| 摘要 |
The invention in the simplest form is a power conditioning and inverting system (10-90) for improved and efficient power generation. In particular, the present invention is a modulated dc link scheme that dramatically reduces the switching frequency ripple across the PWM output filter inductor (L4 or L5) and provides cost, size, and weight reductions, as well as efficiency enhancements. In a preferred embodiment of the present invention, the DC-DC converter control takes a feedback signal proportional to the inverter AC output voltage (Vac1 or Vac2). This feedback is "summed" into the primary DC-DC volts command thereby causing the dc bus/link voltage to vary at a multiple of the output fundamental frequency causing the DC link to become a signal at a fundamental frequency voltage with a dc offset. The tooth modulator DC supply tracks the AC output voltage (Vac1 or Vac2), reducing the difference between the applied DC volts and the AC output volts, thereby reducing inductor core losses.
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