公开(公告)号：USD1066250S1

公开(公告)日：2025-03-11

申请号：US29907962

申请日：2024-01-10

Applicant: Danfoss Power Electronics A/S

Designer： Michael Sørensen

公开(公告)号：US20250030366A1

公开(公告)日：2025-01-23

申请号：US18774409

申请日：2024-07-16

Applicant: Danfoss Power Electronics A/S

Inventor： Ana-Mari Tataru Kjær ,  Lucian Asiminoaei

IPC: H02P23/14 ,  G01R31/34

Abstract: A method for estimating electrical parameters of an electric motor (205) and a power filter (203) connected to a power converter (201) including injecting an AC signal of different frequencies for a given time window in the power filter (203) and the motor (205), measuring a response signal of the power filter (203) and the motor (205) to the injected AC signal, determining a resonance frequency of the power filter (203) based on the measured response signal, calculating a ratio of leakage inductances of the power filter (203) and the motor (205).

公开(公告)号：US11837964B2

公开(公告)日：2023-12-05

申请号：US17282841

申请日：2019-04-10

Applicant: Danfoss Power Electronics A/S

Inventor： Nicklas Södö ,  Juha Norrena

IPC: H02M5/458 ,  H02M1/32 ,  H02M1/36 ,  G01R31/42 ,  G01R1/42

CPC classification number: H02M5/458 ,  H02M1/32 ,  H02M1/36 ,  G01R1/42

Abstract: A method for detecting low impedance condition at an output (15) of an electrical converter (10), a control unit (1000), a computer program product, and an electrical converter (10) are presented. The method includes determining (110) a first current value (I1(T1)) of a first current (I1), and a second current value (I1(T2)) of the first current (I1), and determining (120) a first current difference (ΔI1) between the first (I1(T1)) and the second (I1(T2)) current values, and comparing (130) the first current difference (ΔI1) to a first current difference threshold (I1_TH), and if the first current difference (ΔI1) is of predefined magnitude with respect to the first current difference threshold (I1_TH), such as higher, turning off (140) a first voltage (U1) driving the first current (I1), such as by switching off a corresponding switch or switches for applying the first voltage (U1) to the output (15).

公开(公告)号：US11749982B2

公开(公告)日：2023-09-05

申请号：US17206366

申请日：2021-03-19

Applicant: Danfoss Power Electronics A/S

Inventor： Per Knudsen ,  Ansgar Nielsen ,  Henrik Rosendal Andersen

IPC: H02P23/14 ,  H02P27/08 ,  H02H7/08

CPC classification number: H02H7/0844 ,  H02P23/14 ,  H02P27/085

Abstract: The present invention relates to a motor controller providing a dual-channel func-tional-safety (FS) safe-torque-off (STO) function when controlling a motor. The motor controller includes an inverter with low-side switches and high-side switches, a low-side gate drive connected to the low-side switches, a high-side gate drive connected to the high-side switches, a first functional-safety safe-torque-off circuit connected to the high-side gate drive and a second functional-safety safe-torque-off circuit connected to the low-side gate drive, and a non-reinforced high-voltage isolation barrier.

公开(公告)号：US20230261479A1

公开(公告)日：2023-08-17

申请号：US18167937

申请日：2023-02-13

Applicant: Danfoss Power Electronics A/S

Inventor： Oskari Leppäaho ,  Orges Gjini

IPC: H02J7/00 ,  H02M1/08

CPC classification number: H02J7/0016 ,  H02M1/08

Abstract: A voltage balancing circuit for capacitor banks or voltage cells connected in series. The circuit includes a DC-link with at least two capacitors or voltage cells connected in series and at least two emitter follower balancing circuits connected in parallel. At least one emitter resistor is provided between the emitter of each emitter follower balancing circuit and the mid-point of the DC-link. The gate emitter voltage applied to each emitter follower balancing circuit may be equal to its common gate voltage minus the voltage drop on the corresponding emitter resistor. The invention is also directed at a variable frequency drive for driving an electric motor or a power converter, having a corresponding voltage balancing circuit.

公开(公告)号：US20220231616A1

公开(公告)日：2022-07-21

申请号：US17711357

申请日：2022-04-01

Applicant: Danfoss Power Electronics A/S

Inventor： Leandro Della Flora ,  William Giewont ,  David Michaud ,  Dan Isaksson ,  Andreas Doktar

IPC: H02M7/487 ,  H02M1/32

Abstract: A circuit comprising a first power node for connection to a positive voltage of a DC link, a second power node for connection to a negative voltage of the DC link and a mid-point power node for connection to a mid-point voltage of the DC-link, the circuit further comprising a three-level neutral point clamped converter module and a brake resistor connection.

公开(公告)号：US20220192049A1

公开(公告)日：2022-06-16

申请号：US17543859

申请日：2021-12-07

Applicant: Danfoss Power Electronics A/S

Inventor： Stefan Schroeder

IPC: H05K7/20 ,  H02P29/024

Abstract: The present invention pertains to a heatsink arrangement for a power converter, wherein the heatsink is grounded via a grounding capacitor. The invention also pertains to a power converter for driving an electric motor, including a corresponding heatsink, semiconductor switches mounted on the heatsink and a fluid cooling system.

公开(公告)号：US11165332B2

公开(公告)日：2021-11-02

申请号：US16630033

申请日：2017-07-14

Applicant: Danfoss Power Electronics A/S

Inventor： Petar Ljushev

IPC: H02M1/32 ,  H02M1/36 ,  H02M5/45 ,  H02M5/458 ,  H02P27/06

Abstract: The invention provides an inverter system and a method of using said inverter system. A rectifier stage of the inverter system is used to charge a DC link stage to a first voltage level and a control module determines whether voltages over series connected capacitors of the DC link stage are balanced. If those voltages are balanced, the rectifier stage charges the DC link stage to a second voltage level higher than the first voltage level.

公开(公告)号：US20210305910A1

公开(公告)日：2021-09-30

申请号：US17213758

申请日：2021-03-26

Applicant: Danfoss Power Electronics A/S

Inventor： Finn Borup ,  Henning Markus Mortensen

IPC: H02M7/155 ,  H02P27/04

Abstract: The present invention relates to AC-DC conversion in power electronics. In particular, the present invention is directed at a thyristor rectifier, which may be employed in an electric motor drive. The rectifier includes three thyristors and three diodes, wherein the thyristors are connected to a positive rectifier output and the three diodes are connected to a negative rectifier output. The present invention also relates to an electric motor drive comprising a corresponding thyristor rectifier. In general, the present invention may be used in a frequency converter for an electric motor drive, but it can also be used in non-drive application.

公开(公告)号：US20210277915A1

公开(公告)日：2021-09-09

申请号：US17195225

申请日：2021-03-08

Applicant: Pentair Water Pool and Spa, Inc. ,  Danfoss Power Electronics A/S

Inventor： James Miller ,  Montie Roland ,  Kevin Stewart ,  Ryan Drabek ,  George Miller ,  Shawn Rink ,  Marvin Garcia

IPC: F04D29/58 ,  F04D13/14 ,  F04D29/42

Abstract: A fan shroud for a pump assembly having a pump, a motor and a drive. The fan shroud includes a fan shroud end cap coupled to a rear bell end of the motor, the fan shroud end cap having a vented surface for receiving cool air drawn by a motor fan during operation of the motor. The fan shroud further includes an extended shell sidewall extending from the fan shroud end cap across a length of the motor, and the fan shroud end cap and the extended shell sidewall are configured to surround the motor.