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交错并联磁集成Buck变换器的本安特性分析及优化设计

     

摘要

In this paper,the maximum peak inductor current in continuous conduction mode and discontinuous conduction mode of staggered parallel magnetic integrated Buck DC-DC converter is analyzed.The maximum peak inductor current worked in the CCM mode is the maximum inductor current within the work range.Ignoring the effects of the voltage ripple,the maximum output short-circuit release energy across the entire operating range is derived.Through comparing the maximum current of the inductor with the minimum ignition current and comparing the maximum output short-circuit more energy is released with the minimum ignition energy of the discharge to arrive the intrinsically safe parallel magnetic integrated Buck DC-DC converter.Based on the requirement of the output intrinsically safe and intrinsically safe within the scope of work,the appropriate range of inductance and capacitance can be obtained.By maximum output short-circuit released energy partial derivatives of inductance and to make it equal to zero,it can be concluded that the best design parameters of inductance and capacitance when maximum output short-circuit released energy to a minimum under the conditions can be given.Experimental results show the analysis is feasible.%对交错并联磁集成变换器的最大电感电流和最大输出短路释放能量进行分析计算.指出采用交错并联磁集成电路能在更好的保证本质安全的前提下实现变换器输出功率的成倍提高.得出了交错并联磁集成Buck变换器的非爆炸性本质安全判据和使得其最大输出短路释放能量最小的最佳电感、电容设计参数.实验结果证明分析方法的可行性.

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