A rotor for a motor includes a sensor ring, a rotor shaft and an over-molded body configured to couple the sensor ring to the rotor shaft. The rotor may further include at least one magnet and a magnet support where the magnet support is disposed between the at least one magnet and the rotor shaft. The over-molded body couples the sensor ring, the rotor shaft, the magnet support and the at least one magnet to each other.

A motor (1) including a rotary shaft (2) and a bearing portion (53) including an inner ring and an outer ring and a magnet (51) and a balance adjusting portion (52). The balance adjusting portion (52) and the magnet (51) are fixed. The balance adjusting portion (52) is in contact with an inner ring of the bearing portion (53).

The invention is a flywheel rotor that includes a number of adjacent laminations, stacked one on top of another, where each of the laminations has the same shape and is rotationally symmetric around a center axis, and where the shape is substantially circular and includes a plurality of protrusions exterior to the circumference, and each of the laminations includes at least one hole for a fastening bolt to pass through. The invention typically includes an endplate at each end of stack of laminations. One of the two endplates may attach to a stubshaft.

A balance weight for an electric compressor motor according to an embodiment may include a main weight material and a specific gravity-adjusting material. The balance weight for an electric compressor motor of the present invention can implement the required specific gravity by changing the content of the specific gravity-adjusting material and can adjust the size by increasing the specific gravity, which is advantageous for miniaturization, allowing for improvement in motor design, and expanding the range of applicable devices.

An electric drive unit and method of assembling the same is disclosed. The electric drive unit includes a rotor having a rotor shaft, and gear shaft, where the rotor shaft is inserted into the gear shaft. The gear shaft is supported by two bearings, while the rotor shaft supported directly at one end by a bearing and at the other by the gear shaft. A wave spring is also disclosed that provides an axial loading to the rotor shaft. Also disclosed is a balancing ring secured to an end of the rotor via a locknut. The balancing ring can be machined in order to balance the rotor. The rotor shaft can be connected to the gear shaft via a spline connection. The rotor shaft can bear against the gear shaft via a pilot journal and pilot bore defined on the rotor shaft and gear shaft respectively.

A for hardening a bridge assembly of a rotational body having an axis of rotation for an electrical drive, including the steps for balancing and rotational hardening of, rotating the rotational body about an axis of rotation at an imbalance determination rotational speed to detect an imbalance of the rotational body, determining the imbalance of the rotational body, fastening at least one balancing weight to or removing at least one balancing weight from the rotational body at a standstill rotational speed to compensate the imbalance, the hardening including rotating the rotational body about the axis of rotation at a hardening rotational speed, the magnitude of the hardening rotational speed being greater than the magnitude of the imbalance determination rotational speed.

The invention relates to an electric machine which is cooled or can be cooled by a fluid, comprising a rotor, a stator, and at least one end disk which are arranged in a housing, where the end disk and the rotor are arranged on a shaft, in particular a hollow shaft, and the end disk is arranged on at least one axial end of the rotor, where at least one first fluid region is formed between a first face side of the end disk and at least one axial end of the rotor and a second fluid region between a second face side of the end disk and the housing, where the two fluid regions comprise at least one outer fluid connection and at least one inner fluid connection which each connect the two fluid regions to one another such that the fluid can circulate at least in sections between the first and the second fluid region.

The invention is a flywheel rotor that includes a number of adjacent laminations, stacked one on top of another, where each of the laminations has the same shape and is rotationally symmetric around a center axis, and where the shape is substantially circular and includes a plurality of protrusions exterior to the circumference, and each of the laminations includes at least one hole for a fastening bolt to pass through. The invention typically includes an endplate at each end of stack of laminations. One of the two endplates may attach to a stubshaft.

An electric drive motor includes a stator with pole shoes and at least one electrically controllable stator winding. A permanent magnet rotor is rotatably mounted in the field of the stator winding leaving an annular gap. The rotor includes a motor shaft and a laminated core on the shaft. The core includes at least a number of permanent magnets corresponding to the number of poles of the rotor. The magnets in the core are coated with a plastic envelope having at least one side wall covering the core on at least one axial front side. The side wall includes at least one recess freeing areas of the axial front side covered by the side wall, as access openings for boring the core to balance the rotor. A household appliance has the electric drive motor and an injection mold is used for producing the electric drive motor coated with the envelope.

A rotor according to an embodiment includes a cylindrical magnet and a balance adjusting portion. The balance adjusting portion is provided to at least one end portion of the magnet in a rotation axis direction, and is used for adjusting rotational balance of the rotor. The balance adjusting portion has a first member that is in contact with an end portion of the magnet and a second member press-fitted onto the rotary shaft with the first member interposed therebetween.