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公开(公告)号：US11611300B2
公开(公告)日：2023-03-21
申请号：US17443795
申请日：2021-07-27
发明人： Shao-Kai Tseng , Yi-Jan Chang , Sheng-Han Wu
IPC分类号： G05F1/70 , H02P21/14 , H02P21/22 , H02P27/06 , G01R15/20 , H02M1/00 , G01R19/00 , H02M7/5387
摘要： A current sensing correction method for a driving system is provided. Firstly, the detection values of a three-phase current are acquired through the measuring unit. When the three-phase current is maintained at the DC state, the DC values of the three-phase current are acquired and recorded as three-phase demagnetization values. When the detection values are zero, a d-axis current and a q-axis current are calculated according to the three-phase demagnetization values, a d-axis correction current command and a q-axis correction current command are calculated according to a proportional constant, the d-axis current and the q-axis current, and a three-phase demagnetization current is generated to the measuring unit according to the d-axis correction current command and the q-axis correction current command. When the demagnetization time reaches the first predetermined time, the three-phase demagnetization current is not generated.
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公开(公告)号：US11509254B2
公开(公告)日：2022-11-22
申请号：US16537808
申请日：2019-08-12
摘要： In a method for detecting a motor phase fault of a motor arrangement, the motor phases of which are connected to a drive circuit having a DC voltage intermediate circuit and an inverter. A motor phase voltage at at least one of the motor phases with respect to a reference potential is captured while the inverter is switched off; and a voltage profile of the captured motor phase voltage is used to determine whether there is a motor phase fault on one of the motor phases of the motor arrangement.
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公开(公告)号：US11489340B2
公开(公告)日：2022-11-01
申请号：US17059588
申请日：2019-05-02
发明人： Oliver Bitter , Ronny Fritsche , Thomas Hammer , Matthias Kuestermann , Thomas Manthe , Ralph Morgenstern , Georg Pilz
摘要： In order to create a full variable shunt reactor having two magnetically controllable high-voltage throttles which is compact and at the same time can also provide capacitive reactive power, auxiliary windings are used which are inductively coupled to the high-voltage throttles. The auxiliary windings are connected to at least one capacitively acting component.
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公开(公告)号：US11442483B2
公开(公告)日：2022-09-13
申请号：US15060944
申请日：2016-03-04
发明人： Jason W. Philhower
摘要： An illustrative example fuel cell power plant includes a cell stack assembly having a plurality of fuel cells configured to generate electricity based on an electrochemical reaction. The power plant includes a capacitor, a plurality of inverters, and at least one controller that is configured to control the plurality of inverters in a first mode and a second mode. The first mode includes the cell stack assembly associated with at least one of the inverters. A cell stack assembly and the associated inverter provide real power to a load external to the fuel cell power plant in the first mode. The second mode includes at least a second one of the inverters associated with the capacitor. The capacitor and the second one of the inverters selectively provide reactive power to or receive reactive power from a grid external to the fuel cell power plant in the second mode.
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公开(公告)号：US20220163990A1
公开(公告)日：2022-05-26
申请号：US17556598
申请日：2021-12-20
发明人： Santosh Sambamoorthy Veda , Robert Dean King , Irene Michelle Berry , Zhi Zhou , Matthew Christian Nielsen , Lembit Salasoo
IPC分类号： G05F1/66 , G06F1/26 , H02J3/00 , G05F1/70 , G06Q50/06 , H02J3/32 , H02J3/38 , H02J13/00 , H02J7/00 , H02J3/14 , H02J3/16
摘要： A system is provided having one or more charging stations that are electrically coupled with a power distribution grid and that may selectively couple with one or more energy storage devices; and a controller that may control transfer of electric power between the one or more charging stations, the one or more energy storage devices, and the power distribution grid. The controller may determine the amount of electric power transferred based at least in part on one or both of an assessment value.
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公开(公告)号：US11289908B2
公开(公告)日：2022-03-29
申请号：US16488359
申请日：2018-02-28
摘要： SOGI based apparatus and methods for providing balanced three phase output signals free of harmonics, DC components and imbalance present in the input signals, are disclosed. In addition, such apparatus and methods for providing corresponding output signals which are drift-free integrals of the input signals and which signals may enable the control of a power electronics inverter for improved and robust grid power injection and for motor control are disclosed.
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公开(公告)号：US11258353B2
公开(公告)日：2022-02-22
申请号：US16912848
申请日：2020-06-26
发明人： Yutaka Usami
摘要： According to one embodiment, there is provided a power converter including a totem-pole power factor correction circuit that can achieve reduction in recovery loss with a simple structure. A power converter according to an embodiment includes a totem-pole power factor correction circuit, a series connection of a first current detector and a second current detector, and a control circuit.
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公开(公告)号：US11226648B2
公开(公告)日：2022-01-18
申请号：US16882614
申请日：2020-05-25
发明人： Zhaofeng Wang , Xiaodong Huang , Chen Zhao
摘要： A power factor correction circuit includes a power meter configured to measure a total harmonic distortion (THD) at an input port; a switching-type regulator that is controllable by a switch control signal in order to adjust a power factor; and a controller configured to generate the switch control signal to control the switching-type regulator to perform power factor correction, where the controller adjusts an on-time of a main switch of the switching-type regulator based on the measured THD to decrease the THD.
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公开(公告)号：US20210391721A1
公开(公告)日：2021-12-16
申请号：US17282776
申请日：2018-12-10
发明人： Hiroki ISHIHARA , Miwako TANAKA
摘要： A management apparatus periodically transmits information for setting a first voltage range and a second voltage range smaller than the first voltage range to a distribution power supply apparatus. The distribution power supply apparatus removes, from an interconnection point voltage at an interconnection point with the distribution system, a voltage fluctuation component with a cycle shorter than a cycle in which the information is transmitted from the management apparatus to thereby generate a voltage command value of the interconnection point, and performs reactive power control for eliminating a voltage deviation of the interconnection point voltage with respect to the voltage command value. In the reactive power control, the generation of the reactive power is started when an absolute value of the voltage deviation exceeds the first voltage range, and the reactive power is adjusted until the absolute value falls below the second voltage range.
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公开(公告)号：US20210218246A1
公开(公告)日：2021-07-15
申请号：US17059588
申请日：2019-05-02
发明人： Oliver Bitter , Ronny Fritsche , Thomas Hammer , Matthias Kuestermann , Thomas Manthe , Ralph Morgenstern , Georg Pilz
摘要： In order to create a full variable shunt reactor having two magnetically controllable high-voltage throttles which is compact and at the same time can also provide capacitive reactive power, auxiliary windings are used which are inductively coupled to the high-voltage throttles. The auxiliary windings are connected to at least one capacitively acting component.
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