Stator of a claw-pole motor
A claw-pole motor and stator technology, which is applied in the stator field of claw-pole motors, can solve problems such as reducing efficiency and achieve the effect of improving efficiency
Inactive Publication Date: 2014-04-16
BUHLER MOTOR GMBH
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Problems solved by technology
Known magnetic return consists of only curved slats, so eddy currents in the magnetic return reduce efficiency
Method used
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[0023] Figure 1a Shows a first embodiment of the magnetic return ring 13 with a first plate ring 14 , a second plate ring 15 coaxially connected to the first plate ring 14 , the first of the first plate rings 14 The gap 17, the second gap 18 in the second plate ring 15, the notch 16 following the second gap 18 of the second plate ring 15 with the tongue plate 12 left, the first gap 16 between the two plate rings 14, 15 The connection location 19 and the second connection location 20, wherein the first connection location 19 is formed by two beading beads, and the second connection location 20 is formed by two weld seams 21a. These welds are laser welds. In the example shown, the two connection points are approximately 180 degrees away from each other.
[0024] Figure 1b show the basis Figure 1a A simplified top view of the welded magnetic circuit return ring of , with a first plate ring 14, a second plate ring 15, a tongue plate 12, a notch 16, a second gap 18, and a weld...
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The invention relates to a stator of a claw-pole motor, in particular for driving a centrifugal pump, consisting of stator laminations in the form of annular discs with claw poles adjoining said stator laminations, which claw poles are arranged opposite permanent-magnet poles of a rotor, a ring-shaped winding and an insulating body, which is arranged between the stator laminations and the winding, and a magnetic return path ring, which is arranged radially around the winding and the stator laminations and bears fixedly against the stator laminations. The object of the present invention is to ensure a high degree of efficiency and a stable, play-free design of the stator in the case of a centrifugal pump of the generic type, with the result that no vibrations, noises or resonances occur, wherein the design is simple and the production is reliable and economical. This object is achieved according to the invention by the magnetic return path ring (13) comprising at least two lamination rings (14, 15), which are nested coaxially one inside the other and each have at least one cutout (17, 18), and being the cutouts (17, 18) are offset with respect to one another through an angle such that said cutouts do not overlap one another, wherein the two cutouts (17, 18) define two angular ranges a1, a2, the lamination rings (14, 15) are connected fixedly to one another at a first connection point (19), which is removed from the cutouts (17, 18), in the angular range a1 and likwise at another second connection point (20), which is removed from the cutouts (17, 18), in the angular range a2.
Description
technical field [0001] The invention relates to a stator of a claw pole motor, especially for driving a centrifugal pump, the stator is composed of an annular sheet-shaped stator plate with claw poles attached thereto, an annular winding and a body of insulating material and radially surrounding the winding and the stator The magnetic circuit return ring arranged by the plate is composed of the claw poles arranged opposite to the permanent magnetic poles of the rotor, the insulating material body is arranged between the stator plate and the winding, and the magnetic circuit return ring is firmly attached to the stator plate. Background technique [0002] A stator is known from DE 10 2006 021 242, in which a magnetic circuit return ring with a large diameter is attached to the stator, and the magnetic circuit return ring is reduced in diameter by a forming process and thus fastened to the stator. However, the firmness of the connection is not optimal due to the inevitable spr...
Claims
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IPC IPC(8): H02K1/14
CPCH02K5/24H02K1/06H02K5/04H02K1/145H02K15/022
Inventor 奥莱·伊勒克劳斯·魏斯克
Owner BUHLER MOTOR GMBH