Abstract:
An electric machine for direct drive or braking applications with coils providing improved power efficiency and heat transfer is disclosed. The electric machine has a coil body and a winding with a plurality of turns wound on the coil body. Each of the various turns is located in a separate plane. Respective end sections of two different turns are connected by a connecting element, with a major directional component of the connecting element being oriented in an axial direction perpendicular to the plane of one of the two turns. Axially adjacent turns can thereby be connected to one another together. This arrangement reduces or eliminates empty spaces in the slots, particularly when the turns are made from flat wire.
Abstract:
A rotor for a permanent magnet synchronous machine includes a basic body defining a center. Permanent magnets are arranged on a circumferential surface of the basic body to thereby form magnetic poles. Each magnetic pole is formed in a circumferential direction by at least two permanent magnets and defined by a pole center and a pole edge, wherein the pole edge is spaced from the center of the basic body at a distance which is smaller than a distance of the pole center to the center of the basic body. Positioned in sections between the pole centers of adjacent pole are filling elements, with a banding securing the filling elements on the permanent magnets in such a way that the rotor has a substantially cylindrical circumferential surface.
Abstract:
Disclosed is an electric machine (1) comprising a stator (2) that encompasses a winding system (10) with three winding branches, and a certain number of effective pole pairs. Each winding branch is provided with at least one coil group, each of which contains an even number of serially connected individual coils (11) that generate an individual magnetic field, respectively. Two respective individual coils (11) of a coil group are offset relative to each other in a circumferential direction of the stator (2) in such a way that the associated individual magnetic fields are provided with an offset electrical angle relative to one another at the sixth harmonic of the number of effective pole pairs, said offset electrical angle being equal to an odd multiple of 180°.
Abstract:
A dynamo-electrical machine includes a stator with teeth which are aligned with respect to a rotor, wherein at least a predeterminable number of teeth are surrounded by a winding system which is arranged in slots. The slots which are formed by the teeth and designed to be open, are each closed by a slot sealing element which has an electrically non-conductive and magnetically non-permeable material in which a tooth head widening element is provided in the area of those tooth sections of the tooth heads which face the air gap.
Abstract:
The aim of the invention is to provide a linear/rotation drive with an improved transmitter device for detecting the linear and rotational movements. For this purpose, the transmitter device (12, 14, 16, 17) for detecting the linear movement and/or rotational movement of the secondary part (4) of the linear drive (2) configured as an external rotor is at least partially arranged inside the primary part (6) of the linear drive (2). In this manner, the transmitter device (12, 14, 16, 17) is located in a magnetically shielded area. In order to avoid eccentricities in the transmitted device (12, 14, 16, 17), a journal (10) of the secondary part (4) is mounted on a bearing (11) in the primary part (6).
Abstract:
The invention relates to an electrical asynchronous machine comprising a stator and a rotor. The stator has a stator winding system comprising a plurality of toothed coils which are partially arranged in stator grooves. The rotor has a rotor winding system consisting of a plurality of short-circuited electrical lines arranged in the rotor grooves (7). The rotor comprises eleven, thirteen, seventeen or twenty-seven rotor grooves (7). In this way, losses caused by harmonic waves and torque ripple are reduced.
Abstract:
A permanently-excited synchronous machine (51), comprises a stator (53) and a rotor (55), the stator (53) preferably comprising a three-phase alternating current winding and the rotor (55) permanent magnets (57). The stator (53) has 21 grooves (1-21) and the rotor (55) four magnetic poles (39). The grooves of the stator (53) are wound such that a first harmonic is suppressed by a winding pattern and a second harmonic suppressed by magnet geometry.
Abstract:
The aim of the invention is to improve the production, design, and effectiveness of rollers or roller motors. Said aim is achieved by using a plastic support unit for the individual magnets in order to produce a multipole motor that has a small diameter and can be integrated into a roller. Said plastic support unit can be unscrewed after being incorporated into a return tube. Additionally, a roller comprising an integrated roller motor (24) is cooled by means of an external or internal cooling device (25, 26) so as to increase constant torque. Furthermore, in order to reduce the design of rollers which have to be braked as well, a braking device is provided which can be integrated into the roller. And finally, in order to simplify contacting of the stator during the production thereof, a divisible arbor is provided which comprises corresponding contact supports on both parts of the arbor.
Abstract:
A permanent magnet synchronous machine includes a stator, and a rotor which defines with the stator an air gap. The stator includes a plurality of teeth which are disposed in spaced-apart circumferential relationship and separated from one another by a tooth pitch. Each of the teeth has a shaft which terminates in a tooth head adjacent the air gap, with the tooth heads of neighboring teeth being separated from one another by a slot. The tooth heads are constructed to prevent saturation. The rotor has permanent magnets which are aligned in flux concentration direction and arranged to define a pole pitch, wherein a pitch ratio of tooth pitch to pole pitch is ≧2.5.
Abstract:
A permanent magnet synchronous machine includes a stator, and a rotor which defines with the stator an air gap. The stator includes a plurality of teeth which are disposed in spaced-apart circumferential relationship and separated from one another by a tooth pitch. Each of the teeth has a shaft which terminates in a tooth head adjacent the air gap, with the tooth heads of neighboring teeth being separated from one another by a slot. The tooth heads are constructed to prevent saturation. The rotor has permanent magnets which are aligned in flux concentration direction and arranged to define a pole pitch, wherein a pitch ratio of tooth pitch to pole pitch is ≧2.5.