Electric machine with improved short-circuit resistance

2015 
An electrical machine (1) in comprises a first and a second active portion (2, 3). In the first active part (2), a winding system (11) is introduced. The second active part (3) has recesses (8), in each of which a permanent magnet (9) is arranged. The winding system (11) interacts electromagnetically with the permanent magnets (9) for generating an electromotive force. The permanent magnets (9) each have a first part magnet (17) facing in a first active part (2) the outer region of the respective recess (8) is arranged. The permanent magnets (9) further each comprise at least one second part magnet (18) facing away from a first active part (2) the inner area of ​​the respective recess (8) is arranged. The first sub-magnets (17) consist of a first magnetic material (M1), the second part of magnets (18) of a second magnetic material (M2). The first magnetic material (M1) comprises at temperatures between 20 ° C and at least 100 ° C, a higher coercive force (Hc) than the second magnetic material (M2).
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