Abstract: The present invention is a liquid cooled electric machine (10) having enhanced cooling of the end turns (22) by providing intimate contact between the end turns and coolant fluid flowing through a first annular flow channel (34) and a second annular flow channel (50). Furthermore, a cylindrical liner (62) which is force fit within the annulus of the stator 12 forms part of the first and second annular flow channels and further provides support against radially inward deflection of the end turns (22). Furthermore, the invention is a cooling system (200) for an exciter generator in a self-excited electric power generator which has a liquid coolant circuit (216) which splits coolant flow between an inside surface (222) of a fullwave rectifier assembly (214) and an outside surface (226) of the fullwave rectifier assembly which absorbs heat from the rotor of the exciter generator.

Abstract: A small size electric motor has a housing having an opening, a heat conductive bearing shield arranged to close the opening, a commutating device provided with commutator brushes in the housing. The bearing shield has a first guiding wall and at least one second guiding wall arranged at a distance from one another for guiding the commutator brushes. A heat conductive isolating layer is located between the guiding walls and the commutator brushes which are guided on the guiding walls with a small play.

Abstract: An actuator device for an electric window winder (101) having an electric motor (104) and a window displacement actuator element (112) which is displaceable with respect to a frame (102) of the device under action of the electric motor (104). An electronic unit (27) for drive and control of the electric motor (104) has power elements and is housed in a first portion (120) of the frame (102), and the electric motor is housed in a second portion of (107) of the frame (102). The first and second portions (120, 107) of the frame (102) are formed by a single one-piece body part of the frame, and the power components of the electronic unit (27) are in direct thermal contact with the first portion (120), which is formed of a thermally conductive metal material for the dissipation of heat from the power components.

Abstract: A split-phase starter for an electric motor having a casing made up of a casing body and a lid secured to the casing body, the casing body having a first casing and a second casing, a relay contact mechanism being arranged in the casing body, and a positive temperature coefficient thermistor being arranged in the second casing.

Abstract: A high permeability slot wedge for a dynamoelectric machine with the wedge configured as an elongated bar of uniform cross-sectional configuration formed of a ferromagnetic material having modestly good electrically insulative properties comprising approximately by weight 60% to 80% relatively small ferromagnetic particles such as powdered iron, about 10% reinforcing glass fabric; and 15% to 20% unsaturated thermosetting plastic resin binder such as a polyester resin is disclosed. The ferromagnetic material is homogeneously distributed throughout the thermosetting plastic binder so that the permeability and resistivity of the resulting wedge is substantially uniform throughout.

Abstract: A frameless motor includes a laminated annular stator core having an internal bore and a winding projecting from the ends. The bore is enlarged in the end laminations with an annular diameter precisely defining the bearing axis. Cup-shaped bearing supports have precisely formed ends complementing the enlarged bore with an axially spaced bearing wall. the rotor is supported in the bearing supports to support and align the rotor with an air gap to create a complete and framelss dynamoelectric machine which can subsequently be assembled to any suitable support or housing. A cup-shaped cylindrical housing with the outer end machined to a stepped recess has an internal diameter substantially corresponding to the inner bore of the stator core and an outer nominal diameter complementing the internal enlarged bore. Alternatively, the cup-shaped bearing support is formed with a cylindrical housing having an end flange which is precisely machined to the bearing opening and the enlarged bore.

Abstract: An asynchronous motor comprising a stator 1, a rotor including a core 2 and a multilayer screen 3. Each layer 4 of the screen 3 is made of an iron-containing alloy of high electrical conductivity, the value of electrical conductivity in each of the succeeding layers, in the direction of the rotor axis, being assumed to be decreasing.

Abstract: In a direct-current machine comprising a permanent-magnetic stator, the detent torque or resting moment of the rotor is to be reduced by simple and low-cost technical means. This is achieved by disposing the permanent-magnet shells of the stator asymmetrically with respect to each other.