高速永磁電機鐵耗的計算與分析
發(fā)布時間：2019-05-11 18:32
【摘要】：高速永磁電機具有結(jié)構(gòu)簡單、效率高、可靠性高等優(yōu)點，在許多場合可以取消機械調(diào)速裝置，提高系統(tǒng)效率和功率密度，，在分布式發(fā)電獨立電站、機械儲能裝置、高速驅(qū)動等領(lǐng)域得到廣泛應用，具有良好的應用前景。由于高速永磁電機的工作頻率遠高于傳統(tǒng)電機，其產(chǎn)生的定子鐵芯損耗也遠高于傳統(tǒng)電機，所以高速永磁電機溫升也不同于傳統(tǒng)電機，準確計算高速永磁電機的損耗，合理設(shè)計通風散熱對于高速電機的設(shè)計尤為重要。本文分析了幾種高速電機的鐵耗計算方法，通過對一臺樣機鐵耗計算的對比分析，比較了各個方法的適用性。 首先，總結(jié)和詳細介紹了電機鐵耗的多種計算模型。從電機種類上來說，既有傳統(tǒng)電機的鐵耗的計算模型，也有高速電機的鐵耗計算模型。從電源波形上來說，既有正弦波下鐵耗的計算模型，也有任意波形下鐵耗的計算模型。從磁化條件上來說，既有單獨考慮交變磁化時的鐵耗計算模型，也有同時考慮交變、旋轉(zhuǎn)磁化條件時的鐵耗計算模型。 其次，詳細介紹了電磁場有限元計算的原理，有限元分析通過將對偏微分方程的求解轉(zhuǎn)換為對代數(shù)方程的求解，從而簡化了計算過程，給出了有限元法分析電磁場的計算過程，并總結(jié)了有限元分析法的步驟。 最后，對一臺高速永磁發(fā)電機建立了有限元模型，仿真分析了電機內(nèi)部磁場和電機的性能。用傳統(tǒng)理論定子鐵耗計算模型和Bertitto分離鐵耗計算模型對一臺高速永磁發(fā)電機的鐵芯損耗進行了計算，并與實際測量和有限元計算值進行了對比。根據(jù)計算誤差分析了這兩種計算模型的適用性。
[Abstract]:High speed permanent magnet motor has many advantages, such as simple structure, high efficiency, high reliability and so on. In many cases, mechanical speed regulating device can be eliminated, system efficiency and power density can be improved, in distributed power generation independent power station, mechanical energy storage device. High speed drive and other fields have been widely used and have a good application prospect. Because the working frequency of high speed permanent magnet motor is much higher than that of traditional motor, and the loss of stator core produced by high speed permanent magnet motor is much higher than that of traditional motor, the temperature rise of high speed permanent magnet motor is also different from that of traditional motor, and the loss of high speed permanent magnet motor is calculated accurately. Reasonable design of ventilation and heat dissipation is particularly important for the design of high-speed motor. In this paper, several calculation methods of iron consumption of high-speed motor are analyzed, and the applicability of each method is compared by comparing and analyzing the calculation of iron consumption of a prototype machine. First of all, a variety of calculation models of motor iron consumption are summarized and introduced in detail. As far as the type of motor is concerned, there are not only the calculation model of the iron consumption of the traditional motor, but also the calculation model of the iron consumption of the high-speed motor. As far as the waveform of power supply is concerned, there is not only the calculation model of iron consumption under sine wave, but also the calculation model of iron consumption under arbitrary waveform. In terms of magnetization, there are not only the calculation model of iron consumption considering alternating magnetization alone, but also the calculation model of iron consumption when alternating magnetization and rotating magnetization are considered at the same time. Secondly, the principle of finite element calculation of electromagnetic field is introduced in detail. The finite element analysis simplifies the calculation process by transforming the solution of partial differential equation into the solution of algebra equation, and gives the calculation process of finite element analysis of electromagnetic field. The steps of finite element analysis are summarized. Finally, the finite element model of a high-speed permanent magnet generator is established, and the internal magnetic field and the performance of the motor are simulated and analyzed. The core loss of a high speed permanent magnet generator is calculated by using the traditional theoretical stator iron loss calculation model and Bertitto separation iron consumption calculation model, and compared with the actual measurement and finite element calculation values. The applicability of the two models is analyzed according to the calculation error.
【學位授予單位】：中國艦船研究院
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM351
本文編號：2474748
[Abstract]:High speed permanent magnet motor has many advantages, such as simple structure, high efficiency, high reliability and so on. In many cases, mechanical speed regulating device can be eliminated, system efficiency and power density can be improved, in distributed power generation independent power station, mechanical energy storage device. High speed drive and other fields have been widely used and have a good application prospect. Because the working frequency of high speed permanent magnet motor is much higher than that of traditional motor, and the loss of stator core produced by high speed permanent magnet motor is much higher than that of traditional motor, the temperature rise of high speed permanent magnet motor is also different from that of traditional motor, and the loss of high speed permanent magnet motor is calculated accurately. Reasonable design of ventilation and heat dissipation is particularly important for the design of high-speed motor. In this paper, several calculation methods of iron consumption of high-speed motor are analyzed, and the applicability of each method is compared by comparing and analyzing the calculation of iron consumption of a prototype machine. First of all, a variety of calculation models of motor iron consumption are summarized and introduced in detail. As far as the type of motor is concerned, there are not only the calculation model of the iron consumption of the traditional motor, but also the calculation model of the iron consumption of the high-speed motor. As far as the waveform of power supply is concerned, there is not only the calculation model of iron consumption under sine wave, but also the calculation model of iron consumption under arbitrary waveform. In terms of magnetization, there are not only the calculation model of iron consumption considering alternating magnetization alone, but also the calculation model of iron consumption when alternating magnetization and rotating magnetization are considered at the same time. Secondly, the principle of finite element calculation of electromagnetic field is introduced in detail. The finite element analysis simplifies the calculation process by transforming the solution of partial differential equation into the solution of algebra equation, and gives the calculation process of finite element analysis of electromagnetic field. The steps of finite element analysis are summarized. Finally, the finite element model of a high-speed permanent magnet generator is established, and the internal magnetic field and the performance of the motor are simulated and analyzed. The core loss of a high speed permanent magnet generator is calculated by using the traditional theoretical stator iron loss calculation model and Bertitto separation iron consumption calculation model, and compared with the actual measurement and finite element calculation values. The applicability of the two models is analyzed according to the calculation error.
【學位授予單位】：中國艦船研究院
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM351
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