Patent ID: 7397157

Claim:
A tandem rotary electric machine comprising: a primary stator-rotor pair and a secondary stator-rotor pair, each pair comprising a rotor core on which field windings are wound and a stator core on which stator coils are wound, each rotor core being fixed to and driven by a same rotary shaft, and adjacently arranged to each other; a housing covering both the primary stator-rotor pair and the secondary stator-rotor pair, and to which the stator cores of both the primary stator-rotor pair and the secondary stator-rotor pair are fixed; and a rectifier device, configured to rectify output current from the primary stator-rotor pair and the secondary stator-rotor pair, fixed directly to one end of the housing or fixed to one end of the housing through an interposition member in order to dissipate heat generated by the rectifier device, wherein the secondary stator-rotor pair, capable of generating and outputting a higher rated electric power than a low rated electric power generated by the primary stator-rotor pair, is disposed between the primary stator-rotor pair and the rectifier device, and the stator core of the secondary stator-rotor pair has larger size and weight than those of the stator core of the primary stator-rotor pair.