公开(公告)号：US11264886B1

公开(公告)日：2022-03-01

申请号：US17148530

申请日：2021-01-13

Applicant: National Taiwan University of Science and Technology

Inventor： Chien-Chun Huang ,  Huang-Jen Chiu

IPC: H02M1/08 ,  H02M7/217 ,  H02M3/00 ,  H02M1/00 ,  H02M3/158 ,  H02M3/07

Abstract: A control circuit and a control method for a power converter are provided. The power converter includes a plurality of resonant tanks and a plurality of switches disposed between an input terminal and an output terminal. The switches correspond to a first mode and a second mode, respectively, and the control circuit includes a first switch control circuit, a first zero current detection circuit, a second zero current detection circuit, a first switch off detector, a modulation time calculation module, a second switch control circuit, a third zero current detection circuit, a fourth zero current detection circuit, and a second switch off detector. The control circuit uses a plurality of zero current detection circuits to perform time modulations on a plurality of rectifier switches in the switches.

公开(公告)号：US11171561B2

公开(公告)日：2021-11-09

申请号：US16779715

申请日：2020-02-03

Applicant: National Taiwan University of Science and Technology

Inventor： Yu-Chen Liu ,  Chen Chen ,  De-Jia Lu ,  Yong-Long Syu ,  Kai-De Chen ,  Ching-Chia Chen ,  Katherine Ann Kim ,  Huang-Jen Chiu

IPC: H02M3/335 ,  H02M7/23 ,  H02M1/42 ,  H01F27/28 ,  H02M1/44 ,  H02M3/00 ,  H02M1/00

Abstract: A transformer includes a magnetic core, a primary side winding and a plurality of secondary side windings. The magnetic core includes a first outer column, a second outer column, an upper cover and a lower cover. The first outer column and the second outer column are disposed between the upper cover and the lower cover. The primary side winding is disposed on the first outer column and the second outer column, and the plurality of secondary side windings are disposed on the first outer column and the second outer column. Each of the secondary windings has one end passing through a region between the first outer column and the second outer column.

公开(公告)号：US11101734B2

公开(公告)日：2021-08-24

申请号：US16817735

申请日：2020-03-13

Applicant: National Taiwan University of Science and Technology

Inventor： Jing-Yuan Lin ,  Jun-Ru Wang ,  Pin-Hsien Liu ,  Huang-Jen Chiu

IPC: H02M3/158 ,  H02M1/00 ,  H02M1/34

Abstract: A multi-level buck converter includes an input power source, an input capacitor, first to fourth switches, a clamp capacitor, an output inductor, a clamp switch, a clamp diode, an output capacitor, an output load, a current detection circuit, a voltage detection circuit and a control circuit. The current detection circuit detects whether an inductor current of the output inductor exceeds a predetermined current value, and if so, the output clamp signal controls the clamp switch to be turned on. The voltage detection circuit generates a duty cycle control signal according to an error between an output voltage and a target output voltage. The control circuit controls the first to the fourth switches to sequentially enter a first mode, a second mode, a third mode, and a fourth mode in a first part of a duty cycle.

公开(公告)号：US11489449B2

公开(公告)日：2022-11-01

申请号：US16576333

申请日：2019-09-19

Applicant: National Taiwan University of Science and Technology

Inventor： Yu-Chen Liu ,  Chen Chen ,  Kai-De Chen ,  Yong-Long Syu ,  Anh Dung Nguyen ,  Huang-Jen Chiu

IPC: H02M3/335 ,  H01F21/02 ,  H01F27/24 ,  H01F27/28 ,  H02M3/00

Abstract: An adjustable leakage inductance transformer includes a magnetic core, a primary side coil and a secondary side coil. The magnetic core includes a magnetic core column structure, which has a central column, a first outer column and a second outer column. The primary side coil is wound on the first outer column and the second outer column by a first primary side coil loop number and a second primary side coil loop number, respectively. The secondary side coil is wound on the first outer column and the second outer column by a first secondary side coil loop number and a second secondary side coil loop number, respectively, the first primary side coil loop number is not equal to the first secondary side coil loop number, and the second primary side coil loop number is not equal to the second secondary side coil loop number.

公开(公告)号：US11043892B2

公开(公告)日：2021-06-22

申请号：US16896326

申请日：2020-06-09

Applicant: National Taiwan University of Science and Technology

Inventor： Jing-Yuan Lin ,  Ruei-Sheng Tsai ,  Zhong-Heng Li ,  Pin-Hsien Liu ,  Huang-Jen Chiu

IPC: H02M1/42 ,  H02M7/217 ,  H02M7/5395 ,  H02M1/088

Abstract: A totem-pole bridgeless power factor corrector and a power factor correction method are provided. The totem-pole bridgeless power factor corrector obtains a duty cycle of next state by a predictive valley-peak current control method, and uses an OR gate element to combine PWM signals generated by an average current control method and the predictive valley-peak current control method, thereby enabling a digital signal processor to update the duty cycle.