This article in detail discussed the hardware establishment and the software design of the engine controlled and tested system based on the AC dynamometer.

本文详细论述了基于交流测功机的发动机测控系统的硬件建立与软件设计。

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A novel topologic structure of high frequency AC pulse density modulation converter is proposed, and its operation principle, control scheme and design are described in detail.

提出了一种新颖的高频交流脉冲密度调制变频器的拓扑结构，并详细阐述了工作原理、控制方案和设计方法。

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This paper introduces the principle and characteristic of the air-core coil current transformer, designs AC-sampling and processing circuit, and introduces the process of software detail.

介绍了空心线圈电流互感器的工作原理和特点，设计了适于此种互感器的交流采样和处理电路，详细介绍了软件的处理过程。

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