A motor for a laundry appliance includes a drive shaft coupled to a drum at a first end. The rotor frame is coupled proximate the second end of the drive shaft, where the rotor frame includes at least one polymeric material. A central hub includes a core and a perimetrical ring that extends circumferentially around the core. A plurality of recesses are defined within a planar surface of the perimetrical ring, wherein a portion of the polymeric material is received within the plurality of recesses to secure the rotor frame to the central hub.

Kickback control methods for power tools. One power tool includes a movement sensor configured to measure an angular velocity of the housing of the power tool about the rotational axis. The power tool includes an electronic processor coupled to the switching network and the movement sensor and configured to implement kickback control of the power tool. To implement the kickback control, the electronic processor is configured to control the switching network to drive the brushless DC motor, receive measurements of the angular velocity of the housing of the power tool from the movement sensor, determine that a plurality of the measurements of the angular velocity of the housing of the power tool exceed a rotation speed threshold, and control the switching network to cease driving of the brushless DC motor in response to determining that the plurality of the measurements of the angular velocity exceed the rotation speed threshold.

An electric work machine, such as a lawn mower includes a motor case (22) fixed inside a main-body housing (10). A brushless motor (21) is housed inside the motor case (22) and includes a stator (23) having a stator core (40), coils (45), and upper and lower insulators (42, 43), and a rotor (24) disposed inward of the stator (23) and having a rotary shaft (25). A spindle (17) is driven by the rotary shaft (25). The motor case (22) holds the stator (23) and axially supports the rotary shaft (25) via bearings (68, 76). One or more insulating members, such as an insulating cap (67) and/or a resin layer (78), provide electrical insulation between the stator core (40) and the rotary shaft (25).

A drive unit for an electrically driven vehicle with an inverter module, an electric machine a stator which is controllable by the inverter module. The rotor of the electric machine rotationally drivingly communicates with at least one shaft of the drive unit, the shaft being rotatably supported in a respective associated housing by a bearing arrangement. The housing and the inverter module are grounded. Further, the drive unit has a grounded, low-impedance electrical connection between the shaft and the inverter module so that, when a potential difference occurs between the shaft and the inverter module, a short circuit is produced. Low-impedance potential equalizer is provided between the shaft and the associated housing. It is provided that the shaft is formed as a rotor shaft or as a transmission shaft, the bearing arrangement has two bearings spaced apart axially from one another, and the potential equalizer is formed axially between the two bearings.

An electrically controllable drive assembly including an electric motor having a rotor capable of being driven to execute a rotational movement, a motor shaft connected in rotationally fixed fashion to the rotor, and a signal transmitter of a sensor device for the electronic acquisition and evaluation of the angle of rotation of the motor shaft. The signal transmitter is indirectly anchored on the motor shaft via a holding element. The holding element is a hollow cylinder that has an open first end with which the holding element is fastened on the motor shaft and a second end, situated facing away from the motor shaft, and at least one holding element region that extends into the open cross-section of the holding element.

A motor includes: an electrically conductive case; a shaft stored in the case and placed such that a part of the shaft penetrates the case; and a bearing via which the shaft is rotatably attached to the case. The shaft has an electrically conductive shaft material, and a high-resistance layer covering a surface of the shaft material and having a higher electric resistance than the shaft material.

A rotation device includes a rotor; an inlet flow passage that guides a cooling medium toward the outside in a radial direction of the rotor; an axial flow passage that is connected to the inlet flow passage and guides the cooling medium along a rotation axis of the rotor; and an outlet flow passage that is connected to the axial flow passage and guides the cooling medium toward the inside in the radial direction of the rotor. In addition, an outlet of the outlet flow passage is provided on the outside in the radial direction of an inlet of the inlet flow passage in the rotor.

Hybrid power train (1) with a low-voltage motor-generator (2), in particular with a 48V motor-generator (2), comprising: an internal combustion engine (3); a clutch (4) operatively connected to the internal combustion engine (3); a drive shaft (5) which at a first end portion is operatively connected to the clutch (4), and which at a second end portion is operatively connected to a gearbox; a low-voltage motor-generator (2) operatively connected to the drive shaft (5); an inverter unit (7) operatively connected to the low-voltage motor-generator (2); an electronic control unit (8); an electric power source (9) operatively connected to the inverter unit (7); wherein the low-voltage motor-generator (2) is arranged in a concentric manner around the drive shaft (5) in such a way as to form a driving connection between a rotor of the low-voltage motor-generator (2) and the drive shaft (5); wherein the low-voltage motor-generator (2), the inverter unit (7) the electric power source (9), and the gearbox are arranged entirely inside a bell housing (10) of the gearbox, and wherein the electronic control unit (8) comprises a) at least one controller arranged in the bellhousing (10) and no controller arranged out of the bellhousing (10); b) two or more controllers, wherein at least one controller is arranged in the bellhousing (10) and at least one controller is arranged out of the bellhousing (10); or c) at least one controller arranged out of the bellhousing (10) and no controller arranged in the bellhousing (10).

A rotor shaft for an electric machine includes a rotor shaft main body and a rotor shaft core which is arranged therein and which is connected to the rotor shaft main body. The rotor shaft comprises a substantially axially running cooling cavity configured to conduct a cooling fluid, and the rotor shaft core is composed of a different material than the rotor shaft main body.

The present invention relates to an in-wheel motor driving apparatus for reducing weight, improving Hall sensor assembly performance, and reducing a defect rate. According to one embodiment of the present invention, the weight of an in-wheel motor can be reduced by separating a suspension housing and a shaft and applying different materials thereto. Furthermore, the ease of assembling a Hall sensor can be improved, and the defect rate can be reduced.