公开(公告)号：US10944348B2

公开(公告)日：2021-03-09

申请号：US16079635

申请日：2016-03-07

Applicant: Danfoss Power Electronics A/S

Inventor： Nicolas Trolle ,  Sanjeet Kumar Dwivedi

IPC: G01R15/00 ,  H02P23/14 ,  H02P21/16 ,  H02P27/06 ,  H02P21/14

Abstract: A method (400) of determining equivalent circuit parameters of a three phase induction motor is provided. The method (400) comprises applying (410) a current to a stator winding (362) of an induction motor (360), and varying (420) a voltage applied to the stator winding to regulate the applied current to be a constant current. Application of the current is terminated (430) when the applied voltage has reached a constant voltage. The equivalent circuit parameters are determined (440) from the value of the constant current, the values of the applied voltage, and a time period until the applied voltage attains the constant voltage. The method may provide values for a resistance (210) of the stator winding, a resistance (250) of a rotor winding (364), a magnetizing inductance (230), and a total inductance leakage value (220, 240) for the stator winding and the rotor winding.

公开(公告)号：US20210054846A1

公开(公告)日：2021-02-25

申请号：US16949656

申请日：2020-11-09

Applicant: PENTAIR WATER POOL AND SPA, INC. ,  DANFOSS POWER ELECTRONICS A/S

Inventor： Robert W. Stiles, JR. ,  Lars Hoffmann Berthelsen ,  Ronald B. Robol ,  Everett Cox ,  Donald Steen ,  Kevin Murphy ,  Daniel J. Hruby ,  Peter Westermann-Rasmussen ,  Gert Kjaer ,  Nils-Ole Harvest ,  Christopher Yahnker ,  Walter Woodcock ,  Einar Kjartan Runarsson ,  Arne Fink Hansen ,  Alberto Morando ,  Florin Lungeanu

IPC: F04D15/00

Abstract: A pumping system for at least one aquatic application. The pumping system includes a pump, a motor coupled to the pump, a filter coupled to the pump, and a controller in communication with the motor. The controller is configured to make a sensorless determination of a current value of a water flow rate based on an input power to the motor, drive the motor speed to maintain the water flow rate at a first constant value during a first time period, and drive the motor speed to maintain the water flow rate at a second constant value during a second time period.

公开(公告)号：US10447107B2

公开(公告)日：2019-10-15

申请号：US14907912

申请日：2014-06-12

Applicant: Danfoss Power Electronics A/S

Inventor： George Miller ,  Ryan Drabek ,  Lester Grzesik ,  Matthew Gray ,  Frank-Erik Johansen ,  Eric Von Stoutenborough

IPC: H02K5/20 ,  H02K5/10 ,  H02K9/02

Abstract: A cover for a motor drive is provided. The cover includes an opening (often at the bottom of the cover) to allow air to pass to an air inlet of the motor drive and an opening (often near the top of the cover) to allow air from an air outlet of the motor drive to exit the cover. A hood provides rain protection for the drive and a separator (such as a baffle) within the enclosure prevents air flowing within the enclosure from the air outlet to the air inlet of the drive. The hood and/or the separator are shaped to direct air from the air outlet away from the enclosure in order to substantially reduce the re-circulation of air from the air outlet to the air inlet of the drive.

公开(公告)号：US10359472B2

公开(公告)日：2019-07-23

申请号：US15322340

申请日：2014-07-08

Applicant: DANFOSS POWER ELECTRONICS A/S

Inventor： Nicolas Trolle ,  Sanjeet Kumar Dwivedi

IPC: G01R31/34 ,  H02P23/14

Abstract: An algorithm for identifying a motor type of a multi-phase (typically 3-phase) motor is described. The algorithm applies a series of active voltage vector pulses to the phases of the motor and measures the current rise-time for each applied voltage vector. The motor type is determined on the basis of the measured current rise-times.

公开(公告)号：US10122165B2

公开(公告)日：2018-11-06

申请号：US14916219

申请日：2014-09-29

Applicant: Danfoss Power Electronics A/S

Inventor： Firuz Zare

IPC: H02J3/00 ,  H02M1/42 ,  H02J3/01 ,  H02M1/12 ,  H02M5/458

Abstract: The present invention provides systems and methods for reducing harmonics, for example when using an AC to AC converter to drive a load such as a motor drive. In a first embodiment, a plurality of load driving circuits is provided, each drawing current from a 3-phase AC supply and driving an AC load, wherein each of said load driving circuit includes a 3-phase rectifier, with the rectifiers of the load driving circuits being controlled such that the rectification of the AC supply by the load driving circuits is staggered. In a second embodiment, a load driving circuit comprises an electronic inductor configured to control the DC link voltage and/or current such that the current drawn from the AC supply by the load driving circuit has a stepped profile. The first and second embodiments may be combined.

公开(公告)号：US09742260B2

公开(公告)日：2017-08-22

申请号：US14895298

申请日：2014-06-10

Applicant: Danfoss Power Electronics A/S

Inventor： Leandro Della Flora

IPC: H02M7/44 ,  H02M1/32 ,  H02J3/38 ,  H02J3/42 ,  H02M7/48

CPC classification number: H02M1/32 ,  H02J3/383 ,  H02J3/42 ,  H02M7/44 ,  H02M7/48 ,  Y02E10/563

Abstract: A method of initiating a grid-tied inverter is described, in which in-rush currents and DC overvoltage conditions are reduced or avoided. The method uses a pulse width modulator to drive the inverter under the control of a voltage feedforward signal such that the inverter output is dependent on the measured grid voltage. Then, an AC current feedback controller is enabled and the pulse width modulator is used to drive the inverter under the control of both the voltage feedforward control signal and the feedback control signal.

公开(公告)号：US20130099580A1

公开(公告)日：2013-04-25

申请号：US13702087

申请日：2011-06-09

Applicant: Uffe Borup ,  Frerk Haase

Inventor： Uffe Borup ,  Frerk Haase

IPC: H02J1/00

CPC classification number: H02J1/00 ,  H01L31/02021 ,  H02M7/493 ,  Y02E10/50 ,  Y10T307/707 ,  Y10T307/713

Abstract: The invention relates to an arrangement having at least one electric potential-varying device for varying the electric potential of at least one electrical device with respect to earth potential, and a plant room facility. In the operating state, the electric potential-varying device is disposed in the plant room facility.

Abstract translation: 本发明涉及一种具有至少一个电位变化装置的装置，用于改变至少一个电气装置相对于地电位的电势，以及一个植物室设施。 在操作状态下，将电位变化装置配置在车间内。

公开(公告)号：US20250117348A1

公开(公告)日：2025-04-10

申请号：US18904463

申请日：2024-10-02

Applicant: Danfoss Power Electronics A/S

Inventor： Carlo Nenna

IPC: G06F13/36

Abstract: A method for automatically assigning identifiers to controlled nodes of a fieldbus network, the controlled nodes comprising a plurality of electric motor drive systems, IO devices and/or feedback sensors, wherein the method includes the steps of setting the fieldbus network into a service mode; scanning the fieldbus network; decomposing the fieldbus network into linear branches and switches; scanning each linear branch; and assigning unique identifiers to the controlled nodes of the fieldbus network, wherein the identifiers include the relative positions of the controlled nodes in the fieldbus network and a node number. The disclosure is further directed at a fieldbus network including a plurality of controlled nodes, preferably electric motor drive systems, wherein the fieldbus network is provided for performing the method for automatically assigning identifiers.

公开(公告)号：US12015334B2

公开(公告)日：2024-06-18

申请号：US16695567

申请日：2019-11-26

Applicant: Danfoss Power Electronics A/S

Inventor： Ansgar Nielsen ,  Henrik Rosendal Andersen ,  Steen Hornsleth

IPC: H02M1/32 ,  H02M5/458

CPC classification number: H02M1/32 ,  H02M5/4585 ,  H02M1/327

Abstract: A power electronic device includes an input which is connected to an over-current-protection device arrangement and a DC-link, wherein the DC-link includes a series connection of at least two DC-link capacitors. In such a power electronic device the risk of a fire hazard should be minimized. To this end fault detecting element(s) are provided detecting an imbalance between the DC-link capacitors or an overload of at least one of the DC-link capacitors, wherein the fault detecting element(s) control maximum current inducing element(s) connected to the DC-link.

公开(公告)号：USD1021794S1

公开(公告)日：2024-04-09

申请号：US29738733

申请日：2020-06-19

Applicant: Danfoss Power Electronics A/S

Designer： Michael Sørensen

Abstract: The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.
FIG. 1 is a front, right side and top perspective view of a combined frequency converter and frequency converter panel in accordance with a first embodiment with no color claimed;
FIG. 2 is a front view thereof;
FIG. 3 is a back view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a left view thereof;
FIG. 7 is a right view thereof;
FIG. 8 is a front, right side and top perspective view of a combined frequency converter and frequency converter panel in accordance with a second embodiment having an element shown in color red;
FIG. 9 is a front view thereof;
FIG. 10 is a back view thereof;
FIG. 11 is a bottom view thereof;
FIG. 12 is a top view thereof;
FIG. 13 is a left view thereof;
FIG. 14 is a right view thereof;
FIG. 15 is a front, right side and top perspective view of a combined frequency converter and frequency converter panel in accordance with a third embodiment having an element shown in color red;
FIG. 16 is a front view thereof;
FIG. 17 is a back view thereof;
FIG. 18 is a bottom view thereof;
FIG. 19 is a top view thereof;
FIG. 20 is a left view thereof;
FIG. 21 is a right view thereof;
FIG. 22 is a front, right side and top perspective view of a combined frequency converter and frequency converter panel in accordance with a fourth embodiment having an element shown in color red;
FIG. 23 is a front view thereof;
FIG. 24 is a back view thereof;
FIG. 25 is a bottom view thereof;
FIG. 26 is a top view thereof;
FIG. 27 is a left view thereof; and,
FIG. 28 is a right view thereof.