Planetary gear train of automatic transmission for vehicle

A planetary gear train of an automatic transmission for a vehicle may include an input shaft receiving power from an engine, an output shaft configured to output power changed in speed, a first planetary gear set including first, second, and third rotating elements, a second planetary gear set including fourth, fifth, and sixth rotating elements, a third planetary gear set including seventh, eighth, and ninth rotating element, and six control elements which are disposed at positions where the rotating elements are selectively connected to each other. 本申请公开了种用于车辆的自动变速器的行星齿轮系，其可以包括：输入轴，其接收来自发动机的动力；输出轴，其配置为输出速度改变了的动力；第行星齿轮组，其包括第旋转元件、第二旋转元件和第三旋转元件；第二行星齿轮组，其包括第四旋转元件、第五旋转元件和第六旋转元件；第三行星齿轮组，其包括第七旋转元件、第八旋转元件和第九旋转元件；以及六个控制元件，其设置在旋转元件选择性地彼此连接的位置。