-
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
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
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
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
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.
-
Patent Agency Ranking
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
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
Inventor： James Miller , Montie Roland , Kevin Stewart , Ryan Drabek , George Miller , Shawn Rink , Marvin Garcia
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.
-
公开(公告)号：US10731655B2
公开(公告)日：2020-08-04
申请号：US14877817
申请日：2015-10-07
Inventor： Robert W. Stiles, Jr. , Lars Hoffmann Berthelsen , Gert Kjaer , Florin Lungeanu
Abstract: Embodiments of the invention provide a pumping system for at least one aquatic application. The pumping system includes a pump, a motor coupled to the pump, and a controller in communication with the motor. The controller receives input of a performance value that is determined utilizing information from operation of the motor and compares the performance value to a reference value. The controller also is configured to prime and run the pump when the performance value equals the first reference value and to continue to do so until the performance value equals a second reference value. Alternatively, the controller receives user input of an amount of time the system can take to attempt to successfully prime the pump and is configured to operate the motor at maximum speed until the amount of time elapses.
-
公开(公告)号：US20200014309A1
公开(公告)日：2020-01-09
申请号：US16451211
申请日：2019-06-25
Applicant: Danfoss Power Electronics A/S
Inventor： Henning Markus Mortensen , Carsten R. Hansen
Abstract: A power electronic device comprising a grid side (L1, L2, L3) connected to a capacitor bank (2) is described, the capacitor bank (2) being connected to ground via a switch. Such power electronic device should be used in different types of grid with low costs. To this end a varistor (5) is connected in parallel to the switch.
-
公开(公告)号：US10527042B2
公开(公告)日：2020-01-07
申请号：US14680947
申请日：2015-04-07
Inventor： Robert W. Stiles, Jr. , Lars Hoffmann Berthelsen , Ronald B. Robol , Christopher Yahnker , Daniel J. Hruby , Kevin Murphy , Einar Kjartan Runarsson , Arne Fink Hansen , Florin Lungeanu , Peter Westermann-Rasmussen
Abstract: A pumping system for moving water of a swimming pool includes a water pump, an infinitely variable speed motor, and an arrangement for operating the motor. In one example, the pumping system includes a memory configured to store a plurality of retained speed values, an arrangement for providing a plurality of retained speed values to the memory, and an arrangement for reading a selected one of the plurality of retained speed values from the memory. In addition or alternatively, the pumping system includes a storage medium for digitally storing a plurality of pre-established motor speed values and an arrangement for receiving input from a user to select one of the pre-established motor speeds. In addition or alternatively, the pumping system further includes an arrangement for restarting operation of the motor at a previously selected speed value when power supplied to the motor is interrupted during operation of the motor. A method for controlling the pumping system is also provided.
-
-
-
-
-
-
-
-
-
Search Results
93
records
(took 0.025 seconds)
