| 摘要 |
PROBLEM TO BE SOLVED: To suppress loss-torque caused by magnetic attraction at a bearing part and iron loss by forming a electric motor part stored in a sealed container as a two- pole permanent magnet type wherein a permanent magnet is built in a rotary iron core of a rotor, and extendedly disposing a bearing part of a compression mechanism in a bore part formed on an end part of the rotor iron core. SOLUTION: In an electric compressor wherein a compression mechanism part 52 is disposed on a lower part in a sealed container 51 and a self-starting permanent magnet type synchronous electric motor 53 is disposed on an upper part thereof, the synchronous electric motor 53 is composed of a stator 67 wherein a coil is wound around a fixing iron core made of a laminated electromagnetic steel plate having a thickness L1, and a rotor 55 wherein two flat plate shaped permanent magnets 70a is built in a rotor iron core 68 made of a laminated electromagnetic steel plate. A bore part 69 is formed on an end part of a compression mechanism 52 side of the rotor 55, and a part of a non-magnetic material made bearing part 57 of the compression mechanism 52 is extendedly disposed in the bore part 69. Since there is no magnetic attraction between an inside of the bore part 69 and the bearing part 57, it is possible to suppress generation of loss torque and iron loss (especially, eddy current loss).
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