公开(公告)号：US20180287542A1

公开(公告)日：2018-10-04

申请号：US15938302

申请日：2018-03-28

Applicant: GRUNDFOS HOLDING A/S

Inventor： Klaus VESTERGAARD KRAGELUND ,  Jan PLOUGMANN ,  Jan CARØE AARESTRUP

IPC: H02P27/04 ,  H02P27/08 ,  F04D13/06 ,  F04D15/00

CPC classification number: H02P27/047 ,  F04D13/06 ,  F04D13/0606 ,  F04D15/0066 ,  H02P27/06 ,  H02P27/08

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).

公开(公告)号：US20180283383A1

公开(公告)日：2018-10-04

申请号：US15940048

申请日：2018-03-29

Applicant: GRUNDFOS HOLDING A/S

Inventor： Klaus VESTERGAARD KRAGELUND ,  Jan PLOUGMANN ,  Jan CARØE AARESTRUP

IPC: F04D13/06 ,  F04D29/42 ,  F04D29/12

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).

公开(公告)号：US20180335038A1

公开(公告)日：2018-11-22

申请号：US15983650

申请日：2018-05-18

Applicant: GRUNDFOS HOLDING A/S

Inventor： Klaus VESTERGAARD KRAGELUND ,  Jan PLOUGMANN ,  Jan CARØE AARESTRUP

IPC: F04D13/06 ,  F04D15/00

CPC classification number: F04D13/0686 ,  F04D15/00 ,  F04D29/426

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.

公开(公告)号：US20180287539A1

公开(公告)日：2018-10-04

申请号：US15938420

申请日：2018-03-28

Applicant: GRUNDFOS HOLDING A/S

Inventor： Klaus VESTERGAARD KRAGELUND ,  Jan PLOUGMANN ,  Jan CARØE AARESTRUP

IPC: H02P23/00 ,  H02P25/024 ,  H02P25/16 ,  H02P27/08 ,  H02P29/40 ,  F04D15/00 ,  F04D13/06

CPC classification number: H02P23/009 ,  F04D13/06 ,  F04D15/0066 ,  F04D15/0088 ,  H02P21/0089 ,  H02P25/024 ,  H02P25/16 ,  H02P27/085 ,  H02P29/40 ,  H02P2201/03 ,  H02P2207/05

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.

公开(公告)号：US20180283382A1

公开(公告)日：2018-10-04

申请号：US15939926

申请日：2018-03-29

Applicant: GRUNDFOS HOLDING A/S

Inventor： Klaus VESTERGAARD KRAGELUND ,  Jan PLOUGMANN ,  Jan CARØE AARESTRUP

IPC: F04D13/06 ,  F04D29/08 ,  F04D29/046

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.