초록
본 논문에서는 침대평판 전극구조를 구성하여 침전극에 직류 정 ·부 고전압을 인가한 경우 전계와 자계가 직각방향으로 형성되도록 하고 자계가 코로나 방전현상에 미치는 영향을 측정하고 분석하였다. 정의 고전압을 인가한 경우 자계인가에 의해 방전코로나 영역이 확장되고 이때 흐르는 코로나전류가 감소하였고, 절연파괴전압은 증가되었다. 그러나 부의 고전압을 인가한 경우는 방전코로나 영역이 오히려 축소되고 흐르는 전류가 증가되었으며 절연파괴전압은 감소되었다. 이는 전자계가 동시에 존재하는 영역에서 코로나방전에 의해 생성된 전하들의 로렌쯔력에 의한 싸이크로트론 운동 때문인 것으로 생각된다.
In this paper, the effect of magnetic field on corona discharge phenomena was experimentally investigated in the needle-plate electrode geometry. Needle-plate geometry discharge system with magnetic field at a right angle to the electric field was made. The corona discharge characteristics with magnetic field were investigated and compared with the corona characteristics without magnetic field in atmospheric pressure. As a result, in case of positive DC corona discharge with magnetic field, corona discharge zone was significantly wider, corona current was lower, and breakdown voltage was higher than those without magnetic field. However, in case of negative DC corona discharge with magnetic field, corona current was slightly higher and breakdown voltage was lower than those without magnetic field. It is thought that this result is due to cyclotron motion of charged particles such as electron and ion by magnetic field.