|本期目录/Table of Contents|

[1]齐昕,王冲,周晓敏,等. 一种低硬件资源消耗快速SVPWM 算法[J].电机与控制学报,2014,18(04):31-38.
 QI Xin,WANG Chong,ZHOU Xiao-min,et al. Low hardware resource consumption fast SVPWM algorithm[J].,2014,18(04):31-38.
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 一种低硬件资源消耗快速SVPWM 算法(PDF)
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《电机与控制学报》[ISSN:1007-449X/CN:23-1 408/TM]

卷:
18
期数:
2014年04
页码:
31-38
栏目:
出版日期:
2014-04-15

文章信息/Info

Title:
 Low hardware resource consumption fast SVPWM algorithm
作者:
 齐昕 王冲 周晓敏 丛隽 马祥华 王长松
 北京科技大学机械工程学院,北京100083
Author(s):
 QI Xin WANG Chong ZHOU Xiao-min CONG Jun MA Xiang-hua WANG Chang-song
 School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China
关键词:
 空间矢量脉宽调制 快速算法 低硬件资源消耗 逆变器 开关策略
Keywords:
 space vector pulse width modulation low hardware resource consumption fast algorithm inverterswitching strategy
分类号:
-
DOI:
-
文献标志码:
A
摘要:
 常规SVPWM 算法需要进行多次复杂的坐标变换并涉及大量的浮点乘法运算,增加了控制
器的运算负荷且占用更多的内存空间。针对这一问题提出快速SVPWM 方法,利用压缩变化将基
础电压矢量转移至特殊位置,进而可以利用电压矢量变换后的两个分量的符号和大小判断其所在
的扇区,无需进行其他数学运算; 同时发现双边对称7 段SVPWM 三相占空比计算的特殊规律,将6
个扇区分为3 组,每组的2 个扇区具有相同的运算规则,基于该发现提出简明扇区判据,只对矢量
所属的组别进行判定,由判据结果可以直接获得三相占空比,进一步简化算法,减少了运算量和程
序代码长度。通过仿真对算法的可行性进行了验证,同时在以DSP 为控制核心的永磁电机实验平
台上进行了实验。实验表明,在浮点DSP 平台上快速SVPWM 算法的运算速度提高了38%,同时
减少了程序代码所占的存储空间,节省了45 个字节的内存空间。
Abstract:
 The conventional SVPWM method requires repeated coordinate transformation and a large number
of floating point multiplications,which increases controller’s computational load and takes up much
more memory space. Hence a fast algorithm of SVPWM was put forward to solve this problem. This algorithm
converted the conventional reference space voltage vector into a special position by compression
transformation and then only made use of sign and magnitude of two components which were converted by
voltage vector to determine the sector,without other mathematical operations. At the same time,by discovering
special rules of calculation for bilaterally symmetrical seven-segment SVPWM three-phase duty,
the six sectors were divided into three groups and the two sectors of each group have the same operation
rules. Based on this discovering,a concise criterion was presented,which only needs to determine the
group of vectors and the three-phase duty ratio were obtained directly. So the algorithm was further simplified
and the length of program code and computational cost were reduced. Experimental results show
that the operation speed of the fast algorithm based on floating-point DSP platform increases by 38%. The
storage space of the program code is reduced effectively and memory space saves 45 bytes.

参考文献/References:

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备注/Memo

备注/Memo:
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更新日期/Last Update: 2014-11-25