摘要
利用混沌序列对三角波进行混沌扩频,进而实现混沌脉宽调制(pulse width modulation,PWM),可以达到降低正弦脉宽调制波(sinusoidal pulse width modulation,SPWM)谐波峰值、减少机械谐振等目的。针对传统SPWM波混沌调制在实现时混沌序列很快进入周期以及运算量大的问题,该文提出一种由传统Logistic混沌映射和Tent混沌映射相结合的改进的互变参数双混沌序列映射,并给出对应的SPWM波生成方法。与传统混沌序列生成方法相比,该方法具有较低的运算资源消耗,较快的运算速度和较好的混沌性,且混沌序列周期明显增加。接着给出基于现场可编辑逻辑门阵列(field-programmable gate array,FPGA)的硬件实现方法,并将该方法生成的SPWM波与其他调制方法生成的SPWM波进行对比分析。结果表明,该算法实现简单,占用资源少,并可明显降低谐波峰值。
Chaotic sequence is used for triangle wave spectrum chaotic spreading. Chaos triangle wave can be used for pulse width modulation（PWM） modulation, and then the reduction of harmonic content peak in sinusoidal pulse width modulation（SPWM） wave and the mechanical resonance, etc. can be realized. Due to periodic question and large computational complexity question of the traditional chaotic sequence mapping, this paper proposed a new double-chaotic sequence with mutual changing parameters mapping, and the corresponding method to generate SPWM wave was presented. This method was improved from traditional chaotic mapping equation Logistic chaotic mapping and combining Tent chaotic mapping. Compared with the traditional method for generating chaotic sequence, this method has a faster speed, better chaotic characteristics, costs fewer sources and can prolong the period efficiently. The chaotic mapping and SPWM modulation method based on field-programmable gate array（FPGA） is given and compared with other modulation method. The results show that the modulation method proposed in this paper can be finished easily and can reduce the harmonics peak effectively.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2014年第30期5335-5342,共8页
Proceedings of the CSEE
关键词
混沌正弦脉宽调制波
混沌序列
周期性
双混沌映射
基于现场可编辑逻辑门阵列
chaotic sinusoidal pulse width modulation（SPWM）
chaotic sequence
period
double-chaotic mapping
field-programmable gate array（FPGA）
