Noise caused by a gap between a rotor and a plate can be suppressed even when there are dimensional variations in members or assembly states. In a configuration of a stepping motor including front side and end side stator assemblies (200, 300), a rotor (400) provided with a rotor member (402) and a shaft (403) that are accommodated in the stator assemblies (200, 300), and a front plate (210) and an end plate (310) that are arranged on both sides of the stator assemblies (200, 300) in an axial direction, and are configured to couple the stator assemblies (200, 300), a projection (700) in an annular shape is provided on a surface of the front plate (210) facing the rotor member (402) to protrude toward the rotor member (402), a coil spring (800) that is interposed between the front plate (210) and the rotor member (402) is accommodated in the inner side of the projection (700), and the rotor (400) is urged toward the end plate (310) by the coil spring to be elastically pressed against the end plate (310).

Noise caused by a gap between a rotor and a plate can be suppressed even when there are dimensional variations in members or assembly states. In a configuration of a stepping motor including front side and end side stator assemblies (200, 300), a rotor (400) provided with a rotor member (402) and a shaft (403) that are accommodated in the stator assemblies (200, 300), and a front plate (210) and an end plate (310) that are arranged on both sides of the stator assemblies (200, 300) in an axial direction, and are configured to couple the stator assemblies (200, 300), a projection (700) in an annular shape is provided on a surface of the front plate (210) facing the rotor member (402) to protrude toward the rotor member (402), a coil spring (800) that is interposed between the front plate (210) and the rotor member (402) is accommodated in the inner side of the projection (700), and the rotor (400) is urged toward the end plate (310) by the coil spring to be elastically pressed against the end plate (310).

Aircraft electric motors include a motor unit having a rotor and a stator. The stator includes a plurality of windings and cooling channels arranged to provide cooling thereto. A drive unit is configured to drive operation of the motor unit. A cooling system includes a working fluid arranged within a cooling fluid flow path, wherein the cooling fluid flow path includes a liquid cooling path configured to direct flow of the working fluid through, at least, the cooling channels of the motor unit and a vapor cooling path configured to direct flow of the working fluid through the drive unit and a separator arranged upstream of each of the liquid cooling path and the vapor cooling path and configured to direct a liquid portion of the working fluid into the liquid cooling path and configured to direct a vapor portion of the working fluid into the vapor cooling path.

A kitchen appliance, including at least one kitchen appliance base and at least one preparation module is provided. The kitchen appliance base includes at least one electrical interface and at least one receiving region. The preparation module includes at least one electrical counter-interface for electrical contacting with the electrical interface. The electrical interface includes at least two power contacts and at least one auxiliary contact. The electrical counter-interface includes at least two power counter-contacts and at least one auxiliary counter-contact. In the kitchen appliance, the insertion forces for the electrical contacting for the user are reduced, are realized by the power contacts and the power counter-contacts, as well as the auxiliary contact and the auxiliary counter-contact being designed and configured such that the power contacts are electrically contacted with the power counter-contacts at a different point in time than is the auxiliary contact with the auxiliary counter-contact.

A kitchen appliance, including at least one kitchen appliance base and at least one preparation module is provided. The kitchen appliance base includes at least one electrical interface and at least one receiving region. The preparation module includes at least one electrical counter-interface for electrical contacting with the electrical interface. The electrical interface includes at least two power contacts and at least one auxiliary contact. The electrical counter-interface includes at least two power counter-contacts and at least one auxiliary counter-contact. In the kitchen appliance, the insertion forces for the electrical contacting for the user are reduced, are realized by the power contacts and the power counter-contacts, as well as the auxiliary contact and the auxiliary counter-contact being designed and configured such that the power contacts are electrically contacted with the power counter-contacts at a different point in time than is the auxiliary contact with the auxiliary counter-contact.

A method of manufacturing a rotor assembly for an electric motor is disclosed. The rotor assembly includes a lamination stack extending along an axis, a plurality of magnets including a first and second magnet each coupled to the lamination stack, and a plurality of pole pieces including a first pole piece spaced from the lamination stack and separate from the lamination stack. The rotor assembly also includes a plurality of spacers including a first spacer spaced from the lamination stack. The method includes the step of disposing the first magnet and the second magnet between the lamination stack and the first pole piece. The method also includes the step of disposing the first spacer between the lamination stack and the first pole piece to reduce flux leakage between the lamination stack and the first pole piece.

A method of manufacturing a rotor assembly for an electric motor is disclosed. The rotor assembly includes a lamination stack extending along an axis, a plurality of magnets including a first and second magnet each coupled to the lamination stack, and a plurality of pole pieces including a first pole piece spaced from the lamination stack and separate from the lamination stack. The rotor assembly also includes a plurality of spacers including a first spacer spaced from the lamination stack. The method includes the step of disposing the first magnet and the second magnet between the lamination stack and the first pole piece. The method also includes the step of disposing the first spacer between the lamination stack and the first pole piece to reduce flux leakage between the lamination stack and the first pole piece.

An electric motor and associated systems and methods are described herein. A representative electric motor includes a stator having windings therein, wherein the stator has a diameter and a length greater than the diameter; and a rotor assembly inside the stator, wherein the rotor assembly includes a set of magnets configured to provide six or more poles.

A magnetic coupling includes an inner rotor (11) and an outer rotor (9) which at least partly surrounds the inner rotor (11). These rotors (11, 9) each are formed of magnetic material (18) and are coupled to one another by way of magnetic forces. The inner rotor (11) and/or the outer rotor (9) contain powdery, magnetizable material (18). The powdery, magnetizable material (18) is magnetized at a side lying opposite the other rotor at several locations distributed over the periphery.

A magnetic coupling includes an inner rotor (11) and an outer rotor (9) which at least partly surrounds the inner rotor (11). These rotors (11, 9) each are formed of magnetic material (18) and are coupled to one another by way of magnetic forces. The inner rotor (11) and/or the outer rotor (9) contain powdery, magnetizable material (18). The powdery, magnetizable material (18) is magnetized at a side lying opposite the other rotor at several locations distributed over the periphery.