Coreless motor and manufacture of coil thereof

Abstract

Abstract PURPOSE: To increase the effective part of coil and highten the efficiency by a process wherein a coil is formed in the shape of a hollow disk, the hollow part is arranged with a yoke through a gap, while a field magnet is arranged so as to produce a magnetic flux reversed each other from both axial directions. CONSTITUTION: A hollow disk-shaped coil spool 10 is wound round by a coil W for forming a hollow disk-shaped coil 11. The way of winding the coil W is that it reaches the periphery starting from the central part through the surface of the spool in the diameter direction along W 1a and after turning back it reaches the periphery on the opposite side through the lower face of the spool along W 1b and W 1c , again after returning to the center part through the surface of the spool along W 1d to repeat it so much angle as required for winding round. The hollow part of said hollow disk-shaped coil 11 a yoke 8 is arranged through an interval while on both sides in the axial direction the field magnets 3 and 4 generating the magnetic flux opposing each other. Thereby almost the whole surface of the coil 11 can be utilized efficiently for generating torque to improve the motor efficiency. COPYRIGHT: (C)1981,JPO&Japio

Inventors

• 👤 Tadashi Fukami

Bibliographic Details