低开关频率下SVPWM同步调制策略对异步电机铁损的影响
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摘要
在Bertotti分离铁耗计算模型的基础上,结合标准正弦供电时电机损耗,推导PWM控制逆变器供电下异步电机损耗的计算模型,该模型主要体现了逆变器参数与电机损耗之间的关系。在大功率和低开关频率的铁路系统中,利用上述模型更深一步地分析与总结了恒磁通和恒功率下铁损随运行频率与逆变器参数的变化规律,着重研究了低开关频率下同步调制策略对电机铁耗的影响,以一台7.5kW的电机铁损计算为例,验证了该模型的有效性与可行性,为大功率牵引传动系统电机效率提升的研究提供了参考依据。
On the basis of separate Bertotti iron loss calculation model,combining the motor iron losses by sinusoidal voltage supply, a calculation model of the asynchronous motor loss calculation model fed by PWM inverter, the model mainly reflects the relationship between the motor iron losses and inverter parameters. In high power and low switching frequency of the railway system, using the above model further analysis and summary of the iron loss under constant flux and constant power changing with the operating motor's frequency and inverter parameters.This paper studies the lower switching frequency synchronization modulation strategy for the influence of the motor iron losses, with a 7.5 kW motor iron losses calculation, and verifies the effectiveness and feasibility of this model, provides a reference basis for the high power traction driving system of motor efficiency research.
On the basis of separate Bertotti iron loss calculation model,combining the motor iron losses by sinusoidal voltage supply, a calculation model of the asynchronous motor loss calculation model fed by PWM inverter, the model mainly reflects the relationship between the motor iron losses and inverter parameters. In high power and low switching frequency of the railway system, using the above model further analysis and summary of the iron loss under constant flux and constant power changing with the operating motor's frequency and inverter parameters.This paper studies the lower switching frequency synchronization modulation strategy for the influence of the motor iron losses, with a 7.5 kW motor iron losses calculation, and verifies the effectiveness and feasibility of this model, provides a reference basis for the high power traction driving system of motor efficiency research.
引文
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[2]房建俊,徐余法,罗玉东,等.笼型异步电机降耗与分析方法综述[J].电机与控制应用,2016,43(7):57-62.
[3]王建渊,安少亮,李洁,等.考虑主磁路饱和与铁损的异步电机模型[J].电工技术学报,2010,25(10):44-50.
[4]黄平林,胡虔生,崔杨,等.PWM逆变器供电下电机铁心损耗的解析计算[J].中国电机工程学报,2007,27(12):19-23.
[5]Mueller M,Williamson S,Flack T,et al.Calculation of iron losses from time-stepped finite-element models of cage induction machines[J].1995:88.
[6]Ma L,Sanada M,Morimoto S,et al.Prediction of iron loss in rotating machines with rotational loss included[J].IEEE Transactions on Magnetics,2003,39(4):2036-2041.
[7]Khomfoi S,Kinnares V,Viriya P.Investigation into core losses due to harmonic voltages in PWM fed induction motors[C]//IEEE 1999International Conference on Power Electronics and Drive Systems.IEEE,1999:104-109 vol.1.
[8]方瑞明,王榕.基于谐波分析法的高速变频电机铁耗计算方法[J].电机与控制学报,2004,8(1):25-27.
[9]Boglietti A,Cavagnino A,Lazzari M,et al.Predicting iron losses in soft magnetic materials with arbitrary voltage supply:an engineering approach[J].Magnetics IEEE Transactions on,2003,39(2):981-989.
[10]Ionel D M,Popescu M,Dellinger S J,et al.On the variation with flux and frequency of the core loss coefficients in electrical machines[J].IEEE Transactions on Industry Applications,2006,42(3):658-667.
[11]Bertotti G.General properties of power losses in soft ferromagnetic materials[J].Magnetics IEEE Transactions on,1988,24(1):621-630.
[12]崔杨,胡虔生,黄允凯.任意频率正弦波条件下铁磁材料损耗计算[J].微电机,2007,40(8):1-3.
[13]Domeki H,Ishihara Y,Kaido C,et al.Investigation of benchmark model for estimating iron loss in rotating machine[J].Magnetics IEEE Transactions on,2004,40(2):794-797.
[14]罗富强,夏长亮,乔照威,等.PWM激励下异步电机铁耗等值电阻模型[J].电工技术学报,2012,27(7):101-108.
[15]韩静静.PWM逆变器供电对异步电动机铁芯损耗影响的研究[D].北京交通大学,2011.
[16]王堃,游小杰,王琛琛,等.低开关频率下SVPWM同步调制策略比较研究[J].中国电机工程学报,2015,35(16):4175-4183.
[17]胡雪婷.笼型异步电机的电磁损耗建模和降耗措施的研究[D].湖南大学,2013.