A parallel multi-input coupled inductor buck-boost converter
A buck-boost converter, coupled inductance technology, applied in the direction of conversion equipment without intermediate conversion to AC, can solve the problem that multiple input sources and load power conversion cannot be realized at the same time, and it is not suitable for low-voltage and high-current applications. Problems such as intermittent current at the output end, to achieve the effect of reducing the number, improving the dynamic performance, and increasing the control strategy
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[0024] The present invention will be further described below in conjunction with accompanying drawing.
[0025] The present invention adopts the method of cascading the step-up circuit and the step-down circuit to realize the buck-boost conversion between the input source and the load voltage, so as to meet the needs of wide range variation of the input source voltage; adopts the method of parallel connection of the step-up circuit to realize power expansion , that is, the input of each step-up circuit can be the same type of input source, or a different type of input source, so as to meet the application requirements of the distributed power generation system, and at the same time reduce the current stress of the switch tube in the single step-up circuit; Independent control of each boost circuit reduces the difficulty of implementing each boost circuit and improves the overall efficiency of the converter; by coupling the filter inductance in the boost circuit and the step-dow...
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