公开(公告)号：US20180041122A1

公开(公告)日：2018-02-08

申请号：US15628631

申请日：2017-06-20

Applicant: DELTA ELECTRONICS, INC.

Inventor： Tsung-Han TSAI ,  Po-Jen HOU ,  Xin-Hung LIN

IPC: H02M3/158 ,  H02H1/00 ,  H02J9/06 ,  G05D9/12 ,  H02M7/40 ,  H02M1/42 ,  H02J3/38

CPC classification number: H02M3/158 ,  G01R27/18 ,  G01R31/14 ,  G05D9/12 ,  H02H1/0046 ,  H02J3/387 ,  H02J9/061 ,  H02M1/4208 ,  H02M7/40

Abstract: An insulation detecting circuit includes a first switching unit, a second switching unit, a detecting resistor, a processing unit, and a voltage detecting unit. The second switching unit is electrically coupled to the first switching unit. The processing unit is configured to control the first and the second switching units. The voltage detecting unit obtains a first voltage value across the detecting resistor when the processing unit controls the first switching unit to be on and the second switching unit to be off. The voltage detecting unit obtains a second voltage value across the detecting resistor when the processing unit controls the first switching unit to be off and the second switching unit to be on. The processing unit operates in a first mode and configured to calculate an insulation impedance value of a power converting device according to the first and the second voltage values.

公开(公告)号：US20210281075A1

公开(公告)日：2021-09-09

申请号：US17023408

申请日：2020-09-17

Applicant: DELTA ELECTRONICS, INC.

Inventor： Sin-Hong CHEN ,  Tsung-Han TSAI ,  Xin-Hung LIN

IPC: H02J3/38 ,  H02M7/48

Abstract: A smart grid system includes a current sensor, and plural power conversion devices coupled to an AC grid. The current sensor measures a total current flowed through the AC grid, thereby providing a measured current value. The power conversion devices include a master power conversion device and plural slave power conversion devices. The master power conversion device receives the measured current value, thereby controlling an output power of the master power conversion device and providing a first duty cycle signal according to the measured current value. A first one of the slave power conversion devices which is coupled to the master power conversion device receive the first duty cycle signal, thereby controlling an output power of the first one of the slave power conversion devices according to the first duty cycle signal. The master power conversion device and the slave power conversion devices are communicated via a daisy chain connection.

公开(公告)号：US20180011149A1

公开(公告)日：2018-01-11

申请号：US15469595

申请日：2017-03-27

Applicant: DELTA ELECTRONICS, INC.

Inventor： Tsung-Han TSAI ,  Po-Jen HOU ,  Chen-Wei KU ,  Xin-Hung LIN

IPC: G01R31/40 ,  H02J3/38 ,  G01R15/14 ,  G05B15/02 ,  H02M7/44 ,  H02M3/04

CPC classification number: G01R31/40 ,  G01R15/146 ,  G01R27/18 ,  G05B15/02 ,  H02H3/16 ,  H02J3/383 ,  H02M1/32 ,  H02M3/04 ,  H02M3/158 ,  H02M7/44 ,  H02M7/5387 ,  H02M2001/007 ,  Y02E10/563

Abstract: A power converting device includes a DC-DC converting circuit, a DC-AC converting circuit, and an insulation detecting circuit. The DC-DC converting circuit is configured to convert a DC input voltage to a DC bus voltage. The DC-AC converting circuit is electrically coupled to the DC-DC converting circuit and configured to convert the DC bus voltage to an AC voltage. The insulation detecting circuit is electrically coupled between the DC-DC converting circuit and the DC-AC converting circuit. The insulation detecting circuit is configured to detect a ground impedance value of the power converting device according to the DC bus voltage.

公开(公告)号：US20190202098A1

公开(公告)日：2019-07-04

申请号：US16110461

申请日：2018-08-23

Applicant: DELTA ELECTRONICS, INC.

Inventor： Tsung-Han TSAI ,  Yao-Chien LIN ,  Xin-Hung LIN

IPC: B29C45/26 ,  F16J15/02

CPC classification number: B29C45/26 ,  B29C2045/2683 ,  B29L2031/265 ,  F16J15/022

Abstract: A waterproof gasket structure and its gasket shaping mold are provided. The gasket shaping mold includes a mold seat having a surface, and plural mold cavity ring-grooves concavely formed on the surface, each having two corresponding longitudinal groove sections. At least one longitudinal groove section has one or more inwardly bent wavy bent portions, and plural turning round corner portions are formed at the junction between the longitudinal groove section and the wavy bent portion, and each turning round corner portion has a radius equal to or greater than 6 mm. Therefore, the middle of the mold cavity ring-groove can be utilized effectively, and plural waterproof gaskets can be manufactured by the same gasket shaping mold while achieving the effects of reducing the mold volume, improving the manufacturing efficiency, and saving the manufacturing cost.