Electric Machine Having Optimized Permanent-Magnet Distribution
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United States of America Patent
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Jun 9, 2016
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Dec 10, 2013
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Abstract
An electric machine is provided having at least one first permanent magnet, at least one second permanent magnet, a first region, the temperature of which is in a first temperature range during operation, and a second region, the temperature of which is in a second temperature range during operation. The at least one second permanent magnet has a higher maximum working temperature than the first permanent magnet, wherein the maximum working temperature is below the temperature at which the magnetic field strength of the permanent magnet irreversibly decreases in dependence on temperature and because of a magnetic field applied externally to the permanent magnet from. The first permanent magnet is arranged in the first region and the second permanent magnet is arranged in the second region.
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