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CN-121993518-A - Electromagnetic excitation system, electromagnetic brake or clutch, and method for manufacturing electromagnetic excitation system

CN121993518ACN 121993518 ACN121993518 ACN 121993518ACN-121993518-A

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), wherein the electromagnet (10) comprises a housing (20) in the shape of a pot and ring 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), wherein the excitation coil (30) is inserted between the inner ring portion (22) and the outer ring portion (24) in the housing (20), the free end of the outer ring portion (24) forms a magnetic pole (15), the permanent magnet (40) is arranged on a flange (50) on the side facing away from the excitation coil (30), and the flange (50) is arranged on the side of the excitation coil (30) facing away from the bottom portion (26) and protrudes from the inner ring portion (22) towards the outer ring portion (24), an air gap (60) being formed between the flange (50) and the outer ring portion (24).

Inventors

  • Joachim Haberlich
  • Salvatore Quatarot Inner

Assignees

  • 康德瑞恩(菲林根)有限公司

Dates

Publication Date
20260508
Application Date
20251028
Priority Date
20241107

Claims (15)

  1. 1. An electromagnetic excitation system (1) for an electromagnetic brake (2) or clutch, comprising an electromagnet (10) and a permanent magnet (40); The electromagnet (10) comprises a housing (20) in the shape of a pot and ring 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); the exciting coil (30) is interposed between the inner ring portion (22) and the outer ring portion (24) in the housing (20), and a free end of the outer ring portion (24) forms a magnetic pole (15); the permanent magnet (40) is arranged on a flange (50) at a side far from the exciting coil (30), and The flange (50) is disposed on a side of the field coil (30) remote 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. 2. Electromagnetic excitation system (1) according to claim 1, characterized in that, The permanent magnets (40) and/or the free ends of the inner ring portion (22) are arranged offset back on the longitudinal axis (L) with respect to the poles (15).
  3. 3. Electromagnetic excitation system (1) according to claim 1 or 2, characterized in that, The flange (50) is pressed into the housing (20).
  4. 4. Electromagnetic excitation system (1) according to any 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. 5. Electromagnetic excitation system (1) according to any of the preceding claims, characterized in that, The permanent magnet (40) is glued, sprayed or sintered onto the flange.
  6. 6. Electromagnetic excitation system (1) according to any of the preceding claims, characterized in that, The air gap (60) acts as a reluctance and auxiliary air gap in the magnetic circuit of the permanent magnet (40).
  7. 7. Electromagnetic excitation system (1) according to any 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. 8. Electromagnetic excitation system (1) according to any of the preceding claims, characterized in that, The field coil (30) comprises a coil carrier (32) and a coil winding (34), and the coil carrier (32) has at least one deformation region (36), the deformation region (36) being deformed when the field coil (30) is inserted into the housing (20) in order to produce a force-locking connection between the field coil (30) and the housing (20).
  9. 9. An electromagnetic brake (2) having an electromagnetic excitation system (1) as claimed in any one of the preceding claims, characterized in that, An armature plate (70) is provided, which armature plate (70) cooperates with the electromagnet (10) and the permanent magnet (40) and is movable along the longitudinal axis (L).
  10. 10. Electromagnetic brake (2) according to claim 9, characterized in that, The armature plate (70) is arranged on a flange hub (80) in a manner that it can move along the longitudinal axis (L).
  11. 11. Method for manufacturing an electromagnetic excitation system (1) for an electromagnetic brake (2), in particular 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 steps of: -providing an electromagnet (10) having a pot-shaped and ring-shaped housing (20), said housing (20) having an inner ring portion (22) and an outer ring portion (24) and a bottom portion (26) connecting said inner ring portion (22) and said outer ring portion (24); providing an excitation coil (30); Inserting the exciting coil (30) between the inner ring portion (22) and the outer ring portion (24) in the housing (20); Providing a flange (50), the flange (50) being provided with a permanent magnet (40), and The flange (50) is arranged on the housing (20) such that the permanent magnet (40) is arranged on a side remote from the field coil (30) and the flange (50) extends from the inner ring portion (22) to the outer ring portion (24), an air gap (60) being formed between the flange (50) and the outer ring portion (24).
  12. 12. The method of claim 11, wherein the step of determining the position of the probe is performed, The permanent magnet (40) is fixed to the flange (50) by means of bonding, spraying or sintering.
  13. 13. The method according to claim 11 or 12, wherein, The flange (50) is inserted into the housing (20), in particular pressed into the housing (20).
  14. 14. The method according to any one of claims 11 to 13, wherein, The excitation coil (30) is arranged in the housing (20) in a force-locking manner when inserted into the housing (20).
  15. 15. The method according to any one of claims 11 to 14, wherein, The exciter coil (30) comprises a coil carrier (32) and a coil winding (34), and the coil carrier (32) has at least one deformation region (36), the deformation region (36) deforming upon insertion of the exciter coil (30) into the housing (20) in order to arrange the exciter coil (30) in a force-locking manner in the housing (20).

Description

Electromagnetic excitation system, electromagnetic brake or clutch, and method for manufacturing electromagnetic excitation system Technical Field The present invention relates to an electromagnetic excitation system having the features of patent claim 1, an electromagnetic brake or clutch having the features of patent claim 9, and a method of manufacturing an electromagnetic brake having the features of patent claim 11. Background Electromechanical brakes or clutches are known in the art in a variety of designs. In the prior art, electromechanical brakes of the same type are used, for example, as permanent magnet brakes or spring pressure brakes, and comprise an electromagnetic excitation system with an electromagnet which can cooperate with an armature plate to drive the tribological system of the brake or clutch or bring it into frictional contact. Typically, the electromagnet comprises a pot-shaped and ring-shaped housing, which can be arranged around a longitudinal axis and a rotation axis (e.g. the rotation axis of a servo motor). The housing has an inner ring portion and an outer ring portion, and an exciting coil is inserted into the housing between the inner ring portion and the outer ring portion. The free ends of the inner and outer ring portions form the poles of the electromagnet and the friction surfaces, so the electromechanical brake or clutch is also referred to as a pole friction brake or clutch. In the prior art, permanent magnets are also used as resetting means. In the de-energized state of the electromagnet, for example, the brake is actuated by a permanent magnet in order to achieve emergency braking in the event of a de-energized state. Further prior art is formed by documents US 2023 296 A1, DE 20 2004 001 042 U1 and DE 199 46 084 A1. Such electromagnetic brakes or clutches have been validated in the past, however, known electromagnetic brakes or clutches are relatively long in terms of structural length and complex in the manufacturing process. Disclosure of Invention It is therefore an object of the present invention to propose an appropriately improved electromagnetic excitation system for an electromagnetic brake or clutch, an improved electromagnetic brake or clutch and a method for manufacturing an appropriately improved electromagnetic excitation system which obviate the disadvantages known in the prior art. These objects are achieved by an electromagnetic excitation system having the features of patent claim 1, an electromagnetic brake or clutch having the features of patent claim 9, and a method for manufacturing an electromagnetic brake having the features of patent claim 11. The improvements of the invention are specified in the dependent claims. An electromagnetic excitation system for an electromagnetic brake or clutch according to the invention has the features of claim 1, comprising an electromagnet and a permanent magnet. The electromagnet comprises a shell which is arranged around a longitudinal axis and takes the shape of a pot and a ring, and an excitation coil; The pot-shaped and annular housing has an inner ring portion, an outer ring portion, and a bottom portion connecting the inner ring portion and the outer ring portion; further, the exciting coil is interposed between the inner ring portion and the outer ring portion in the housing, and the free end of the outer ring portion forms a magnetic pole; further, the permanent magnet may be provided on a flange on a side away from the exciting coil, and the flange may be provided on a side of the exciting coil away from the bottom portion, and may protrude from the inner ring portion toward the outer ring portion, forming an air gap between the flange and the outer ring portion. The invention is based on the idea of proposing an electromagnetic excitation system of particularly compact construction. Unlike for example in WO 2006 087 017 A1, the permanent magnets are not sleeve-shaped and magnetized radially about the longitudinal axis, but rather are disk-shaped or disk-ring-shaped and preferably magnetized axially. When the electromagnet is not electrified, the magnetic force lines in the flange are divided into two paths, wherein one path forms main magnetic flux through the shell around the exciting coil, and the other path forms secondary magnetic flux through the air gap. In the outer ring portion, the primary magnetic flux and the secondary magnetic flux are merged and flow back to the permanent magnet. In the energized state of the electromagnet, the magnetic field of the excitation coil displaces, diverts or neutralizes the magnetic field of the permanent magnet in the region of the magnet pole and the armature plate. For example, when an electromagnetic excitation system is used for a brake, the brake can be released by energizing the electromagnet. This means that the brake is opened, for example, the motor shaft can be rotated again. Furthermore, it has proven to be advantageous when the air gap acts as