The proposed converter topology is suitable for photovoltaic applications where two voltages are needed at the same time with opposite polarity. The proposed DC-DC converter topology is the combination of two high gain multilevel DC-DC converters, one is multilevel boost converter and another is multilevel cuk converter. Two output voltages with opposite polarity are achieved by using only single switch and single input supply. Positive output voltage is obtained from multilevel boost converter and negative output voltage is obtained from multilevel cuk converter.
With 1 kHz switching, Fig. While increasing the switching frequency to 10 kHz, the IL voltage unbalance becomes insignificant. A switching state producing 1Vdc, Fig. Another switching state producing 1Vdc, Fig. Switching sequence of the converter. Equivalent circuits as seen from either side. Self-powered gate drive and control.
Measured efficiency. The dc-dc converter is based on emission. A prototype using six cell modules was built and the generalized multilevel converter topology having ability tested. Experimental results demonstrated that new dc-dc to balance battery voltages, emit zero or low EMI, and have converter has high efficiency, good voltage regulation and low cost by using low-voltage MOSFETs. This technique can be used when a volume for switching power supplies used in communication fixed input-output relation is not desirable and voltage and computer industries.
A self-powered gate drive and regulation is needed. Power loss occurs when 2. To determine the power loss and voltage unbalance 18 shows the equivalent circuits of State II Fig. C4 1C 1. Switching State I: Fig. Equivalent circuit of Fig. Note that the on initial values before the switching over transition. Power Loss Calculation Every time when connecting together capacitors with 5. There are the following At the beginning of State III, the voltages are expressed five instances per switching cycle.
After the switching over, they settle down to a new voltage and become In this case, C1 has a different 6. The voltage voltages are expressed in 26 , 27 , and 28 , which are the difference between 14 and 15 is initial values before the switching over transition. After the Therefore, the energy loss is: switching over, they become C1 C3 C5 [2].
Yuan, I. Barbi, and H. Lai and F. After the [4]. Peng and J. Worth, Texas. Hochgraf, R. Lasseter, D. Divan, and T. A self-powered gate drive circuit is developed for the DC-DC converter to reduce costs, signal connections, and circuit complexity. A prototype has been built and experimental results are presented.
Article :. Date of Publication: 26 March
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