Title:
永久磁石回転子
Document Type and Number:
Japanese Patent JP3619885
Kind Code:
B2
Abstract:
PURPOSE: To provide a permanent-magnet rotor of a rotating machine wherein the enough high magnetic-flux density from its permanent magnet can be transmitted to its laminar rotor core and its cogging torque is made small and the form of permanent-magnet rotor is worked easily. CONSTITUTION: In a permanent-magnet rotor of a rotating machine whose laminated core 6 has opening parts for permanent magnets each opening for the permanent magnet is skewed in the shaft direction of the laminar rotor core 6, and a resin magnet manufactured by injection molding a magnetic powder is used as the permanent magnet. Field magnets 7, 71, 72, 73 are formed out of the resin magnets so injection-molded as to be one with the laminated core 6. Thereby, the shape and skew-direction of the opening part for the permanent magnet can be formed arbitrarily, and concurrently, the form of the field magnet can be worked easily responding to the shape and skew-direction of the opening part because the resin magnet is so injection-molded as to be one with the lamiar rotor core 6. Hence, the magnetic flux density of the laminated core 6 can be made high, and the cogging torque of the rotating machine can be reduced largely.
Inventors:
Shoichi Kawamata
Fumio Tajima
Kazuo Onishi
Fumio Tajima
Kazuo Onishi
Application Number:
JP5054095A
Publication Date:
February 16, 2005
Filing Date:
February 15, 1995
Export Citation:
Assignee:
株式会社日立製作所
日本サーボ株式会社
日本サーボ株式会社
International Classes:
H02K29/00; H02K1/27; H02K15/03; (IPC1-7): H02K1/27; H02K15/03; H02K29/00
Domestic Patent References:
| JP5009149U | ||||
| JP4029537A |
Attorney, Agent or Firm:
Shigeru Sasaoka