| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric motor cooling system which will not negatively influence the performance and the efficiency of a motor, and will not put excess load on a cooling source. SOLUTION: The electric motor cooling system comprises a housing and a first and a second cooling source, and the first and second cooling sources are different from each other and supply a first and a second cooling flow, respectively. A stator is mounted inside the housing and receives the first cooling flow, while a rotor is turnable with respect to the stator and receives the second cooling flow. In some embodiment, the housing supports a journal bearing for supporting the rotor, and the second cooling flow is caused to flow through the journal bearing. For example, the first cooling flow is supplied from a low-pressure source, such as ram air, and the second cooling flow is supplied from a high-pressure source, such as bleed air. A circumferential gap is installed in between the rotor and the stator. COPYRIGHT: (C)2009,JPO&INPIT
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