Chih-Chiang Hua

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Cascade multilevel inverters have been widely applied for the applications of high voltage and high power systems. The input power sources for a cascade multilevel inverter requires separate dc voltage sources, available dc sources include batteries, photovoltaic arrays and fuel cells...etc. If variations or fluctuations occur at the input voltage, the(More)
This paper proposes a residual capacity estimator with higher accuracy for lead-acid batteries. The calculation method is using different discharge capacity rate of a battery in different discharge current to calculate state of charge. Therefore, curve fitting state of charge estimation has the ability of revising value of state of charge with the changing(More)
This paper presents the design and implementation of converters for grid-connected single-phase photovoltaic energy conversion system. In order to provide the functions of the energy management and the load distribution, the system is combined with the photovoltaic cells and utility network. Due to that the output voltage and current of the photovoltaic(More)
This paper proposes a regenerative braking system for electric bicycle based on DSP. The proposed method is used to adjust the switching sequence of the inverter, so that the braking energy will be returned to charge the battery. With the cooperation of regenerative braking energy recovery technologies and digital signal processor (TMS320LF2407) as the(More)
This paper presents the design and implementation of power converter for wind generator. The proposed system consists of a wind generator, a buck converter, a bi-directional dc/dc converter and lead-acid battery. The wind generator is the main power source of the system, and the battery is used for energy storage and power compensation. In order to make the(More)
This paper presents the design and implementation of power converters for wind generator (WG) controlled by a digital signal processor. The system is composed of a wind generator, lead-acid batteries, a dc/dc boost converter and a bidirectional dc/dc converter. The wind generator is the main power source of the system, and the battery is used for energy(More)
In this paper, a reflex charger based on bidirectional converter is proposed. The Reflex charging strategy has a positive pulse interval, a negative pulse interval and a resting time in a complete charging period. In the positive pulse interval, the bidirectional converter is operated as a phase shift full bridge converter (PSFB). The zero voltage switching(More)
This paper proposes a novel high step-up converter with an average mode control which is designed for power generation applications. The detailed steady-state analysis for the system is presented. According to the steady-state analysis, transfer functions of input voltage versus output voltage and duty cycle versus output voltage are obtained. In addition,(More)
This paper presents the design and implementation of a digital high performance photovoltaic lighting system based on a microcontroller. In order to achieve high lighting efficiency, this lighting system module used the HBLED which possesses small size, long life and low power consumption. The proposed system consists of a photovoltaic module, a LED(More)