Abstract: A hybrid drive for an electric bicycle comprising a pedal crank drive that contains a pedal crank axle connected to pedal cranks at both ends, an electromotive drive electrically connected to an accumulator, which contains two electric motors that are connected to different transmission elements of a superposition transmission, which on the drive side is connected to the pedal crank drive and on the output side is connected to the sprocket of a chain drive of the electric bicycle recuperative electromotive braking of the electric bicycle with charging of the accumulator.

Abstract: A hybrid drive for an electric bicycle comprising a pedal crank drive that contains a pedal crank axle connected to pedal cranks at both ends, an electromotive drive electrically connected to an accumulator, which contains two electric motors that are connected to different transmission elements of a superposition transmission, which on the drive side is connected to the pedal crank drive and on the output side is connected to the sprocket of a chain drive of the electric bicycle recuperative electromotive braking of the electric bicycle with charging of the accumulator.

Abstract: Pump arrangement (20) for conveying a fluid, with a housing (22), with a first rotatably mounted pump member (24), and with a second rotatably mounted pump member (26), wherein a fluid-conveying effect is produced by means of a relative rotary movement between the first and the second pump member (24, 26), wherein the first pump member (24) can be driven by an electric motor (42) which is arranged concentrically to the first pump member (24) and which has a stator (44) and a rotor (46), wherein the rotor (46) is fixed to the first pump member (24) and wherein the pump arrangement (20) is constructed in such a way that fluid is present in an annular gap (58) between the rotor (46) and the stator (44). In this case, the pump arrangement has temperature control means for heating the fluid in the annular gap (58).

Abstract: A drive unit (3) for a submersible oil pump, including a housing (7), a motor compartment (9) that is surrounded by the housing (7), and a rotor (13) arranged in the motor compartment (9), whereby a first fluid path (35) leading from a submerged oil environment (37) of the housing (7) to the motor compartment (9) is provided so as to allow oil to flow from the submerged oil environment (37) into the motor compartment (9).

Abstract: A brushless electric motor with an outer rotor on which permanent magnet elements are arranged, and a stator which has electromagnetic stator poles, wherein the electromagnetic stator poles each have a pole foot, a pole tooth and a pole shoe made of iron materials, and with an insulation layer about the iron elements of the stator poles, and with an electric coil winding which is arranged on the insulation layer, characterized in that the pole shoes have in cross section a free-form rounded portion, preferably in the direction of their end regions, and become narrower running away outward toward the ends at an angle >90° with respect to the pole tooth on the underside of the pole shoe at the location where the insulation layer is applied, wherein the insulation layer on the pole shoe extends on the surface for the coil winding receptacle, that is to say on the basically opposite surface of the insulation layer on the pole shoe, at a right angle with respect to the pole tooth.

Abstract: A drive unit (3) for a submersible oil pump, including a housing (7), a motor compartment (9) that is surrounded by the housing (7), and a rotor (13) arranged in the motor compartment (9), whereby a first fluid path (35) leading from a submerged oil environment (37) of the housing (7) to the motor compartment (9) is provided so as to allow oil to flow from the submerged oil environment (37) into the motor compartment (9).

Abstract: Pump arrangement (20) for conveying a fluid, with a housing (22), with a first rotatably mounted pump member (24), and with a second rotatably mounted pump member (26), wherein a fluid-conveying effect is produced by means of a relative rotary movement between the first and the second pump member (24, 26), wherein the first pump member (24) can be driven by an electric motor (42) which is arranged concentrically to the first pump member (24) and which has a stator (44) and a rotor (46), wherein the rotor (46) is fixed to the first pump member (24) and wherein the pump arrangement (20) is constructed in such a way that fluid is present in an annular gap (58) between the rotor (46) and the stator (44). In this case, the pump arrangement has temperature control means for heating the fluid in the annular gap (58).

Abstract: A sensor unit comprises a mounting base (1) on which an air moisture sensor (3) and an air temperature sensor (4) are disposed. The air moisture sensor (3) is disposed over a bore (5) of the mounting base and covers the bore (5) at least partially. An intensive thermal coupling between the air moisture sensor (3), air temperature sensor (4) and air mixture to be analysed is produced.