Abstract: The invention relates to a pump (5) having an electric motor (4), more particularly for a motor vehicle, for pumping a fluid, comprising an impeller (18) that has pumping elements (19) and can carry out a rotary movement about an axis of rotation (27); a working chamber around the impeller (18); an electric motor with a stator (13) and a rotor (16), the rotor (16) being provided with permanent magnets (17); and preferably a housing (8); the rotor (16) and the permanent magnets (17) being produced by sintering, and the permanent magnets (17) on the rotor (16) being integrally bonded to the rotor (16) by sintering.

Abstract: The invention relates to a gear pump (1) for conveying a fluid, said gear pump comprising a rotatably mounted, external geared toothed wheel (3) and an internal geared annular gear (2) that are meshed in order to generate a conveying action, and are arranged together with an electrically commutable stator (7) in a housing (5). The stator (7) extends concentrically around the annular gear (2) and interacts with the annular gear to generate an electromotive force. The annular gear (2) has a closed, homogeneous cylindrical surface and a plain bearing (13) is provided on the stator (7).

Abstract: The invention relates to a gear pump (1) for conveying a fluid, said gear pump comprising a rotatably mounted, external geared toothed wheel (3) and an internal geared annular gear (2) that are meshed in order to generate a conveying action, and are arranged together with an electrically commutable stator (7) in a housing (5). The stator (7) extends concentrically around the annular gear (2) and interacts with the annular gear to generate an electromotive force. The annular gear (2) has a closed, homogeneous cylindrical surface and a plain bearing (13) is provided on the stator (7).

Abstract: A method for controlling the feed rate of a feed pump, including a drive part having a drive motor and a hydraulic part having an intake opening, a discharge opening and a feed mechanism situated in between, a setpoint feed rate being predefined and the feed pump being triggered based on the setpoint feed rate, the temperature of the fluid and a pressure difference between the intake opening and the discharge opening of the hydraulic part of the feed pump.