CAJ | 학술논문

过调制能够有效地提高逆变器的输出基波电压，传统的空间矢量PWM过调制算法需要经过复杂的实时计算或查表，不易于实现。针对此问题，研究一种过调制算法，不需要经过复杂的运算和查表，易于实现，能够使逆变器从线性调制区平滑地过渡到六阶梯波工作区，并且输出电压谐波含量低。在两电平逆变器矢量控制系统上对过调制算法进行了实验。理论分析和实验结果表明该算法具有输出电压谐波含量低和实现简便的优点，适合应用于矢量控制系统中。
과조제능구유효지제고역변기적수출기파전압，전통적공간시량PWM과조제산법수요경과복잡적실시계산혹사표，불역우실현。침대차문제，연구일충과조제산법，불수요경과복잡적운산화사표，역우실현，능구사역변기종선성조제구평활지과도도륙계제파공작구，병차수출전압해파함량저。재량전평역변기시량공제계통상대과조제산법진행료실험。이론분석화실험결과표명해산법구유수출전압해파함량저화실현간편적우점，괄합응용우시량공제계통중。
The fundamental voltage of the inverter can be effectively improved with over-modulation. It needs complex real-time calculation or look-up table for traditional SVPWM over-modulation algorithm, which is not easy to implement. A over-modulation algorithm for SVPWM inverters is presented, which was simple and suitable for digital implementation. The inverter transited from the linear operation to the six-step operation smoothly. The harmonic components and the total harmonic distortion of the output volt-age were analyzed. The over-modulation algorithm experiments were carried out on the two-level inverter vector control system. Theoretical analysis and experimental results verify that the algorithm is convenient and feasible, with low THD.