Stator core for an electronically commutated direct current motor and method of manufacturing the stator
An electronic commutation, DC motor technology, applied in the field of stator cores, can solve problems such as damage to the stator core and loss of efficiency
Inactive Publication Date: 2018-03-16
BUHLER MOTOR GMBH
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- Summary
- 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 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 The connecting section (3) is integrated, 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. In a generic stator core, the object of the invention is to achieve a well-defined final position of the adjacent regions after winding with a reduced stator diameter and reduced pole spacing, for which process steps only Low forces are required, wherein no damage to the stator core is to be considered, and at the end of the process only small and uniform air gaps remain with as little springback as possible. This object is achieved by the characterizing parts 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 overlapping sections are connected to each other by upset areas which are arranged inside the outer circle described by these overlapping sections. Between overlapping segments facing each other. The described arrangement is intended to provide a stator core whose poles, in particular the pole shoes, have an increased di...
Claims
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IPC IPC(8): H02K1/14H02K15/095
CPCH02K1/146H02K15/095H02K1/148H02K15/022
Inventor 克劳斯·魏斯克
Owner BUHLER MOTOR GMBH