High-frequency pseudo direct-current bus inverter based on series resonant converter and modulation control strategy of high-frequency pseudo direct-current bus inverter

The invention relates to the technical field of inverter modulation control, and discloses a high-frequency pseudo direct-current bus inverter based on a series resonant converter and a modulation control strategy thereof, comprising a topological structure consisting of an input voltage V1, an output voltage V2, primary side high-frequency switch tubes S1 to S4, secondary side rectifier diodes D1 to D4 and full-bridge inverter circuits S5 to S8, a resonance unit, an isolation transformer T and an output filter capacitor Cf are also arranged in the topological structure; the resonance unit is composed of a resonance capacitor Cr, a resonance inductor Lr and an excitation inductor Lm of a transformer. According to the invention, when the inverter works near zero current, the theoretical pulse density is reduced, and even two pulses can bring too high power and generate a peak on an output waveform. In order to mitigate such spikes, a stop angle ([theta] s) is introduced, which should be less than, but very clo