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公开(公告)号：USD1020658S1
公开(公告)日：2024-04-02
申请号：US29785577
申请日：2021-05-26
Applicant: Danfoss Power Electronics A/S
Designer： Lasse Aro , Dainius Stasiunas
Abstract: FIG. 1 is a front, left side and top perspective view of a control cabinet comprising a new, original and ornamental design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left view thereof;
FIG. 5 is a right view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a front, left side and top perspective view of a control cabinet in accordance with a second embodiment;
FIG. 9 is a front view thereof;
FIG. 10 is a rear view thereof;
FIG. 11 is a left view thereof;
FIG. 12 is a right view thereof;
FIG. 13 is a top view thereof; and,
FIG. 14 is a bottom view thereof.-
62.发明公开公开(公告)号：US20230198441A1
公开(公告)日：2023-06-22
申请号：US18067880
申请日：2022-12-19
Applicant: Danfoss Power Electronics A/S
Inventor： Daniel Andersen , Jörg Dannehl , Virgil Ioan Lupu
IPC: H02P23/04
CPC classification number: H02P23/04
Abstract: The present invention is directed at a method for operating rotating machinery, such as an electric motor, by means of a variable speed drive (VSD). The variable speed drive is provided for identifying mechanical resonance points by means of a sensor and corresponding speeds of the machinery; storing the speeds at which the identified mechanical resonance points occur; and bypassing the speeds at which the identified mechanical resonance points occur during operation of the rotating machinery. The invention is also directed at a variable speed drive for performing said method.
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公开(公告)号：US20230194630A1
公开(公告)日：2023-06-22
申请号：US18067862
申请日：2022-12-19
Applicant: Danfoss Power Electronics A/S
Inventor： Lucian Asiminoaei , Luzia Almeida , Jörg Dannehl , Sanjeet Kumar Dwivedi , Norbert Hanigovszki
CPC classification number: G01R31/64 , G01R23/15 , H03H7/0115
Abstract: The present invention is directed at a method for evaluating the degradation level of capacitors of a power filter connected to an adjustable speed drive (ASD) or a power converter. The invention is also directed at an adjustable speed drive and a power converter provided for performing the method.
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64.发明授权公开(公告)号：US11611286B2
公开(公告)日：2023-03-21
申请号：US16935474
申请日：2020-07-22
Applicant: Danfoss Power Electronics A/S
Inventor： Henrik Rosendal Andersen
Abstract: A method for determining rectifier-stage output current and/or grid-side currents (iu, iv, iw) of a frequency converter (1) having a passive rectifier (3), an inverter (4), a DC-link with a DC-link inductor (Ldc) and a DC-link capacitor (Cdc) between the rectification stage (3) and the inverter stage (4) is described. In a frequency converter the current information for the grid-side currents (iu, iv, iw) should be obtained without a current sensor at the grid-side (2). To this end the method comprises the step of calculating a current in the DC-link (5) by using at least a voltage value (Urec) and characteristics of the rectifier (3) in the DC-link (5) and/or grid side currents to form a corrected current using the calculated current and a measured current or currents or a fraction of a measured current or currents, or a fraction of a measured current or currents.
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公开(公告)号：US20230018979A1
公开(公告)日：2023-01-19
申请号：US17861200
申请日：2022-07-09
Applicant: Danfoss Power Electronics A/S
Inventor： Steve Michael Meyer , Per Maersk Jørgensen
Abstract: The present disclosure refers to a method for controlling the speed of a reciprocating load motor, wherein the motor speed is a function of two input variables, namely a user defined speed set-point and a load dependent input variable. According to the disclosure, the load dependent input variable is a function of the motor current. The disclosure also refers to a variable frequency drive for controlling the speed of a reciprocating load motor, wherein the drive is programmed to perform the presently described method.
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Patent Agency Ranking
公开(公告)号：US11522467B2
公开(公告)日：2022-12-06
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
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.
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公开(公告)号：US20220182005A1
公开(公告)日：2022-06-09
申请号：US17541512
申请日：2021-12-03
Applicant: Danfoss Power Electronics A/S
IPC: H02P29/024
Abstract: The present invention is directed at a pulse shift protection method for detecting a phase-to-phase short circuit in a drive for controlling electric motors, wherein the drive provides an output voltage to the electric motor, and wherein the instant, at which a short circuit detection function is executed, is chosen to minimize disturbance in the output voltage of the drive. The invention is also directed at a drive for controlling electric motors, said drive including a controlling portion for generating an output signal and an output portion connectable to an electric motor. The drive is provided for executing the above-mentioned pulse shift protection method.
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公开(公告)号：US11342868B2
公开(公告)日：2022-05-24
申请号：US16452805
申请日：2019-06-26
Applicant: Danfoss Power Electronics A/S
Inventor： Stefan Erb
Abstract: A method for identifying the magnetic anisotropy of an electric rotary field machine comprising a rotor and a stator is described, the method comprising the steps of setting injection pulses of equal absolute values during an injection interval, detecting a respective current response in form of current difference vectors, and determining the anisotropy from the voltage vectors and current difference vectors. Such a method should allow identifying of magnetic anisotropy in a simple way. To this end, injection pulses in the three-phase domain are used.
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公开(公告)号：US20210351701A1
公开(公告)日：2021-11-11
申请号：US17282841
申请日：2019-04-10
Applicant: Danfoss Power Electronics A/S
Inventor： Nicklas Södö , Juha Norrena
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).
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公开(公告)号：US11073155B2
公开(公告)日：2021-07-27
申请号：US15939715
申请日：2018-03-29
Inventor： Robert W. Stiles, Jr. , Lars Hoffmann Berthelsen , Ronald B. Robol , Christopher R. Yahnker , Einar Kjartan Runarsson
Abstract: A method of operating a pumping system for an aquatic application based upon performance of multiple water operations is disclosed. The method includes providing a pump and a motor coupled to the pump, and a controller including a variable speed drive that is in communication with the motor. The method also includes: operating the motor in accordance with a first water operation, wherein the first water operation includes a first start time, end time, and water flow rate; operating the motor in accordance with a second water operation, wherein the second water operation includes a second start time, end time, and water flow rate; and altering the first water operation in response to performance of the second water operation.
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