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系统结构
实现软起动也是可以用开环系统来实现的，它使环境的到抑制扰动的影响比如温度等湿度等环境因素,：用闭环负反馈控制系统来实现软起动更为稳定如图9所示，使起动电流作为反馈施加给软启的动控制环节，这一环节通过的可以计算的规律来控制晶闸管触发角的改变,调节作电机定子的作用电压,：当电流反馈值超过电流限定值时，触发角不变直至电流降下降才会变小,而输出电压随之上升至全压。
(2)模型构建
由于本模型较复杂，为了实现系统的模块化管理，对构成反并联晶闸管电路、触发电路、软起动控制环节的多个标准基本模块分别采用Simulink的封装技术，将它们集成在一起，形成新的功能模块，构建如图10软起动仿真模型。
分析仿真结果，可知:起始电压设定的越低，转速上升就越快，起动时间就越短。上升速率设定的越大，转速上升的越快，起动过程就越短。
三相异步电机是靠接入三相交流电源（相位差120度）供电的一类电动机。由于三相异步电机的转子与定子旋转磁场以相同的方向、不同的转速成旋转，存在转差率，叫三相异步电机。按照转子结构形式可分为：鼠笼式和绕线式两类。鼠笼式比绕线式异步电动机的价格便宜，结构简单、维护方便，在一般性的生产机械中应用为广泛。
启动电流带来的影响：启动电流过大使电压损失过大，启动转矩不够使电动机根本无法启动；使电动机绕组发热，绝缘老化，从而缩短了电动机的使用寿命；造成过流保护装置误动作、跳闸；使电网电压产生波动，进而形成影响连接在电网上的其他设备的正常运行。电动机启动时，在保证大小的启动转矩的前提下，还要求限制启动电流在允许的范围内。
MICRO MOTION TRANSMITTER FIELD MOUNT MOD# 1700R11ABUEZZZ
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Micro Motion Transmitter Model: RFT9712-3KNU, .
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Micro Motion Transmitters Installation Operation Manual
Micro Motion Type 700 Remote 9 to 4-Wire Core Processor2009 A20 (1727)
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Micro Motion Type 700 Remote 9 to 4-Wire Core Processor 2010NIB
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Micro Motion Type 800 Enhanced Core Processor ExtendedMount E8 (1736)
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MMI Micro Motion 0259501 Rev G 025-9501 Drive Board
MMT Micro Motion Technology / D1-618-L5 / Linear StagePositioner
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ModBus Mapping Assignments for Micro Motion Transmitter,
National Aperture NAI Motion MC-5B Micro Positioning StageController
National Aperture NAI Motion MC-5B Micro Positioning StageController
NCR 2170 Micro Motion 176 Key Keyboard POS NCR008-0219410497-0407513 99031660
ADVANCED MICRO SYSTEMSMOTION CONTROLLER SAX-232-EDC
Cooper OMC-DT-0701-ROff White Micro Set Dual Tech Motion Sensor 32 KHZ
EMERSON Micro Motion2400S Analog Transmitter w/o User Interface and Housing
EMERSON MICRO MOTIONPCADRIVE BOARD 0276501 F0276501
EMERSON MICRO MOTIONPCAPROCELAMEX BOARD 1004669 REV.B F1004669
ePIR Pure Digital MicroAuto PIR Curtain Lens Motion Detector Security Alarm
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listing Micro MotionCMF010M314NRAUEZZZ Mass Flow Sensor
listing Micro MotionRFT9739 E1SU Elite Remote Flow Transmitter C14 (1945)
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MicroMotion MicroMotion CMF025M313NC Flow Sensor
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Schneider ElectricMotion IM483 Microstepping Driver Micro Stepper
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port ESA-C Motion ControllerElectrostrictive Micro/u Drive
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