| 摘要 |
PURPOSE:To enable attachment of an oil duct inside a coil without extending an average length of winding coils by arranging the oil duct to be attached inside the coil on the same plane as a riser lead wire. CONSTITUTION:Because winding coil is arranged on the same plane as a riser lead wire, thickness A of an oil duct is not added to a coil average length l2 and the equation l2=l0+(1+1/2)X2A=l0+3A is satisfied. The coil average length shortends only by 2A and the necessary quantity of winding is reduced. The area of oil-flowing-part of oil duct decrease only by the widths riser lead wires 1 and 2, but the reduced area can be offset by oil ducts 9a and 9b which are arranged on the same plane as a winding-end lead wire 3 and the cooling effect of coil can be maintained. By convection of the coil, overheat is restrained and also reliability of connection is improved. |
