Accounting temperature fluctuations in stator winding of induction motor when checking for heating in intermittent mode
The relevance of the work is caused by the need to reduce the accident rate of induction motors, increase the service life and efficiency of their use by improving the accuracy of the estimation of the thermal state at the design stage and during the exploitation. The main aim of the study is to det...
| Main Authors: | , |
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| Format: | Article |
| Language: | Russian |
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Tomsk Polytechnic University
2019-05-01
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| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
| Subjects: | |
| Online Access: | http://izvestiya.tpu.ru/archive/article/view/1567 |
| _version_ | 1797813338736951296 |
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| author | Anatoliy Zyuzev Vladimir Metelkov |
| author_facet | Anatoliy Zyuzev Vladimir Metelkov |
| author_sort | Anatoliy Zyuzev |
| collection | DOAJ |
| description | The relevance of the work is caused by the need to reduce the accident rate of induction motors, increase the service life and efficiency of their use by improving the accuracy of the estimation of the thermal state at the design stage and during the exploitation. The main aim of the study is to determine the limits of applicability of the average loss method for estimating the thermal state of induction motors in intermittent mode and refinement of this method, taking into account the nonlinear coupling between rate of aging of insulation and temperature, as well as the ratio of the cycle parameters and the thermal time constant of the motor. The methods used in the study: analytical methods and computer experiment based on five masses thermodynamic model of the TEFC induction motor. The results. It was found that there are such combinations of parameters of cycle in intermittent mode for which evaluation of the thermal state of the induction motor by the average loss method is incorrect. Thus, at a low duty ratio the average insulationaging rate per cycle may exceed its value obtained by calculation based on the average temperature for the cycle. The authors have evaluated the need to consider the effect of winding temperature fluctuations when checking engine for heating according to the size of the engine and proposed a refined method of estimating the thermal state of the induction motor by the average loss method by introducing a correction coefficient that takes into account the nonlinear coupling of the rate of aging of insulation from the stator winding temperature. The formulas for calculating this coefficient were obtained. It is shown that within the formal borders of intermittent mode (10 min), the divergence between the results obtained analytically and via five masses thermodynamic model of the induction motor used in the computational experiment is very small and does not exceed 6...8 %. |
| first_indexed | 2024-03-13T07:50:29Z |
| format | Article |
| id | doaj.art-d698405c3cb94acca978d9be823161f3 |
| institution | Directory Open Access Journal |
| issn | 2500-1019 2413-1830 |
| language | Russian |
| last_indexed | 2024-03-13T07:50:29Z |
| publishDate | 2019-05-01 |
| publisher | Tomsk Polytechnic University |
| record_format | Article |
| series | Известия Томского политехнического университета: Инжиниринг георесурсов |
| spelling | doaj.art-d698405c3cb94acca978d9be823161f32023-06-02T21:06:34ZrusTomsk Polytechnic UniversityИзвестия Томского политехнического университета: Инжиниринг георесурсов2500-10192413-18302019-05-013264Accounting temperature fluctuations in stator winding of induction motor when checking for heating in intermittent modeAnatoliy ZyuzevVladimir MetelkovThe relevance of the work is caused by the need to reduce the accident rate of induction motors, increase the service life and efficiency of their use by improving the accuracy of the estimation of the thermal state at the design stage and during the exploitation. The main aim of the study is to determine the limits of applicability of the average loss method for estimating the thermal state of induction motors in intermittent mode and refinement of this method, taking into account the nonlinear coupling between rate of aging of insulation and temperature, as well as the ratio of the cycle parameters and the thermal time constant of the motor. The methods used in the study: analytical methods and computer experiment based on five masses thermodynamic model of the TEFC induction motor. The results. It was found that there are such combinations of parameters of cycle in intermittent mode for which evaluation of the thermal state of the induction motor by the average loss method is incorrect. Thus, at a low duty ratio the average insulationaging rate per cycle may exceed its value obtained by calculation based on the average temperature for the cycle. The authors have evaluated the need to consider the effect of winding temperature fluctuations when checking engine for heating according to the size of the engine and proposed a refined method of estimating the thermal state of the induction motor by the average loss method by introducing a correction coefficient that takes into account the nonlinear coupling of the rate of aging of insulation from the stator winding temperature. The formulas for calculating this coefficient were obtained. It is shown that within the formal borders of intermittent mode (10 min), the divergence between the results obtained analytically and via five masses thermodynamic model of the induction motor used in the computational experiment is very small and does not exceed 6...8 %.http://izvestiya.tpu.ru/archive/article/view/1567induction motoraverage loss methodthermal deterioration of insulationstator windingintermittent mode |
| spellingShingle | Anatoliy Zyuzev Vladimir Metelkov Accounting temperature fluctuations in stator winding of induction motor when checking for heating in intermittent mode Известия Томского политехнического университета: Инжиниринг георесурсов induction motor average loss method thermal deterioration of insulation stator winding intermittent mode |
| title | Accounting temperature fluctuations in stator winding of induction motor when checking for heating in intermittent mode |
| title_full | Accounting temperature fluctuations in stator winding of induction motor when checking for heating in intermittent mode |
| title_fullStr | Accounting temperature fluctuations in stator winding of induction motor when checking for heating in intermittent mode |
| title_full_unstemmed | Accounting temperature fluctuations in stator winding of induction motor when checking for heating in intermittent mode |
| title_short | Accounting temperature fluctuations in stator winding of induction motor when checking for heating in intermittent mode |
| title_sort | accounting temperature fluctuations in stator winding of induction motor when checking for heating in intermittent mode |
| topic | induction motor average loss method thermal deterioration of insulation stator winding intermittent mode |
| url | http://izvestiya.tpu.ru/archive/article/view/1567 |
| work_keys_str_mv | AT anatoliyzyuzev accountingtemperaturefluctuationsinstatorwindingofinductionmotorwhencheckingforheatinginintermittentmode AT vladimirmetelkov accountingtemperaturefluctuationsinstatorwindingofinductionmotorwhencheckingforheatinginintermittentmode |