Increasing the air-gap magnetic flux density to generate a higher torque in permanent magnet synchronous machines
Pokharel, Bikarna (2017)
Diplomityö
Pokharel, Bikarna
2017
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe201703162310
https://urn.fi/URN:NBN:fi-fe201703162310
Tiivistelmä
The main objective of this thesis is to investigate the air-gap magnetic flux density and the torque output of a permanent magnet synchronous motor with embedded magnet rotors.
In the beginning, variation of the air-gap magnetic flux density as a function of the magnet height has been investigated. Later, two rotor geometries have been investigated. One of the rotors has a dove-tail-shaped arrangement of magnets while the other has a U-shaped arrangement of magnets. The U-shaped magnets are oriented such that a Halbach array could be produced.
Two-dimensional Finite Element Analysis was employed in the rotor geometry analysis. The results of variation in the height of magnet suggest that air-gap magnetic flux density saturates after certain height of the magnet. Similarly, the results show that the embedded magnets in the rotor with Halbach array orientation could produce a higher air-gap magnetic flux density in comparison to the embedded magnets in the rotor with only radial orientation of magnets.
In the beginning, variation of the air-gap magnetic flux density as a function of the magnet height has been investigated. Later, two rotor geometries have been investigated. One of the rotors has a dove-tail-shaped arrangement of magnets while the other has a U-shaped arrangement of magnets. The U-shaped magnets are oriented such that a Halbach array could be produced.
Two-dimensional Finite Element Analysis was employed in the rotor geometry analysis. The results of variation in the height of magnet suggest that air-gap magnetic flux density saturates after certain height of the magnet. Similarly, the results show that the embedded magnets in the rotor with Halbach array orientation could produce a higher air-gap magnetic flux density in comparison to the embedded magnets in the rotor with only radial orientation of magnets.
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