National Chung Shan Institute of Science and Technology

Chung Shan Institute of Science and Technology

Kun-Feng Chen

Hsuang-Chang Chiang

Chao-Tsung Ma

Chin-Yu Ho

Kuo-Kuang Jen

Yi-Lun Chen

Hsu-Pin Yang

Jung-Yang Wang

Chih-Hsien Chung

Yu-Min Liao

Ying-Sun Huang

Shao-Chung Hu

Jung-Zong Wu

Yin-Sun Huang

Kuo-Yang Horng

Woei-Luen Chen

Ling-Yueh Yang

Wei-Ching Liu

Pen-Shan Chao

Jun-Hao Chen

Rong-Yang Wang

Louis Lu-Chen Hsu

Jong-Chin Hwang

Po-Cheng Chen

A three arm rectifier and inverter circuit is provided. The three arm rectifier and inverter circuit includes an input end, a rectifier circuit and an inverter circuit. The input end is utilized for inputting an input voltage and an input current. The rectifier circuit includes a low frequency switching arm. The low frequency switching arm is coupled to the input end for receiving the input voltage and the input current and generating a trigger signal. The inverter circuit includes a full bridge switch. The full bridge switch is coupled to the low frequency switching arm for receiving the trigger signal and adjusting an output voltage.

Three arm rectifier and inverter circuit

A high power factor converter is provided. The high power factor converter includes a rectifier, a reactive power control circuit and a converter circuit. The rectifier is utilized for receiving and converting an input AC voltage in to an input DC voltage. The reactive power control circuit is coupled to the rectifier for performing a reactive power control operation based on the input DC voltage. The converter circuit is coupled to the reactive power control circuit for converting the input DC voltage into an output voltage.

High power factor converter

The present invention provides a novel wind power charging circuit with three-phase, single-stage and bridgeless framework. This novel wind power charging circuit is developed based on an isolated single-ended primary-inductance converter (SEPIC) having buck-boost converting function, and can be applied in a wind turbine system for increasing the operation scope of the input voltage provided by a wind turbine of the wind turbine system, so as to facilitate the wind turbine system include wide-range operation scope under different wind speeds, such that the electric energy production and the electromechanical conversion efficiency of the wind turbine system are able to be effectively enhanced. In addition, because this novel wind power charging circuit does not include any bridgeless PFC circuits and bridge-type diode rectifiers, the low conducting loss as well as the whole circuit volume and assembly cost of the wind turbine system can be simultaneously reduced.

Wind power charging circuit with three-phase, single-stage and bridgeless framework

The present invention discloses a single-phase non-isolated inverter, comprising: a first DC-side capacitor, a second DC-side capacitor, a first switch unit, a second switch unit, a third switch unit, a fourth switch unit, a fifth switch unit, a sixth switch unit, a seventh switch unit, and an eighth switch unit. When the single-phase non-isolated inverter is operated at a zero-voltage switching state, the seventh switch unit and the eighth switch unit are switched to short circuit for forming a short-circuit path between the bus lines. Briefly speaking, this novel single-phase non-isolated inverter has reactive power capability. In addition, according to an adjusting signal of a PI controller, micro controller of the single-phase non-isolated inverter is able to properly adjusts the duty cycle of a switch unit driving signal of the fifth switch unit and the sixth switch unit, so as to cancel the capacitor voltage unbalance between two DC-side capacitors.

Single-phase non-isolated inverter

A half-bridge resonant bidirectional DC-DC converter circuit comprising a half-bridge buck-boost converter and a resonant DC-DC converter. The half-bridge buck-boost converter is coupled to an external DC power source to achieve a wide input voltage range. The resonant DC-DC converter is coupled to the half-bridge buck-boost converter to act as a later stage circuit of the half-bridge buck-boost converter. The resonant DC-DC converter is used to control the direction of the bidirectional power flow and respond to the half-bridge buck-boost converter under a fixed frequency mode to convert the input of the half-bridge buck-boost converter to an induced current.

Half-bridge resonant bidirectional DC-DC converter circuit having a half-bridge buck-boost converter and a resonant DC-DC converter

The present invention provides a programmable continuous wave high power laser diode system, which comprised digital control unit, a switch module unit, and a latch current controlling unit so as to provide user to set the latch current of the high power laser diode via the digital control unit controlling the switch module unit and the latch current controlling unit, therefore, the laser diode system includes advantages of high system efficiency, reliability, low output ripple current range and fast switching reaction time.

Programmable continuous wave high power laser diode system

A motor simulator without requiring a motor is a testing motor controller used for inputting a driving signal according to a power supply driving signal, feeding back a status response of a dynamic calculator of the motor simulator, outputting a voltage and current reference command value required by the motor simulator to the motor simulator, so that the dynamic calculator and the electric power converter installed in the motor simulator generate a voltage and a current of an actual motor in an operating status. Therefore, the testing motor controller keeps converting and adjusting the electric energy for driving an operation of the motor simulator according to a status response fed back by the dynamic calculator of the motor simulator, so as to achieve a control function of the testing motor controller for testing the rotation speed and positioning of the motor.

Motor simulator without requiring a motor

A power conversion system for controlling harmonics, which uses the Fourier transform analysis to calculate the harmonics element of each current, and adds the harmonics compensation strategy into the control strategy of the DC-AC power converter so as to decrease the harmonics element generated from the actual current.

Power conversion system for controlling harmonics

A power monitor and management system includes an automatic modulation device, a monitoring device, multiple modules and an LAN (local area network) connected to the monitoring device and the modules to enable the monitoring device to communicate with the modules. The automatic modulation device determines a dominating module in according to registration sequences of the modules and subordinating modules and to modulate power of the dominating module and the subordinating modules as well as the overall power output in accordance with number of the modules.

Real time power monitor and management system

A microelectronic 3D packaging structure and a method of manufacturing the same are introduced. The microelectronic 3D packaging structure includes a first board with a plurality of a first edges and disposed with a first electronic device; a second board with a plurality of a second edges and disposed with a second electronic device, wherein at least one second edge of the second board is jointed to at least one first edge of the first board to form a joint line; and a joint connection portion disposed at the joint line of the two adjacent boards and adapted to function as a connection path for transmitting signals.

Microelectronic 3D packaging structure and method of manufacturing the same

The present invention relates to an LED luminaire driving circuit with high power factor, comprising: a filter unit, a rectifier unit, a transformer unit, a power switch unit, a zero current detecting unit, a feedback unit, an error amplifier unit, and a power switch driving unit. Particularly, the LED luminaire driving circuit proposed by the present invention does not include any optocoupler feedback circuits, so it is able to effectively reduce the entire circuit manufacturing cost of this LED luminaire driving circuit. Moreover, this LED luminaire driving circuit can selectively work under CCM operation or DCM operation with high power factor (PF&#x2dc;1), and provide stable output voltage signal and output current signal to load end. In addition, this LED luminaire driving circuit performs excellent stability and current modulation error rate (&#x3c;&#xb1;3%).

Growing community of inventors

Taoyuan, Taiwan

Kun-Feng Chen