Electromagnetic arrangement and electric machine having electromagnetic arrangement
An arrangement structure and electromagnetic technology, applied in the direction of magnetic circuit shape/style/structure, electromechanical device, magnetic circuit, etc., can solve problems such as shortening service life, accidents, affecting machine life, etc., to prolong service life and reduce axial load Effect
Pending Publication Date: 2022-04-08
ROBERT BOSCH GMBH
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Problems solved by technology
[0005] However, the axial component F ma is not expected because it will ultimately be applied to the bearing 7 used to rotatably support the motor shaft (see Figure 4 ), so that the service life of the bearing 7 is severely shortened due to the significantly increased axial force
In the permanent magnet synchronous motor, the life of the bearing directly affects the life of the machine, and the failure of the bearing, especially during operation, may cause serious accidents
Method used
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[0037] In order to make the technical problems, technical solutions and beneficial technical effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and multiple exemplary embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, rather than to limit the protection scope of the present invention. In the drawings, the same or similar reference numerals designate the same or equivalent components.
[0038] Figure 4 A schematic block diagram of an electric machine 1 according to an exemplary embodiment of the present invention is shown. like Figure 4 As shown, the motor 1 includes an annular stator 2 , a rotor 3 located inside the stator 2 and rotatable relative to the stator 2 , and a rotating shaft 6 rotatably coupled with the rotor 3 . The stator 2 can generate a stator magnetic field, and the ...
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The invention relates to the field of motors. Specifically, the invention relates to an electromagnetic arrangement having a stator (2) and a rotor (3) that is rotatable relative to the stator (2), where the rotor (3) is located radially inward or radially outward of the stator (2) and at least one of the stator (2) and the rotor (3) has a skewed structure, characterized in that the rotor (3) is arranged radially inward or outward of the stator (2). The electromagnetic arrangement further comprises compensation means for at least partially compensating for a first axial force (Fma) acting on the rotor (3) by a magnetic field caused by the deflection structure. The invention also relates to an electric machine comprising such an electromagnetic arrangement. According to the motor, the additional axial force acting on the motor caused by the skewed slots and / or skewed poles can be obviously reduced, so that the service life of the motor is prolonged.
Description
technical field [0001] The invention relates to an electromagnetic arrangement. The invention also relates to an electrical machine comprising such an electromagnetic arrangement. Background technique [0002] figure 1 A partial perspective view of a conventional stator 100' for a permanent magnet synchronous machine (i.e. PSM) is shown. The stator 100' includes a stator core 103', and the stator core 103' is provided with a straight slot 101' parallel to the axial direction of the motor. The wires 102' used to form the stator windings are placed in the straight slots 101'. [0003] In such a permanent magnet synchronous motor, the existence of the straight slot 101' and the tooth portion 104' between the straight slots will cause cogging torque to cause undesired torque fluctuations. In order to overcome this problem, the means commonly used at present is to adopt a skewed structure on the stator and / or rotor, that is, to adopt a skewed pole (not shown) on the rotor and...
Claims
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IPC IPC(8): H02K7/12H02K1/16H02K1/276H02K1/278
Inventor 孙阿芳刘新华
Owner ROBERT BOSCH GMBH