Kabushiki Kaisha Yaskawa Denki

Daisuke Morishita

Yasuhiro Miyamoto

Hiroshi Tsumagari

Yuki Ochiai

A rotor core according to an embodiment has a plurality of magnet openings and cavity portions. The magnet openings are in juxtaposition with each other in a circumferential direction. Permanent magnets are inserted in the magnet openings. The cavity portions are each formed relative to an area sandwiched between two magnet openings, out of the magnet openings, in which the permanent magnets that are mutually adjacent and that have magnetic pole directions relative to a radial direction opposite to each other are inserted.

Rotor core, rotor, and rotating electric machine

This power generator is so formed that a number q of slots per pole per phase obtained by dividing the number of slots by the number of poles of permanent magnets and the number of phases of voltages is a fraction satisfying 1&#x3c;q&#x2266;3/2.

Power generator and wind power generation system

This rotating electric machine includes a rotor including a rotating shaft portion, a rotor yoke surrounding the rotating shaft portion and a rotor core, arranged on the outer peripheral surface of the rotor yoke, having a plurality of permanent magnets circumferentially arranged thereon at intervals, and a stator arranged to be opposed to the outer peripheral surface of the rotor, while the rotor yoke and the inner peripheral portion of the rotor core are fixed to each other with a fixing member.

Rotating electric machine and wind power generation system

A rotor core according to an embodiment includes a pair of magnet openings disposed such that a space therebetween widens toward an outer peripheral side and in which a pair of permanent magnets having a magnetic pole direction relative to a radial direction identical to each other are inserted. The magnet openings each have a shape that connects together a first opening portion formed along the profile of the corresponding permanent magnet and a second opening portion that, when the permanent magnet is inserted in the first opening portion, covers, out of corner portions of the permanent magnet, a corner portion closest to the other permanent magnet with an air gap defined therebetween. The second opening portion forms a bridge portion between the second opening portion and the second opening portion of the other magnet opening.

This disclosure discloses a rotating electrical machine comprising: a stator; and a rotor; one of said stator and said rotor having a coil, the other having a plurality of magnetic pole units each forming first and second magnetic poles configured to be aligned alternately and to have mutually opposite polarities at a side of the one of said stator and said rotor, each of said magnetic pole units comprising: a unit core that a projecting part configured to protrude toward the side of the one of said stator and said rotor is formed; and a permanent magnetic provided between each of said projecting parts on the side of the one of said stator and said rotor from said unit core, said first magnetic pole being formed by said permanent magnet, and said second magnetic pole being formed by each of said projecting parts.

Growing community of inventors

Kitakyushu, Japan

Daisuke Morishita