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公开(公告)号：US20250111980A1
公开(公告)日：2025-04-03
申请号：US18894425
申请日：2024-09-24
Applicant: ABB Schweiz AG
Inventor： Tero Viitanen , Veli-Matti Leppänen , Peter Muszynski
Abstract: A saturable-core inductor includes a magnetic core structure having a non-saturable part and a saturable part. The non-saturable core part includes at least one core body arranged to form a closed magnetic circuit with at least one air gap. The saturable core part includes a core bridge element inserted into each of the at least one air gap to form a magnetic bridge across the air gap for the closed magnetic circuit. Each bridge element and the core bodies are configured to be unsaturated at predetermined low current levels to provide a low-current high inductance. Each bridge element is configured to saturate fully first with increasing current levels and to quickly drop the inductance from the low-current high inductance to a low inductance, while the air gap is configured to prevent the core bodies from a full saturation.
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公开(公告)号：US20240429833A1
公开(公告)日：2024-12-26
申请号：US18746133
申请日：2024-06-18
Applicant: ABB Schweiz AG
Inventor： Tero Viitanen , Veli-Matti Leppänen , Peter Muszynski
IPC: H02M7/493 , H02M7/5395
Abstract: Current sharing between the plurality of parallel-connected ARCP or hard-switching converter legs is balanced by a control arrangement. The control arrangement senses a leg output current in each of the parallel-connected converter legs and have an individual autonomous leg-specific switching instant adjustment for the main switches of each of the parallel-connected converter legs to shift the first mode A commutation of the respective converter leg later in time and to shift the second mode B commutation of the respective converter leg earlier in time by a variable timestep proportional to the value of the sensed leg current of the respective converter leg. In other words, if the value of the sensed leg output current in one converter leg is larger than in the other converter leg, then in mode A, the higher-current leg will commutate later than the leg with less current, and in mode B, the higher-current leg will commutate earlier than the leg with less current.
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公开(公告)号：US20240348180A1
公开(公告)日：2024-10-17
申请号：US18623659
申请日：2024-04-01
Applicant: ABB Schweiz AG
Inventor： Tero Viitanen , Mikko Kohvakka , Veli-Matti Leppänen
CPC classification number: H02M7/487 , H02M1/0009 , H02M1/0058
Abstract: A power converter system includes an auxiliary resonant commutated pole converter leg, particularly an ARCP half-bridge, having a series connection of a saturable-core inductor and at least one bi-directional auxiliary switch connected to a dc-link neutral point. An ARCP controller is provided to control turn-on of the at least one bi-directional auxiliary switch to provide an auxiliary current flowing through the saturable-core inductor, and a saturation instant detector is provided to detect a saturation instant of the saturable-core inductor due to the auxiliary current exceeding a saturation current after turn-on of the at least one bidirectional auxiliary switch. The ARCP controller is responsive the detector to continue providing the auxiliary current and thereby a boost current for a predetermined boost period after the detected saturation instant of the saturable-core inductor to achieve a desired total boost current.
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Patent Agency Ranking
公开(公告)号：US20240429832A1
公开(公告)日：2024-12-26
申请号：US18741109
申请日：2024-06-12
Applicant: ABB Schweiz AG
Inventor： Peter Muszynski , Veli-Matti Leppänen , Tero Viitanen
Abstract: A power converter system including an auxiliary resonant commutated pole converter leg, particularly an ARCP half-bridge, and a resonant swing time controller for the ARCP converter leg. The resonant swing time controller is configured to control a resonant swing time duration of ARCP commutations to a reference value of the resonant swing time by means of a closed loop feedback of an actual resonant swing time duration. In an embodiment, the resonant swing time controller is configured to provide, based on an error between the actual resonant swing time duration and the reference value, control values to adjust a turn-on instant of at least one auxiliary switching device of the ARCP converter leg earlier or later in time so that resonant swing time duration of ARCP commutations is controlled towards the reference value.
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公开(公告)号：US20230054916A1
公开(公告)日：2023-02-23
申请号：US17821521
申请日：2022-08-23
Applicant: ABB Schweiz AG
Inventor： Tero Viitanen
Abstract: A method for controlling a three-level brake chopper and a three-level brake chopper including, a first controllable semiconductor switch connected between a positive direct current pole and a first connection point, a second controllable semiconductor switch connected between the first connection point and a neutral direct current pole, a third controllable semiconductor switch connected between the neutral direct current pole and a second connection point, a fourth controllable semiconductor switch connected between the second connection point and a negative direct current pole, resistance means connected between the first connection point and the second connection point, and control means configured to control the second controllable semiconductor switch and the third controllable semiconductor switch into a conducting state in response to detecting a fault in the resistance means.
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公开(公告)号：US20240429808A1
公开(公告)日：2024-12-26
申请号：US18739963
申请日：2024-06-11
Applicant: ABB Schweiz AG
Inventor： Veli-Matti Leppänen , Peter Muszynski , Tero Viitanen
Abstract: A power converter system includes auxiliary resonant commutated pole converter legs, particularly ARCP half-bridge legs, connected in parallel between a common dc system and a common ac system or between two common dc systems. Commutations of the parallel-connected converter legs are initiated by simultaneous commutation commands. A control arrangement is provided to balance a current sharing between the parallel-connected ARCP converter legs by means of having an individual autonomous leg-specific boost current adjustment for each of the parallel-connected ARCP converter legs for adjusting boost currents in a direction that a differential output current is reduced. Each individual boost current adjustment is dependent on the magnitude of the leg current of the respective ARCP converter leg only.
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公开(公告)号：US20240305216A1
公开(公告)日：2024-09-12
申请号：US18599360
申请日：2024-03-08
Applicant: ABB Schweiz AG
Inventor： Veli-Matti Leppanen , Peter Muszynski , Tero Viitanen
CPC classification number: H02M7/493 , H02M1/0009 , H02M7/521
Abstract: A power inverter system includes switching mode inverter legs connected in parallel between a common DC input and, via leg output inductors, a common phase output to feed a phase output current to a common load. The commutations of the parallel-connected inverter legs are initiated by essentially simultaneous commutation commands. The leg output current is sensed before and after a commutation in each of the parallel-connected inverter legs to obtain a pre-commutation current value and a post-commutation current value. Alternatively, a voltage pulse over the leg output inductor is sensed in each of the parallel-connected inverter legs during the commutation. A current sharing between the parallel-connected inverter legs is balanced by means of adjusting switching instants of main switches of the parallel-connected inverter legs for subsequent commutation autonomously in each of the parallel-connected inverter legs based on a difference between the pre-commutation and the post-commutation current values or based on the sensed voltage pulse of the respective parallel-connected inverter leg.
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公开(公告)号：US12074431B2
公开(公告)日：2024-08-27
申请号：US17821521
申请日：2022-08-23
Applicant: ABB Schweiz AG
Inventor： Tero Viitanen
Abstract: A method for controlling a three-level brake chopper and a three-level brake chopper including, a first controllable semiconductor switch connected between a positive direct current pole and a first connection point, a second controllable semiconductor switch connected between the first connection point and a neutral direct current pole, a third controllable semiconductor switch connected between the neutral direct current pole and a second connection point, a fourth controllable semiconductor switch connected between the second connection point and a negative direct current pole, resistance means connected between the first connection point and the second connection point, and control means configured to control the second controllable semiconductor switch and the third controllable semiconductor switch into a conducting state in response to detecting a fault in the resistance means.
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