| Research Abstract |
We were able to announce research results in 3 papers to international electrical conference, 1 paper to the Transaction of the Institute of Electrical Engineers of Japan, 33 oral reports to conferences such as the Rotating machine Technical Meeting of the Institute of Electrical Engineers of Japan, and 4 publications. In addition, at present, research results are being prepared for contribution to the Transactions of the Institute of Electrical Engineers of Japan and the Journal of the Institute of Electrical Installation Engineers of Japan. A summary of the research results follows :
【○!1】 Influence of power supply waveform on the characteristics and loss of induction motors (IM) :
Losses in small IM were evaluated in detail, with the relationship between design dimensions and loss. Moreover, stray load losses were estimated by four methods, and characteristics of the different estimations of stray load loss and so on were examined. Furthermore, the characteristics of three-phase IM ca
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n now be accurately and easily calculated based on a calculation method proposed by us from the actual measured value of stray load loss.
【○!2】 Examination of the characteristics of IM under unbalanced voltage :
A method for simulating the steady state characteristics of IM under unbalanced voltage was proposed and inspected using a test machine. The proposed technique was shown to be very useful. In addition, the current increasing phenomena in the current of IM under unbalanced voltage was examined in detail.
【○!3】 Influence of higher harmonic voltage included in distorted power supply waves on the electromagnet vibration of IM under load conditions :
Electromagnetic vibration caused by time-harmonic voltage of the capacitor induction motor was examined in detail. As a result, characteristics and reduction effects of skewed slots, etc. of the vibration were revealed. Conditions governing the occurrence of electromagnetic vibration in IM driven by distorted voltages were examined in detail with the relationship between electromagnetic vibration caused by time-harmonic voltage and load conditions. Less
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