现代电子技术
現代電子技術
현대전자기술
Modern Electronics Technique
2015年
20期
132-136,139
,共6页
直流电压利用率%电压型逆变器%过调制法%空间矢量脉宽调制%总谐波畸变率
直流電壓利用率%電壓型逆變器%過調製法%空間矢量脈寬調製%總諧波畸變率
직류전압이용솔%전압형역변기%과조제법%공간시량맥관조제%총해파기변솔
DC voltage utilization ratio%voltage source inverter%overmodulation method%SVPWM%THD
为提高三相两电平电压型逆变器的直流电压利用率，通过对空间矢量脉宽调制（SVPWM）原理进行详细分析，提出一种改进的过调制法。该方法通过改变参考电压矢量的轨迹及相应的合成策略，定义了一种新的比传统过调制法所得结果具有更大基波幅值的参考电压波形。仿真结果证明该方法在直流电压利用率及输出电压的总谐波畸变率（THD）两方面都较传统过调制法有优势。
為提高三相兩電平電壓型逆變器的直流電壓利用率，通過對空間矢量脈寬調製（SVPWM）原理進行詳細分析，提齣一種改進的過調製法。該方法通過改變參攷電壓矢量的軌跡及相應的閤成策略，定義瞭一種新的比傳統過調製法所得結果具有更大基波幅值的參攷電壓波形。倣真結果證明該方法在直流電壓利用率及輸齣電壓的總諧波畸變率（THD）兩方麵都較傳統過調製法有優勢。
위제고삼상량전평전압형역변기적직류전압이용솔，통과대공간시량맥관조제（SVPWM）원리진행상세분석，제출일충개진적과조제법。해방법통과개변삼고전압시량적궤적급상응적합성책략，정의료일충신적비전통과조제법소득결과구유경대기파폭치적삼고전압파형。방진결과증명해방법재직류전압이용솔급수출전압적총해파기변솔（THD）량방면도교전통과조제법유우세。
To improve DC voltage utilization ratio of three?phase two?level voltage source inverter,an improved overmodula?tion method is proposed by analyzing the principle of SVPWM in detail. By changing the track of reference voltage vector and the corresponding synthetic strategies,a new reference voltage waveform which has better fundamental voltage amplitude than the traditional overmodulation method is defined. The simulation results show that the improved method has more superiority than the traditional over?modulation method in the aspects of DC voltage utilization ratio and THD of output voltage.
