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EFFICIENT RESONANT TOPOLOGY FOR DC-AC INVERSION WITH MINIMAL USE OF HIGH FREQUENCY SWITCHES
EFFICIENT RESONANT TOPOLOGY FOR DC-AC INVERSION WITH MINIMAL USE OF HIGH FREQUENCY SWITCHES
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机译:最少使用高频开关的DC-AC逆变的有效谐振拓扑
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摘要
System and apparatus for power conversion. In one embodiment, the apparatus comprising a DC stage, comprising a resonant circuit, for generating a high-frequency resonant current; and an AC stage for converting a high-frequency current, generated from the high-frequency resonant current, to an AC output current, wherein the AC stage comprises: a pair of serially-connected switches for (i) passing, during a first half of a cycle of an AC line, a positive portion of the high-frequency current, and (ii) passing, during a second half of the cycle of the AC line, a negative portion of the high-frequency current; and an unfurling bridge for unfurling a current waveform, formed from the positive and the negative portions, to generate the AC output current, wherein the unfurling bridge is operated at a frequency on the order of three orders of magnitude lower than an operating frequency of the serially-connected switches.
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