Abstract:
An electrical machine, such as an electric motor, dynamo or alternator has a casing (26) with cooling vents (64) enabling cooling fluid (F) to flow into and out of the casing when the rotor (10) of the electrical machine rotates. The rotor (10) may be formed from conductive elements (44) connected together at their outer regions by inter-connecting members (40) which have vanes (68, 70) arranged to direct cooling fluid over the outer regions. Each conductive element (44) is a metal strip (45) with legs (46, 48) bent in opposite directions (D1, D2) relative to the plane of the strip. Portions of the windings (28, 30) of the rotor (10) are spaced apart to allow fluid to flow between the windings to enhance the cooling effect. With a current carrying rotor, the magnetic field intensity across the rotor is varied by varying the axial separation of the rotor and the stator (74, 76).
Abstract:
Vorliegend ist eine elektrische Maschine mit einem Stator (1) und einem beweglich dazu gelagerten Rotor (21) angegeben, wobei der Stator eine Vielzahl von Nuten (2) zur Aufnahme einer Statorwicklung umfasst. In jede Nut ist je genau ein Leiterabschnitt (3) der Statorwicklung eingelegt. Die Leiterabschnitte (3) sind auf einer ersten Seite (5) des Stators miteinander in einem Kurzschlussmittel kurzgeschlossen und mit diesem einstückig hergestellt. Auf einer zweiten Seite (6) des Stators sind die Leiterabschnitte (3) mit je einem Anschluss einer Stromversorgungseinheit (8) verbunden, die entsprechende Phasenströme bereitstellt.
Abstract:
An electronically switched synchronous motor drive designed as a linear or rotary actuator has an actuating element formed by a slidably or rotatively mounted permanent magnet and a stator formed by a winding. The winding is formed by at least one multilayer winding in order to improve its synchronicity. In order to further improve the synchronicity in relation to prior art, a detector generates a position signal which indicates the relative or angular position of the linear or rotative actuator, and, according to the position signal, a triggering device applies to the winding a sinusoidal or multi-stage current in the positive and negative regions, depending on the position detected.
Abstract:
An armature for an electromotive device having a unitary coil and armature is disclosed. The armature may include a coil (12, 12') having inner (12) and outer (12') winding portions separated by an insulator, each of the winding portions (12 and 12') comprising a plurality of sheet metal conductors (12a, 12b and 12'a, 12'b), and a commutator (14a, 14b, 14'a, 14'b) having a plurality of sheet metal commutator segments (14a, 14'a) each being integrally formed with one of the conductors. In one embodiment of the armature, the commutator (14a, 14b, 14'a, 14'b) may have a smaller outside diameter than the outside diameter of the coil (12, 12'). In the same or different embodiment of the armature, the commutator segments (14a, 14b, 14'a, 14'b) may have a width greater than the width of the conductors (12a, 12b and 12'a, 12'b). The armature may be fabricated from a pair of conductive sheets (10, 10') by forming in each of the conductive sheets a plurality of conductive bands each having first and second conductor portions, shaping the conductive sheets into inner and outer cylinders (20, 20'), positioning the inner cylindrical conductive sheet (20) inside the outer cylindrical conductive sheet (20'), forming a coil from the first conductor portions of the inner and outer cylindrical conductive sheets, and forming a commutator from the second conductor portions of the inner and outer cylindrical conductive sheets (20, 20').
Abstract:
A stator core (558) constituting a stationary field system and a stator coil (559) wound around the stator core (558) are disposed on the outer circumference of an armature core (520). An end of this stator coil (559) is disposed on the outer circumference of a planetary gear reduction gear mechanism (300), that is, in a space on the outer circumferential side of a center bracket (360). In addition, a motor bulkhead (800) has a stepped portion (810) for receiving the one end. Furthermore, the other end of the stator coil (559) is disposed in a space on the outer circumferential side of a brush (910). In other words, the outer diameter of the planetary gear reduction gear mechanism (300) is set to be smaller than the inside diameter of the stator coil (559).
Abstract:
A plurality of shaped flat plates with slots and teeth along one edge, capable of coincident superposition. Two such plates in juxtaposition, one inverted can pivot longitudinally to form symmetrical wedge shapes suitable for commutators for use in rotating electrical machines, also capability for integral bar windings by integral extensions of the plates.
Abstract:
A motor includes a shaft, at least one bearing, a rotor, a stator, and a brush carrier. The bearing is located adjacent to the shaft. The rotor is interconnected to the shaft and magnetically interacts with the stator. The brush carrier is releasably interconnected to the rotor and/or stator such that the brush carrier can mechanically disconnect from the rotor and/or stator without disturbing a bearing and other motor elements. By disconnecting the brush carrier from an endbell and viewing the commutator surfaces through an endbell aperture, the commutator surfaces of the motor are inspected. Since more than one winding portion of the armature can act as a commutating surface, motor assembly is simplified and the motor has a long useful life. A motor including more than one brush carrier is also provided. Each brush carrier is releasably interconnected to the rotor and/or stator such that either brush carrier can be mechanically disconnected from the rotor and/or stator without disturbing other motor elements.
Abstract:
Proposed is an electrical machine, in particular an electrical motor, which has a rotor consisting of a hollow cylindrical armature core (11) carrying an armature (13). The stator of the electrical machine has magnet poles (23, 24) staggered by the same rotational angle. Commutation is by means of brushes (29), the armature winding (13) being designed as a commutator coil. The brushes (29) of the brush set are in sliding contact with the armature winding (13). Thus the commutation necessary for a d.c. motor, for instance, can be ensured without a commutator being fitted. The fact that the commutator and the leads connecting it to the armature winding are not necessary makes manufacture of the motor simpler and less expensive. In addition, the motor can be designed so that it is smaller, in particular shorter, and lighter for the same power.
Abstract:
Die Erfindung betrifft einen Flachmotor zum Antrieb eines Verstellsystems eines Kraftfahrzeugs, insbesondere eines Fensterhebers, mit einem Scheibenläufer als Rotor und einem scheibenartigen Spulensystem, gebildet durch Wicklungen elektrischer Leiter, das einen der Kommutierung dienenden Kollektorbereich und einen mit Permanentmagneten des Motors wechselwirkenden Aktivbereich aufweist, wobei die elektrischen Leiter zur Bildung der Wicklungen sich in zwei benachbarten Ebenen erstrecken. Dabei sind die die Wicklungen bildenden elektrischen Leiter als Leiterbahnen (101, 102, 103, 104) ausgebildet, die auf jeweils einer Oberfläche einer Leiterplatte (111, 112, 113) ausgeprägt sind und der Kollektorbereich (14) des Spulensystems wird durch auf genau einer Oberfläche mindestens einer Leiterplatte (111, 112, 113) verlaufende Leiterbahnen (101, 102, 103, 104) gebildet.