Sine pulse width modulation matrix converter based on digital signal processor 基于數字信號處理器的正弦脈寬調制矩陣變換器
With single polar spwm ( sine pulse width modulation ) , the whole solution of hardware and software is presented based on the resource of the dsp controller chip 經對比系統采用了單極性調制的spwm方式,并根據核心處理芯片的各類資源給出了一套具體的軟硬件數字化實現方案。
The software implements sine pulse width modulation ( spwm ) , hybrid space vector pulse width modulation ( hsvpwm ) using assembly language of tms320f240 and achieves the purpose of variable - frequency adjusting - speed for induction motor 在軟件方面,用tms320f240匯編語言編制程序實現正弦脈寬調制、電壓空間矢量脈寬調制從而達到對異步電機變頻調速的目的。
The paper discusses a method that produces the spwm ( sine pulse width modulation ) waveform in detail , which is the changed equal - area arithmetic and compares with the equal - area arithmetic , and analyzes the harmonic that produced by the arithmetic , discusses the problem of dead - time and gives the resolvent 文中詳細討論了生成spwm波的一種改進的等面積算法的原理,進行了諧波分析,并和等面積算法進行了比較,討論了死區問題和解決方法。
There are five parts are as follows : in part one , the concept of switching function is introduced first to establish the nonlinear mathematical model of the induction motor variable frequency speed adjustment system which is fed by a sine pulse width modulated ( spwm ) inverter and takes the effect of the main magnetic circuit saturation into consideration , then the low frequency oscillation of the system is simulated according to the model . next , from the view point of energy conversion of the inverter - induction system , a criterion for the low frequency oscillation is proposed to determine whether the system is in low frequency oscillation which is judged by whether the interval of the negative current component of the inverter input current is more than 1 / fc ( fc is the carrier wave frequency of the inverter ) or not 首先引入開關函數概念,建立了正弦脈寬調制( spwm )逆變器供電異步電動機,考慮主磁路飽和時的變頻調速系統整體數學模型,模擬系統的低頻振蕩;其次從逆變器-異步電動機系統能量轉換角度出發,提出通過檢測逆變器輸入電流中負電流的間隔時間是否大于1 / f _ c ( f _ c為逆變器載波頻率)來判定系統是否出現低頻振蕩;最后的實驗結果驗證了系統低頻振蕩建模和判據的實用性和正確性。
The system has significant advantages in environments requiring high integration , low weight , and low electromagnetic interferences operated with batteries . the active vibration control aimed at a cantilever beam with piezoelectric sensors and actuators was studied , and the principle and the method of the sine pulse width modulation technology were analyzed 論文以表面粘貼有壓電傳感器和驅動器的懸臂梁為研究對象,運用正弦脈寬調制技術以及基于tms320f2812dsp硬件平臺構建了實驗系統,對其進行了研究。
Using dsp of ti inc . - - - - - - - tms320f240 this thesis develops a general ac variable - speed system , and then carries out the research on various new control strategies for induction motor based on it . this paper explains sine pulse width modulation ( spwm ) , space - vector pulse width modulation ( svpwm ) , and new pulse width modulation method - hybrid space vector pulse width modulation ( hsvpwm ) aiming at a inherent problem of dead time in the common pulse width modulation 本文闡述了正弦脈寬調制( spwm )控制技術;電壓空間矢量( svpwm )控制技術;以及針對常用脈寬調制方法中存在的一個固有問題? ?逆變器開關器件死區時間的影響,提出了一種新的脈寬調制方法:混合空間矢量脈寬調制控制技術。
This paper expatiated that the mathematics models of ac motor is higher order , non - linear and closed coupling , multivariable input - output system . and introduces the principle and the algorithm of sine pulse width modulation ( spwm ) , opened - loop space voltage pulse width modulation control ( svpwm ) and field oriented control ( foc ) . finally , realized the control strategies of variable - frequency speed regulating using assembly and c language 文中闡述了交流異步電機的數學模型是高階、非線性、強耦合的多變量輸入輸出系統,介紹了交流電機的正弦脈寬調制、開環電壓空間矢量的u / f控制和磁場定向控制的原理及控制算法,并利用dsp構成控制系統,通過匯編語言和16位定點c語言混合編程的方法實現了上述的變頻調速控制策略。