| 摘要 |
PURPOSE:To increase the frequency of ripple and to increase the torque constant of a 3-phase brushless motor by composing the motor of a rotor in which 10.m pieces of magnetic poles are magnetized and a stator having 6.n pieces of driving coils. CONSTITUTION:A stator 1 has 6 driving coils 3-1-3-6 arranged at an equal distance in the circumferential rotating direction of a rotor 2. The rotor 2 is formed of an annular magnetic member magnetized at 10 poles at a pitch of 36 deg.. The position of magnetic sensitive elements Ha-Hc for detecting the rotating angular position of the rotor 2 is so determined as to generate 3-phase position signals having phase displacements of 0 deg., 12 deg., 24 deg. obtained by dividing 36 deg. of pole pitch into trisections. The coils 3-1-3-6 are so composed that the angles of the central lines of the width of the coils become 36 deg. which is equal to the pole pitch. |
