Abstract
As a kind of special power supply for testing, the broadband inverter has relatively high research value for technological innovation. With the goal of broadband output, this paper proposes a novel high-frequency link inverter topology based on the beat frequency and LCC resonance. Firstly, the working principle is studied. Then, aiming at large circulation problems in the beat frequency modulation process, the method of the series-connected four-coupling reactor is adopted. Finally, experimental results show that this novel inverter can realize broadband output from 20Hz to 1010Hz with voltage THD not exceeding 3% and the relative frequency error between setting and actual is within 0.2%. The whole work proves that this novel inverter has characteristics of broadband output, high-frequency link, current mode, and soft switching.
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