بررسي سازوكارهاي انتقال حرارت در موتورهاي سنكرون مغناطيسي دائم (PMSM)

Study of Heat Transfer Mechanisms in Permanent Magnet Synchronous Motors (PMSM)

اﺳﺘﻔﺎده وﺳﯿﻊ از ﻣﻮﺗﻮرﻫﺎي اﻟﮑﺘﺮﯾﮑﯽ، ﻣﻬﻨﺪﺳﯿﻦ را ﺑﺮ آن ﻣﯽدارد ﮐﻪ در ﻃﺮاﺣﯽ، ﺑﻬﺮهﺑﺮداري و ﮐﻨﺘﺮل ﻣﻮﺗﻮرﻫﺎي اﻟﮑﺘﺮﯾﮑﯽ دﻗﺖ ﻻزم را ﻣﺒﺬول دارﻧﺪ. در اﯾﻦ ﭘﮋوﻫﺶ ﺑﻪ ﺑﺮرﺳﯽ ﺳﺎزوﮐﺎرﻫﺎي اﻧﺘﻘﺎل ﺣﺮارت در ﻣﻮﺗﻮر ﺳﻨﮑﺮون ﻣﻐﻨﺎﻃﯿﺲ داﺋﻢ ﭘﺮداﺧﺘﻪ ﻣﯽﺷﻮد. اﺑﺘﺪا ﺗﮏﺗﮏ ﺑﺨﺶﻫﺎي ﻣﻮﺗﻮر ﺳﻨﮑﺮون ﻣﻐﻨﺎﻃﯿﺲ داﺋﻢ ﻣﻌﺮﻓﯽ ﺷﺪه و ﺳﭙﺲ اﻧﺘﻘﺎل ﺣﺮارت در اﯾﻦ ﺑﺨﺶﻫﺎ ﺑﺮرﺳﯽ ﻣﯽﺷﻮد. ﻣﻬﻢﺗﺮﯾﻦ ﻗﺴﻤﺖ ﻣﻮﺗﻮر از ﻧﻈﺮ ﺣﺴﺎﺳﯿﺖ و اﻫﻤﯿﺖ اﻧﺘﻘﺎل ﺣﺮارت ﺑﻬﺘﺮ ﺑﺮاي دﻗﺖ ﺑﯿﺶﺗﺮ روي آن، ﻣﺎرﭘﯿﭻﻫﺎ ﻫﺴﺘﻨﺪ ﮐﻪ ﻗﺒﻞ از ﻗﺴﻤﺖﻫﺎي دﯾﮕﺮ ﻣﻮﺗﻮر آﺳﯿﺐ ﻣﯽﺑﯿﻨﻨﺪ. ﻫﻤﭽﻨﯿﻦ دوﻣﯿﻦ ﻗﺴﻤﺖ ﻣﻮﺗﻮر از ﻧﻈﺮ اﻫﻤﯿﺖ اﻧﺘﻘﺎل ﺣﺮارت ﺑﯿﺶﺗﺮ و ﺑﻬﺘﺮ، ﻓﺎﺻﻠﻪ ﻫﻮاﯾﯽ اﺳﺖ. ﻣﻮرد ﺑﻌﺪي ﮐﻪ ﺑﺎﯾﺪ ﻣﺪ ﻧﻈﺮ ﮔﺮﻓﺘﻪ ﺷﻮد، ﻓﺎﺻﻠﻪ ﻓﺼﻞ ﻣﺸﺘﺮك ﺑﯿﻦ ﺑﺪﻧﻪ )ﻓﺮﯾﻢ( و اﺳﺘﺎﺗﻮر اﺳﺖ ﮐﻪ در زﻣﺎن ﻃﺮاﺣﯽ ﻣﯽﺗﻮان از ﻓﺎﺻﻠﻪﻫﺎي ﺑﺴﯿﺎر ﺑﺰرگ ﺧﻮدداري ﮐﺮد. ﻫﻤﭽﻨﯿﻦ در ﻣﻄﺎﻟﻌﻪ دﻗﯿﻖﺗﺮ اﻧﺘﻘﺎل ﺣﺮارت ﻗﺎﺑﻞ ذﮐﺮ اﺳﺖ ﮐﻪ ﺑﯿﺶﺗﺮﯾﻦ اﻧﺘﻘﺎل ﺣﺮارت ﺟﺎﺑﺠﺎﯾﯽ در ﻓﺎﺻﻠﻪ ﻫﻮاﯾﯽ، اﻧﺘﻬﺎي ﻣﺎرﭘﯿﭻ و داﺧﻞ و ﺧﺎرﺟﯽ ﻣﻮﺗﻮر اﺳﺖ و ﻫﻤﭽﻨﯿﻦ ﺑﯿﺶﺗﺮﯾﻦ ﻧﺮخ اﻧﺘﻘﺎل ﺣﺮارت ﻫﺪاﯾﺘﯽ در اﺳﺘﺎﺗﻮر، روﺗﻮر و آﻫﻨﺮﺑﺎﻫﺎي ﻣﻐﻨﺎﻃﯿﺴﯽ داﺋﻢ اﺳﺖ.

Vast usage of electric motors force engineers to pay more attention in design of electric motors so these machines could be better used by major population of people. In this article heat transfer mechanism of PMSM is studied. Firstly all parts of the motor is introduced and then heat transfer study has applied on each. The most important part of the motor is winding that is highly vulnerable. The second important part is air-gap. The next important part that should be considered is gap between frame and stator that should be considered while designing. The most convective heart transfer is occurred in air-gap, end windings and inside and outside of the motor. On the other hand, the most conduction heat transfer rate is occurred in stator, rotor and magnet.