Abstract:
The invention relates to a cooling device (1,2) pertaining to an electrical machine (10), said cooling device (1,2) comprising at least one rod-shaped heat-conducting means (3,4) for heat-conductive connection to the electrical machine (10). The invention also relates to an electrical machine (10) comprising a housing (18) and/or a stator (14), said housing (18) and/or stator (14) being applied to a cooling device (1,2) comprising a rod-shaped heat-conducting means (3,4) extending axially in relation to the electrical machine. Said heat-conducting means (3,4) is to be received by the stator (14) and/or the housing (18) or arranged on the stator (14) and/or the housing (18).
Abstract:
A three-phase dynamoelectrical permanently excited synchronous machine includes a stator with teeth which point to a rotor, wherein twelve slots are formed between the teeth. The slots have coil sides of coils of a winding system in such a manner that two coil sides of different coils are situated in each slot. The rotor has a cylindrical support structure which is provided with permanent magnets defined by an inner radius which corresponds to a radius of the support structure, and by an outer radius which is smaller than their inner radius. The permanent magnets are formed with ten magnet poles when viewed in a circumferential direction.
Abstract:
According to the invention, the torque ripple of electrical machines is supposed to be further reduced. For this purpose, it is provided to dispose the magnetic poles, for example, on the surface of a rotor in a plurality of sections (A1, A2) at different angles. The result are helix angles (β1, β2), which have different amounts. Also more than two different helix angles, up to a continuous course of the boundary lines (G4) between the poles, can be implemented.
Abstract:
A magnetic radial bearing and a bearing system for supporting a rotating shaft are disclosed. The bearing has a number of electromagnets circumferentially arranged around a rotating shaft. Each of the electromagnets has a coil which is electrically connected so as to generate both a magnetic bias and a rotating three-phase field. First terminals of opposing coils are connected in common to a corresponding phase of a three-phase controller for generating the rotating field, whereas second terminals of the coils not connected to the same phase are connected at corresponding star points. The star points are connected to DC power for generating the magnetic bias.
Abstract:
In a three-phase permanent-magnet synchronous machine, a pole gap and a skew of permanent magnets on the rotor are designed such that oscillating torques which are caused by the fifth and seventh harmonics of the stator field and of the rotor field are mutually reduced. In particular, the skew can be chosen as a function of the pole gap, such that the majority of the respective oscillating torques is neutralized. This results in minimal torque ripple.
Abstract:
The aim of the invention is to create a combined linear-rotary drive that has a compact, simple, and inexpensive design. Said aim is achieved by a combined drive comprising a linear driving device (3) and a rotary driving device (11), at least one of the two driving devices being provided with a hybrid reluctance motor. It is particularly advantageous to embody both driving devices as hybrid reluctance motors such that the rotor (4) can be produced at a low cost without permanent magnets in addition to ensuring that the drive has a very compact design.
Abstract:
The invention relates to a device for determining the center deviation of a shaft (3) comprising a stator (1) in which an exciting winding system provided with a number of Perr pole pairs is arranged and two output winding systems provided with respective number of Paus pole pairs, wherein the output winding systems are remotely arranged with respect to each other in the stator, the shaft (3) is movably placed in the stator (1) in such a way that it makes it possible to display the shaft center deviation, when ¦ Perr−Paus¦=1, an air gap is situated between the stator (1) and the shaft (3), the device voltage source is arranged for supplying the exciting winding system with an alternating voltage and the device output evaluation system is provided for determining the center deviation according to the voltage induced by the output winding systems.
Abstract:
The aim of the invention is to achieve a high torque yield in synchronous machines excited by permanent magnets. Said aim is achieved by using subharmonic air gap fields. The rotor comprises an induction cage as well as permanent magnets. The number of winding holes of the stator is greater than q=0.5. The number of poles of the rotor is greater than the base number of poles of the air gap field produced by the windings.
Abstract:
Stators for harmonic motors are disclosed. The stators are easy to assemble and include a laminated armature made of sheet metal plates. The laminated armature is formed of a substantially cylindrical laminated star armature with a plurality of radially outwardly oriented pole heads distributed along the circumference of the laminated star armature, and a substantially cylindrical laminated yoke armature having radially inwardly oriented pole teeth and arranged radially outside of and concentrically with the laminated star armature. Each of the pole heads is arranged radially adjacent to a corresponding one of the pole teeth. Windings are applied to the pole teeth before the tooth head sleeve or the laminated star armature are inserted in and joined with th laminated yoke armature.