摘要
该文提出一种快速计算脉冲宽度调制(PWM)电压源型逆变器供电下扁线内嵌式永磁同步电机中PWM谐波损耗的简化工程算法。该算法是作者前期提出的硅钢片与永磁体中PWM谐波损耗快速算法的简化,它基于谐波损耗正比于电压二次方的基本规律,无需采用复杂的解析模型,直接使用频域小信号时谐场分析法提取各部分谐波损耗与谐波电压二次方之间的函数关系,最终实现以定、转子坐标系下的PWM电压频谱为输入快速计算定、转子上各部分的PWM谐波损耗。除了硅钢片与永磁体中的PWM谐波损耗之外,针对扁线电机,该文还将基于频域小信号分析的PWM谐波损耗快速算法首次推广用于实现PWM谐波交流铜耗的快速计算。应用该快速算法,仅需几分钟的计算时间即可实现全工况PWM谐波损耗的快速计算。通过对比正弦电流供电下计算的效率图、考虑PWM谐波损耗计算的效率图和实测效率图,发现将所提方法计算的PWM谐波损耗考虑在内,不仅在低速轻载时可将正弦电流供电下最大4个百分点的计算效率偏差降至1个百分点左右,而且有效提升了整个工作区内效率的计算精度。
This paper proposes an engineering method for fast calculating the PWM-induced harmonic losses in interior permanent magnet synchronous machines(IPMSMs)with hairpin windings obtained from the simplification of the quick calculation method of PWM-induced harmonic losses in permanent magnets and silicon steel sheets proposed earlier.Based on the basic rule that harmonic losses are proportional to the square of harmonic voltages,the frequency-domain small-signal time-harmonic finite element analysis is used to establish the functional relationships between harmonic losses and the square of harmonic voltages.Thus,harmonic losses in the stator and rotor with the spectra of harmonic voltages in the stator and rotor reference frames can be fast calculated,respectively.In addition,the proposed algorithm based on the frequency-domain small-signal analysis is applied to calculate PWM-induced harmonic AC copper losses for the IPMSMs with hairpin windings.As a result,the PWM-induced harmonic losses over the entire working condition can be estimated in a few minutes.The efficiency maps are compared under the sinusoidal current source(SCS)supply,considering PWM-induced harmonic losses and the measured efficiency,the proposed method can reduce the maximum deviation of the computational efficiency under SCS supply from 4%to about 1%at low speed and light load working conditions and improve the calculation accuracy of efficiency in the entire working area.
作者
朱洒
曾峰
陆剑波
于吉坤
梁欣
Zhu Sa;Zeng Feng;Lu Jianbo;Yu Jikun;Liang Xin(College of Energy and Electrical Engineering Hohai University,Nanjing 211100 China;Suzhou Inovance Automotive Co.Ltd,Suzhou 215104 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2022年第22期5687-5703,共17页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(51907053)
江苏省自然科学基金(BK20190489)
中国博士后科学基金(2019M661708)资助项目。
关键词
内嵌式永磁同步电机
脉冲宽度调制
谐波损耗
效率图
工程计算
Interior permanent magnet synchronous machines
pulse-width modulation
harmonic losses
efficiency map
engineering calculation
