Sughrue Mion, PLLC
Controller-integrated rotating electrical machine
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.
Mitsubishi Electric Corporation
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Tomoaki Masahiko
Shimano Fujita