步进电机和伺服电机有什么不同？

伺服电机和步进电机有什么不一样的地方？机电设备中伺服电机和步进电机用的都很多，两者之间价格却相差甚远。

首先我们来看步进电机，它是将电脉冲信号转变为角位移或线位移的开环控制元步进电机件，在非超载的情况下，电机的转速、停止的位置只取决于脉冲信号的频率和脉冲个数，而不受负载变化的影响，当步进驱动器接收到一个脉冲信号，它就驱动步进电机安设定的方向转动一个固定的角度，称为“步距角”，它的旋转是以固定的角度一步一步运行的。可以通过控制脉冲个数来控制角位移量，从而达到准确定位的目的，同时可以通过控制脉冲频率来控制电机转动的速度和加速度，从而达到高速的目的。

伺服电机又称执行电机，在自动控制系统中，用作执行元件，把收到的电信号转换成电机轴上的角位移或角速度输出。伺服电机内部的转子是永磁铁，驱动器控制的U/V/W三相电形成电磁场，转子在此磁场的作用下转动，同时电机自带的编码器反馈信号给驱动器，驱动器根据反馈值与目标值进行比较，调整转子转动的角度。伺服电机的精度决定于编码器的精度(线数)也就是说伺服电机本身具备发出脉冲的功能，它每旋转一个角度，都会发出对应数量的脉冲，这样伺服驱动器和伺服电机编码器的脉冲形成了呼应，所以它是闭环控制，步进电机是开环控制。

 下面我们来看两者之间点的主要区别在哪里？

1、控制精度：步进电机的相数和拍数越多，它的精确度就越高，伺服电机取块于自带的编码器，编码器的刻度越多，精度就越高；

 2、低频特性：步进电机在低速时易出现低频振动现象，当它工作在低速时一般采用阻尼技术或细分技术来克服低频振动现象，伺服电机运转非常平稳，即使在低速时也不会出现振动现象；

3、矩频特性：步进电机输出力矩随转速的升高而下降，高速时会急剧下降，伺服电机在额定转速内为恒力矩输出，在额定转速上为恒功率输出；

 4、过载能力：步进电机不具备过载能力，伺服电机有较强的过载能力；

5、速度响应性能：步进电机从静止加速到工作转速需要上百毫秒，而交流伺服系统的加速性能较好，一般只需几毫秒，可用于要求快速启停的控制场合。

 6、运行性能：步进电机的控制为开环控制，启动频率过高或负载过大易丢步或堵转的现象，停止时转速过高易出现过冲现象，交流伺服驱动系统为闭环控制，驱动器可直接对电机编码器反馈信号进行采样，内部构成位置环和速度环，一般不会出现步进电机的丢步或过冲的现象，控制性能更为可靠。

1FK7103-5AF71-1AA0

1FK7103-5AC71-1KG5

1FK7103-5AC71-1FH0

1FK7103-5AC71-1FG5

1FK7103-5AC71-1DG5

1FK7103-5AC71-1DG2

1FK7103-5AC71-1DA5

1FK7103-2AF71-1RG0

1FK7103-2AF71-1RB1

1FK7103-2AF71-1RA1

1FK7103-2AF71-1RA0

1FK7103-2AF71-1QA0

1FK7103-2AF71-1PA0

1FK7103-2AF71-1CH2

1FK7103-2AF71-1CH1

1FK7103-2AF71-1CH0

1FK7103-2AF71-1CG1

1FK7103-2AF71-1CG0

1FK7103-2AF71-1BG1

1FK7103-2AF71-1AG1

1FK7103-2AF71-1AB0

1FK7103-2AC71-1RH0

1FK7103-2AC71-1RG1

1FK7103-2AC71-1RB0

1FK7103-2AC71-1RA0

1FK7103-2AC71-1QG0

1FK7103-2AC71-1QB0

1FK7103-2AC71-1QA0

1FK7103-2AC71-1CH1

1FK7103-2AC71-1CG1

1FK7103-2AC71-1CB1

1FK7103-2AC71-1BG1

1FK7103-2AC71-1BA0

1FK7103-2AC71-1AH1

1FK7101-5AZ91-1ZZ9-Z

1FK7101-5AF7-1FH0

1FK7101-5AF71-1UG0

1FK7101-5AF71-1UA3

1FK7101-5AF71-1UA0

1FK7101-5AF71-1TA0

1FK7101-5AF71-1SH0

1FK7101-5AF71-1SG3

1FK7101-5AF71-1SG0，

1FK7101-5AF71-1SG0

1FK7101-5AF71-1SAO

1FK7101-5AF71-1SA3

1FK7101-5AF71-1SA0

1FK7101-5AF71-1PH0

1FK7101-5AF71-1PB0

1FK7101-5AF71-1PA0

1FK7101-5AF71-1KH5

1FK7101-5AF71-1KG5

1FK7101-5AF71-1HG5

1FK7101-5AF71-1GG0

1FK7101-5AF71-1FH5

1FK7101-5AF71-1FH3

1FK7101-5AF71-1FH2

1FK7101-5AF71-1FH0

1FK7101-5AF71-1FG5

1FK7101-5AF71-1FG3

1FK7101-5AF71-1FG2

1FK7101-5AF71-1FG0

1FK7101-5AF71-1FB0 1

1FK7101-5AF71-1FB0

1FK7101-5AF71-1FA0

1FK7101-5AF71-1EH3

1FK7101-5AF71-1EH2

1FK7101-5AF71-1EH2

1FK7101-5AF71-1EH0

1FK7101-5AF71-1EG5

1FK7101-5AF71-1EG3-ZN16

1FK7101-5AF71-1EG3-Z

1FK7101-5AF71-1EG3

1FK7101-5AF71-1EG0

1FK7101-5AF71-1EB2

1FK7101-5AF71-1EB0

1FK7101-5AF71-1DU5-Z

1FK7101-5AF71-1DH5

1FK7101-5AF71-1DH3

1FK7101-5AF71-1DH0

1FK7101-5AF71-1DG5

1FK7101-5AF71-1DG3

1FK7101-5AF71-1DG0

1FK7101-5AF71-1AU5-Z

1FK7101-5AF71-1AH3

1FK7101-5AF71-1AH2

1FK7101-5AF71-1AH0，

1FK7101-5AF71-1AH0

1FK7101-5AF71-1AG8

1FK7101-5AF71-1AG5

1FK7101-5AF71-1AG3

1FK7101-5AF71-1AB0

1FK7101-5AF71-1AA5

1FK7101-5AF71-1AA2

1FK7101--5AF71-1AA0

1FK7101-5AF71-1AA0

1FK7101-5AC71-1UG5-Z

1FK7101-5AC71-1UG3-Z

1FK7101-5AC71-1UA3

1FK7101-5AC71-1SA0

1FK7101-5AC71-1FG3

1FK7101-5AC71-1EH5

1FK7101-5AC71-1EG2

1FK7101-5AC71-1EA5

1FK7101-5AC71-1EA1

1FK7101-5AC71-1DH5

1FK7101-5AC71-1DG5

1FK7101-5AC71-1DB3

1FK7101-3BF71-1RG1

1FK7101-2AF71-1UA0

1FK7101-2AF71-1RH1

1FK7101-2AF71-1RH0

1FK7101-2AF71-1RG2

1FK7101-2AF71-1RB0

1FK7101-2AF71-1RA2

1FK7101-2AF71-1RA1

1FK7101-2AF71-1PA2

1FK7101-2AF71-1EH2

1FK7101-2AF71-1CH2

1FK7101-2AF71-1CH1

1FK7101-2AF71-1CG1

1FK7101-2AF71-1BH1

1FK7101-2AF71-1BG1

1FK7101-2AF71-1BG0

1FK7101-2AF71-1AH0

1FK7101-2AC71-1UA0

1FK7101-2AC71-1RH1

1FK7101-2AC71-1RG1

1FK7101-2AC71-1RA1

1FK7101-2AC71-1QG0

1FK7101-2AC71-1QB0

1FK7101-2AC71-1CH1

1FK7101-2AC71-1CB0

1FK7101-2AC71-1CA0

1FK7101-2AC71-1BG2

1FK7100-SAF71-1SB0

1FK7100-5AZ91-1ZZ9-ZS05

1FK7100-5AZ91-1ZZ9-Z

1FK7100-5AF71-1UH0

1FK7100-5AF71-1UA3，

1FK7100-5AF71-1UA3

1FK7100-5AF71-1TH0

1FK7100-5AF71-1T?0

1FK7100-5AF71-1SH0，

1FK7100-5AF71-1SG0

1FK7100-5AF71-1SA2

1FK7100-5AF71-1PH0

1FK7100-5AF71-1PG0

1FK7100-5AF71-1KV5-Z

1FK7100-5AF71-1KG5，

1FK7100-5AF71-1KG5

1FK7100-5AF71-1FH5

1FK7100-5AF71-1FH0

1FK7100-5AF71-1FG5，

1FK7100-5AF71-1FG5

1FK7100-5AF71-1EU5-Z

1FK7100-5AF71-1EH0

1FK7100-5AF71-1DU5-Z

1FK7100-5AF71-1DS5

1FK7100-5AF71-1DH0

1FK7100-5AF71-1DG5

1FK7100-5AF71-1DG3

1FK7100-5AF71-1DA0

1FK7100-5AF71-1AU5-Z

1FK7100-5AF71-1AH0

1FK7100-5AF71-1AG2

1FK7100-5AF71-1AG0，

1FK7100-5AF71-1AA2

1FK7100-5AC71-1DG0-Z

1FK7100-5AC71-1DG0

1FK7100-2AF71-1RH1

1FK7100-2AF71-1RG1

1FK7100-2AF71-1EG0

1FK7100-2AF71-1CH2

1FK7100-2AF71-1CH1

1FK7100-2AF71-1CH0

1FK7100-2AF71-1CG1

1FK7100-2AF71-1CG0

1FK7100-2AF71-1BG0

1FK7100-2AC71-1RH0

1FK7100-2AC71-1CG1

1FK7088-5AF71-1SA0

1FK7086-7SF71-1FH3

1FK7086-7AF71-1UG0

1FK7086-7AF71-1TG0-Z

1FK7086-7AF71-1TG0

1FK7086-7AF71-1SH5-Z

1FK7086-7AF71-1SH0-Z

1FK7086-7AF71-1SG0

1FK7086-7AF71-1SB5

1FK7086-7AF71-1PA0

1FK7086-7AF71-1KH3-ZN25

1FK7086-7AF71-1KG0

1FK7086-7AF71-1GH3

1FK7086-7AF71-1FH5

1FK7086-7AF71-1FH0

1FK7086-7AF71-1FG3

1FK7086-7AF71-1FG0

1FK7086-7AF71-1FB8

1FK7086-7AF71-1FB5-ZN05

1FK7086-7AF71-1FB5-Z

1FK7086-7AF71-1FA8

1FK7086-7AF71-1FA5-Z

1FK7086-7AF71-1EH3

1FK7086-7AF71-1EG0

1FK7086-7AF71-1EA0

1FK7086-7AF71-1DG2

1FK7086-7AF71-1AG0

1FK7086-7AF71-1AA2

1FK7086-7AA71-1UA3

1FK7086-4CF71-1RB0

1FK7086-4CF71-1RA0

1FK7086-4CF71-1QB0

1FK7086-4CF71-1CH1

1FK7086-4CF71-1CG1

1FK7086-4CF71-1CB0

1FK7086-4CF71-1BH1

1FK7086-4CC71-1CG1

1FK7086-4CC71-1AA0

1FK7085-7AF71-1GH0

1FK7085-7AF71-1FH3

1FK7085-7AF71-1FH0

1FK7085-7AF71-1FA0

1FK7085-7AF71-1EH3

1FK7085-7AF71-1EA0

1FK7085-7AF71-1DG5

1FK7085-7AF71-1AB0

1FK7085-4CF71-1CH1

1FK7085-4CF71-1CH0

1FK7085-4CF71-1CG1

1FK7084-3BF71-1RH0

1FK7084-3BF71-1CG1

1FK7084-3BF71-1CB0

1FK7084-3BF71-1CA0

1FK7084-3BC71-1RG1

1FK7084-3BC71-1FG0

1FK7084-3BC71-1CG0

1FK7084-3BC71-1CA0

1FK7084-2AF71-1UG0-Z

1FK7084-2AF71-1RH1

1FK7084-2AF71-1RH0

1FK7084-2AF71-1RG0

1FK7084-2AF71-1RB0

1FK7084-2AF71-1RA0

1FK7084-2AF71-1QA