Abstract: A squirrel-cage rotor includes a slot having an outside circumference edge which is near the outer side of the rotor iron core and has a first corner at one end and a second corner at the other end and whose shape expands toward the outer side beyond a first virtual circle that connects the first corner and the second corner and is concentric with the rotor iron core. It also has an inside circumference edge which is near the inner side and has a third corner having a curvature radius smaller than that of the first corner at one end and a fourth corner having a curvature radius smaller than that of the second corner at the other end and whose shape expands toward the outer side beyond a second virtual circle that connects the third corner and the fourth corner and is concentric with the rotor iron core.

Abstract: A squirrel-cage rotor includes a slot having an outside circumference edge which is near the outer side of the rotor iron core and has a first corner at one end and a second corner at the other end and whose shape expands toward the outer side beyond a first virtual circle that connects the first corner and the second corner and is concentric with the rotor iron core. It also has an inside circumference edge which is near the inner side and has a third corner having a curvature radius smaller than that of the first corner at one end and a fourth corner having a curvature radius smaller than that of the second corner at the other end and whose shape expands toward the outer side beyond a second virtual circle that connects the third corner and the fourth corner and is concentric with the rotor iron core.

Abstract: A rotor for an induction motor 300 including end rings having an annular shape, which is provided at an end of a rotor core and is connected to a conductor bar projecting from the end of the rotor core, and first reinforcing members having an annular shape, each of which is provided between the rotor core and the corresponding one of the end rings and is in contact with the corresponding one of the end rings. The first reinforcing members each have an insertion hole formed therein to which the conductor bar projecting from the end of the rotor core is to be inserted.

Abstract: A vehicle lighting unit can be provided to maintain a basic design without design limitation and to show the color change of the reflector in a gradation manner, when the lighting unit is turned off, with a simple configuration. The vehicle lighting unit such as a positioning lamp can include a housing, an outer lens covering the opening section thereof, the outer lens defining a lighting chamber together with the housing; a light source (bulb); and a reflector having a dummy section where light from the light source does not reach, the light source and the reflector being housed in the lighting chamber. In this configuration, a plurality of slit-like holes are formed in the dummy section of the reflector at appropriate intervals in a direction of a vehicle width so as to have a size increased gradually as it is positioned more outward in the vehicle width direction.