Abstract:
Die Erfindung betrifft einen Plankommutator (101) aufweisend einen Tragkörper (102) aus einem elektrisch isolierenden Werkstoff, eine Vielzahl von Anschlusssegmenten (108) aus einem elektrisch leitfähigen Werkstoff für den Anschluss von jeweils mindestens einem Ende einer Spulenwicklung, und eine Vielzahl von Laufflächensegmenten (112), welche eine Lauffläche (14) des Plankommutators (101) bilden, wobei die Laufflächensegmente (112) mit den Anschlusssegmenten (108) mechanisch fest und elektrisch leitend verbunden sind, und der Tragkörper (102) und/oder die Anschlusssegmente (108) einstückig ausgebildet sind, und wobei der Tragkörper (102) vorgefertigt ist und Öffnungen (118) aufweist, in welche die Anschlusssegmente (108) eingesteckt sind, dadurch gekennzeichnet, dass der Tragkörper (102) im Bereich der Öffnungen (118) in Bezug auf die eingesteckten Anschlusssegmente (108) mindestens abschnittsweise ein Übermaß aufweist, dass die Anschlusssegmente (108) aufgrund einer Klemmwirkung des Tragkörpers (102) festgelegt sind, und dass die Klemmwirkung durch das mindestens abschnittsweise Übermaß des Tragkörpers (102) in Bezug auf das Anschlusssegment (108) hervorgerufen ist, sowie ein Verfahren zur Herstellung eines Plankommutators.
Abstract:
Die Erfindung betrifft einen Plankommutator (101 ) aufweisend einen Tragkörper (102) aus einem elektrisch isolierenden Werkstoff, eine Vielzahl von Anschlusssegmenten (108) aus einem elektrisch leitfähigen Werkstoff für den Anschluss von jeweils mindestens einem Ende einer Spulenwicklung, und eine Vielzahl von Laufflächensegmenten (112), welche eine Lauffläche (14) des Plankommutators (101 ) bilden, wobei die Laufflächensegmente (112) mit den Anschlusssegmenten (108) mechanisch fest und elektrisch leitend verbunden sind, und der Tragkörper (102) und/oder die Anschlusssegmente (108) einstückig ausgebildet sind, und wobei der Tragkörper (102) vorgefertigt ist und Öffnungen (1 18) aufweist, in welche die Anschlusssegmente (108) eingesteckt sind, dadurch gekennzeichnet, dass die Anschlusssegmente (108) durch die mechanisch feste Verbindung mit den Laufflächensegmenten (112) an dem Tragkörper (102) verankert sind, dass die Öffnungen (118) im Tragkörper (102) im Bereich des den Laufflächensegementen (112) zugewandten Endes der Anschlusssegmente (108) eine Aufweitung (124, 128) aufweisen, dass die Aufweitung (124, 128) der Öffnungen (118) einen Aufnahmeraum für ein Verbindungsmittel zum Verbinden der Anschlusssegmente (108) mit den Laufflächensegmenten (112) bildet, und dass das Verbindungsmittel nach dem Aushärten eine Verankerung des Anschlusssegmentes (108) an dem Tragkörper (102) bildet, sowie ein Verfahren zur Herstellung eines Plankommutators.
Abstract:
Addressed herein are commutators and methods of manufacturing them. The methods permit the carbonaceous material and core of a commutator to be molded simultaneously, rather than in a two-step process, and can eliminate one of two curing procedures used in connection with other manufacturing techniques. The necessity of machining the inner surface of the commutator shell to remove undesired excess phenolic or other material additionally is avoided by use of the techniques detailed herein. Commutators formed according to these methods may have increased useful lives and provide better performance than others presently available. An alternative commutator design addressed herein incorporates a system for anchoring its conductive segments. One or more undercuts in either or both of the metal shell and insulating core of the commutator receive protruding portions of the conductive material to prevent its axial displacement. The metal shell, which for protective purposes may extend above the face of the conductive material during some or all of the manufacturing process, minimizes radial displacement of the segments formed of the conductive material. Differing or non-concentric curvature of the inner surface of the shell and the outer surface of a portion of the insulating core restrict undesired circumferential movement of the segments.
Abstract:
The invention concerns a commutator with segments which have fixation elements on the side remote from the surface in contact with the brushes, the commutator having a rotationally symmetrical body (16) made of insulating material with regularly disposed segment-holding cut-outs (18) whose shape matches that of the fixation elements. The segment-holding cut-outs (18) are sufficiently undersized and the insulating body (16) and/or the segments (10) sufficiently elastic for the segments to be held in the cut-outs (18) both by physical interlocking of the parts and by frictional forces.
Abstract:
A commutator for electrical machines has a segment carrier (1) made of an electrically conductive material and an outer casing (3) with longitudinal grooves (4) in which the segments (7) are inserted. An insulation (5) is placed between the longitudinal grooves (4) and the segments (7), which are fastened mechanically by displacement of material from the outer casing (3) of the segment carrier (1) into longitudinal grooves (11) in the fastening region (9) of the segments (7). Asbestos-free, heat-resistant commutators with high resistance to centrifugal forces are thereby obtained by simple means.
Abstract:
The invention relates to a rotor (4) of a dynamoelectric machine comprises a shaft (5), an essentially cylindrical armature (6), an armature coil (7) comprising aluminum coil wires (11) and a drum commutator (8), which comprises an insulating support body (9) and conductor segments (10) which are attached to said support body (9) and fixed therein by means of armature sections (17). Said conductor segments (10) each comprise a copper running surface area (18) and a connection area (21) made of aluminum or a metal which can be soldered with aluminum (aluminum-compatible metal) having a soldering tag (20) which greatly projects over the brush running surface. Said coil wires (11) are soldered to the end side to the soldering tag (20) of the respectively associated conductor segments (10) and to be precise, without directly contacting the areas of the running surface (18).
Abstract:
What is described is: an electric machine (1), in particular for a motor vehicle, with an electrical contact pair, which comprises a first stationary, substantially fixedly arranged current-transfer apparatus, preferably in the form of brushes (4), and a second current-transfer apparatus arranged so as to enable rotary movement, each of said current-transfer apparatuses having functional faces (9, 49) which come into contact with one another during a rotation of the second apparatus for a sliding contact for current transfer, and the surfaces of the functional faces (9, 49) being formed with a defined roughness (Rh). In order to achieve a longer life of an electric machine, and in a manner which is as inexpensive as possible, the surface at least of one functional face of the first and/or second current-transfer apparatus is formed with local, geometrically defined, regular irregularities (20x) in each case in one dimension greater than the defined roughness (Rh) of the local surface of at least one functional face.
Abstract:
The invention relates to a method of producing a flat commutator with a hub body formed from an insulating molded material, a plurality of conductor segments and a equal number of carbon segments that form the bearing surface. The hub body (9) is formed onto a conductor blank that is provided with radial grooves, said grooves being filled with the molded material. The composite (10) from the conductor blank and the hub body (9) is machined on the face of the conductor blank facing away from the hub body (9). A carbon ring (19) is glued onto the machined front face of the composite (10) and electrically conductive connections to the conductor blank or the conductor segments produced from the conductor blank are produced. The carbon ring (19) is then divided into carbon segments by cutting deeply into the molded material filling the grooves. The conductor blank is divided into the conductor segments either during machining of the front face by opening the radial grooves that are filled with the molded material or later on by separating cuts.
Abstract:
Addressed herein are commutators and methods of manufacturing them. The methods permit the carbonaceous material and core of a commutator to be molded simultaneously, rather than in a two-step process, and can eliminate one of two curing procedures used in connection with other manufacturing techniques. The necessity of machining the inner surface of the commutator shell to remove undesired excess phenolic or other material additionally is avoided by use of the techniques detailed herein. Commutators formed according to these methods may have increased useful lives and provide better performance than others presently available. An alternative commutator design addressed herein incorporates a system for anchoring its conductive segments. One or more undercuts in either or both of the metal shell and insulating core of the commutator receive protruding portions of the conductive material to prevent its axial displacement. The metal shell, which for protective purposes may extend above the face of the conductive material during some or all of the manufacturing process, minimizes radial displacement of the segments formed of the conductive material. Differing or non-concentric curvature of the inner surface of the shell and the outer surface of a portion of the insulating core restrict undesired circumferential movement of the segments.