Rotating electric machine

摘要

The rotating electric machine is configured in such a way that a surface of the heat sink, on which the cooling fins of the heat sink are formed, faces the housing; and a plate, which blocks the surface of the housing facing the heat sink and forms a wind passage between the heat sink and the plate, intervenes between the cooling fins and the surface of the housing facing the heat sink; and outside air is aspirated from an inlet formed on the protective cover, and then, the outside air is passed through the wind passage formed between the heat sink and the plate so as to be passed through a window formed on the housing, and is exhausted, by the cooling fan of the rotor, from an outlet formed on the housing.

主权项

1. A rotating electric machine comprising:
a stator that includes armature coils; a pair of housings disposed at both end portions in an axial direction of the stator, for holding the stator; a rotor, including a magnetic field coil and a magnetic field core, disposed at an inner circumference of the stator such that a rotary shaft is freely rotated and held by bearings within the pair of housings; cooling fans provided at end portions in an axial direction of the rotor; power modules that include switching elements for controlling armature current passed through the armature coils; a magnetic field module that includes switching elements for controlling magnetic field current passed through the magnetic field coil; a heat sink, facing a housing that is one of the pair of housings and, which is installed at an opposite side of the rotor and the stator, and mounts the switching elements of the power modules so as to cool the switching elements; and a protective cover for covering the heat sink on which the switching elements of the power modules are mounted; wherein cooling fins are protruded and formed, in the heat sink, on an opposite surface with respect to a surface on which the switching elements are mounted; and the surface of the heat sink, on which the cooling fins of the heat sink are formed, faces the housing which is one of the housings; and a plate, which blocks the surface of the housing facing the heat sink and forms a wind passage between the heat sink and the plate, intervenes between the cooling fins and the surface of the housing facing the heat sink; and outside air is aspirated from an inlet formed on the protective cover, and then, the outside air is passed through the wind passage formed between the heat sink and the plate so as to be passed through a window formed on the housing which is one of the housings, and is exhausted, by the cooling fan of the rotor, from an outlet formed on the housing which is one of the housings.