Controller-integrated rotating electrical machine

摘要

An inverter device is provided with a hollow portion in a center portion of a rotation shaft of a rotating electrical machine. The rotating electrical machine has a first cooling air passage for cooling air generated by a cooling fan to flow in from an outer side in a radial direction of the rotating electrical machine, then to cool a heat sink, and to be discharged through ventilation holes provided to a rear bracket on an outer peripheral side by passing an inner periphery of the rear bracket, and a second cooling air passage for cooling air to flow into the hollow portion from the rear in the axial direction, then to cool a brush holder and a magnetic pole position detection sensor, and to be discharged through the ventilation holes by passing the inner periphery of the rear bracket.

主权项

1. A controller-integrated rotating electrical machine, comprising:
a stator and a rotor supported on a front bracket and a rear bracket wherein: the rotor has a field winding generating a magneto-motive force and a cooling fan and is supported in a rotatable manner on a rotation shaft supported on a front bearing provided to the front bracket and a rear bearing provided to the rear bracket; a magnetic pole position detection sensor detecting a magnetic pole position of the rotating electrical machine and a brush holder having brushes that pass a current to the field winding are installed at a rear of the rear bearing in an axial direction of the rotation shaft; an inverter device controlling and passing a stator current to an armature winding of the rotating electrical machine is mounted on an outer side of the rear bracket at the rear in the axial direction of the rotation shaft; the inverter device includes switching elements passing the stator current, a heat sink cooling the switching elements, and a control board on which is mounted a control circuit that controls operations of the switching elements and the rotating electrical machine; the inverter device is provided with a hollow portion in a center portion of the rotation shaft of the rotating electrical machine; the rotating electrical machine has a first cooling air passage for cooling air generated by the cooling fan to flow in from an outer side in a radial direction of the rotating electrical machine, then to cool the heat sink, and to be discharged through ventilation holes provided to the rear bracket on an outer peripheral side by passing an inner periphery of the rear bracket, and a second cooling air passage for cooling air to flow into the hollow portion from the rear in the axial direction, then through the area immediately surrounding the brush holder and the magnetic pole position detection sensor so as to cool the brush holder and the magnetic pole position detection sensor, and to be discharged through the ventilation holes by passing the inner periphery of the rear bracket; and the brushes and the magnetic pole position detection sensor are installed in such a manner that a sliding direction of the brushes and a direction in which terminals of the magnetic pole position detection sensor extend are aligned in substantially a same direction.