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公开(公告)号：US11290026B2
公开(公告)日：2022-03-29
申请号：US16658911
申请日：2019-10-21
Applicant: ABB Schweiz AG
Inventor： Sandeep Bala , Arun Kumar Kadavelugu
Abstract: A converter system includes a DC bus for each phase of an input AC power signal; a first switching cell for each phase, including first two active switches coupled in series across the DC bus and forming a first switching cell AC pole therebetween, the first switching cell AC pole being coupled to a respective phase; and a second switching cell for each phase, including second two active switches coupled in series across the DC bus and forming a second switching cell AC pole therebetween. The second switching cell AC poles are coupled to each other to form a flying neutral. One of the first switching cell and the second switching cell switches at a frequency at least an order of magnitude greater than the line frequency. The other of the first switching cell and the second switching cell switches at a frequency approximately equal to the line frequency.
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公开(公告)号：US11258264B2
公开(公告)日：2022-02-22
申请号：US15989667
申请日：2018-05-25
Applicant: ABB Schweiz AG
Inventor： Zhiguo Pan , Sandeep Bala , Liming Liu , Yuxiang Shi
Abstract: Unique systems, methods, techniques and apparatuses of photovoltaic (PV) string power systems are disclosed. One exemplary embodiment is a PV power system comprising a plurality of PV strings and a floating DC-DC optimizer. The floating DC-DC optimizer comprises a first DC bus rail, a second DC bus rail, a plurality of input legs, each leg being coupled across the first DC bus rail and second DC bus rail, including two input leg semiconductor switches coupled at an input terminal, each input terminal being structured to receive an input current from an end of one PV string of the plurality of PV strings, and an output leg including two output leg semiconductor devices coupled at an output terminal.
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公开(公告)号：US10811975B1
公开(公告)日：2020-10-20
申请号：US16388857
申请日：2019-04-18
Applicant: ABB Schweiz AG
Inventor： Sandeep Bala , Jing Xu
Abstract: In at least one illustrative embodiment, a three-stage power converter includes a rectifier having an input to receive three-phase alternating-current (AC) and an output coupled to a first direct-current (DC) bus, a buck converter having an input coupled to the first DC bus and an output coupled to a second DC bus, and an LLC resonant converter having an input coupled to the second DC bus and an output to provide a DC charging current to a battery. The buck converter may be operable across a range of duty cycles to adjust a voltage level supplied to the second DC bus, and the LLC resonant converter may be operable in a plurality of modes to provide a plurality of discrete gain levels.
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公开(公告)号：US10014781B2
公开(公告)日：2018-07-03
申请号：US15226664
申请日：2016-08-02
Applicant: ABB Schweiz AG
Inventor： Sandeep Bala , Eddy Aeloiza , Arun Kadavelugu
CPC classification number: H02M3/24 , H02M1/08 , H02M3/22 , H02M3/337 , H02M7/08 , H02M2001/0064 , H02M2001/0077 , H03K17/691 , H03K2217/0081
Abstract: Unique systems, methods, techniques and apparatuses of a gate drive system are disclosed. One exemplary embodiment is a drive circuit electrically coupled to a main switching device including a first inverter, a first inverter controller, an air core transformer, at least one rectifier, at least two smoothing capacitors, a current buffer stage, and a detection circuit. The first inverter controller is structured to operate the first inverter in a first mode and a second mode. The air core transformer is structured to receive the converted AC power from the first inverter. The detection circuit is structured to detect a first mode of the first inverter and a second mode of the first inverter, and operate the current buffer stage based on a detected first mode of the inverter and a detected second mode of the first inverter.
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公开(公告)号：US20190149053A1
公开(公告)日：2019-05-16
申请号：US15814465
申请日：2017-11-16
Applicant: ABB Schweiz AG
Inventor： Sandeep Bala
Abstract: Unique systems, methods, techniques and apparatuses of an exemplary power converter are disclosed. One exemplary embodiment is a power converter comprising a power cell and a transformer. The power cell including a first and second DC input terminal, a first leg including a first and second switching device coupled and a first AC output terminal, a second leg including a third and fourth switching device and a second AC output terminal. The first and second AC output terminals are coupled to the AC power source and structured to receive an AC power from the AC power source. The transformer includes a primary winding, the primary winding being coupled across the first AC output terminal and the second AC output terminal.
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Patent Agency Ranking
公开(公告)号：US20180041127A1
公开(公告)日：2018-02-08
申请号：US15226664
申请日：2016-08-02
Applicant: ABB Schweiz AG
Inventor： Sandeep Bala , Eddy Aeloiza , Arun Kadavelugu
IPC: H02M3/24
CPC classification number: H02M3/24 , H02M1/08 , H02M3/22 , H02M3/337 , H02M7/08 , H02M2001/0064 , H02M2001/0077 , H03K17/691 , H03K2217/0081
Abstract: Unique systems, methods, techniques and apparatuses of a gate drive system are disclosed. One exemplary embodiment is a drive circuit electrically coupled to a main switching device comprising a first inverter, a first inverter controller, an air core transformer, at least one rectifier, at least two smoothing capacitors, a current buffer stage, and a detection circuit. The first inverter controller is structured to operate the first inverter in a first mode and a second mode. The air core transformer is structured to receive the converted AC power from the first inverter. The detection circuit is structured to detect a first mode of the first inverter and a second mode of the first inverter, and operate the current buffer stage based on a detected first mode of the inverter and a detected second mode of the first inverter.
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公开(公告)号：US10673340B2
公开(公告)日：2020-06-02
申请号：US15814465
申请日：2017-11-16
Applicant: ABB Schweiz AG
Inventor： Sandeep Bala
Abstract: Unique systems, methods, techniques and apparatuses of an exemplary power converter are disclosed. One exemplary embodiment is a power converter comprising a power cell and a transformer. The power cell including a first and second DC input terminal, a first leg including a first and second switching device coupled and a first AC output terminal, a second leg including a third and fourth switching device and a second AC output terminal. The first and second AC output terminals are coupled to the AC power source and structured to receive an AC power from the AC power source. The transformer includes a primary winding, the primary winding being coupled across the first AC output terminal and the second AC output terminal.
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公开(公告)号：US20200052608A1
公开(公告)日：2020-02-13
申请号：US16658911
申请日：2019-10-21
Applicant: ABB Schweiz AG
Inventor： Sandeep Bala , Arun Kumar Kadavelugu
Abstract: A converter system includes a DC bus for each phase of an input AC power signal; a first switching cell for each phase, including first two active switches coupled in series across the DC bus and forming a first switching cell AC pole therebetween, the first switching cell AC pole being coupled to a respective phase; and a second switching cell for each phase, including second two active switches coupled in series across the DC bus and forming a second switching cell AC pole therebetween. The second switching cell AC poles are coupled to each other to form a flying neutral. One of the first switching cell and the second switching cell switches at a frequency at least an order of magnitude greater than the line frequency. The other of the first switching cell and the second switching cell switches at a frequency approximately equal to the line frequency.
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公开(公告)号：US10483032B2
公开(公告)日：2019-11-19
申请号：US15961413
申请日：2018-04-24
Applicant: ABB Schweiz AG
Inventor： Alberto Prieto , Ion C. Radu , Nikolaus Zant , Sandeep Bala , Matthew Lee Henriksen , Parag Upadhyay
Abstract: Unique systems, methods, techniques and apparatuses of a modular power transformer are disclosed. One exemplary embodiment is a matrix power transformer including a plurality of block assemblies each including a plurality of transformer modules, each transformer module including a primary winding coupled to an input and a secondary winding coupled to an output, the inputs of each transformer module in one block assembly being coupled together and the outputs of each transformer block being coupled together. One of the secondary windings includes a plurality of taps structured to be selectively coupled to the output of the associated transformer module assembly or another secondary winding of the associated module assembly.
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公开(公告)号：US20180308632A1
公开(公告)日：2018-10-25
申请号：US15961413
申请日：2018-04-24
Applicant: ABB Schweiz AG
Inventor： Alberto Prieto , Ion C. Radu , Nikolaus Zant , Sandeep Bala , Matthew Lee Henriksen , Parag Upadhyay
Abstract: Unique systems, methods, techniques and apparatuses of a modular power transformer are disclosed. One exemplary embodiment is a matrix power transformer including a plurality of block assemblies each including a plurality of transformer modules, each transformer module including a primary winding coupled to an input and a secondary winding coupled to an output, the inputs of each transformer module in one block assembly being coupled together and the outputs of each transformer block being coupled together. One of the secondary windings includes a plurality of taps structured to be selectively coupled to the output of the associated transformer module assembly or another secondary winding of the associated module assembly.
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