Excessive temperature rise during the operation of the generator system can affect the safety and life cycle of the machine.Therefore,in order to accurately obtain the internal temperature of the switched reluctance g...Excessive temperature rise during the operation of the generator system can affect the safety and life cycle of the machine.Therefore,in order to accurately obtain the internal temperature of the switched reluctance generator(SRG),an internal temperature estimation model based on electric heating is established in this paper.First,an im-proved variable coefficient Bertotti loss separation calcula-tion formula is adopted to solve the iron loss of the genera-tor under various operating conditions.Subsequently,the accurate heat source parameters in the temperature model can be obtained,and the corresponding heat source data can be calculated.Then,based on the obtained heat source data,an equivalent thermal circuit model is established for SRG.Meanwhile,in order to effectively reduce the internal temperature during SRG operation,a new water-cooled structure for direct cooling of SRG stator windings is pro-posed in this paper,which can effectively reduce the tem-perature rise during operation,thus improving the reliabil-ity of the generator.Finally,by comparing the equivalent thermal circuit model,finite element thermal model,and experimental temperature measurements of SRG,it is found that results from the equivalent thermal circuit model of the SRG are closer to the measured temperatures,while the effectiveness of the water-cooled structure is verified.展开更多
基金supported in part by the Shenzhen Col-laborative Innovation Special Plan International Coopera-tion Research Project(No.GJHZ20220913144400001)the General Research Project of Shenzhen Science and Technology Plan(No.JCYJ20220818100000001).
文摘Excessive temperature rise during the operation of the generator system can affect the safety and life cycle of the machine.Therefore,in order to accurately obtain the internal temperature of the switched reluctance generator(SRG),an internal temperature estimation model based on electric heating is established in this paper.First,an im-proved variable coefficient Bertotti loss separation calcula-tion formula is adopted to solve the iron loss of the genera-tor under various operating conditions.Subsequently,the accurate heat source parameters in the temperature model can be obtained,and the corresponding heat source data can be calculated.Then,based on the obtained heat source data,an equivalent thermal circuit model is established for SRG.Meanwhile,in order to effectively reduce the internal temperature during SRG operation,a new water-cooled structure for direct cooling of SRG stator windings is pro-posed in this paper,which can effectively reduce the tem-perature rise during operation,thus improving the reliabil-ity of the generator.Finally,by comparing the equivalent thermal circuit model,finite element thermal model,and experimental temperature measurements of SRG,it is found that results from the equivalent thermal circuit model of the SRG are closer to the measured temperatures,while the effectiveness of the water-cooled structure is verified.
