PARTIAL RESONANCE SINGLE-PHASE PWM FULL-BRIDGE INVERTER

摘要

PROBLEM TO BE SOLVED: To provide a partial resonance single-phase PWM full-bridge inverter, whose number of parts has been curtailed sharply by reducing the numbers of auxiliary switches, drive circuits, and so on. ;SOLUTION: This single-phase PWM full-bridge inverter is provided with first and second main switching elements Q₁, Q₂ connected in series, third and fourth main switching elements Q₃, Q₄ connected in series, current returning diodes G₁-G₄ and capacitors for resonance C₁-C₄ connected in parallel with the main switching elements Q₁-Q₄. Here, a first auxiliary switch Qa, a reactor for resonance L₃, and a second auxiliary switch Qb are connected in series, between an intermediate junction H₁ of the first and second main switching elements Q₁, Q₂, and an intermediate junction H₂ of the third and fourth main switching elements Q₃, Q₄.;COPYRIGHT: (C)1999,JPO