Ventilated type traction motors are widely used for railway vehicles. However, they require overhauls for inside cleaning. Besides, they are a major noise source in railway vehicles. To solve these problems, we propose a totally-enclosed type traction motor using a permanent magnet synchronous motor, that has the same weight power ratio as that of conventional ventilated type traction motors. This paper reports the test results of the proposed motor, which demonstrate that the temperature rise values are within limits and the noise level decrease 10dB from that of conventional motor.

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