Type KZ4A AC drive electric locomotive is designed for national high-speed railway in Kazakhstan.

KZ4A型交流传动电力机车用于哈萨克斯坦国家铁路干线高速客运。

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The results show that the electric vehicle with AC drive system which adopts the vector control has the excellent performance of speed regulation.

结果表明，采用矢量控制的交流驱动电动汽车具有良好的调速性能。

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Then the drive system of the fin stabilizer is analyzed. To give a control policy which AC motor is controlled by applying electric current loop, speed loop, position loop in this system.

然后对转鳍驱动系统进行了分析，确定了在系统中使用电流环、速度环、位置环的交流电动机控制策略。

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Then the drive system of the fin stabilizer is analyzed. To give a control policy which AC motor is controlled by applying electric current loop, speed loop, position loop in this system.

然后对转鳍驱动系统进行了分析，确定了在系统中使用电流环、速度环、位置环的交流电动机控制策略。

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