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US 9,866,082 B2Granted
Rotor and a motor and compressor comprising the rotor
AssigneeEmerson Electric Co.
InventorsPingshan Cao, Xin Li, Xin Li, Yan Zhuang
Life of this patent
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AssigneeEmerson Electric Co.
InventorsPingshan Cao, Xin Li, Xin Li, Yan Zhuang
Estimating the term…
The invention relates to a rotor and a motor and compressor comprising the rotor. The rotor comprises a rotor core defining an outer periphery, a bore concentric with a center of the rotor core, a plurality of magnet slots positioned on the outer periphery, and a plurality of oil holes located radially outward from the center between the bore and the magnet slots. Each oil hole includes a body portion and at least one projected portion. The projected portions are located radially outward from the body portions and positioned between the body portions and the magnet slots. The projected portions may increase the contact area of the compressor oil with the rotor core to effectively cool down the rotor core. Another advantage of the projected portions may be to further cool down the magnets in the magnet slots. Cooling the magnets may protect against their demagnetization.
A rotor comprising, a rotor core defining i) an outer periphery extending between opposing surfaces of the rotor core, ii) a bore concentric with a center axis of the rotor core, iii) a plurality of magnet slots positioned on the outer periphery, and iv) a plurality of oil holes configured to receive oil, the plurality of magnet slots each including a midpoint located on a diameter drawn through a center of a cross section taken orthogonal to the center axis of the rotor core, the plurality of oil holes located radially outward from the center between the bore and the magnet slots, each oil hole including a body portion and at least one projected portion having a pinnacle portion with a peak located on the diameter and extending to the midpoint of one of the magnet slots, the body portion and the at least one projected portion of said each oil hole extending from one of the opposing surfaces of the rotor core to the other opposing surface of the rotor core, the at least one projected portion of said each oil hole located radially outward from the body portion and positioned between the body portion and the magnet slots, the entirety of the at least one projected portion of one of the plurality of oil holes extending from the body portion of said one of the plurality of oil holes to a magnet slot of the plurality of magnet slots to allow the body portion and the at least one projected portion of said one of the plurality of oil holes and the magnet slot to form an integral oil hole.
Dependencies are inferred from the claim text.