| 摘要 |
PURPOSE:To reduce the inertia of an armature while maintaining the stability of mechanical strength and size at a high temperature by continuously decreasing the density of resin for integrating an armature coil from a commutator side toward the outer peripheral side. CONSTITUTION:When at least an armature coil 1 is integrally hardened with thermally curable resin 2, the density of thermosetting resin 2 to be used is continuously decreased from the inside commutator side coil end 5 toward the opposite commutator side coil end 6 at the outer periphery. |
