Rotor for a line start permanent magnet machine

Patent · Tue Jul 11 04:00:00 EDT 2017

OSTI ID:1369046

Melfi, Mike; Schiferl, Rich; Umans, Stephen

A rotor comprises laminations with a plurality of rotor bar slots with an asymmetric arrangement about the rotor. The laminations also have magnet slots equiangularly spaced about the rotor. The magnet slots extend near to the rotor outer diameter and have permanent magnets disposed in the magnet slots creating magnetic poles. The magnet slots may be formed longer than the permanent magnets disposed in the magnets slots and define one or more magnet slot apertures. The permanent magnets define a number of poles and a pole pitch. The rotor bar slots are spaced from adjacent magnet slots by a distance that is at least 4% of the pole pitch. Conductive material is disposed in the rotor bar slots, and in some embodiments, may be disposed in the magnet slot apertures.

• Research Organization: BALDOR ELECTRIC COMPANY, Forth Smith, AR (United States)
• Sponsoring Organization: USDOE
• Assignee: BALDOR ELECTRIC COMPANY
• Patent Number(s): 9,705,388
• Application Number: 13/329,814
• OSTI ID: 1369046
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING