公开(公告)号：US20210006149A1

公开(公告)日：2021-01-07

申请号：US17025126

申请日：2020-09-18

Applicant: ABB Schweiz AG

Inventor： Sheng Zong ,  Guoxing Fan ,  Kai Tian ,  Mei Liang

IPC: H02M1/12 ,  H02M7/5387 ,  H02M1/08 ,  H02M7/483

Abstract: A power converter includes a full-bridge conversion circuit. The full-bridge conversion circuit includes a first leg and a second leg. The first leg includes at least two switches coupled to each other at a first node, and the second leg includes at least two switches coupled to each other at a second node. The power converter further includes an AC filter. The AC filter includes a first inductor, a second inductor and a capacitor. The first inductor includes a first end coupled to the first node and a second end could be couple to a grid. The second inductor includes a first end coupled to the second node and a second end could be couple to the grid. The capacitor includes a first end coupled to the second end of the first inductor and a second end coupled to the second leg. The first end of the capacitor is electrically coupled to the second end of the first inductor during a cycle of an AC voltage of the grid.

公开(公告)号：US11303196B2

公开(公告)日：2022-04-12

申请号：US17212636

申请日：2021-03-25

Applicant: ABB Schweiz AG

Inventor： Kai Tian ,  Tinho Li ,  Kuenfaat Yuen ,  Mei Liang

IPC: H02M1/14 ,  H02M5/458

Abstract: An objective of the present application is to provide an apparatus for conversion between AC power and DC power. The apparatus includes a first power conversion circuit having a first AC side and a first DC side, at least one second power conversion circuit each having a second AC side and a second DC side; and at least one choke having a first terminal, a second terminal and at least one third terminal, wherein the first terminal is arranged to be electrically coupled to a phase of the AC power, and the second terminal and the at least one third terminal are electrically coupled to respective same phases of the first AC side of the first power conversion circuit and the second AC side of the at least one second power conversion circuit. Moreover, the choke includes a first common-mode choke and a first differential-mode choke, wherein: the first common-mode choke and the first differential-mode choke are electrically coupled in series via a first group of coil ends of the first common-mode choke and a first group of coil ends of the first differential-mode choke, and a second group of coil ends of one of the first common-mode choke and the first differential-mode choke are electrically coupled to the first terminal of the choke, and a second group of coil ends of the other are respectively electrically coupled to the second terminal and the at least one third terminal of the choke. The first common-mode choke can help provide high inductance to the high-frequency components of the common-mode current, which flows from the AC power source, since the impedance of the common-mode choke and the differential-mode choke depends on frequency on the same scale as inductance. The advantages of using the common-mode choke is that it provides twice the inductance of separate inductor design due to the coupling effect. Therefore it filters the common-mode current more effectively or the inductance size can be reduced for a given current ripple requirement.

公开(公告)号：US11418106B2

公开(公告)日：2022-08-16

申请号：US17212669

申请日：2021-03-25

Applicant: ABB Schweiz AG

Inventor： Kai Tian ,  Tinho Li ,  Kuenfaat Yuen ,  Mei Liang

IPC: H02M1/12 ,  H02M7/219 ,  H02M7/487

Abstract: An apparatus for conversion between AC power and DC power. The apparatus includes: a first power conversion circuit having a first AC side and a DC side, at least one second power conversion circuit each having a second AC side and sharing the DC side with the first power conversion circuit, and at least one choke having a first terminal, a second terminal and at least one third terminal, wherein: the first terminal is arranged to be electrically coupled to a phase of the AC power, and the second terminal and the at least one third terminal are electrically coupled to respective same phases of the first AC side of the first power conversion circuit and the second AC side of the at least one second power conversion circuit. Moreover, the choke includes: a first common-mode choke and a first differential-mode choke, wherein: the first common-mode choke and the first differential-mode choke are electrically coupled in series via a first group of coil ends of the first common-mode choke and a first group of coil ends of the first differential-mode choke, and a second group of coil ends of one of the first common-mode choke and the first differential-mode choke are electrically coupled to the first terminal of the choke, and a second group of coil ends of the other are respectively electrically coupled to the second terminal and the at least one third terminal of the choke. The first common-mode choke can help provide high inductance to the high-frequency components of the common-mode current, which flows from the AC power source, since the impedance of the common-mode choke and the differential-mode choke depends on frequency on the same scale as inductance. The advantages of using the common-mode choke is that it provides twice the inductance of separate inductor design due to the coupling effect. Therefore it filters the common-mode current more effectively on the inductance size can be reduced for a given current ripple requirement.

公开(公告)号：US20220103085A1

公开(公告)日：2022-03-31

申请号：US17423584

申请日：2019-06-12

Applicant: ABB Schweiz AG

Inventor： Kai Tian ,  Tinho Li ,  Kuenfaat Yuen ,  Mei Liang

IPC: H02M5/293 ,  H02M1/00

Abstract: Voltage converter circuits including a first and second branch. The first branch is coupled between a first DC terminal and a second DC terminal and includes a first and second winding around a magnetic core. The first and second winding are coupled to an AC terminal via a common node. The second branch is coupled in parallel to the first branch between the first and second DC terminals and includes a third winding around the magnetic core. The third winding is coupled to the AC terminal such that the first and second branches convert a first voltage into a second voltage. The first, second and third windings are configured to cause magnetic flux generated by a differential mode (DM) component of a first current in the first branch and magnetic flux generated by the DM component of a second current in the second branch to enhance with each other.

公开(公告)号：US11171557B2

公开(公告)日：2021-11-09

申请号：US17025126

申请日：2020-09-18

Applicant: ABB Schweiz AG

Inventor： Sheng Zong ,  Guoxing Fan ,  Kai Tian ,  Mei Liang

IPC: H02M7/5387 ,  H02M1/12 ,  H02M1/08 ,  H02M7/483

Abstract: A power converter includes a full-bridge conversion circuit. The full-bridge conversion circuit includes a first leg and a second leg. The first leg includes at least two switches coupled to each other at a first node, and the second leg includes at least two switches coupled to each other at a second node. The power converter further includes an AC filter. The AC filter includes a first inductor, a second inductor and a capacitor. The first inductor includes a first end coupled to the first node and a second end could be couple to a grid. The second inductor includes a first end coupled to the second node and a second end could be couple to the grid. The capacitor includes a first end coupled to the second end of the first inductor and a second end coupled to the second leg. The first end of the capacitor is electrically coupled to the second end of the first inductor during a cycle of an AC voltage of the grid.

公开(公告)号：US20210273552A1

公开(公告)日：2021-09-02

申请号：US17212636

申请日：2021-03-25

Applicant: ABB Schweiz AG

Inventor： Kai Tian ,  Tinho Li ,  Kuenfaat Yuen ,  Mei Liang

IPC: H02M1/14 ,  H02M5/458

Abstract: It is therefore an objective of the invention to provide an apparatus for conversion between AC power and DC power. The apparatus includes a first power conversion circuit having a first AC side and a first DC side, at least one second power conversion circuit each having a second AC side and a second DC side; and at least one choke having a first terminal, a second terminal and at least one third terminal, wherein the first terminal is arranged to be electrically coupled to a phase of the AC power, and the second terminal and the at least one third terminal are electrically coupled to respective same phases of the first AC side of the first power conversion circuit and the second AC side of the at least one second power conversion circuit. Moreover, the choke includes a first common-mode choke and a first differential-mode choke, wherein: the first common-mode choke and the first differential-mode choke are electrically coupled in series via a first group of coil ends of the first common-mode choke and a first group of coil ends of the first differential-mode choke, and a second group of coil ends of one of the first common-mode choke and the first differential-mode choke are electrically coupled to the first terminal of the choke, and a second group of coil ends of the other are respectively electrically coupled to the second terminal and the at least one third terminal of the choke. The first common-mode choke can help provide high inductance to the high-frequency components of the common-mode current, which flows from the AC power source, since the impedance of the common-mode choke and the differential-mode choke depends on frequency on the same scale as inductance. The advantages of using the common-mode choke is that it provides twice the inductance of separate inductor design due to the coupling effect. Therefore it filters the common-mode current more effectively or the inductance size can be reduced for a given current ripple requirement.

公开(公告)号：US11671030B2

公开(公告)日：2023-06-06

申请号：US17423584

申请日：2019-06-12

Applicant: ABB Schweiz AG

Inventor： Kai Tian ,  Tinho Li ,  Kuenfaat Yuen ,  Mei Liang

IPC: H02M7/23 ,  H02M5/293 ,  H02M1/00

CPC classification number: H02M7/23 ,  H02M1/0064 ,  H02M5/293 ,  H02M1/0043

Abstract: Voltage converter circuits including a first and second branch. The first branch is coupled between a first DC terminal and a second DC terminal and includes a first and second winding around a magnetic core. The first and second winding are coupled to an AC terminal via a common node. The second branch is coupled in parallel to the first branch between the first and second DC terminals and includes a third winding around the magnetic core. The third winding is coupled to the AC terminal such that the first and second branches convert a first voltage into a second voltage. The first, second and third windings are configured to cause magnetic flux generated by a differential mode (DM) component of a first current in the first branch and magnetic flux generated by the DM component of a second current in the second branch to enhance with each other.

公开(公告)号：US20220385173A1

公开(公告)日：2022-12-01

申请号：US17755961

申请日：2019-11-21

Applicant: ABB SCHWEIZ AG

Inventor： Sheng Zong ,  Guoxing Fan ,  Mei Liang

IPC: H02M1/42 ,  H02M1/00 ,  H02M7/25

Abstract: Embodiments of present disclosure relates to a power factor correction circuit and an industrial robot. The power factor correction circuit has first and second AC terminals, first and second DC terminals, a first input inductor connected to the first AC terminal, a second input inductor connected to the second AC terminal, a first coupling inductor, configured to suppress a leakage current of the power factor correction circuit.

公开(公告)号：US20210211037A1

公开(公告)日：2021-07-08

申请号：US17212669

申请日：2021-03-25

Applicant: ABB Schweiz AG

Inventor： Kai Tian ,  Tinho Li ,  Kuenfaat Yuen ,  Mei Liang

IPC: H02M1/12 ,  H02M7/219

Abstract: An apparatus for conversion between AC power and DC power. The apparatus includes: a first power conversion circuit having a first AC side and a DC side, at least one second power conversion circuit each having a second AC side and sharing the DC side with the first power conversion circuit, and at least one choke having a first terminal, a second terminal and at least one third terminal, wherein: the first terminal is arranged to be electrically coupled to a phase of the AC power, and the second terminal and the at least one third terminal are electrically coupled to respective same phases of the first AC side of the first power conversion circuit and the second AC side of the at least one second power conversion circuit. Moreover, the choke includes: a first common-mode choke and a first differential-mode choke, wherein: the first common-mode choke and the first differential-mode choke are electrically coupled in series via a first group of coil ends of the first common-mode choke and a first group of coil ends of the first differential-mode choke, and a second group of coil ends of one of the first common-mode choke and the first differential-mode choke are electrically coupled to the first terminal of the choke, and a second group of coil ends of the other are respectively electrically coupled to the second terminal and the at least one third terminal of the choke. The first common-mode choke can help provide high inductance to the high-frequency components of the common-mode current, which flows from the AC power source, since the impedance of the common-mode choke and the differential-mode choke depends on frequency on the same scale as inductance. The advantages of using the common-mode choke is that it provides twice the inductance of separate inductor design due to the coupling effect. Therefore it filters the common-mode current more effectively on the inductance size can be reduced for a given current ripple requirement.