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In this paper, a new voltage free electronic ballast is introduced. The voltage free electronic ballast is a one converter concept circuit; consist of a neutral-point type buck-boost/boost converter and an inverter. The switching device in the converter are shared with the inverter circuit. It is confirmed by experiments that the proposed electronic ballast can operate both with 200 and 100 voltage...
This paper presents a neutral-point type buck-boost converter that can decrease input current harmonics and reduce the generation of inrush current at start when turning on. It is possible to utilize this circuit as a converter for the electronic ballast, and the switches in the converter are shared with the inverter for the lighting. It is confirmed by experiments that the proposed electronic ballast...
In order to satisfy IEC regulation about harmonics of input current, this paper proposes new neutral-point type step-down converter and its application to electronic ballast. By showing experimental results, the effectiveness of the proposing circuit is reported. The proposing electronic ballast has following advantages. 1) The electronic ballast does not generate the inrush current right after start-up...
Recently in the field of printing machines, models equipped with an induction-heating type ink fixing device are increasing. In these models, the ink fixing heater is heated rapidly when the printing is commanded. The present paper explains that an energy-saving system with higher efficiency can be achieved in the induction-heating ink fixing device, by applying electricity of a higher frequency.
Recently, the demand for excimer irradiation equipment is increasing with the diffusion of LCD TVs and other LCD devices. However, luminous energy of excimer lamps decreases over time. Conventionally, an illuminometer is placed near each lamp to detect and rectify the declining luminous energy. In the present study, the authors succeeded in development of a lighting device that controls this luminous-energy...
The new circuit of the electronic ballast for the compact fluorescent lamp, which is based on the back-boost converter, is proposed. The electronic ballast for compact fluorescent lamp does not need to satisfy the IEC standard Class C, and the regulation is looser than it. However, it is important to reduce the harmonics of input current, because the compact fluorescent lamp seems to be used widely...
In this paper, we propose modified push-pull electronic ballast that can reduce input current harmonics. The proposed electronic ballast has various functions. There are 1) partial smoothing function, 2) charge pump function and 3) PWM control function. Those functions are effective for improvement of the luminous efficiency of a lamp and improvement in the circuit efficiency. The behavior of the...
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