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Ui sin - PowerPoint PPT Presentation

6.3 ?????????

i. +. ? ?. u. _. 6.3 ?????????. ???????????? ( u, i ??). 1. ???? ( instantaneous power ). ????????. ????????. p. u. i. 0. ? t. ????????. UI cos ? ?? ???. UI cos (2 ? t ?? ) ??????. ? p ???? , ????? p >0 , ??????? p <0 ? ???????. ? t. 0. ????????.

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1. ???? ( instantaneous power )

i. +. N. u. _. 9.6 ????????. 1. ???? ( instantaneous power ). p. UI cos ?. i. ? t. O. ? p ???? , ?????????? ??. u. ? ????????. 2. ???? ( ???? ) P ?. P ??? :W. cos ? ??????. ? = ? u - ? i ? ?????. 0 ?? cos j ??1.

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Ui sin - PowerPoint PPT Presentation

6.3 ?????????

1. ???? ( instantaneous power )