| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Outline of Final Research Achievements |
A spatial measurement resolution in a space charge distribution measurement system, using a pulsed elector-acoustic (PEA) method at high temperature was attempt to be improved. To increase an efficiency of an inverter-fed motor, it is necessary to improve a thin insulating layer of a winding wire, and a procedure for estimation of insulating properties of it should be established. We tried to apply a space charge accumulation characteristics to the estimation. Furthermore, the estimation must be carried out at high temperature which is close to actual working condition. However, it was hard to apply an ordinary PEA system to the estimation at high temperature because the spatial resolution was not enough to measure the thin layer. After giving some improvements to the ordinary system, we could have an enough spatial resolution at room temperature. Even at higher temperature, higher resolution was obtained than that of the ordinary system.
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