针对高频单相两电平逆变器运行于高调制比下存在的窄脉冲问题，分析了正弦脉宽调制(sinusoidal pulse width modulation，SPWM)策略下调制比、载波频率和死区对窄脉冲的影响，得出调制波周期内的窄脉冲分布规律。在此基础上提出一种无窄脉冲的高质量调制方法，消除了高频逆变器调制周期内的窄脉冲。同时，为了解决该方法在调制波峰谷处存在的波形畸变问题，设计一种三拍载波预测法，通过对窄脉冲区域内调制方法的修正，进一步改善了交流侧输出波形质量。最后搭建了单相全桥逆变器实验平台，对所提无窄脉冲高质量调制方法的可行性和有效性进行验证。

Narrow pulse issue existing in high-frequency single-phase two-level inverters operated under high modulation ratio, Analyzed the effects of modulation ratio, carrier frequency, and dead time on narrow pulses under the strategy of Sinusoidal Pulse Width Modulation (SPWM), and obtained the distribution law of narrow pulses within the modulation wave period. Based on this, a high-quality modulation method without narrow pulses was proposed to eliminate narrow pulses within the modulation cycle of high-frequency inverters. Additionally, in order to address the waveform distortion issue at the modulation peak and valley in this method, a three-beat carrier prediction method is designed to further improve the quality of the AC output waveform through modifications to the modulation method within the narrow pulse area. Finally, a single-phase full bridge inverter experimental platform was built to verify the feasibility and effectiveness of the proposed narrow pulse-free high-quality modulation method.