Abstract: A pump assembly (1) includes a rotor axle (45) extending along a rotor axis (R), an impeller (12) fixed to the rotor axle (45), a pump housing (11) accommodating the impeller (12), and a drive motor with a stator (17) and a rotor (51). The rotor (51) is fixed to the rotor axle (45) for driving the impeller (12). A rotor can (57) accommodates the rotor (51). The rotor can (57) includes a rotor can flange (63). An electronics housing (13) has a cap (21) including a first material (139) forming a front face (19) of the cap (21). The front face (19) extends essentially perpendicular to the rotor axis (R). The first material (139) is at least partially overmolded with a second material (141) at an inner side of the cap (21). The second material (141) is more heat-conductive than the first material (139).

Abstract: A pump assembly (1) includes a rotor axle (45) extending along a rotor axis (R), an impeller (12) fixed to the rotor axle (45), a pump housing (11) accommodating the impeller (12), and a drive motor including a stator (17) and a rotor (51). The rotor (51) is fixed to the rotor axle (45) for driving the impeller (12). A rotor can (57) accommodates the rotor (51). The rotor can (57) include a rotor can flange (63). A stator housing (13) accommodates the stator (17). The stator housing (13) is secured to the pump housing (11) by a bayonet ring (113). The bayonet ring (113) is resiliently spring-loaded for axially biasing the stator housing (13) towards the impeller (12) against the pump housing (11).

Abstract: A pump assembly (1) includes an impeller with a rotor axis (R). A pump housing (11) accommodates the impeller. A drive motor with a stator (14) and a rotor (51) drives the impeller (12). A rotor can (57) accommodates the rotor (51), and a stator housing (13) accommodating the stator (14). The rotor can (57) is mounted by a first coupling to the pump housing (11). The stator housing (13) is mounted by a second coupling to the pump housing (11). The first coupling is located closer to the rotor axis (R) than the second coupling.

Abstract: A pump assembly (1) includes an impeller (12) with a rotor axis (R), a pump housing (11) accommodating the impeller (12), a drive motor with a stator (14) and a rotor (51) for driving the impeller (12). A rotor can (57) accommodates the rotor (51), and a stator housing (13) accommodates the stator (14). The rotor can (57) includes a rotor can flange (63) having a lateral rotor can flange face (87) fitting within a peripheral wall (69) of the pump housing (11). The lateral rotor can flange face (87) has at least three radial projections (91) abutting against the peripheral wall (69) of the pump housing (11) and centering the rotor can (57) with respect to the peripheral wall (69) of the pump housing (11).

Abstract: A pump assembly includes a rotor axle, an impeller and a pump housing defining a radial inner reference surface. A drive motor includes a stator accommodated in stator housing and a rotor accommodated in a rotor can. A radial bearing ring is in sliding contact with the rotor axle. A bearing retainer engages the radial bearing ring and centers it with respect to the radial inner reference surface. A neck ring is coupled to the pump housing and has a circumferential wall section. The impeller is located axially between the bearing retainer and the neck ring. The circumferential wall section at least partially extends into the impeller or the impeller at least partially extends into the circumferential wall section. The circumferential wall section includes a cylindrical radial outer surface and a cylindrical radial inner surface. The radial outer surface is eccentric with respect to the radial inner surface.

Abstract: A pump assembly (1) includes a rotor axle (45), an impeller (12) fixed to the rotor axle, and a pump housing (11) accommodating the impeller and defining a radial inner reference surface (71). A drive motor includes a stator (17) and a rotor (51). The rotor is fixed to the rotor axle for driving the impeller. A rotor can (57) accommodates the rotor and includes a rotor can flange (63). A stator housing (13) accommodates the stator. A radial bearing ring (47) is in sliding contact with the rotor axle. A bearing retainer (41) engages the radial bearing ring and centers the radial bearing ring with respect to the radial inner reference surface. The rotor can flange has a radial distance to the pump housing. The rotor can includes a radial inner centering surface (65) centered by radially abutting against a radial outer centering surface (67) of the bearing retainer.

Abstract: A pump assembly (1) includes a rotor axle (45) extending along a rotor axis (R), an impeller (12) fixed to the rotor axle (45), a pump housing (11) accommodating the impeller (12), and a drive motor with a stator (17) and a rotor (51). The rotor (51) is fixed to the rotor axle (45) for driving the impeller (12). A rotor can (57) accommodates the rotor (51). The rotor can (57) includes a rotor can flange (63). An electronics housing (13) has a cap (21) including a first material (139) forming a front face (19) of the cap (21). The front face (19) extends essentially perpendicular to the rotor axis (R). The first material (139) is at least partially overmolded with a second material (141) at an inner side of the cap (21). The second material (141) is more heat-conductive than the first material (139).

Abstract: A pump assembly (1) includes a rotor axle (45) extending along a rotor axis (R), an impeller (12) fixed to the rotor axle (45), a pump housing (11) accommodating the impeller (12), and a drive motor including a stator (17) and a rotor (51). The rotor (51) is fixed to the rotor axle (45) for driving the impeller (12). A rotor can (57) accommodates the rotor (51). The rotor can (57) include a rotor can flange (63). A stator housing (13) accommodates the stator (17). The stator housing (13) is secured to the pump housing (11) by a bayonet ring (113). The bayonet ring (113) is resiliently spring-loaded for axially biasing the stator housing (13) towards the impeller (12) against the pump housing (11).

Abstract: A pump assembly (1) includes a rotor axle (45), an impeller (12) fixed to the rotor axle (45), and a pump housing (11) accommodating the impeller (12). The pump housing (11) defines a first radial inner reference surface (71). A drive motor includes a stator (17) and a rotor (51) fixed to the rotor axle (45) for driving the impeller (12). A rotor can (57) accommodates the rotor (51) and includes a rotor can flange (63). A stator housing (13) accommodates the stator (17) and includes windings around a stator core (114). A first surface portion of the stator core (114) is overmolded with a first material (122) as an electrically insulating layer between the windings and the stator core (114). A second surface portion of the stator core (114) is overmolded with a second material (124) forming walls of the stator housing (13).

Abstract: A pump assembly (1) includes a pump unit (2) capable of providing a desired head (H0) at zero flow rate, a brushless speed-controlled permanent-magnet AC drive motor (205) for driving the pump unit (2), and a control unit for controlling the drive motor (205). The control unit includes a frequency converter configured to receive an input voltage (Uin). The drive motor (205) is operable in a field-weakening mode and non-field-weakening mode. The drive motor (205) is undersized for driving the pump unit (2) at a design input voltage (U0) to provide a lower head (H) than the desired head (H0) at zero flow rate in the non-field-weakening mode and for driving the pump unit (2) to provide the desired head (H0) at zero flow rate in the field-weakening mode.

Abstract: A pump assembly (1) includes a pump unit (2), an electrical drive motor (203) for driving the pump unit (2), and a control unit (201) for controlling the drive motor (203). The control unit (201) includes a frequency converter (209), a voltage converter (207) and a controller (211). The voltage converter (207) is configured to provide an input voltage (Uin) to the frequency converter (209). The input voltage (Uin) is adjustable within a voltage range between a minimum input voltage (Umin) and a maximum input voltage (Umax). The controller (211) is configured to determine an actual power consumption of at least one of the drive motor (203), the frequency converter (209) and the voltage converter (207) during operation of the pump unit (2). The controller (211) is further configured to tune the input voltage (Uin) depending on the determined actual power consumption during operation of the pump unit (2).

Abstract: A pump assembly (1) includes a pump unit (2) with an impeller (12) having a rotational axis (R), an electrical drive motor for driving the impeller (12), and a control unit for controlling the drive motor. The control unit includes a main module in a housing (15), a first detachable plug-in module (23) and a second detachable plug-in module (27). The main module is fixed to the drive motor and configured to control the drive motor. The first plug-in module (23) and the second plug-in module (27) are selectively pluggable into a first position to communicate with the main module via at least one wireless communication channel.

Abstract: A pump assembly (1) includes an impeller with a rotor axis (R). A pump housing (11) accommodates the impeller. A drive motor with a stator (14) and a rotor (51) drives the impeller (12). A rotor can (57) accommodates the rotor (51), and a stator housing (13) accommodating the stator (14). The rotor can (57) is mounted by a first coupling to the pump housing (11). The stator housing (13) is mounted by a second coupling to the pump housing (11). The first coupling is located closer to the rotor axis (R) than the second coupling.

Abstract: A pump assembly (1) includes a pump unit (2), an electrical drive motor (203) for driving the pump unit (2), and a control unit (201) for controlling the drive motor (203). The control unit (201) includes a frequency converter (209), a voltage converter (207) and a controller (211). The voltage converter (207) is configured to provide an input voltage (Uin) to the frequency converter (209). The input voltage (Uin) is adjustable within a voltage range between a minimum input voltage (Umin) and a maximum input voltage (Umax). The controller (211) is configured to determine an actual power consumption of at least one of the drive motor (203), the frequency converter (209) and the voltage converter (207) during operation of the pump unit (2). The controller (211) is further configured to tune the input voltage (Uin) depending on the determined actual power consumption during operation of the pump unit (2).

Abstract: A pump assembly (1) includes an impeller (12) with a rotor axis (R), a pump housing (11) accommodating the impeller (12), a drive motor with a stator (14) and a rotor (51) for driving the impeller (12). A rotor can (57) accommodates the rotor (51), and a stator housing (13) accommodates the stator (14). The rotor can (57) includes a rotor can flange (63) having a lateral rotor can flange face (87) fitting within a peripheral wall (69) of the pump housing (11). The lateral rotor can flange face (87) has at least three radial projections (91) abutting against the peripheral wall (69) of the pump housing (11) and centering the rotor can (57) with respect to the peripheral wall (69) of the pump housing (11).

Abstract: A pump assembly (1) includes a pump unit (2) capable of providing a desired head (H0) at zero flow rate, a brushless speed-controlled permanent-magnet AC drive motor (205) for driving the pump unit (2), and a control unit for controlling the drive motor (205). The control unit includes a frequency converter configured to receive an input voltage (Uin). The drive motor (205) is operable in a field-weakening mode and non-field-weakening mode. The drive motor (205) is undersized for driving the pump unit (2) at a design input voltage (U0) to provide a lower head (H) than the desired head (H0) at zero flow rate in the non-field-weakening mode and for driving the pump unit (2) to provide the desired head (H0) at zero flow rate in the field-weakening mode.

Abstract: The present invention relates to a dosing system for dosing a first fluid, preferably flowing in a first flow passage (5) into a stream of a second fluid, preferably flowing in a second flow passage (9). The system may e.g. be used to dose a reducing agent into an exhaust gas from a combustion engine (1). The system comprises a valve (6), a nozzle (3) having an outlet arranged downstream of the valve (6), a flow passage (5) through which the first fluid can flow from a reservoir (4) to the nozzle outlet via the valve (6), and a control system (7) adapted to receive input from one or more sensors (8) and based thereon determine a request value based on which a valve opening period is determined. The valve opening period is different from zero and independent on the request value when the request value is below a predefined threshold value.

Abstract: A metering pump assembly for admixing a fluid reduction agent from a supply container and a pressurized air flow into an exhaust gas flow of a combustion engine includes an assembly housing and a pre-mixer at least partially within the housing. A membrane pump within the housing is fluidly connected between the supply container and the pre-mixer. An electric motor generates a rotational output. A transmission converts the rotational output of the electric motor into translatory movement. The translatory movement drives the membrane pump to pump the reduction agent from the supply container into the pre-mixer. The pressurized air flow is in fluid communication with the pre-mixer and mixes with the reduction agent within the pre-mixer to form a reduction agent air mixture. An exit conduit fluidly connects the pre-mixer to the exhaust gas flow. The reduction air mixture is delivered through the exit conduit and into the exhaust gas flow.

Abstract: A metering pump assembly for admixing a fluid reduction agent from a supply container and a pressurized air flow into an exhaust gas flow of a combustion engine includes an assembly housing and a pre-mixer at least partially within the housing. A membrane pump within the housing is fluidly connected between the supply container and the pre-mixer. An electric motor generates a rotational output. A transmission converts the rotational output of the electric motor into translatory movement. The translatory movement drives the membrane pump to pump the reduction agent from the supply container into the pre-mixer. The pressurized air flow is in fluid communication with the pre-mixer and mixes with the reduction agent within the pre-mixer to form a reduction agent air mixture. An exit conduit fluidly connects the pre-mixer to the exhaust gas flow. The reduction air mixture is delivered through the exit conduit and into the exhaust gas flow.

Abstract: A dosing pump assembly (9) is provided which is adapted to admix a liquid reducing agent to an exhaust gas flow. The dosing pump assembly includes an assembly housing (12) that houses an electric drive (15), a transmission (16), a membrane pump (17), and control and/or regulating electronics. The assembly housing (10) further includes a pre-mixing device in which the liquid reducing agent is impinged upon with a pressurized gas flow.