Permanent magnetic coupling device
AssigneeDelta Electronics (Shanghai) Co., Ltd.
InventorsHong-Liu ZHU, Tsu-Hua AI, Hong-Cheng SHEU
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Abstract
A permanent magnetic coupling device includes an conductor rotor, an permanent magnet rotor and permanent magnets. The permanent magnet rotor includes a magnetic ring. The magnetic ring includes protrusions and recesses arranged alternately, in which first airflow channels are formed between the protrusions and the conductor rotor respectively, and second airflow channels are formed between the recesses and the conductor rotor respectively. A cross-sectional area of each of the second airflow channels is greater than a cross-sectional area of each of the first airflow channels. The permanent magnet rotor further includes cavities disposed at the recesses, and the permanent magnets are engaged into the cavities respectively.
Claims23
A permanent magnetic coupling device, comprising
- a conductor rotor;
- a permanent magnet rotor, comprising:
- a magnetic ring comprising a plurality of protrusions and a plurality of recesses arranged alternately, wherein first airflow channels are formed between the protrusions and the conductor rotor respectively, second airflow channels are formed between the recesses and the conductor rotor respectively, and a cross-sectional area of each of the second airflow channels is greater than a cross-sectional area of each of the first airflow channels;
- and
- a plurality of permanent magnets disposed in a plurality of cavities of the recesses, wherein the permanent magnets are engaged into the cavities respectively.
Dependencies are inferred from the claim text.