公开(公告)号：US20230037399A1

公开(公告)日：2023-02-09

申请号：US17972290

申请日：2022-10-24

Applicant: DELTA ELECTRONICS, INC.

Inventor： Sheng-Hua LI ,  Wen-Lung HUANG

IPC: H02M3/24

Abstract: A power apparatus applied in a solid state transformer structure includes an AC-to-DC conversion unit, a first DC bus, and a plurality of bi-directional DC conversion units. First sides of the bi-directional DC conversion units are coupled to the first DC bus. Second sides of the bi-directional DC conversion units are configured to form at least one second DC bus, and the number of the at least one second DC bus is a bus number. The bi-directional DC conversion units receive a bus voltage of the first DC bus and convert the bus voltage into at least one DC voltage, or the bi-directional DC conversion units receive at least one external DC voltage and convert the at least one external DC voltage into the bus voltage.

公开(公告)号：US20210203317A1

公开(公告)日：2021-07-01

申请号：US17011370

申请日：2020-09-03

Applicant: DELTA ELECTRONICS, INC.

Inventor： Li-Ching YANG ,  Wen-Lung HUANG ,  Sheng-Hua LI

IPC: H03K17/0812 ,  H02M3/158

Abstract: A pre-charge control circuit includes a control unit, a conversion unit, and a pre-charge switch. The control unit provides a control signal according to a PWM signal, and the conversion unit provides a control voltage according to the control signal. The pre-charge switch adjusts a magnitude of the current flowing through the input path of the electronic circuit according to the control voltage.

公开(公告)号：US20210159812A1

公开(公告)日：2021-05-27

申请号：US17168815

申请日：2021-02-05

Applicant: DELTA ELECTRONICS, INC.

Inventor： Wen-Lung HUANG ,  Sheng-Hua LI

IPC: H02M7/797 ,  H02M5/458 ,  H02M7/5387 ,  H02M7/219 ,  H02M7/48 ,  H02M7/483 ,  H02M7/81

Abstract: A power apparatus applied in an SST structure includes a first AC-to-DC conversion unit, a first DC bus, an isolated transformer, a DC-to-AC conversion unit, a second AC-to-DC conversion unit, and a second DC bus. The first AC-to-DC conversion unit has a first bridge arm and a second bridge arm. The first DC bus provides a first DC voltage. The isolated transformer has a primary side and a secondary side. The DC-to-AC conversion unit has a third bridge arm and a fourth bridge arm. The second AC-to-DC conversion unit has a fifth bridge arm and a sixth bridge arm. The second DC bus provides a second DC voltage.

公开(公告)号：US20250089153A1

公开(公告)日：2025-03-13

申请号：US18792346

申请日：2024-08-01

Applicant: DELTA ELECTRONICS, INC.

Inventor： Jui-Chien HUNG ,  Wen-Lung HUANG ,  Sheng-Hua LI

IPC: H05K1/02 ,  H05K1/18 ,  H05K7/20

Abstract: This disclosure is directed to a solid state transformer and a printed circuit board stack-up structure, the printed circuit board stack-up structure has a plate, a power device, a thermally conductive insulating layer, a heat diffusion layer and a thermal conductor. The plate has a first surface and a second surface respectively disposed at two sides. The power device is arranged on the first surface. The thermally conductive insulating layer is pressed to combine with the second surface and cover the second surface. The heat diffusion layer is pressed to combine with the thermally conductive insulating layer and cover the thermally conductive insulating layer. The thermal conductor is embedded in the plate and respectively connected to the power device and the thermally conductive insulating layer.

公开(公告)号：US20240364224A1

公开(公告)日：2024-10-31

申请号：US18765818

申请日：2024-07-08

Applicant: DELTA ELECTRONICS, INC.

Inventor： Che-Wei CHANG ,  Wen-Lung HUANG ,  Sheng-Hua LI

IPC: H02M3/335 ,  H02M1/00

CPC classification number: H02M3/3353 ,  H02M1/0058 ,  H02M3/33592

Abstract: An auxiliary power circuit of a conversion module is used to supply power to a control unit, and an input end of the conversion module includes an even number of energy storage units coupled in series. The auxiliary power circuit includes an even number of primary-side circuits and a secondary-side circuit. Each primary-side circuit includes a first switch unit, a second switch unit, and a resonance tank. The first switch unit is connected to the second switch unit in series, and is correspondingly connected to one of the energy storage units in parallel. The resonance tank is connected to the second switch unit in parallel. The secondary-side circuit is coupled to the resonance tanks of two of the primary-side circuits to acquire power and supply power to the control unit.

公开(公告)号：US20240264218A1

公开(公告)日：2024-08-08

申请号：US18637993

申请日：2024-04-17

Applicant: DELTA ELECTRONICS, INC.

Inventor： Li-Ching YANG ,  Wen-Lung HUANG ,  Sheng-Hua LI

IPC: G01R31/14

CPC classification number: G01R31/14

Abstract: An insulation resistance detection circuit is coupled to a positive end and a negative end of a DC power source, and is used to detect a positive insulation resistance between the positive end and a ground point and detect a negative insulation resistance between the negative end and the ground point. A detection unit sets a first estimated resistance and a second estimated resistance, and acquires a first voltage based on turning on the switch and acquires a second voltage based on turning off the switch. The detection unit calculates a third voltage and a fourth voltage according to the first estimated resistance and the second estimated resistance so as to detect the positive insulation resistance and the negative insulation resistance when the third voltage is equal to the first voltage and the fourth voltage is equal to the second voltage.

公开(公告)号：US20240014740A1

公开(公告)日：2024-01-11

申请号：US18471731

申请日：2023-09-21

Applicant: DELTA ELECTRONICS, INC.

Inventor： Sheng-Hua LI ,  Wen-Lung HUANG

IPC: H02J4/00 ,  H02M1/00

CPC classification number: H02J4/00 ,  H02M1/007 ,  B60L53/30

Abstract: A power apparatus applied in a solid state transformer structure includes an AC-to-DC conversion unit, a first DC bus, and a plurality of bi-directional DC conversion units. First sides of the bi-directional DC conversion units are coupled to the first DC bus. Second sides of the bi-directional DC conversion units are configured to form at least one second DC bus, and the number of the at least one second DC bus is a bus number. The bi-directional DC conversion units receive a bus voltage of the first DC bus and convert the bus voltage into at least one DC voltage, or the bi-directional DC conversion units receive at least one external DC voltage and convert the at least one external DC voltage into the bus voltage.

公开(公告)号：US20230305052A1

公开(公告)日：2023-09-28

申请号：US17892512

申请日：2022-08-22

Applicant: DELTA ELECTRONICS, INC.

Inventor： Li-Ching YANG ,  Wen-Lung HUANG ,  Sheng-Hua LI

IPC: G01R31/14

CPC classification number: G01R31/14

Abstract: An insulation resistance detection circuit is coupled to a positive end and a negative end of a DC power source, and is used to detect a positive insulation resistance between the positive end and a ground point and detect a negative insulation resistance between the negative end and the ground point. A detection unit sets a first estimated resistance and a second estimated resistance, and acquires a first voltage based on turning on the switch and acquires a second voltage based on turning off the switch. The detection unit calculates a third voltage and a fourth voltage according to the first estimated resistance and the second estimated resistance so as to detect the positive insulation resistance and the negative insulation resistance when the third voltage is equal to the first voltage and the fourth voltage is equal to the second voltage.

公开(公告)号：US20230048191A1

公开(公告)日：2023-02-16

申请号：US17751414

申请日：2022-05-23

Applicant: DELTA ELECTRONICS, INC.

Inventor： Sheng-Hua LI ,  Hung-Chang WANG ,  Tsu-Hua AI

IPC: H02J7/00 ,  H02M3/158

Abstract: A battery cell balance circuit includes an AC/DC converter, a plurality of battery cells, a plurality of switches, an isolated DC/DC converter, a circuit switch, and a control unit. The AC/DC converter receives an AC power. The battery cells are connected in series to form a battery link. Each switch is correspondingly connected to one battery cell. The isolated DC/DC converter is coupled to the switches and coupled to the battery link in series. The circuit switch is coupled between the AC/DC converter, the isolated DC/DC converter, and the plurality of switches. The control unit provides a plurality of control signals to correspondingly control the plurality of switches and the circuit switch.

公开(公告)号：US20210091676A1

公开(公告)日：2021-03-25

申请号：US16929867

申请日：2020-07-15

Applicant: DELTA ELECTRONICS, INC.

Inventor： Sheng-Hua LI

IPC: H02M3/335 ,  H02M7/00

Abstract: A power system with communication function applied to a solid state transformer structure includes a plurality of conversion units, a bus path, a plurality of coupling units, and a control module. The conversion units are coupled to the bus path and the coupling units, and the coupling units are coupled to the control module. Each coupling unit is correspondingly coupled to a control unit of each conversion unit. A first-connected coupling unit of the coupling units is coupled to the control module.