INDUCTION MACHINE

• Main Authors: KUNIHIRO NAOKI, NISHIHAMA KAZUO, SAWAHATA KIMINORI, IIZUKA MOTONOBU, SUGIMOTO KENICHI, KOMURA AKIYOSHI
• Format: Patent
• Language: English
• Published: 22.09.2014
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERATION

PROBLEM TO BE SOLVED: To provide an induction machine which improves efficiency while increasing a power factor by increasing a leakage magnetic flux of a higher harmonic wave while reducing a leakage magnetic flux of a main magnetic flux.SOLUTION: The induction machine comprises a squirrel-cage rotor including: a rotor core; a plurality of rotor slots disposed at intervals in a circumferential direction at an outer circumferential side of the rotor core and formed continuously in an axial direction; a plurality of rotor bars inserted into the plurality of rotor slots; and a plurality of rotor slits continued to the plurality of rotor slots and positioned closer to an outer circumference of the rotor core than the plurality of rotor slots. The rotor slit is formed from a cavity, a circumferential width of the rotor slit on an inner peripheral surface is larger than a circumferential width of the rotor slit on an outer circumferential surface and smaller than a circumferential width of the rotor bar on an outer circumferential surface, and the circumferential width of the rotor slit has a region which is widened from the outer circumferential surface to the inner circumferential surface.