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公开(公告)号：US20190234663A1
公开(公告)日：2019-08-01
申请号：US16318761
申请日：2017-07-18
申请人： Eppendorf AG
发明人： Rüdiger Uhlendorf , Gary Poole , George Mason , Ted Kao
CPC分类号： F25B49/022 , F25B7/00 , F25B49/025 , F25B2700/2104 , H02M5/44 , H02M5/458 , H02P1/426 , H02P1/44 , H02P27/047
摘要： The invention relates to a control apparatus for a refrigerator compressor having at least one two-phase AC asynchronous motor (K1, K2), having mains connection means (10) for connection to a preferably public voltage supply network Which nominally provides a mains AC voltage of between 85 V and 264 V, in particular between 100 V and 230 V, first voltage converter means (14) which are connected downstream of the mains connection means and are intended to generate an intermediate voltage, in particular an intermediate DC voltage, from the mains AC voltage, second voltage converter means (16-1, 16-2) which are connected downstream of the first voltage converter means and are intended to generate an output signal which is independent of a level and a mains frequency of the mains AC voltage, in particular has a constant voltage and/or frequency in periods, and is intended to control the refrigerator compressor with an AC voltage of a plurality of differently predefinable voltage levels, wherein the mains connection means are assigned voltage detector means (12) for capturing the mains AC voltage, the detector output signal from which can be evaluated by the second voltage converter means or control means (24) assigned to the latter for the purpose of generating a mains-voltage-dependent maximum value for a current of the output signal.
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公开(公告)号：US10352302B2
公开(公告)日：2019-07-16
申请号：US15138555
申请日：2016-04-26
发明人： Motofumi Tanaka , Naohiko Shimura , Toshiki Osako
摘要： An airflow generator power supply of an embodiment supplies alternating-current voltage to a plurality of airflow generators on a blade of a wind turbine generator. The power supply has a frequency converter, a plurality of transformers, and a switch. The frequency converter generates alternating-current voltage. Each transformer amplifies the alternating-current voltage and applies the amplified voltage to the corresponding airflow generator. The switch outputs the alternating-current voltage from the frequency converter to one selected from the transformers.
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公开(公告)号：US20190089266A1
公开(公告)日：2019-03-21
申请号：US16082323
申请日：2016-04-28
发明人： Kenji IWAZAKI , Koichi ARISAWA , Yosuke SHINOMOTO
摘要： In a power converter, modules are electrically interconnected by a busbar and joint members. Each joint member has a connecting portion formed on one side and a connecting portion formed on the other side, with respect to a bisector bisecting the width. The busbar has a connecting portion on one side with respect to a bisector bisecting the width. For a 200 V power supply specification, one end of each of two busbars is fixed to one joint member. For a 400 V power supply specification, one end of one busbar is fixed to one joint member.
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公开(公告)号：US10110140B1
公开(公告)日：2018-10-23
申请号：US15595896
申请日：2017-05-15
申请人： James Nanut
发明人： James Nanut
摘要： According to one embodiment, a power converter circuit includes a resonant circuit coupled to an alternating current (AC) voltage source to convert a first AC voltage to a first AC current and an AC to direct current (AC/DC) converter coupled to the resonant circuit, where the AC/DC converter is to convert the AC current to a DC current. The power converter circuit further includes an inverter coupled to the AC/DC converter to convert the DC current to a second AC current, an AC filtering circuit coupled to an output of the inverter, and a load coupled to the output of the inverter to convert the second AC current to a second AC voltage.
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公开(公告)号：US20180062531A1
公开(公告)日：2018-03-01
申请号：US15804713
申请日：2017-11-06
申请人： ABB Schweiz AG
发明人： Peter Al-Hokayem
IPC分类号： H02M5/44
CPC分类号： H02M5/44 , H02M1/12 , H02M5/4585 , H02M2001/0048 , H02M2001/0067 , H02P23/0004
摘要： An electrical converter comprises at least one of an active rectifier and an inverter interconnecting an electrical source with an electrical load. A method for controlling an electrical converter comprises: receiving at least one estimated control variable, which is estimated from measurement values measured in the electrical converter; receiving at least one outer loop control variable provided by an outer control loop, the at least one outer loop control variable providing a desired steady-state operation point of the electrical converter; determining a control region based on a control error, which is a difference between the at least one estimated control variable and the at least one outer loop control variable, wherein the control region is defined by one or more intervals of one or more control variables; selecting control parameters based on the control region, wherein, when the control error is in an inner control region, first control parameters are selected, and, when the control error is outside the inner control region but inside an outer control region, second control parameters are selected; switching, based on the control error, between two and more control methods, which differ in control parameters, by predicting at least one reference control value based on a solution of a physical model of the electrical converter, which comprises the selected control parameters, the physical model being based on differential equations modelling the at least one estimated control variable and the solution being based on a constraint minimizing a difference between the at least one estimated control variable and the at least one outer loop control variable; and determining switching states of the electrical converter based on the reference control value.
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公开(公告)号：US09882503B2
公开(公告)日：2018-01-30
申请号：US15443365
申请日：2017-02-27
申请人： ABB Technology Oy
CPC分类号： H02M5/44 , H02M7/483 , H02M7/487 , H02M2007/4835
摘要： A converter system comprises two phase modules, each phase module comprising a first converter leg and a second converter leg interconnected with a DC link, and a charging transformer for charging the DC link. The DC link comprises two capacitors connected in series between a positive point, a middle point and a negative point, each converter leg adapted for interconnecting an output with the positive point, the middle point or the negative point of the DC link. The phase modules are connected in series via outputs of the converter legs, such that a second converter leg of a lower phase module is connected with a first converter leg of a higher phase module. The charging transformer is connected to the middle point of the DC link of a highest phase module, which provides a phase output of the converter system with an output of a second converter leg. The converter system includes two converter phases, each converter phase comprising at least two series connected phase modules. At a star point of the converter phases the converter phases are star-connected via outputs of first converter legs of lowest converter modules, which are series connected with higher converter modules, whereby a module side start point of the charging transformer is connected or is not connected with the star point of the converter phases.
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公开(公告)号：US09837924B1
公开(公告)日：2017-12-05
申请号：US15171387
申请日：2016-06-02
摘要： Power conversion systems, methods and precharge systems are disclosed to charge a DC bus capacitor, including thyristors and reverse diodes coupled in AC circuit paths between AC input lines and a rectifier, a precharge resistor coupled in one or more of the AC circuit paths, and a controller to turn all the thyristors off to allow the DC bus capacitor to charge through the precharge resistor, and to turn all the thyristors on when the DC bus voltage reaches a non-zero threshold value.
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公开(公告)号：US09768705B1
公开(公告)日：2017-09-19
申请号：US15288484
申请日：2016-10-07
申请人： TSi Power Corp.
发明人： Pallab Midya , Robert S Schneider , Peter Nystrom
CPC分类号： H02M5/44 , H02M1/15 , H02M5/4585 , H02M2001/123
摘要： An AC power converter converts power from an AC power source to an AC load. A DC power holding source is coupled to an input half-bridge switch, a common half-bridge switch and an output half-bridge switch. A controller is coupled to the input half-bridge switch, the common half-bridge switch, and an output half-bridge switch to generate at least two control signals at a common switching frequency, wherein the controller generates the at least two control signals with a phase difference there between chosen to cause a ripple frequency in both the input low pass filter and the output low pass filter to be double the common switching frequency. An input low pass filter can eliminate switching frequency energy from entering the AC power source. An output low pass filter can eliminate switching frequency energy from entering the AC load.
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公开(公告)号：US09748856B2
公开(公告)日：2017-08-29
申请号：US14697410
申请日：2015-04-27
申请人： LSIS CO., LTD.
发明人： Young Woo Kim , Woong Hyub Song
CPC分类号： H02M5/44 , H02M1/126 , H02M7/19 , H02M7/49 , H02M2007/4835
摘要： Provided is a modular multi-level converter including a plurality of sub-modules including switching elements, a plurality of sub-control units respectively controlling the plurality of switching elements included in the plurality of sub-modules, and a central control unit which determines switching operation conditions of the plurality of sub-modules, and transmits control signals corresponding to the determined switching operation conditions to the plurality of sub-control units. Each of the plurality of sub-control units acquires state information on the sub-module controlled thereby and transmits the acquired state information to the central control unit.
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公开(公告)号：US20170170742A1
公开(公告)日：2017-06-15
申请号：US15443365
申请日：2017-02-27
申请人： ABB Technology Oy
IPC分类号： H02M5/44
CPC分类号： H02M5/44 , H02M7/483 , H02M7/487 , H02M2007/4835
摘要： A converter system comprises two phase modules, each phase module comprising a first converter leg and a second converter leg interconnected with a DC link, and a charging transformer for charging the DC link. The DC link comprises two capacitors connected in series between a positive point, a middle point and a negative point, each converter leg adapted for interconnecting an output with the positive point, the middle point or the negative point of the DC link. The phase modules are connected in series via outputs of the converter legs, such that a second converter leg of a lower phase module is connected with a first converter leg of a higher phase module. The charging transformer is connected to the middle point of the DC link of a highest phase module, which provides a phase output of the converter system with an output of a second converter leg. The converter system includes two converter phases, each converter phase comprising at least two series connected phase modules. At a star point of the converter phases the converter phases are star-connected via outputs of first converter legs of lowest converter modules, which are series connected with higher converter modules, whereby a module side start point of the charging transformer is connected or is not connected with the star point of the converter phases.
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