伺服电机又称伺服马达，因其常用于风门调节，所以又常称其为风门执行器，在自动控制系统中，用作执行元件，把所收到的电信号转换成电动机轴上的角位移或角速度输出。分为直流和交流伺服电动机两大类，其主要特点是，当信号电压为零时无自转现象，转速随着转矩的增加而匀速下降。SIEMENS西门子的伺服马达在燃烧器行业应用较多，其主要的型号包括有SQN7、SQN3、SQM1、SQM2、SQM5等系列产品。本章节主要介绍SQN3系列的产品。德国SIEMENS西门子伺服电机系列西门子风门执行器SQN系列；SQN30.111A2700SQN30.111A3500SQN30.121A2700SQN30.121A3500SQN30.131A2700SQN30.151A2700SQN30.251A2700SQN30.401A2700SQN30.401A2730SQN30.431A2700SQN30.451A2700SQN30.402A2700SQN30.402A2730SQN30.402A2760SQN30.762A2700，SQN31.101A2700、SQN31.111A2700、SQN31.111A2760SQN31.121A2700、SQN31.121A2730、SON31.121A2760SQN31.151A2700、SON31.151A2730SQN31.221A2700、SQN31.221A2730SQN31.251A2700、SQN31.251A2730，SQN31.351A2700SQN31.4O1A2700、SQN31.4O1A2730SQN31.4O1A2760SQN31.411A2700、SQN31.411A2730SQN31.941A2700SQN31.201A2730SQN31.402A2700SQN31.102A2700SQN31.202A2700SQN31.252A2700西门子伺服电机SQN70系列；SQN70.224A20SQN70.244A20SQN70.264A20SQN70.294A20SQN70.324A20SQN70.424A20SQN70.454A20SQN70.464A20SQN70.464A23SQN70.624A20SQN70.664A20SQN70.664A23SQN74.294A21；SQN71.224A20SQN71.264A20SQN71.424A20SQN71.444A20SQN71.454A20SQN71.624A23SQN71.664A20SQN71.694A20；SQN75.224A21SQN75.224A26SQN75.236A21SQN75.244A21SQN75.244A26SQN75.294A21SQN75.294A26SQN75.2F6A21SQN75.424A21SQN75.444A21SQN75.524A26SQN75.6K4A21SQN75.621A26SQN75.664A26SQN75.694A21；SQN74.244A21，SQN74.294A21，SQN74.424A21，SQN74.444A21，SQN74.694A21，SQN74.864A21西门子伺服电机SQN90系列;SQN90.220A2799,SQN90.350A2799,SQN90.203A2799,SQN90.204A2799,SQN90.240B2799,SQN91.140B2799西门子风门执行器SQM系列；SQM10.15502SQM10.15562SQN10.16102SQM10.16502SQM10.16532SQM10.16562SQM10.17502；SQM20.18502，SQM21.18502，SQM21.16502；西门子风门执行器SQM50系列；SQM50.341A2SQM50.381A1SQM50.381A2SQM50.443A8SQM50.444A8SQM50.454A8SQM50.480A2SQM50.480A1SQM50.480A1Z3SQM50.481A2SQM50.481A2Z3SQM50.483A2SQM50.483A2Z3SQM50.483A1Z3SQM50.483A8Z3SQM50.681A2；SQM53.480A1SQM53.482A2SQM53.482A1Z3SQM53.482A2Z3SQM53.482A2Z4SQM53.482A2G4SQM53.489A2SQM53.582A；SQM54.481A208SQM54.482A2SQM54.580A2西门子伺服电机SQM40系列；SQM45.291A9，SQM45.295A9，SQM48.497A)