| 摘要 |
PCT No. PCT/JP91/00640 Sec. 371 Date Jan. 14, 1992 Sec. 102(e) Date Jan. 14, 1992 PCT Filed May 15, 1991 PCT Pub. No. WO91/18439 PCT Pub. Date Nov. 28, 1991.To reduce torque ripples appearing in an output torque of an electric synchronous motor, the rotor (10) is divided into 2n rotor elements (101, 102, 103, and 104) the rotor elements of each of 2n-1 pairs of rotor elements (101, 102; 103, 104) being circumferentially shifted from one another around an axis of the rotor by an angle corresponding to a half of the wavelength ( lambda ) of a first (A) of "n" kinds of cyclic torque ripples (A and B) to cancel the first kind of torque ripple, and the 2n-1 pairs of rotor elements (101, 102; 103, 104) being arranged to be grouped in 2n-2 sections of rotor elements, each section including two pairs of rotor elements, and the 2n-2 sections of rotor elements being circumferentially shifted from one another around the axis of the rotor by an angle corresponding to a half of a wavelength ( lambda ) to cancel a second of the "n" kinds of torque ripple, and eventually, the rotor structure being structured so that the rotor elements are further circumferentially shifted from one another to cancel the "n"th torque ripple component.
|
