在电压型PWM整流器的控制中，广泛采用在同步旋转坐标系下的直接电流控制方法和双闭环控制结构。
In the control of voltage source PWM rectifier, direct current control and dual close loop control structure ind-q synchronous reference frame are widely adopted.
针对这种情况，提出了一种双闭环控制结构和模糊控制方法，使得负载变化时保持电磁炉的输出功率稳定。
To solve this problem, in this paper we put forward a double closed-loop control configuration and a fuzzy control method to ensure the steady output power when the load changes.
其次采用了两种不同方法对斩波串级调速系统的斩波回路进行了建模和分析，并得到斩波双闭环控制结构图；
Then two different method is given to analyze chopper and mathematics model is based, so double-close-loop control chart is got.
针对这种情况，提出了一种双闭环控制结构和模糊控制方法，使得负载变化时保持感应加热电源的输出功率稳定。
To solve the problem, in this paper we put forward a double closed-loop control configuration and a fuzzy control method to ensure the steady output power when the load changes.
首先对磁场定向控制理论进行了详细分析，比较后采用间接磁场定向的控制方法，并建立基于同步电流内环、转速外环的双闭环控制结构。
Finally, the indirect vector control system is made as the research target and double close loop control systems which contain synchronous current inside loop and speed outside loop are introduced.
提出一种采用双谐振器敏感结构的谐振式传感器，传感器的敏感元件包括两个结构参数一致的谐振器，传感器的闭环控制系统由两个幅度控制器和一个反相器组成。
A new resonant sensor consisting of two resonators of uniform structure and size is presented. The closed loop control system is composed of two amplitude controllers and an inverter.
提出一种采用双谐振器敏感结构的谐振式传感器，传感器的敏感元件包括两个结构参数一致的谐振器，传感器的闭环控制系统由两个幅度控制器和一个反相器组成。
A new resonant sensor consisting of two resonators of uniform structure and size is presented. The closed loop control system is composed of two amplitude controllers and an inverter.
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