采用自检回绕思想，给出各转接电路板详细设计原理，并以离散量输入转接板设计为例给出了电路设计原理图。

Finally, the detailed principle design for each switching board was given, and the circuit schematic drawing of discrete input switching board was presented.

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为了改善电气控制系统性能，设计了适用于片状无轴承永磁电机的双向三电平PWM功率放大器和控制箱转接板。

To improve the capability of the electric system, a three-level PWM power amplifier and Backboard of the control-box is designed, which are applicable to the bearing-less slice PM motor.

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以转接模块的设计为重点，详细介绍了转接模块的结构、背板信号的分布以及控制板、转接板的开发和设计。

The structure of the switching module and the bus signal distribution of the motherboard are described in detail. Then the controlling cards and switching cards are developed.

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