The technical index and calibration level of the DC resistance voltage divider are analyzed, the uniform calibration method is proposed, the uncertainty is analyzed and the checking method is given.

分析了直流电阻分压箱的技术指标和校准水平，提出了等分测量的校准方法，进行了不确定度分析，给出了验证方法。

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In dc-dc converts, the average dc output voltage must be controlled to equal a desired level, though the input voltage and the output load may fluctuate.

对于直流-直流变流器，虽然输入电压和输出负载会波动，直流输出电压必须控制在一个希望的水平。

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First, the topology of the inverter and different output voltage level numbers in the situation of different voltage value ratio of two DC power supplies are analyzed.

文章中首先分析了逆变器的拓扑结构以及在直流端电压比不同的情况下的输出电平数。

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