ELECTRICAL MACHINE WITH PERMANENT MAGNETS
1 Assignment
0 Petitions
Accused Products
Abstract
Electrical machine (1) having a stator (3), which has axially extending cooling channels (8) in the laminate stack and/or cooling channels (9) extending between the stator and a housing, having a rotor (20), whose laminate stack (19) has an internal bore or is positioned on a hub structure (7) having an internal bore, wherein permanent magnets (14) are arranged in or on the laminate stack (19) of the rotor (20), wherein at least one axial-flow fan (4) is provided in the internal bore of the rotor (20), the air flow produced by said axial-flow fan, once it has passed through the rotor (20), by means of flowing through a suitable apparatus (13) achieves a nozzle effect which, owing to the venturi effect, brings about an air flow through the cooling channels (8) arranged in the stator (3). The remanence of the permanent magnets (14) is therefore positively influenced.
30 Citations
16 Claims
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1-6. -6. (canceled)
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7. An electrical machine, comprising:
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a housing; a stator accommodated in the housing and having a laminated core, said stator having at least one of axial cooling channels in the laminated core and cooling channels between the stator and the housing; a rotor including a laminated core and having an internal bore; permanent magnets arranged in or on the laminated core of the rotor; at least one axial fan provided in the internal bore in the rotor and producing an air flow for passage through the rotor; and means for producing a nozzle effect as the air flow passes there through, resulting in a venturi effect to cause air to flow in the cooling channels. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification