Various embodiments include a squirrel-cage rotor for an asynchronous machine comprising: a first shaft journal; a second shaft journal; a laminated rotor core; and a filler body cast onto the laminated rotor core connecting the filler body and the laminated rotor core in a rotationally fixed manner. The filler body is connected to the shaft journals in a rotationally fixed manner and a torque applied to the shaft journals is transmitted to the laminated rotor core.

A rotor fabrication method is provided. The rotor uses pre-fabricated conductive rotor bars in which the ends have been shaped and sized to fit within corresponding end cap receptacles. After assembly, the structure is compressed, thereby achieving mechanical and electrical coupling between the conductive rotor bars and the end caps. Locking members disposed at either end of the assembly maintain the desired level of axial compressive force on the structure.

The invention relates to an electric machine (10) comprising a stator (11) which comprises a plurality of slots (14) and is adjacent to an air gap (17). The electric machine (10) further comprises a first material (15) having a first electrical conductivity, wherein the first material (15) in each case fills the slots (14) partially, and a second material (16) having a second electrical conductivity that is lower than the first electrical conductivity. The second material (16) exclusively fills an edge region (20) of the slots (14) and the edge region (20) is located in the slots (14) on the side facing the air gap (17). The first material (15) in the slots (14) is electrically conductively interconnected on a first side of the stator (11). The invention furthermore provides an electric machine (10) having a rotor (12).

The invention relates to a squirrel-cage rotor (1) having a shaft (2), a rotor plate stack (3) with rotor bars (4) arranged in the interior thereof, and cage rings (5), wherein at least one part of a cage ring (5) is comprised of a disk stack (7), which is constituted as a layered structure of disks (6) with cut-outs (63), through which the ends of the rotor bars (4) project out of the rotor plate stack (3). Adjoining disks (6) in the disk stack (7) are mutually spaced, and form a gap. The clearance between two adjoining disks (6), resulting from the gap, is constituted by moldings (61) which are arranged on the disks (6) wherein, in the gap (8), at least in the region of the moldings (61), a joint connection (9) is provided. The invention further relates to a method for producing a squirrel-cage rotor.

There is provided a rotary electric machine that ensures improving a maximum torque and a rated power factor while reducing an increase in a starting current. In view of this, the rotary electric machine includes a shaft, a rotor, and a stator. The rotor is fixed to an outer periphery of the shaft. The stator is located so as to surround an outer periphery of the rotor. The rotor includes a rotor iron core including a plurality of rotor slots located at predetermined intervals in a circumferential direction and rotor bars inserted into the rotor slots. Rotor slits communicate with outer peripheral sides of the rotor slots. The rotor slits have a width ws in a circumferential direction. The width ws is smaller than a height hs in a radial direction of the rotor slit, and when a rated current is denoted as I1, a turn ratio (primary/secondary) is denoted as Tr, and a magnetic permeability in a vacuum is denoted as ?.sub.0, a relationship of ws>?.sub.0?I1?Tr/0.6 is met.

There is provided a rotary electric machine that ensures improving a maximum torque and a rated power factor while reducing an increase in a starting current. In view of this, the rotary electric machine includes a shaft, a rotor, and a stator. The rotor is fixed to an outer periphery of the shaft. The stator is located so as to surround an outer periphery of the rotor. The rotor includes a rotor iron core including a plurality of rotor slots located at predetermined intervals in a circumferential direction and rotor bars inserted into the rotor slots. Rotor slits communicate with outer peripheral sides of the rotor slots. The rotor slits have a width ws in a circumferential direction. The width ws is smaller than a height hs in a radial direction of the rotor slit, and when a rated current is denoted as I1, a turn ratio (primary/secondary) is denoted as Tr, and a magnetic permeability in a vacuum is denoted as ?.sub.0, a relationship of ws>?.sub.0?I1?Tr/0.6 is met.

The present disclosure provides a rotor mechanism includes a rotor core and a plurality of rotor bars. The rotor core has a plurality of insertion slots arranged along an edge of the rotor core. Each of the plurality of rotor bars has an insertion portion and two protruding portions. The insertion portions are respectively located in the plurality of insertion slots, wherein in each of the plurality of rotor bars, the two protruding portions are respectively connected to two opposite ends of the insertion portion and respectively protrude from two opposite sides of the rotor core, and the two protruding portions each has an extension direction, that has an angle with respect to an extension direction of the insertion portion, in order to clamp and fix the rotor core therebetween. In addition, the present disclosure also provides a method for manufacturing the rotor mechanism.

In a method for connecting an end ring to conductor strips of a rotor of a motor, a core is provided by stacking silicon steel sheets. Each of the silicon steel sheets comprises an aperture and slots. Conductor strips are made with a cross-sectional shape corresponding to the slots and a length larger than that of the core. The conductor strips is inserted in the slots while locating the ends thereof out of the core. Two end rings are cast by using mold to wrap the ends of the conductor strips while keeping the molds away from the core, filling molten copper in the molds so that the molten copper partially melts the ends of the conductor strips, and cooling the molten copper via the molds so that the molten copper is cooled and hardened to provide the end rings. Then, the end rings is polished.

A rotor for a high-speed, high-power electric motor includes, according to the rotor axis, a magnetic mass surrounded on both sides by short-circuit rings, and crossed at several notches by electrical conductors connecting the short-circuit rings to form a squirrel cage. Each electrical conductor is formed of a single bar having a trapezoidal section over its entire length.

A rotor of an electric motor including a rotor core, two conductive end plates, a plurality of conductors and a casting metal is provided. The rotor core has a central hole and a plurality of slots surrounding the central hole at a predetermined interval. The two conductive end plates, disposed at two ends of the rotor core, have a plurality of fixing structures, respectively. A plurality of cavities is disposed between two neighboring fixing structures and the shape and the positions of the cavities correspond to that of the slots. The conductors are shaped as long bars and penetrate the slots. Two ends of the conductors are fixed by the fixing structures. The casting metal is injected into the cavities and the slots, and further covers the peripheral of the conductors and the fixing structures, two ends of the rotor core and outside of the two conductive end plates.