Salient pole magnetic field rotation type AC generator

摘要

PURPOSE:To facilitate manufacture and to improve pass rate by making a plurality of axially extending open grooves in the outer peripheral part of a rotor core, forming aluminum alloy diecast rods in the open grooves and integrally coupling aluminum alloy diecast plates to the opposite ends of the rods. CONSTITUTION:A plurality of open grooves 2a are made in the outer peripheral part of a rotor core 2 where the open groove has a cross section in the form of a hooked hole defined by a small circle and two parallel lines. The rotor core 2 is then inserted into a diecast die and pressed axially, thereafter an aluminum alloy is extruded to integrally form a brake winding comprising a plate 3a and a rod 4a. According to the constitution, diecast work is facilitated and pass rate is improved because an inexpensive aluminum alloy having good casting performance is employed.