公开(公告)号：EP3382890B1

公开(公告)日：2020-07-22

申请号：EP17164400.8

申请日：2017-03-31

Applicant: Grundfos Holding A/S

Inventor： Vestergaard Kragelund, Klaus ,  Plougmann, Jan ,  Aarestrup, Jan Carøe

IPC: H02P27/06 ,  F04D15/00

公开(公告)号：EP3382890A1

公开(公告)日：2018-10-03

申请号：EP17164400.8

申请日：2017-03-31

Applicant: Grundfos Holding A/S

Inventor： Vestergaard Kragelund, Klaus ,  Plougmann, Jan ,  Aarestrup, Jan Carøe

IPC: H02P27/06 ,  F04D15/00

Abstract: The present disclosure provides a pump assembly (1) comprising 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), wherein the control unit (201) comprises a frequency converter (209), a voltage converter (207) and a controller (211), wherein the voltage converter (207) is configured to provide an input voltage (U in ) to the frequency converter (209), the input voltage (U in ) being adjustable within a voltage range between a minimum input voltage (U min) and a maximum input voltage (U max ), wherein 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), and wherein the controller (211) is configured to tune the input voltage (U in ) depending on the determined actual power consumption during operation of the pump unit (2).

公开(公告)号：EP3382888A1

公开(公告)日：2018-10-03

申请号：EP17164402.4

申请日：2017-03-31

Applicant: Grundfos Holding A/S

Inventor： Vestergaard Kragelund, Klaus ,  Plougmann, Jan ,  Aarestrup, Jan Carøe

IPC: H02P21/00 ,  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: The present disclosure provides a pump assembly (1) comprising a pump unit (2)capable of providing a desired head H 0 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), wherein the control unit comprises a frequency converter configured to receive an input voltage (U in ), wherein the drive motor (205) is operable in a field-weakening mode and non-field-weakening mode, wherein the drive motor (205) is undersized for driving the pump unit (2) at a design input voltage (U 0 ) to provide a lower head H than the desired head H 0 at zero flow rate in the non-field-weakening mode and for driving the pump unit (2) to provide the desired head H 0 at zero flow rate in the field-weakening mode.