Zobrazeno 1 - 10
of 196
pro vyhledávání: '"Hung-Liang Cheng"'
Autor:
Hung-Liang Cheng, Chun-An Cheng, Chien-Hsuan Chang, En-Chih Chang, Lain-Chyr Hwang, Yi-Chan Hung
Publikováno v:
Applied Sciences, Vol 14, Iss 15, p 6656 (2024)
A novel ac/dc LED driver with power factor correction and soft-switching functions is proposed. The circuit topology mainly consists of two modified single-ended primary inductance converters (SEPIC) with interleaved operation. The first half stage o
Externí odkaz:
https://doaj.org/article/b88b24b0eb83498c9d0d2d643e1069be
Publikováno v:
Micromachines, Vol 14, Iss 10, p 1906 (2023)
Piezoelectric ceramic actuators utilize an inverse piezoelectric effect to generate high-frequency vibration energy and are widely used in ultrasonic energy conversion circuits. This paper presents a novel drive circuit with input-current shaping (IC
Externí odkaz:
https://doaj.org/article/8a08b992d8014c1884b39e5fd0d74160
Autor:
Hung-Liang Cheng, Yi-Chan Hung
Publikováno v:
Applied Sciences, Vol 13, Iss 12, p 6879 (2023)
The research proposed a novel LED driver with the functions of power-factor correction (PFC) and current balancing. A flyback converter and a Class-D series resonant converter were integrated by sharing an active switch to form a single-stage circuit
Externí odkaz:
https://doaj.org/article/eab6707714f740ada7a601a049a565eb
Publikováno v:
Micromachines, Vol 13, Iss 10, p 1568 (2022)
Conventional photovoltaic (PV) grid-connected systems consist of a boost converter cascaded with an inverter, resulting in poor efficiency due to performing energy processing twice. Many pseudo DC-link inverters with single energy processing have bee
Externí odkaz:
https://doaj.org/article/7e8e9d02d32249bb8101efd47f1d0643
Publikováno v:
Micromachines, Vol 13, Iss 5, p 797 (2022)
A novel interleaved DC-DC buck converter is proposed to drive high-brightness light-emitting diodes (LEDs). The circuit configuration mainly consists of two buck converters, which are connected in parallel and use interleaved operation. Through inter
Externí odkaz:
https://doaj.org/article/54c862d937df43c9b67f503da2b98dd9
Autor:
En-Chih Chang, Hung-Liang Cheng, Chien-Hsuan Chang, Rong-Ching Wu, Chun-An Cheng, Zheng-Kai Xiao, Wen-Jie Lu, Zhi-Yu Wei
Publikováno v:
Micromachines, Vol 13, Iss 3, p 435 (2022)
PWM (pulse-width modulation) voltage source inverters are used in a wide range of AC power systems where the output voltage must be controlled to follow a sinusoidal reference waveform. In order to achieve precision and fast-tracking control, restric
Externí odkaz:
https://doaj.org/article/1228f72c876146a49364931fa3842426
Autor:
Chun-An Cheng, Hung-Liang Cheng, Chien-Hsuan Chang, En-Chih Chang, Chih-Yang Tsai, Long-Fu Lan
Publikováno v:
Micromachines, Vol 12, Iss 10, p 1229 (2021)
This paper proposes a novel and cost-effective drive circuit for supplying a piezoelectric ceramic actuator, which combines a dual boost AC-DC converter with a coupled inductor and a half-bridge resonant DC-AC inverter into a single-stage architectur
Externí odkaz:
https://doaj.org/article/cd4d73f969714190a1abfd0e1dbae5cc
Autor:
Chun-An Cheng, Hung-Liang Cheng, Chien-Hsuan Chang, En-Chih Chang, Wei-Shiang Hung, Chin-Chih Lai, Long-Fu Lan
Publikováno v:
Energies, Vol 14, Iss 2, p 477 (2021)
Light-emitting diode (LED) has the characteristics of environmental protection and energy saving, having become the lighting source of a new generation of street-light lamps. The traditional two-stage power supply for providing an LED street-light la
Externí odkaz:
https://doaj.org/article/a4d35310a81245d09cd06c89532cb373
Publikováno v:
Applied Sciences, Vol 10, Iss 22, p 8144 (2020)
An isolated type bidirectional resonant converter is presented in this paper. Using a dual active bridge as the main topology and integrating symmetric resonant mechanism, the developed converter features an isolated type bidirectional resonant conve
Externí odkaz:
https://doaj.org/article/3f951fafc3164811af4def8194e901a5
Publikováno v:
Applied Sciences, Vol 10, Iss 12, p 4220 (2020)
Traditional photovoltaic (PV) grid-connection inverters with sinusoidal pulse-width modulation (SPWM) control suffer the problem of buck-typed conversion. Additional line-frequency transformers or boost converters are required to step-up output volta
Externí odkaz:
https://doaj.org/article/1b057f9c22e243509e508c8a16b4e92d