Thermal analysis of Induction motor
???????????????? ??? ?????????????? ???????????? electrical machine (????????? ?????????????? induction motor) ??? ??? ????????? ??????????? ?????????? ??? ????????????? ???????????????????????? ???? ????? ?????? ???? ?????????????????? ??????? ????????????? ?? ?????????????????????? ????? ???? ?????????????????? ????????? ?????? ????????????????? ????????????????????? ???????? ??? ???????????? ???????? ?????? ?????????????? ???????????????????????
Thermal calculation ????????????????????? ??????? ????????????? ??????????? ????????????
Thermal calculation ????????????????????? ??????? ????????????? ??????????? ????????????
- losses distribution in motor
- thermal conductivity
- thermal capacity
- other conditions for thermal conductivity for cooling surface.
Thermal calculation ?????????????? steady state ??? dynamic state calculations ??????? ?????? ???????????? ????????????? ???????? ? ???????? ?????????????????????? ???? ?? ??????????????? ????????????????????? ????????????????????????????
Steady state thermal calculation
???????? ?????????????????? steady state ?????????????? analytical methods? field theory ??? thermal equivalent circuit ??????? ???? ? ???????? ?????????????????? ????????????? thermal equivalent circuit ??????????? ?? ????????????????? ??????????
Thermal equivalent circuit method (TEC)
???????? ??????????????? electrical current ???????????? ?????????? ??????? ?????????????????????? ????? ???????????????? Fourier ??? law of thermal conductivity P=(??)? ??? Ohm?s law of electric current I=VG (G=1/R), ???? ??????????? ??? ??????????????????? ????????? ?????????????? ?? ??? Voltage ??????????? V ???? ????????? P ??? I ???? heat conductivity ? ??? current conductivity G ??????? ????????????????? ????????? heat conductivity ? ??? constant ???? ?????????? ???????????? ????????? ???????? ?????? linear circuit ???????? algebraic methods ??????????? ????????? ?????????????????? ????????????
Steady state thermal calculation
???????? ?????????????????? steady state ?????????????? analytical methods? field theory ??? thermal equivalent circuit ??????? ???? ? ???????? ?????????????????? ????????????? thermal equivalent circuit ??????????? ?? ????????????????? ??????????
Thermal equivalent circuit method (TEC)
???????? ??????????????? electrical current ???????????? ?????????? ??????? ?????????????????????? ????? ???????????????? Fourier ??? law of thermal conductivity P=(??)? ??? Ohm?s law of electric current I=VG (G=1/R), ???? ??????????? ??? ??????????????????? ????????? ?????????????? ?? ??? Voltage ??????????? V ???? ????????? P ??? I ???? heat conductivity ? ??? current conductivity G ??????? ????????????????? ????????? heat conductivity ? ??? constant ???? ?????????? ???????????? ????????? ???????? ?????? linear circuit ???????? algebraic methods ??????????? ????????? ?????????????????? ????????????
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