to the outer ring portion, forming an air gap between the flange and the outer ring portion.

[0031] A method for manufacturing an electromagnetic excitation system, particularly an electromagnetic brake, is characterized by its ability to produce a particularly compact electromagnetic excitation system for electromagnetic brakes in a simple and low-cost manner. Specifically, this method eliminates the need for additional fastening devices, and all components can be interconnected by force-locking, preferably completed in a single working step.

[0032] According to an improved version of the method of the present invention, in order to provide a flange, permanent magnets are bonded, sintered, or sprayed onto the end face of the flange. For example, multiple permanent magnets may be bonded to the end face, or plastic-bonded magnets may be sprayed onto the end face in the form of a thin layer, wherein the magnetization direction is preferably axial, i.e., occurring along the longitudinal axis.

[0033] The permanent magnet is preferably disc-shaped, and more preferably, the thickness of the permanent magnet in the longitudinal axial direction is less than the thickness of the flange.

[0034] According to the improved design, the permanent magnets are preferably magnetized after they are placed on the end face of the flange.

[0035] An improved embodiment of the present invention connects the flange to the housing. For example, the flange can be fixed to the housing by adhesive, clamping, welding, brazing, or by other fastening devices such as screws, rivets, etc.

[0036] A particularly preferred method is to insert the flange into the housing.

[0037] When the flange is inserted, it is positioned between the inner and outer ring portions within the housing, creating an air gap. During this process, the flange containing the permanent magnet is inserted into the housing until the permanent magnet and / or the free end of the inner ring portion is offset rearward relative to the magnetic poles along the longitudinal axis. In other words, the distance between the permanent magnet and the excitation coil along the longitudinal axis, and / or the distance between one free end of the inner ring portion and the excitation coil, is less than the distance between the magnetic poles and the excitation coil.

[0038] For example, when the electromagnetic excitation system and the armature plate together constitute a brake or clutch, and the armature plate needs to work in conjunction with the electromagnet and the permanent magnet, in the closed state of the brake or clutch, the armature plate only contacts the magnetic pole (i.e., the free end of the outer ring part of the housing) and does not contact the permanent magnet.

[0039] Preferably, the flange is pressed into the housing; more preferably, a press-fit connection is formed between the flange and the housing (especially in the inner ring portion), thereby securing the flange particularly firmly to the housing.

[0040] An improved embodiment of the present invention specifies that, upon insertion of the excitation coil, the excitation coil is force-locked to the housing. For example, the inner ring portion, the outer ring portion, and / or the excitation coil may have suitable surface structures, such as corrugated structures, by means of which the excitation coil can be force-locked into the housing.

[0041] Furthermore, it has proven advantageous that the excitation coil comprises a coil carrier and a coil winding. The coil carrier is preferably made of an electrically insulating material, such as plastic, and the coil winding is arranged on or wound around the coil carrier. Furthermore, preferably, the coil carrier has at least one deformable region that deforms when the excitation coil is inserted into the housing, such that the excitation coil is force-locked into the housing.

[0042] At least one deformable region may include, for example, at least one protrusion or at least one bump protruding on the side away from the coil winding, wherein when the excitation coil is inserted into the housing, the at least one protrusion or at least one bump deforms or is pressed in, causing deformation of the coil carrier, thereby resulting in a force lock between the excitation coil and the housing.

[0043] Furthermore, it is advantageous if a force-locking engagement is generated between the excitation coil and the housing during insertion, more preferably during flange pressing. For example, the excitation coil can be loosely inserted into the housing first. When the flange is pressed in, the flange presses the excitation coil towards the bottom portion, causing the excitation coil or at least one deformable area to deform within the housing, thereby securing the excitation coil in the housing by force-locking. Attached Figure Description

[0044] The embodiments are described in detail below with reference to the accompanying drawings. The drawings show: Figure 1 A cross-sectional view of a ventilated electromagnetic brake with an electromagnetic excitation system and an armature is shown. Figure 2a It shows Figure 1 The electromagnetic excitation system of the electromagnetic brake shown; Figure 2b It shows Figure 2a A detailed schematic diagram of the electromagnetic excitation system is shown. Figure 3 It shows Figure 1 A detailed schematic diagram of the magnetic flux in the ventilated electromagnetic brake shown. Figure 4 A detailed schematic diagram of the magnetic flux in a ventilated electromagnetic brake is shown, and Figure 5 It shows Figure 1-4 The diagram shows a detailed view of the excitation coil of the electromagnetic excitation system before it is installed in the housing. Detailed Implementation

[0045] In the following detailed description of the accompanying drawings, identical or functionally identical parts or features are indicated by the same reference numerals. Similarly, not all identical or functionally identical parts or features in the drawings have reference numerals.

[0046] Figure 1An exemplary embodiment of an electromagnetic brake 2 having an electromagnetic excitation system 1 is shown.

[0047] Figure 1 The electromagnetic excitation system 1 of the electromagnetic brake 2 Figure 2a It is shown in detail in the figure and has an electromagnet 10 and a permanent magnet 40.

[0048] The electromagnet 10 includes a housing 20 formed in a can shape and annular shape around a longitudinal axis L. The housing 20 is preferably substantially rotationally symmetric, wherein the longitudinal axis L forms an axis of symmetry.

[0049] The can-shaped and annular shell 20 may be made of a soft magnetic material and has an inner ring portion 22, an outer ring portion 24 and a bottom portion 26 connecting the inner ring portion 22 and the outer ring portion 24.

[0050] The inner ring portion 22 and the outer ring portion 24 are connected to and extend from the bottom portion 26 at one end, and each has a free end at the other end. In other words, the housing 20 has an axial annular groove for accommodating the excitation coil 30.

[0051] The free end of the outer ring portion 24 forms a magnetic pole 15.

[0052] The excitation coil 30 is inserted into the housing 20, wherein the excitation coil 30 is inserted between the inner ring portion 22 and the outer ring portion 24 in the housing 20, that is, in the axial annular groove.

[0053] The excitation coil 30 includes a coil carrier 32 and a coil winding 34. The coil winding 34 is preferably wound on the coil carrier 32, wherein the coil carrier 32 preferably includes an electrically insulating material, such as plastic, or is made of an electrically insulating material.

[0054] The coil carrier 32 may have at least one deformable region 36, see [link to documentation]. Figure 5 When the excitation coil 30 is installed into the housing 20, the deformation area 36 deforms, thereby creating a force-locked connection between the excitation coil 30 and the housing 20, particularly between the inner ring portion 22 and / or the outer ring portion 24.

[0055] At least one deformable region 36 includes a portion with a wavy cross-section having at least one protruding protrusion 38 or one or more protrusions. When the excitation coil 30 is inserted into the housing 20, the protrusion 38 is pressed in, thereby causing the coil carrier 32 to deform, forming a force-locked connection between the excitation coil 30 and the housing 20.

[0056] Furthermore, the electromagnetic excitation system 1 also includes a flange 50, which is preferably made of a soft magnetic material. A permanent magnet 40 is preferably fixedly arranged on one end of the flange 50. Therefore, the flange 50 and the permanent magnet 40 can be securely connected together to form a single unit.

[0057] The permanent magnet 40 is preferably disc-shaped, more precisely, a ring-shaped disc, such as... Figure 2b As shown, the thickness D1 of the permanent magnet 40 is preferably less than the thickness D2 of the flange 50, and more preferably a smaller multiple thereof.

[0058] The permanent magnet 40 is axially magnetized, which means that the annular disk-shaped permanent magnet 40 is magnetized along its thickness direction and its magnetic poles are located on a flat circular surface.

[0059] The permanent magnet 40 can be a hard ferrite, samarium cobalt magnet, neodymium iron boron magnet, plastic-bonded hard ferrite or plastic-bonded neodymium iron boron magnet, and can be fixed to the flange 50 by bonding, spraying or sintering.

[0060] The flange 50 is inserted into the housing 20, wherein the permanent magnet 40 is located on the side away from the excitation coil 30.

[0061] Specifically, as can be seen from the attached drawings, the flange 50 is located on the side of the excitation coil 30 away from the bottom portion 26 and extends from the inner ring portion 22 to the outer ring portion 24, forming an air gap 60 between the flange 50 and the outer ring portion 24.

[0062] In its simplest form, flange 50 can be press-fitted into housing 20 or onto inner ring portion 22, so that flange 50 is securely connected to inner ring portion 22. Furthermore, this connection exhibits no significant magnetic resistance.

[0063] Alternatively, flange 50 can be fastened to housing 20 by bonding, clamping, welding, brazing, or other fastening methods such as screws or rivets. Flange 50 can also be fixed or installed on housing 20 by knurling.

[0064] The air gap 60 has high magnetic reluctance and can serve as both a magnetic reluctance and an auxiliary air gap in a magnetic system, which will be described later.

[0065] The permanent magnet 40 and the flange 50 are preferably arranged rearward relative to the free end of the outer ring portion 24 or the magnetic pole 15 in the housing 20 along the longitudinal axis L.

[0066] The free end of the inner ring portion 22 can also be offset backward on the longitudinal axis L relative to the free end of the outer ring portion 24 or the magnetic pole 15.

[0067] In other words, such as Figure 2bAs shown, the first distance A1 measured between the permanent magnet 40 and the excitation coil 30 and / or the second distance A2 (not shown) between the free end of the inner ring portion 22 and the excitation coil 30 can be smaller than the third distance A3 between the magnetic pole 15 and the excitation coil 30.

[0068] In addition, such as Figure 1 As shown, the electromagnetic brake 2 also includes an armature plate 70, which works in a known manner in conjunction with the electromagnet 10 and the permanent magnet 40. The armature plate 70 is movable along the longitudinal axis L.

[0069] The armature plate 70 is also disposed on the flange hub 80, wherein the armature plate 70 is connected to the flange hub 80, for example, by a spring device 75, so that the armature plate 70 can move along the longitudinal axis L.

[0070] The flange hub 80 includes a hub portion 82 and a flange portion 84, and can be connected to the motor shaft of a synchronous motor in a known manner, for example.

[0071] Figure 3 and Figure 4 The magnetic system of a permanent magnet brake with electromagnetic excitation system 1 is schematically shown.

[0072] Under the influence of the permanent magnetic field of the permanent magnet 40, the armature plate 70 is pressed onto the magnetic pole 15 by force locking, and the resulting frictional force forms a braking torque.

[0073] In this state, the electromagnet 10 of the electromagnetic excitation system 1 has no current, and the magnetic flux of the permanent magnet 40 is divided into the main magnetic flux H and the secondary magnetic flux N in the flange 50.

[0074] The main magnetic flux H flows from the flange 50 through the housing 20 and around the excitation coil 30, that is, from the inner ring portion 22 through the bottom portion 26 to the outer ring portion 24.

[0075] The secondary magnetic flux N flows through flange 50 and enters the outer ring section 24 via air gap 60.

[0076] In the outer ring section 24, the main magnetic flux H and the secondary magnetic flux N converge and flow together through the magnetic pole 15, the armature plate 70 and the permanent magnet 40.

[0077] Magnetic resistance attracts the armature plate 70 to the magnetic pole 15, thereby closing the electromagnetic brake 2.

[0078] To eliminate the braking effect—that is, to release the electromagnetic brake 2—when a DC voltage is applied to the excitation coil 30, the permanent magnetic field acting on the armature plate 70 is reversed by the electromagnetic field (such as...). Figure 4(As shown) Expulsion, redirection, and neutralization. Subsequently, the electromagnetic brake 2, via the spring device 75, moves the armature plate 70 away from the excitation system 1 along the longitudinal axis L and pulls it toward the flange portion 84 of the flange hub 80, thereby opening the electromagnetic brake 2. Magnetic flux F flows through the housing 20, flange 50, and air gap 60.

[0079] The manufacturing method of the electromagnetic excitation system 1 used for the electromagnetic brake 2 or clutch is particularly simple and low in cost.

[0080] First, a can-shaped and annular housing 20, an excitation coil 30, and a flange 50 with an annular disk-shaped permanent magnet 40 on its end face are provided. Then, the excitation coil 30 is inserted between the inner ring portion 22 and the outer ring portion 24 of the housing 20 to form an electromagnet 10.

[0081] Finally, the flange 50 is arranged on the housing 20 in such a way that the permanent magnet 40 is arranged on the side away from the excitation coil 30, the flange 50 protrudes from the inner ring portion 22 to the outer ring portion 24, and an air gap 60 is formed between the flange 50 and the outer ring portion 24.

[0082] Preferably, before the flange 50 is installed onto the housing 20, the permanent magnet 40 can be bonded, sintered, or sprayed onto the end face of the flange 50. For this purpose, for example, multiple permanent magnets can be bonded to the end face, or plastic-bonded magnets can be sprayed onto the end face in the form of a thin layer, wherein the magnetization direction is axial, i.e., along the longitudinal axis L.

[0083] The arrangement of the flange 50 on the housing 20 can be achieved by pressing the flange 50 into the housing 20, wherein the flange 50 is preferably pressed onto the inner ring portion 22.

[0084] During this process, the flange 50 with permanent magnet 40 is pushed into the housing 20 until the permanent magnet 40 and the flange 50 are offset rearward relative to the magnetic pole 15 on the longitudinal axis L.

[0085] When the excitation coil 30 is inserted, it can be force-locked to the housing 20. For this purpose, for example, when the excitation coil 30 is inserted into the housing 20, the deformation region 36 can deform, wherein this deformation can occur when the flange 50 is pressed in or inserted.

[0086] List of reference numerals 1 Electromagnetic excitation system 2. Brake 10 Electromagnets 15 magnetic poles 20. Housing 22 Inner Ring Section 24 Outer Ring Section 26 Bottom section 30 Excitation Coil 32 Coil Carrier 34 coil windings 36 Deformation Area 38 protrusions 40 permanent magnets 50 flange 60 air gap 70 Armature Plate 75 Spring device 80 flange hub 82 Wheel section 84 Flange section A1 First Distance A2 Second Distance A3 Third Distance F magnetic flux H Main Magnetic Flux L longitudinal axis Nth magnetic flux

Claims

1. An electromagnetic excitation system (1) for an electromagnetic brake (2) or a clutch, comprising an electromagnet (10) and a permanent magnet (40). The electromagnet (10) includes a can-shaped and annular housing (20) around a longitudinal axis (L), the housing (20) having an inner ring portion (22), an outer ring portion (24), a bottom portion (26) connecting the inner ring portion (22) and the outer ring portion (24), and an excitation coil (30). The excitation coil (30) is inserted between the inner ring portion (22) and the outer ring portion (24) in the housing (20), and the free end of the outer ring portion (24) forms a magnetic pole (15). The permanent magnet (40) is disposed on a flange (50) on the side away from the excitation coil (30), and The flange (50) is disposed on the side of the excitation coil (30) away from the bottom portion (26) and extends from the inner ring portion (22) to the outer ring portion (24), forming an air gap (60) between the flange (50) and the outer ring portion (24).

2. The electromagnetic excitation system (1) according to claim 1, characterized in that, The free ends of the permanent magnet (40) and / or the inner ring portion (22) are arranged rearward relative to the magnetic pole (15) on the longitudinal axis (L).

3. The electromagnetic excitation system (1) according to claim 1 or 2, characterized in that, The flange (50) is pressed into the housing (20).

4. The electromagnetic excitation system (1) according to any one of the preceding claims, characterized in that, The permanent magnet (40) is a hard ferrite, a samarium cobalt magnet, a neodymium iron boron magnet, a plastic-bonded hard ferrite, or a plastic-bonded neodymium iron boron magnet.

5. The electromagnetic excitation system (1) according to any one of the preceding claims, characterized in that, The permanent magnet (40) is bonded, sprayed or sintered onto the flange.

6. The electromagnetic excitation system (1) according to any one of the preceding claims, characterized in that, The air gap (60) serves as a magnetic reluctance and auxiliary air gap in the magnetic circuit of the permanent magnet (40).

7. The electromagnetic excitation system (1) according to any one of the preceding claims, characterized in that, The housing (20) is integrally formed with the inner ring portion (22), the outer ring portion (24) and the bottom portion (26).

8. The electromagnetic excitation system (1) according to any one of the preceding claims, characterized in that, The excitation coil (30) includes a coil carrier (32) and a coil winding (34), and the coil carrier (32) has at least one deformable region (36) that deforms when the excitation coil (30) is inserted into the housing (20) to create a force-locked connection between the excitation coil (30) and the housing (20).

9. An electromagnetic brake (2) comprising the electromagnetic excitation system (1) according to any one of the preceding claims, characterized in that, An armature plate (70) is provided, which works in conjunction with the electromagnet (10) and the permanent magnet (40) and can move along the longitudinal axis (L).

10. The electromagnetic brake (2) according to claim 9, characterized in that, The armature plate (70) is mounted on the flange hub (80) in a manner that allows it to move along the longitudinal axis (L).

11. A method for manufacturing an electromagnetic excitation system (1) for an electromagnetic brake (2), particularly an electromagnetic excitation system (1) according to any one of claims 1 to 8 and / or an electromagnetic brake (2) according to any one of claims 9 to 10, comprising the following steps: An electromagnet (10) is provided, having a can-shaped and annular housing (20), the housing (20) having an inner ring portion (22) and an outer ring portion (24) and a bottom portion (26) connecting the inner ring portion (22) and the outer ring portion (24). Provide excitation coil (30); The excitation coil (30) is inserted between the inner ring portion (22) and the outer ring portion (24) in the housing (20); Provide a flange (50) on which a permanent magnet (40) is disposed; and The flange (50) is disposed on the housing (20) such that the permanent magnet (40) is disposed on the side away from the excitation coil (30), and the flange (50) extends from the inner ring portion (22) to the outer ring portion (24), forming an air gap (60) between the flange (50) and the outer ring portion (24).

12. The method according to claim 11, characterized in that, The permanent magnet (40) is fixed to the flange (50) by bonding, spraying or sintering.

13. The method according to claim 11 or 12, characterized in that, The flange (50) is inserted into the housing (20), and in particular, is pressed into the housing (20).

14. The method according to any one of claims 11 to 13, characterized in that, When the excitation coil (30) is inserted into the housing (20), it is arranged in the housing (20) in a force-locking manner.

15. The method according to any one of claims 11 to 14, characterized in that, The excitation coil (30) includes a coil carrier (32) and a coil winding (34), and the coil carrier (32) has at least one deformable region (36) that deforms when the excitation coil (30) is inserted into the housing (20) to force-lock the excitation coil (30) in the housing (20).

Images