National Taiwan University

Allis Electric Co., Ltd.

Yen-Liang Chou

Ching-Tsai Pan

Ming-Chieh Cheng

Ching-Ming Lai

Chih-Ting Lin

Chih-Hsing Fang

Wen-Wei Chan

Shih-Kuan Hsu

Jo-Yi Huang

Jen-Jun Pan

Jun-Yu Chen

Hsiu-Ping Yueh

A high-efficiency high step-up ratio direct current converter with an interleaved soft-switching mechanism is provided. The direct current converter includes a voltage-multiplier circuit and an active clamping circuit. The voltage-multiplier circuit includes two isolating transformers, two main switches disposed on a primary side of the two isolating transformers, four diodes disposed on a secondary side of the two isolating transformers and four capacitors disposed on the secondary side of two isolating transformers, configured to boost a voltage of a direct-current power to a desired voltage value. The active clamping circuit, electrically connected to the voltage-multiplier circuit, includes two active clamp switches and a clamp capacitor to lower a voltage surge of the two main switches so that the two main switches and the two active clamp switches can be soft switched on.

High-efficiency high step-up ratio direct current converter with interleaved soft-switching mechanism

A system for creating the learning organizational tool known as a concept map to thereby facilitate learning includes a manipulation-sensing device with a wireless data transceiver, an information integration platform, and a data processing device. The wireless manipulating-sensing device allows users to physically manipulate the concept map and then transmit/receive data related to the results of the physical manipulation via a wireless network. The wireless manipulation-sensing device includes a plurality of conceptual modules for recording data in the process of learning a concept map, a plurality of connecting modules for recording data of the connection relations between the conceptual modules, and a plurality of connecting wires connected between the plurality of conceptual modules and the plurality of connecting modules to form connection relations therebetween. The information integration platform receives the results of the physical manipulation transmitted from the conceptual modules to form concept map information by translation. The data processing device receives the concept map information formed by the information integration platform. In addition, a method for learning a concept map using the system described above is further provided.

System and method for learning concept map

Growing community of inventors

Taipei, Taiwan

Yen-Liang Chou