公开(公告)号：US20190339162A1

公开(公告)日：2019-11-07

申请号：US16474361

申请日：2017-12-18

Applicant: GRUNDFOS HOLDING A/S

Inventor： Flemming MUNK

IPC: G01M13/045 ,  F04D13/06 ,  F04D29/046 ,  F04D29/66 ,  G01K1/14

Abstract: A sensor assembly (2) is configured to perform fault detection in a pump assembly that includes an electric motor (70) and a fluid pump (30). The sensor assembly (2) includes a housing (4) configured to be mechanically attached to the pump (30) and configured to be attached into a bore provided in the pump (30). One or more vibration sensing element(s) (16) is/are arranged in the housing (4). The sensor assembly (2) includes a calculation unit (84) configured to receive sensor signals (V1, V2, V3) from the vibration sensing element(s) (16) and perform calculations and thereby detect motor bearing faults and cavitation.

公开(公告)号：US10468969B2

公开(公告)日：2019-11-05

申请号：US15382037

申请日：2016-12-16

Applicant: GRUNDFOS HOLDING A/S

Inventor： Jan Knudsen ,  Niels Høgholt Petersen

IPC: H02M1/32 ,  H02M7/04 ,  H02H9/00

Abstract: An electronic circuit (1), in particular DC-link circuit, has a high side DC voltage level, an input and an output, the electronic circuit comprising a DC-link capacitor (4), an inrush circuit (3), for limiting an input current to a predetermined level, connected between a supply line (6) of the DC-link capacitor and the input. The inrush circuit includes a charge resistor element (Rc), a switch element (9), connected in parallel with the charge resistor element, and a control (7, 8) controlling the switch element. The control is adapted to turn the switch element on when the input current falls below a predetermined current level. The control includes a trigger control element (8) adapted to detect a differential voltage across the switch element and to turn the switch element off when the detected differential voltage rises above a predetermined threshold voltage. A method is provided for operating the electronic circuit (1).

公开(公告)号：US10432078B2

公开(公告)日：2019-10-01

申请号：US15321611

申请日：2015-06-15

Applicant: Grundfos Holding A/S

Inventor： Flemming Buus Bendixen ,  Frank Gravers Pedersen ,  Peter Valler ,  Henrik Rasmussen ,  Allan Ivo Søegaard

IPC: H02K49/10 ,  F04D13/02 ,  F04D13/06 ,  F04D25/02 ,  F04D25/06 ,  F04D29/22 ,  F04D29/28

Abstract: The present invention relates to a magnetic gear comprising a first magnetic rotor with a first shaft; and a second magnetic rotor with a second shaft; a support structure, with a first end shield and a second end shield connected by a stat or support element. A first bearing attached to the first end shield supports the first shaft and a second bearing supports the second shaft. The first and second magnetic rotors are displaced in axial direction from each other in an axial gap; and the first shaft and shaft are approximately aligned in opposite axial directions; and a plurality of magnetic flux conductors encircles the first and second magnetic rotors, thereby conducting magnetic flux from the first magnetic rotor to the second magnetic rotor. The magnetic gear comprises a dividing wall arranged in the axial gap between the first magnetic rotor and the magnetic second rotor, to separate a first chamber from a second chamber.

公开(公告)号：US20190293073A1

公开(公告)日：2019-09-26

申请号：US16361525

申请日：2019-03-22

Applicant: GRUNDFOS HOLDING A/S

Inventor： Gert Friis ERIKSEN ,  Jens Kjær MILTHERS

IPC: F04D13/06 ,  F04D13/16 ,  F04D29/00

Abstract: A pump assembly includes an electrical drive motor (2) and an impeller which is connected to the drive motor (2) via a shaft (14). The shaft extends between the drive motor (2) and the impeller, through a seal arrangement with a fluid reservoir (22). A method is provided for detecting a concentration change in a fluid reservoir in the seal arrangement in the pump assembly. A concentration sensor (30) detects a concentration change in the fluid reservoir (22), and a second sensor (32) detects at least one further parameter of the fluid reservoir (22). The sensors are arranged on the fluid reservoir (22). The sensors are connected to an evaluation device (22). The evaluation device (34) is configured to carry out an evaluation of at least one reading of the concentration sensor (30), taking into account at least one reading which is detected by the second sensor (32).

公开(公告)号：US10337516B2

公开(公告)日：2019-07-02

申请号：US14892774

申请日：2014-04-29

Applicant: GRUNDFOS HOLDING A/S

Inventor： Bjarne Vinther Toft ,  Aage Bruhn

IPC: F04D1/10 ,  F04D1/06 ,  F04D9/00 ,  F04D9/02 ,  F04D13/06 ,  F04D15/00 ,  F04D29/043 ,  F04D29/22 ,  F04D29/42 ,  F04D29/44 ,  F04D29/70

Abstract: A multi-stage, self-priming centrifugal pump assembly includes at least two pump stages (4) which are consecutive in a main flow direction (32), and a backflow channel (13) which lies parallel to at least one a pump stage (4). The backflow channel (13) runs out downstream of the first or a further pump stage (4), in the main flow direction (32).

公开(公告)号：US20190074773A1

公开(公告)日：2019-03-07

申请号：US16083232

申请日：2017-03-08

Applicant: GRUNDFOS HOLDING A/S

Inventor： Juan Carlos HERNANDEZ BOTELLA ,  Lars Press PETERSEN

IPC: H02M3/158

CPC classification number: H02M3/1588 ,  H02M2001/0009 ,  H02M2001/0058 ,  H02M2001/0064 ,  Y02B70/1466 ,  Y02B70/1491

Abstract: A control method controls a power converter circuit. The power converter circuit includes at least one inductive element (L) storing an output energy, a charging switch (C) for charging the inductive element (L), a releasing switch (R) for releasing the stored output energy from the inductive element (L) and for charging the inductive element (L) with a compensation energy and an output capacitor (Cout) saving the released output energy. The compensation energy is used to achieve Minimized Voltage Switching (MVS) condition when switching on the charging switch (C). A turn on time (te, tdis) of the releasing switch is adjusted by a closed-loop control of a compensation control variable (Vaux)) measured in the power converter circuit or of a characteristic value (Vsample) derived from this compensation control variable (Vaux)), and a respective power converter circuit.

公开(公告)号：US10184812B2

公开(公告)日：2019-01-22

申请号：US15533183

申请日：2015-08-28

Applicant: Grundfos Holding A/S

Inventor： Kjeld Winther Jacobsen ,  John B. Jacobsen ,  Mikkel Haugaard

IPC: G01D11/00 ,  G01D11/24 ,  G12B9/04

Abstract: A sensor arrangement includes at least one sensor (7) as well as a housing (1) constructed of at least two plastic injection molded parts (2, 3), and a sensor electronics which are located on the circuit board (5) and which is secured by this housing. At least one absorption body (4) is provided within the housing (1) and is designed as a plastic injection molded part and serves for absorbing fluid which could get into the housing by diffusion.

公开(公告)号：USD837832S1

公开(公告)日：2019-01-08

申请号：US29561208

申请日：2016-04-14

Applicant: GRUNDFOS HOLDING A/S

Designer： Morten Sofussen

公开(公告)号：US20180363659A1

公开(公告)日：2018-12-20

申请号：US16060215

申请日：2016-12-07

Applicant: GRUNDFOS HOLDING A/S

Inventor： Steen MIKKELSEN ,  Niels DUE JENSEN ,  Brian LUNDSTED POULSEN

IPC: F04D1/06 ,  F04D29/42 ,  F04D29/62

Abstract: A multistage centrifugal pump with a foot part (2) and with a head part (9), between which pump stages are integrated. The head part (9) and the foot part (2) are connected via tie-rods (11) which with one end are fastened on the head part (9) and with the other end are fastened on the foot part (2). The tie-rods (11) at one end comprise a thread (14), with which they are tightened on the head part (9). The tie-rods (11) are formed from sheet metal and at the other end comprise a recess (16), with which recess they are positively fixed on the foot part (2), at least one the tensile direction 22

公开(公告)号：USD833483S1

公开(公告)日：2018-11-13

申请号：US29561216

申请日：2016-04-14

Applicant: GRUNDFOS HOLDING A/S

Designer： Morten Sofussen