公开(公告)号：US10153706B2

公开(公告)日：2018-12-11

申请号：US15805273

申请日：2017-11-07

Applicant: Delta Electronics, Inc.

Inventor： Jianping Ying ,  Teng Liu ,  Yi Zhang ,  Yong Zeng

IPC: H02M5/40 ,  H02M5/458 ,  H02M1/36 ,  H02M1/42

Abstract: The present disclosure provides a precharge device and a frequency converter. The precharge device is applied in a flying capacitor type multi-level converter circuit, and the multi-level converter circuit includes: a flying capacitor, a bus capacitor, a first and second semiconductor components, wherein the first semiconductor component is electrically connected between a first end of the flying capacitor and a first end of the bus capacitor, and the second semiconductor component is electrically connected between a second end of the flying capacitor and a second end of the bus capacitor; and the precharge device includes: an AC source; and an auxiliary circuit electrically connected with the AC source, wherein the auxiliary circuit reuses the first and second semiconductor components, and the AC source charges the flying capacitor and the bus capacitor through the auxiliary circuit.

公开(公告)号：US10991504B2

公开(公告)日：2021-04-27

申请号：US15992329

申请日：2018-05-30

Applicant: Delta Electronics, Inc.

Inventor： Jianxing Dong ,  Yong Zeng ,  Teng Liu ,  Jianping Ying

IPC: H01F27/29 ,  H01F27/28 ,  H01F27/24 ,  H01F27/32 ,  H02K3/40 ,  H01F27/30 ,  H01F3/14 ,  H01F27/245

Abstract: A magnetic assembly includes a magnetic core and a winding. The magnetic core comprises an upper cover, a lower cover and at least one core column provided between the upper cover and the lower cover, the core column presents a prismatic shape and has at least two lateral surfaces, the lateral surfaces intersect with each other to form at least two longitudinal ridges, and the longitudinal ridge extends along the longitudinal direction of the core column. The winding, winding around the core column, a first semi-conductive component is provided between the core column and the winding at the position corresponding to the longitudinal ridge.

公开(公告)号：US10727664B2

公开(公告)日：2020-07-28

申请号：US16410151

申请日：2019-05-13

Applicant: Delta Electronics, Inc.

Inventor： Teng Liu ,  Yong Zeng ,  Jianping Ying ,  Ming Wang ,  Xiaobo Huang ,  Jun Liu

IPC: H02H7/122 ,  H03K17/082 ,  H05K7/20 ,  H02M1/088 ,  H02M1/36 ,  H02M7/537 ,  H03K17/08

Abstract: The present disclosure provides a temperature protection circuit for a power converter, including a plurality of temperature protection branches, each of the temperature protection branches comprises a resistor, a voltage source, a temperature switch, and an isolation transformer, and each of the temperature protection branches corresponds to one of the power semiconductor switch blocks, and a first end of the resistor of each of the temperature protection branches is coupled to an output electrode of the power semiconductor switch block, and a second end of the resistor is coupled to a first end of the voltage source and coupled to a first end of the contact of the temperature switch via a primary winding of the isolation transformer, a second end of the voltage source and a second end of the contact of the temperature switch are respectively coupled to the potential midpoint of the power converter.