National Taiwan University

Cyberpower Systems, Inc.

Yu-Cheng Yang

Joe-Air Jiang

Tzu-Shiang Lin

Cheng-Long Chuang

Wei-Sheng Su

Chien-Hao Wang

Ching-Ya Tseng

Xiang-Yao Zheng

Kuang-Yu Yang

Cheng-Hsin Yeh

A power conversion circuit for an uninterruptible power system, including an inductor, a first capacitor, a second capacitor, a first switch, a second switch, a third switch, a first diode, a second diode, and a third diode body, is provided. A terminal of the second switch is electrically coupled to the inductor through the first switch, and another terminal of the second switch is electrically coupled to a neutral wire and the third switch. An anode and a cathode of the first diode are electrically coupled to the first switch and a positive DC bus, respectively. A cathode and an anode of the second diode are electrically coupled to the first switch and the third switch, respectively. A cathode and an anode of the third diode are electrically coupled to the third switch and a negative DC bus, respectively. In addition, an uninterruptible power system using the same is provided.

Uninterruptible power system and power conversion circuit thereof

A sensing device for power transmission line includes an induction coil device, a sensing circuit device, and a housing. A plurality of iron cores and a plurality of windings defined in the induction coil device. The windings are wound around the iron cores. A hole for power transmission line is defined in the induction coil device. The sensing circuit device detects operation status of a power transmission line and environmental parameters. The sensing circuit device includes a cover and a bottom plate. Multiple circuit boards are mounted on the bottom plate. The induction coil device is mounted on one side of the cover. Each of two ends of the housing has a streamline shape. The housing is hollow for receiving the sensing circuit device. The iron cores of the induction coil device includes at least one first iron core and at least one second iron core.

Sensing circuit, sensing device and monitoring system for power transmission lines

An underwater wireless sensor is provided. The underwater wireless sensor comprises a floating-diving device enabling the underwater wireless sensor to dive to a first predetermined water depth in response to a predetermined condition; a sensing device converting a plurality of environmental parameters into a plurality of environmental messages; a micro controller receiving the environmental messages and sending a command signal including the environmental messages; and a communication device receiving the command signal, sending the command signal via a wireless sensor network, receiving an external message including a second predetermined water depth, and sending the external message to the micro controller so that the micro controller performs a corresponding operation and sends out a control signal to enable the underwater wireless sensor to move to the second predetermined water depth.

Underwater wireless sensor

A shock absorber includes a resilient element; a gear set comprising a first non-return gear and a second non-return gear; and an electric generator driven by the first non-return gear to generate a power when the resilient element is compressed and driven by the second non-return gear when the resilient element is loosened.

Shock absorbing system for energy recycling

Growing community of inventors

Taipei, Taiwan

Yu-Cheng Yang