CAJ | 학술논문

提出一种组合型中点不对称规则采样法，只需在三角载波的波峰(或波谷)进行采样，利用数学中线性组合的原理构造出波谷(或波峰)的“采样点”，再根据二分法的原理求得SPWM波开关点的时刻值。详细阐述了该方法的基本理论，并得出产生SPWM波开关点的运算方程。理论分析与仿真研究表明，与传统的规则采样法相比，该方法的SPWM算法更简单，采样点更少，开关点时刻值的误差和负载电流THD更小，且输出的基波幅值更大。所以，该方法对传统的规则采样法进行了优化，更加逼近了自然采样法的调制效果，易于在DSP上实现，并且运算速度快，具有良好的工程应用价值。
제출일충조합형중점불대칭규칙채양법，지수재삼각재파적파봉(혹파곡)진행채양，이용수학중선성조합적원리구조출파곡(혹파봉)적“채양점”，재근거이분법적원리구득SPWM파개관점적시각치。상세천술료해방법적기본이론，병득출산생SPWM파개관점적운산방정。이론분석여방진연구표명，여전통적규칙채양법상비，해방법적SPWM산법경간단，채양점경소，개관점시각치적오차화부재전류THD경소，차수출적기파폭치경대。소이，해방법대전통적규칙채양법진행료우화，경가핍근료자연채양법적조제효과，역우재DSP상실현，병차운산속도쾌，구유량호적공정응용개치。
A combined-midpoint-asymmetric-regular-sampling approach was proposed . It only needs to sample at crests ( or troughs) of the triangular-carrier wave, and then the principle of mathematical line-ar-combination was used to construct the sampling points of troughs ( or crests) , and then, according to the principle of dichotomy to get the time values of the switch point. The basic theory of the proposed method was described and the operational equation of SPWM switch time was given . Theory analysis and simulation study show that, the proposed SPWM algorithm is more simple, the sampling point is less, er-rors of the switch point’ s time values and the THD of load current are smaller, and the fundamental am-plitude output is bigger than that of the traditional regular-sampling. Therefore, the traditional regular-sampling algorithms were optimized by the proposed algorithm, which is easy to achieve in the DSP, with high speed, and have a good engineering application value.