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

IPC: H02M1/088 ,  H02M7/539

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.

公开(公告)号：US20240178739A1

公开(公告)日：2024-05-30

申请号：US18520906

申请日：2023-11-28

Applicant: ABB Schweiz AG

Inventor： Veli-Matti Leppänen ,  Peter Muszynski

IPC: H02M1/00 ,  H02M7/487

CPC classification number: H02M1/0048 ,  H02M7/487

Abstract: A control apparatus for ARCP (Auxiliary Resonant Commuted Pole) power inverters include a modulator and a modulation control. The modulator is configured to carry out a commutation of an ARCP inverter by selectively using a Continuous PWM (CPWM) modulation and a Discontinuous PWM (DPWM) modulation. The modulation control is configured to dynamically select either the CPWM modulation or the DPWM modulation in a such a way that switching losses of the ARCP inverter are reduced while a failure of the commutation of the ARCP inverter due to a neutral point voltage unbalance of the ARCP inverter is avoided.

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

IPC: H02M7/493 ,  H02M7/48 ,  H02M7/539

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.

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

IPC: H01F27/24 ,  H01F27/28 ,  H02M7/537

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.

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.

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

IPC: H02M7/487 ,  H02M1/00

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.