An interharmonic dual switching frequency modulation strategy for impedance network inverters,International Journal of Circuit Theory and Applications

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An interharmonic dual switching frequency modulation strategy for impedance network inverters
International Journal of Circuit Theory and Applications ( IF 1.8 ) Pub Date : 2021-01-14 , DOI: 10.1002/cta.2933
Mohammad Mohammadi ₁ , Javad S. Moghani ₁ , Paolo Mattavelli ₂ , Alireza Khoshsaadat ₃ , Mohammad Mahdi Asghari ₁ , Jafar Milimonfared ₁

Affiliation

Recently, a novel dual switching frequency modulation (DFM) has been proposed for impedance network inverters (INIs). The proposed approach allows the INIs to be designed optimally in size and efficiency, for motor drive applications. Moreover, DFM provides the possibility of operation with unity modulation index. However, DFM requires a high-frequency ratio between pulse-width modulation (PWM) and sinusoidal PWM (SPWM) switching frequencies. This paper proposes an improved modulation strategy to overcome this issue. The modulation called interharmonic dual frequency modulation (IDFM) utilizes the interharmonic areas of a conventional sinusoidal PWM to implement DFM. The proposed approach gives a low total harmonic distortion (THD) output voltage without increasing the frequency ratio of PWM and SPWM. IDFM provides the possibility of selecting a wide range of frequencies for both switching modulations. The approach is explained theoretically, compared with other switching strategies, and also the simulation and experimental results are used to validate its performance.

中文翻译：

一种阻抗网络逆变器的间谐波双开关频率调制策略

最近，已经提出了一种用于阻抗网络逆变器 (INI) 的新型双开关频率调制 (DFM)。所提出的方法允许针对电机驱动应用优化INI的尺寸和效率。此外，DFM 提供了以统一调制指数进行操作的可能性。然而，DFM 需要脉冲宽度调制 (PWM) 和正弦 PWM (SPWM) 开关频率之间的高频比。本文提出了一种改进的调制策略来克服这个问题。称为间谐波双频调制 (IDFM) 的调制利用传统正弦 PWM 的间谐波区域来实现 DFM。所提出的方法可在不增加 PWM 和 SPWM 的频率比的情况下提供低总谐波失真 (THD) 输出电压。IDFM 提供了为两种开关调制选择宽范围频率的可能性。与其他切换策略相比，对该方法进行了理论上的解释，并使用仿真和实验结果来验证其性能。

更新日期：2021-01-14

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