http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Isomura, Yoshinori,Yamamoto, Kichiro,Morimoto, Shigeo,Maetani, Tatsuo,Watanabe, Akihiko,Nakano, Keisaku Journal of International Conference on Electrical 2014 Journal of international Conference on Electrical Vol.3 No.3
The voltage source PWM inverter generally used to drive the air conditioning (A/C) fans has been posing a large issue that the bearings in air conditioning fan motors are highly possible to be corroded electrically. Potential difference called shaft voltage is generated between inner and outer rings of the bearings due to inverter switching. The shaft voltage causes bearing lubricant breakdown dielectrically. As a result, bearing current is caused. This current causes the bearing corrosion. In previous work, we demonstrated that the shaft voltage can be reduced by using an insulator inserted between the outer and inner cores of the rotor in an air conditioning fan motor without grounding. This paper proposes the other countermeasure for reducing the shaft voltage in fan motors. The countermeasure which adds a capacitor between the brackets and the stator core is effective even for fan motors with non-insulated rotor. The effectiveness is confirmed by both simulated and experimental results.
Kaoru Ichikawa,Wen-Chang Yang,Akihiko Morimoto,Yutaka Yoshikawa,Shigeo Sugitani,Wen-Shan Chiang,Jian-Wu Lai,En Yu Liang,Cho-Teng Liu,Chang-Wei Lee,Kei Yufu,Moeto Kyushima,Satoshi Fujii,Tomoharu Senju 한국해양과학기술원 2013 Ocean science journal Vol.48 No.1
Japanese and Taiwanese institutes have collaborated to obtain ocean radar data with significantly increased coverage in the upstream Kuroshio region. An international joint survey was conducted in June 2012, in which intensive in situ observations were performed within the radar coverage. Details of the joint survey are presented in this paper with brief descriptions of preliminary results on the surface and subsurface currents near and within the Kuroshio.