ABSTRACT -- Recently, a method of magnetically-enhanced discharge columns is considered to increase the luminous efficacy of discharge lamps, which is based upon the face that the diffusion motion of charged particles in the discharge column strongly depends on the applied magnetic fields. This study investigates the effect of applied transverse magnetic fields on the light output of low-pressure Hg-Ar discharge. As a result, it is found that the electric field in the positive column increases according to the applied megnetic field, which causes an increase in the total light output. And this effect is much more pronounced upon the spectral line originating form the higher levels.

Temperature distribution of 250W high-pressure mercury lamp has been measured by the spectroscopic method using relative intensities of spectral lines. To obtain radial temperature distribution, the measured intensity which was integrated along the line of sight was transformed into radial line intensity by Abel's inversion. Temperature was determined from relative intensities of spectral lines of the same atomic species. The measured temperature of 250W high-pressure mercury lamp is 6000K at the axis. In this experiment temperature profile of high-pressure arc is papabolic as known.

The electron energy distribution function in mercury discharge positive columns are calculated numerically from the Boltzmann eqation under a set of parameters, such as the electron temperature to. the atomic temperature Tw. the electron number density no. and the electric field E. Especially, using the approximation that collision cross sections only depend on the energy, the calculated electron energy distribution function was shown that it falls off rapidly in the high energy tail.

고압 나트륨-수은 방전에서 파인 D선의 파란 날개아 빨간 날개 최대값의 이동과 분압 사이의 관계들을 나타내는 식을 유도했고 이식으로 실험을 해서 타당성과 유용성을 검증했다. 반데르 왈스 모델이 나트륨과 수은 원자 사이의 상호작용에 대한 계산으로서 사용된다. 모노크로메타로부터 쉽게 측정되어지는 변수 (빨간 날개 최대값의 이동과 파란 날개 최대값의 이동)로부터 나트륨-수은 방전에서의 나트륨, 수은 압력을 구하는데 유용하고 편리한 식을 유도하였고 이를 이용하여 400W 나트륨등의 나트륨 분압을 구하였다.

Low-cost and automated isolux diagram measurement system are investigated. The system is constructed with illuminance measurement array, analog multiplexer, A/D converter and 16-bit microcomputer. The experimental results show good agreement with the measured illuminance values. Decreasing the measure-spacing, the more accurate diagram can be obtained.

In the thesis reserch on the C.T.I. in phenolic resin as a parameter of atmospheric (IEC publication 112) 1) In according as one's decrease atmosph-eric, A number of drops with this as the start for a formative dry band and be pro-duced scintillation increased in a voltage over 300[V]. 2) In a 900[mb] increased this best a num-ber of drops for tracking. In accoding as one's decrease atmospheric increased C.T.I. value.

In this paper, the technique of particular harmonics elimination in three-phase PWM Inver-ter output waveform and the method for speed control of a squirrel cage I.M. are introduces. The required switching patterns are determind on personal computer and the results are stored in look-up table in EPROM for controlling the switching of the Inverter devices. In this system, the microprocessor(Intel 8086)computes the actual Motor speed from the pulses generated in a Incremental Encoder, compares the actual speed with the reference speed. And the PI(Proportional-Integral) controller is used to adjust the frequency of the Inverter that feeds the Motor.

Daylight is regarded by most people as preferred light source for interior lig-hting. With poper design, daylight can save electric lighting during daytime. This paper attemptes to show that bett-er use of daylight might be the balanced use of supplementary artificial lighting at times and places where the natural 1-ighting is inadequate with consequent c-ost and energy saving.

This paper presents resarch results on the use of a corona detector and a pulse counter in order to diagnose for oil transformers. Using these experimental apparatus, tests were carried out on a typical transformer oil containing different carbonized paper and various moisture contents to measure the picocoulomb val-ues and pulse count. Through the result of this study it was found that the picocoulomb values and pulse count of corona were depended on the getting stained in transformer oil. The amplitude of the partial discharge amount and the number of pulse were decreased up to 70 [。c] and then was increased as the oil temperature goes up. It was concluded that the determinati-on level for diagnosis of oil transform-er was taken into account the temperatu-er of transformer oil, The use of pulse counter method, which have been taken the same property of voltage and temperature variation for the corona measurement mothod, considera-bly increase insulator avilability.