Stator core for an electronically commutated direct-current motor and method for producing a stator
A technology of electronic commutation and DC motor, applied in the field of stator core, which can solve the problems of efficiency loss and damage to stator core
Active Publication Date: 2016-03-09
BUHLER MOTOR GMBH
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
High force consumption can lead to damage to the stator core
When using a stator lamination stack, current bridges can be formed, for example, by mechanical deformation, which favors the formation of eddy currents and thus leads to a loss of efficiency
A further disadvantage is that the overlapping segments must be well guided during the pressing process in order to obtain a defined, reproducible final geometry
Method used
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Embodiment Construction
[0017] figure 1 Shown is a conventional internally wound stator core 1' with poles 2' having pole shoes 7', coils 10', wherein here only a part of the coils in slots 12' is shown. The ends of two opposite pole pieces 7' must have a sufficient distance from each other so that there is sufficient space for guiding the coil needle 9'. Due to geometrical conditions, the ideal number of turns cannot be achieved with conventional stator cores.
[0018] on the contrary, figure 2 shows a stator core 1 wound from the inside according to the invention with a plurality of inwardly directed poles 2 having pole shoes 7 at their inner ends and laps at their outer ends. Step 3. As indicated by the spacing arrows, the spacing of the pole pieces 7 relative to Figure 5 Zooming in, however, the spacing is the same as in the figure 1 Approximately as large as in conventional stator cores, because the pole piece spacing must have the same minimum dimension for the introduction of coil pins....
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The invention relates to a stator core (1) for an electronically commutated DC motor comprising an internal rotor, having several radially inwardly directed pole cores (2), which at their periphery are integral with back iron segments (3), and the back iron segments (3) are integral with adjacent back iron segments (3) via webs (4), wherein the back iron segments (3) alternate with the webs (4), and jointly form a seamlessly closed one-piece ring. The problem addressed by the invention is that of ensuring that in case of a stator core of this class, upon a reduction of the stator diameter and reduction of the pole distances after a winding, a clearly defined end position of the adjoining regions can be assumed, and that for this process step, only minimal forces are necessary, in which damage to the stator core is not to be expected, and that at the end of the process only a very small and uniform air gap remains at a lowest possible spring-back. This problem is solved by means of the characteristic of claim 1 and the method steps of claim 7.
Description
technical field [0001] The invention relates to a stator core (1) for an electronically commutated direct current motor with an inner rotor, the stator core having a plurality of radially inwardly directed pole cores (2), the pole cores being connected at their periphery to The overlapping section (3) is integral, and the overlapping section (3) is integrated with the adjacent overlapping section (3) through the coupling part (4), wherein the overlapping section (3) and the coupling part (4) Alternate and together form a seamless, self-closing, one-piece ring. Background technique [0002] A generic stator core is known from DE 10 2010 043 976 A1, in which the overlapping sections are connected to each other by upset areas, which are arranged in mutually opposite overlapping sections within the outer circle described by these overlapping sections. between segments. The described arrangement is intended to provide a stator core whose poles, in particular the pole shoes, hav...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H02K1/14H02K15/095
CPCH02K1/146H02K15/095H02K1/148H02K15/022
Inventor 克劳斯·魏斯克
Owner BUHLER MOTOR GMBH