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过载能力不同
步进电机一般不具有过载能力。交流伺服电机具有较强的过载能力。以三洋交流伺服系统为例，它具有速度过载和转矩过载能力。其最大转矩为额定转矩的二到三倍，可用于克服惯性负载在启动瞬间的惯性力矩。步进电机因为没有这种过载能力，在选型时为了克服这种惯性力矩，往往需要选取较大转矩的电机，而机器在正常工作期间又不需要那么大的转矩，便出现了力矩浪费的现象。
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厦门仲鑫达自动化设备有限公司
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五、运行性能不同
步进电机的控制为开环控制，启动频率过高或负载过大易出现丢步或堵转的现象，停止时转速过高易出现过冲的现象，所以为保证其控制精度，应处理好升、降速问题。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。
六、速度响应性能不同
步进电机从静止加速到工作转速（一般为每分钟几百转）需要200～400毫秒。交流伺服系统的加速性能较好，以山洋400W交流伺服电机为例，从静止加速到其额定转速3000RPM仅需几毫秒，可用于要求快速启停的控制场合。
综上所述，交流伺服系统在许多性能方面都优于步进电机。但在一些要求不高的场合也经常用步进电机来做执行电动机。所以，在控制系统的设计过程中要综合考虑控制要求、成本等多方面的因素，选用适当的控制电机。
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3RN1062-1CW00 F. 6 SENSOR,1NO+1NC,24-240VUC,SCREW CONN Siemens
3RN1062-2CW00 F. 6 SENSOR,1NO+1NC,24-240VUC,CAGE CLAMP Siemens
3RP1505-1AQ30 Time Relay Siemens
3RP1511-1AQ30 Timing Module Siemens
3RP1531-1AP30 Time Relay Off Delay Siemens
3RP1540-1AB30 Time Relay Siemens
3RP1574-1NQ30 Time Relay Siemens
3RR2242-1FW30 Monitoring Relay Siemens
3RS1000-2CK20 Temperature Monitoring Relay Siemens
3RT1015-1AB01 CONTACTOR,NONREV,S00,7A,24VAC,3P,SCRW Siemens
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3RT1015-1AD02 CONTACTOR,NONREV,S00,7A,42VAC,3P,SCRW,1N Siemens
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3RT1015-1AF02 CONTACTOR,NONREV,S00,7A,110VAC,3P,SCRW Siemens
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3RT1015-1AP02 CONTACTOR, AC-3 3 KW/400 V, Siemens
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3RT1015-1AP61 CONTACTOR,NONREV,S00,7A,240VAC,3P,SCRW Siemens
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3RT1015-1BB44-3MA0 CONTACTOR,S00,7A,24VDC,2NO2NC FIXED AUX Siemens
3RT1015-1BE42 CONTACTOR, AC-3 3 KW/400 V, Siemens
3RT1015-1BF41 CONTACTOR,NONREV,S00,7A,110VDC,3P,SCRW Siemens
3RT1015-1BF42 CONTACTOR,NONREV,S00,7A,110VDC,3P,SCRW Siemens
3RT1015-1BM41 CONTACTOR, AC-3 3 KW/400 V Siemens
3RT1015-1BP41 CONTACTOR,NONREV,S00,7A,230VDC,3P,SCRW Siemens
3RT1015-1BP42 CONTACTOR,NONREV,S00,7A,230VDC,3P,SCRW Siemens
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3RT1015-1JB41 CONTACTOR,COUP,S00,7A,24VDC,3P,SCRW,DIO Siemens
3RT1015-1JB42 CONTACTOR,COUP,S00,7A,24VDC,3P,SCRW,DIO Siemens
3RT1015-1KB41 CONTACTOR,COUP,S00,7A,24VDC,3P,SCRW,VAR Siemens
3RT1015-1KB42 CONTACTOR,COUP,S00,7A,24VDC,3P,SCRW,VAR Siemens
3RT1015-1MB41-0KT0 CONTACTOR,COUP,S00,7A,24VDC,3P,SCRW,NA Siemens
3RT1015-1MB42-0KT0 CONTACTOR,COUP,S00,7A,24VDC,3P,SCRW,NA Siemens
3RT1015-1WB41 CONTACTOR,COUP,S00,7A,24VDC,3P,SCRW,VAR Siemens
3RT1015-1WB42 CONTACTOR,COUP,S00,7A,24VDC,3P,SCRW,VAR Siemens
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3RT1015-2AK61 CONTACTOR,NONREV,S00,7A,120VAC,3P,CLMP Siemens
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3RT1015-2AP61 CONTACTOR,NONREV,S00,7A,240VAC,3P,CLMP Siemens
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3RT1015-2BB44-3MA0 CONTACTOR,S00,7A,24VDC,2NO2NC FIXED AUX Siemens
3RT1015-2BF41 CONTACTOR,NONREV,S00,7A,110VDC,3P,CLMP Siemens
3RT1015-2HB41 CONTACTOR,COUP,S00,7A,24VDC,3P,CLMP,NA Siemens
3RT1015-2HB42 CONTACTOR,COUP,S00,7A,24VDC,3P,CLMP,NA Siemens
3RT1015-2JB41 CONTACTOR,COUP,S00,7A,24VDC,3P,CLMP,DIO Siemens
3RT1015-2JB42 CONTACTOR,COUP,S00,7A,24VDC,3P,CLMP,DIO Siemens
3RT1015-2KB41 CONTACTOR,COUP,S00,7A,24VDC,3P,CLMP,VAR Siemens
3RT1015-2KB42 CONTACTOR,COUP,S00,7A,24VDC,3P,CLMP,VAR Siemens
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3RT1016-1BB41 CONTACTOR 24V 1NO 20AMP Siemens
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3RT1016-1BB44-0AA1 CONTACTOR,S00,9A,24VDC,2NO2NC VARISTOR Siemens
3RT1016-1BB44-3MA0 Contactor Module Siemens
