然后对扭矩仪的电源部分进行了设计，并通过实验数据对功放电路的输出功率和变压器的传输效率的关系作了深入的研究。

Then the power circuit is designed. at last, with analysis of experiment data the relation of power output and transmission efficiency of transformer is researched in detail.

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在控制器设计部分，分别介绍了电源电路、霍尔传感器电路、控制器电路、功放电路的设计过程。

In the controller design section, the design process of the power supply circuit, Hall sensor circuit, control circuit, power amplifier circuit is introduces. iv.

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