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公开(公告)号：US11909258B2
公开(公告)日：2024-02-20
申请号：US17655474
申请日：2022-03-18
发明人： Kenneth A. Colby, Jr. , Wei-Hsiang Lin , Venkatraman Chennakesavan , Eyob Demissie , Luka Petrovic , Himamshu V Prasad , Yu Zhang
CPC分类号： H02J9/062 , H01H47/002 , H02M5/42
摘要： Power supplies and methods of use thereof are provided, where a power supply includes an input configured to receive input AC power an output configured to provide output AC power to a load, at least one power converter coupled to the input and configured to convert the input AC power into the output AC power, a controller coupled the at least one power converter. The controller is configured to adjust at least one parameter of the output AC power provided by the at least one power converter, detect, in response to adjusting the at least one parameter of the output AC power, at least one of an adjusted input AC power or an adjusted output AC power, and determine that a fault has occurred based on the at least one of the adjusted input AC power or the adjusted output AC power.
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公开(公告)号：US11811333B2
公开(公告)日：2023-11-07
申请号：US18128052
申请日：2023-03-29
发明人： Kenichi Sakakibara
摘要： A power converter includes a converter circuit, an inverter circuit, a clamp circuit, a scrubber circuit, and an element including a resistive component. The converter circuit generates from an AC voltage source a DC voltage with AC components superimposed. The inverter circuit has an input connected with an output of the converter circuit. The inverter circuit is configured to convert the DC voltage into an AC voltage by switching, and output the AC voltage to an inductive load. The clamp circuit includes a first capacitor and a first diode connected in series. The clamp circuit is connected between a positive output and a negative output of the converter circuit. The snubber circuit includes a second capacitor and a second diode connected in series. The snubber circuit is connected between the positive output and the negative output of the converter circuit.
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公开(公告)号：US11476775B2
公开(公告)日：2022-10-18
申请号：US17354485
申请日：2021-06-22
发明人： Albrecht Gensior
摘要： The present disclosure relates to a method for controlling a converter, in particular power converter of a wind power installation. The converter has a plurality of, preferably parallel, converter modules. The method includes the following steps: driving a first converter module, such that the converter module generates a first electrical AC current in a first switch position, driving a second converter module, such that the converter module generates a second electrical AC current in a second switch position, superposing the first electrical AC current and the second electrical AC current to form a total current, detecting the total current of the converter, determining a virtual current depending on the first and second switch positions, and changing the first switch position of the first converter module and/or the second switch position of the second converter module depending on the total current and the virtual current.
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公开(公告)号：US20220302747A1
公开(公告)日：2022-09-22
申请号：US17655474
申请日：2022-03-18
发明人： Kenneth A. Colby, JR. , Wei-Hsiang Lin , Venkatraman Chennakesavan , Eyob Demissie , Luka Petrovic , Himamshu V Prasad , Yu Zhang
摘要： Power supplies and methods of use thereof are provided, where a power supply includes an input configured to receive input AC power an output configured to provide output AC power to a load, at least one power converter coupled to the input and configured to convert the input AC power into the output AC power, a controller coupled the at least one power converter. The controller is configured to adjust at least one parameter of the output AC power provided by the at least one power converter, detect, in response to adjusting the at least one parameter of the output AC power, at least one of an adjusted input AC power or an adjusted output AC power, and determine that a fault has occurred based on the at least one of the adjusted input AC power or the adjusted output AC power.
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公开(公告)号：US11362596B2
公开(公告)日：2022-06-14
申请号：US17194764
申请日：2021-03-08
发明人： Josef Schmidt , Matthias Hauck , Jochen Weber
IPC分类号： H02M5/42 , H02M7/00 , H02M5/458 , H02J7/00 , H02P21/22 , H02M3/335 , H02P27/08 , H02M3/158 , H02M1/00
摘要： In a system and method for operating a system having a rectifier which is suppliable from an electric AC-voltage supply network, an inverter which feeds an electric motor, and a DC/DC converter which is connected to an energy accumulator, the DC-voltage side connection of the inverter is connected to the DC-voltage side connection of the rectifier, in particular, the electric motor is supplied from the AC-voltage side connection of the inverter, a first DC-voltage side connection of the DC/DC converter is connected to the DC-voltage side connection of the rectifier, in particular, the DC-voltage side connection of the inverter and the first DC-voltage side connection of the DC/DC converter are connected in parallel, the DC/DC converter has a housing in which a device for current acquisition is situated, which acquires either the current, in particular network phase currents, flowing into the rectifier at the AC-voltage side connection of the rectifier, or the current emerging from the rectifier at the DC-voltage side connection of the rectifier, and the acquired value is forwarded to a signal electronics situated in the housing of the DC/DC converter, which generates control signals for semiconductor switches of the DC/DC converter.
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公开(公告)号：US11303149B2
公开(公告)日：2022-04-12
申请号：US16780513
申请日：2020-02-03
发明人： Daniel Gonzalez
摘要： Systems, methods, and computer-readable mediums include detecting and eliminating a three-phase without neutral short-circuit in a load supplied by a power converter. After detecting the short circuit, the current at an output conductor for one of the three-phases is stopped and then resumed after a sufficient amount of current causes a downstream protection device of the faulty load to trip.
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公开(公告)号：US11251722B2
公开(公告)日：2022-02-15
申请号：US16754010
申请日：2018-10-05
摘要： A converter scheme (30) comprises a plurality of poles and a plurality of converters (32), the plurality of poles (60,62,64) including at least one positive pole (60), at least one negative pole (62) and a neutral pole (64), the plurality of converters (32) including at least one first converter (32a) and at least one second converter (32b), the or each first converter (32a) connected to the neutral pole (64) and the or the respective positive pole (60), the or each first converter (32a) operable to control a converter voltage across the neutral pole (64) and the corresponding positive pole (60), the or each second converter (32b) connected to the neutral pole (64) and the or the respective negative pole (62), the or each second converter (32b) operable to control a converter voltage across the neutral pole (64) and the corresponding negative pole (62), wherein the converter scheme (30) includes a controller (36) programmed to perform a voltage control mode when there is an imbalance between power or current levels of the positive and negative poles (60,62) and when the neutral pole (64) is at a non-zero potential, the controller (36) programmed to perform the voltage control mode to operate each converter (32a,32b) to control the corresponding converter voltage so that a pole-to-ground voltage of the corresponding positive or negative pole (60,62) is equal to or lower than a voltage rating of the corresponding positive or negative pole (60,62).
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公开(公告)号：US20210391724A1
公开(公告)日：2021-12-16
申请号：US17334830
申请日：2021-05-31
发明人： Tao XIA , Hong LIU , Cheng LU , SHENG-HUA LI
摘要： A three-phase power supply system includes three phase branches forming a delta connection. Each of the phase branches includes at least one power conversion cell of at least two stages. The at least one power conversion cell of each of the phase branches is connected in parallel to the at least one power conversion cell of the respective other two phase branches. When one of the phase branches stops operating, the other two phase branches keep operating, and three phase current of the three-phase power supply system can be balanced by regulating active powers and reactive powers of the other two phase branches. Through the invention, when one of the phase branches stops operating, the other two phase branches may keep operating, and three phase current of the three-phase power supply system are balanced.
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公开(公告)号：US11038368B2
公开(公告)日：2021-06-15
申请号：US16726766
申请日：2019-12-24
发明人： Zhongwei Sun , Shiji Wu , Zhiyuan Zhong , Xuhe Liu
摘要： A method of controlling power supply of a caravan including a photovoltaic plate includes: receiving a first power parameter of an input interface element; determining whether there is a mains supply to be input into the input interface element according to the first power parameter; turning on a first switch to make the input interface element be electrically connected to the output interface element if the mains supply is input into the input interface element; receiving a power parameter of a battery pack if the mains supply is not input into the input interface element; determining whether a remaining power of the battery pack exceeds a power threshold according to the power parameter of the battery pack; and making the battery pack be electrically connected to an output interface element if the remaining power of the battery pack exceeds the power threshold.
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公开(公告)号：US10959359B2
公开(公告)日：2021-03-23
申请号：US16624004
申请日：2017-06-30
摘要： A power conversion device includes a first stage, a second stage, a first electric field relaxation shield unit, a second electric field relaxation shield unit, and a plurality of stage posts. The first electric field relaxation shield unit is arranged to surround outer periphery of the first stage. The second electric field relaxation shield unit is arranged to surround outer periphery of the second stage. The plurality of stage posts connect the first stage and the second stage. The plurality of stage posts have outer peripheral surfaces formed of insulating bodies. Power conversion units loaded on the first stage are arranged inside a columnar region which includes at least some of the plurality of stage posts as sides.
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