该文提出了一种采用内环空间矢量电流调节器和外环同步坐标比例积分控制器相级联的三相四桥臂逆变器的控制方案，实现了对三相四桥臂逆变器的解耦控制。

This paper presents a decoupled control scheme for three?phase four?leg inverter through an inner current regulator based on space vector cascaded with an outer synchronous frame PI controller.

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箱形伸缩臂作为汽车起重机的主要受力构件，其重量一般占整机的13 ~ 20%，而大型起重机占的比例则更大。

As the main stress component, box truck crane telescopic boom usually accounts for the weight machine for 13 ~ 20%, while the percentage of large cranes is greater.

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