在功率变换器的实际生产应用的时候费用优化是不得不考虑的一个关键因素。提出了一种费用最优函数来对功率变换器的可靠性进行分配，此费用函数可以使得在功率变换器可靠性到达目标要求的前提下实现费用的最优化，而且针对功率变换器将可靠性分配转化为对失效率进行分配。最后采用Buck变换器进行实施分析，结果表明此方法有效可行。%When the power converter is applied to the actual production , cost optimization is a key factor that we have to consider.Therefore, we propose a cost optimal function to allocate the reliability of the power converter .The cost function can be achieved cost optimization under the premise of the reliability of the power converter to reach the ob -jectives and requirements .And reliability allocation is translated to failure rate allocated for the power converter .Fi-nally , the Buck converter is employed to implement the analysis , and the results show that the method is effective and feasible .
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