TY - JOUR
T1 - Water tree characteristics in low-density polyethylene under power-frequency voltages with high-frequency components
AU - Suzuki, Hidenori
AU - Ohki, Yoshimichi
AU - Nakamichi, Yoshinobu
AU - Ajiki, Kohji
PY - 1996/12/1
Y1 - 1996/12/1
N2 - For magnetic levitation railway systems using linear synchronous motors, pulse-width-modulation inverters and polymer insulated cables are used for driving cars and feeding electricity, respectively. This implies that ac voltages with many harmonics induced by inverters are applied to cables. However, little is known about dielectric properties of polymers under such ac voltages. Therefore, water-tree characteristics have been investigated for low-density polyethylene using power-frequency ac voltages with high-frequency components. It was found that water tree grows very fast under high-frequency voltage. However, in the case of the superposed voltage, water tree does not grow so fast if the high-frequency component is not large. It is considered that the zero-crossing of the applied voltage plays an important role for the tree growth.
AB - For magnetic levitation railway systems using linear synchronous motors, pulse-width-modulation inverters and polymer insulated cables are used for driving cars and feeding electricity, respectively. This implies that ac voltages with many harmonics induced by inverters are applied to cables. However, little is known about dielectric properties of polymers under such ac voltages. Therefore, water-tree characteristics have been investigated for low-density polyethylene using power-frequency ac voltages with high-frequency components. It was found that water tree grows very fast under high-frequency voltage. However, in the case of the superposed voltage, water tree does not grow so fast if the high-frequency component is not large. It is considered that the zero-crossing of the applied voltage plays an important role for the tree growth.
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M3 - Conference article
AN - SCOPUS:0030403899
SN - 0084-9162
VL - 2
SP - 742
EP - 745
JO - Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), Annual Report
JF - Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), Annual Report
T2 - Proceedings of the 1996 Annual Conference on Electrical Insulation and Dielectric Phenomena. Part 2 (of 2)
Y2 - 20 October 1996 through 23 October 1996
ER -