薄煤层电牵引采煤机牵引部结构设计（全套含CAD图纸）
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英文原文SWITCHEDRELUCTANCEMOTORSDRIVEFORTHEELECTRICALTRACTIONINSHEARERHCHENCOLLEGEOFINFORMATIONANDELECTRICALENGINEERINGCHINAUNIVERSITYOFMININGMOTORCONTROLSHEARERCOALMINEELECTRICALDRIVEIINTRODUCTIONTHEUNDERGROUNDSURROUNDINGSOFTHECOALMINESAREVERYEXECRABLEONESIDE,ITISTHEMOIST,HIGHDUSTANDINFLAMMABLESURROUNDINGSONTHEOTHERSIDE,THESPACEOFROADWAYISLIMITEDSINCEITISNECESSARYTOSAVETHEINVESTMENTOFEXPLOITINGCOALMINESSOTHATITISDIFFICULTTOMAINTAINTHEEQUIPMENTSINTHEMODERNCOALMINES,THEAUTOMATIZATIONEQUIPMENTSCOULDBEUSEDWIDELYTHEFAULTSOFTHEAUTOMATIZATIONEQUIPMENTSCOULDAFFECTTHEPRODUCTIONANDTHEBENEFITOFTHECOALMINESTHESHEARERISTHEMININGEQUIPMENTTHATCOALCOULDBECUTFROMTHECOALWALLTHETRADITIONALSHEARERWASDRIVENBYTHEHYDROSTATICTRANSMISSIONSYSTEMTHEFAULTRATIOOFTHEHYDROSTATICTRANSMISSIONSYSTEMISHIGHSINCETHEFLUIDINHYDROSTATICTRANSMISSIONSYSTEMCOULDBEPOLLUTEDEASILYTHEFAULTSOFTHEHYDROSTATICTRANSMISSIONSYSTEMCOULDAFFECTTHEPRODUCTIONANDTHEBENEFITOFTHECOALMINESDIRECTLYTHEFAULTRATIOOFTHEMOTORDRIVESYSTEMISLOWERTHANTHATOFTHEHYDROSTATICTRANSMISSIONSYSTEM,BUTITISDIFFICULTTOCOOLTHEMOTORDRIVESYSTEMINCOALMINESSINCETHEMOTORDRIVESYSTEMSHOULDBEINSTALLEDWITHINTHEFLAMEPROOFENCLOSUREFORSAFETYPROTECTIONTHEMOTORDRIVESYSTEMISALSOONEOFTHEPIVOTALPARTSINTHEAUTOMATIZATIONEQUIPMENTSTHEDEVELOPMENTOFTHENOVELTYPESOFTHEMOTORDRIVESYSTEMHADBEENATTACHEDIMPORTANCETOBYTHECOALMINESTHESWITCHEDRELUCTANCEMOTORDRIVECOULDBECOMETHEMAINEQUIPMENTSFORADJUSTABLESPEEDELECTRICALDRIVESYSTEMINCOALMINES1,BECAUSEITHASTHEHIGHOPERATIONALRELIABILITYANDTHEFAULTTOLERANTABILITY2THESWITCHEDRELUCTANCEMOTORDRIVEMADEUPOFTHEDOUBLESALIENTPOLESWITCHEDRELUCTANCEMOTOR,THEUNIPOLARPOWERCONVERTERANDTHECONTROLLERISFIRMINTHEMOTORANDINTHEPOWERCONVERTERTHEREISNOBRUSHSTRUCTUREINTHEMOTORANDNOFAULTOFAMBIPOLARPOWERCONVERTERINTHEPOWERCONVERTER34THESWITCHEDRELUCTANCEMOTORDRIVECOULDBEOPERATEDATTHECONDITIONOFLACKEDPHASESFAULTDEPENDEDONTHEINDEPENDENCEOFEACHPHASEINTHEMOTORANDTHEPOWERCONVERTER5THEREISNOWINDINGINTHEROTORSOTHATTHEREISNOCOPPERLOSSINTHELOSSANDTHEREISONLYLITTLEIRONLOSSINTHEROTORITISEASYTOCOOLTHEMOTORSINCEITISNOTNECESSARYTOCOOLTHEROTORTHESHEARERDRIVENBYTHESWITCHEDRELUCTANCEMOTORDRIVEHADBEENDEVELOPEDTHEPAPERPRESENTEDTHEDEVELOPEDPROTOTYPEIISYSTEMCOMPONENTSTHEDEVELOPEDSWITCHEDRELUCTANCEMOTORSDRIVEFORTHEELECTRICALTRACTIONINSHEARERISATYPEOFTHEDOUBLESWITCHEDRELUCTANCEMOTORSPARALLELDRIVESYSTEMTHESYSTEMISMADEUPOFTWOSWITCHEDRELUCTANCEMOTORS,ACONTROLBOXINSTALLEDTHEPOWERCONVERTERANDTHECONTROLLERTHEADOPTEDTWOSWITCHEDRELUCTANCEMOTORSAREALLTHREEPHASE12/8STRUCTURESWITCHEDRELUCTANCEMOTOR,WHICHWERESHOWNINFIGURE1THETWOSWITCHEDRELUCTANCEMOTORSWEREPACKINGBYTHEEXPLOSIONPROOFENCLOSURE,RESPECTIVELYTHERATEDOUTPUTPOWEROFONEMOTORIS40KWATTHEROTORSPEED1155R/MIN,ANDTHEADJUSTABLESPEEDRANGEISFROM100R/MINTO1500R/MINFIGURE1PHOTOGRAPHOFTHETWOTHREEPHASE12/8STRUCTURESWITCHEDRELUCTANCEMOTORTHEPOWERCONVERTERCONSISTSOFTWOTHREEPHASEASYMMETRICBRIDGEPOWERCONVERTERINPARALLELTHEIGBTSWEREUSEDASTHEMAINSWITCHESTHREEPHASE380VACPOWERSOURCEWASRECTIFICATEDANDSUPPLIEDTOTHEPOWERCONVERTERTHEMAINCIRCUITOFTHEPOWERCONVERTERWASSHOWNINFIGURE2FIGURE2MAINCIRCUITOFTHEPOWERCONVERTERINTHECONTROLLER,THEREWERETHEROTORPOSITIONDETECTIONCIRCUIT,THECOMMUTATIONCIRCUIT,THECURRENTANDVOLTAGEPROTECTIONCIRCUIT,THEMAINSWITCHESGATEDRIVERCIRCUITANDTHEDIGITALCONTROLLERFORROTORSPEEDCLOSEDLOOPANDBALANCINGTHEDISTRIBUTIONOFTHELOADSIIICONTROLSTRATEGYTHETWOSWITCHEDRELUCTANCEMOTORCOULDALLDRIVETHESHEARERBYTHETRANSMISSIONOUTFITINTHESAMETRACTIONGUIDEWAYSOTHATTHEROTORSPEEDOFTHETWOSWITCHEDRELUCTANCEMOTORSCOULDBESYNCHRONIZEDTHECLOSEDLOOPROTORSPEEDCONTROLOFTHEDOUBLESWITCHEDRELUCTANCEMOTORSPARALLELDRIVESYSTEMCOULDBEIMPLEMENTEDBYPIALGORITHMINTHESWITCHEDRELUCTANCEMOTOR1,THETRIGGEREDSIGNALSOFTHEMAINSWITCHESINTHEPOWERCONVERTERAREMODULATEDBYPWMSIGNAL,THECOMPARISONOFTHEGIVENROTORSPEEDANDTHEPRACTICALROTORSPEEDAREMADEANDTHEDUTYRATIOOFPWMSIGNALAREREGULATEDASFOLLOWS,WHERE,ISTHEGIVENROTORSPEED,ISTHEPRACTICALROTORSPEED,ISTHEDIFFERENCEOFTHEROTORSPEED,ISTHEINCREMENTOFTHEDUTYRATIOOFPWMSIGNALOFTHESWITCHEDRELUCTANCEMOTOR1ATKTIME,ISTHEINTEGRALCOEFFICIENT,ISTHEPROPORTIONCOEFFICIENT,EKISTHEDIFFERENCEOFTHEROTORSPEEDATKTIME,EK1ISTHEDIFFERENCEOFTHEROTORSPEEDATK1TIME,D1KISTHEDUTYRATIOOFPWMSIGNALOFTHESWITCHEDRELUCTANCEMOTOR1ATKTIME,ANDD1K1ISTHEDUTYRATIOOFPWMSIGNALOFTHESWITCHEDRELUCTANCEMOTOR1ATK1TIMETHEOUTPUTPOWEROFTHESWITCHEDRELUCTANCEMOTORDRIVESYSTEMISAPPROXIMATELYINPROPORTIONTOTHEAVERAGEDCSUPPLIEDCURRENTOFTHEPOWERCONVERTERASFOLLOWS,WHERE,P2ISTHEOUTPUTPOWEROFTHESWITCHEDRELUCTANCEMOTORDRIVESYSTEM,IINISTHEAVERAGEDCSUPPLIEDCURRENTOFTHEPOWERCONVERTERINTHESWITCHEDRELUCTANCEMOTOR2,THETRIGGEREDSIGNALSOFTHEMAINSWITCHESINTHEPOWERCONVERTERAREALSOMODULATEDBYPWMSIGNALTHEBALANCINGTHEDISTRIBUTIONOFTHELOADSBETWEENTHETWOSWITCHEDRELUCTANCEMOTORSCOULDBEIMPLEMENTEDBYFUZZYLOGICALGORITHMINTHEFUZZYLOGICREGULATOR,THEREARETWOINPUTCONTROLPARAMETERS,ONEISTHEDEVIATIONOFTHEAVERAGEDCSUPPLIEDCURRENTOFTHEPOWERCONVERTERBETWEENTHETWOSWITCHEDRELUCTANCEMOTORS,ANDTHEOTHERISTHEVARIATIONOFTHEDEVIATIONOFTHEAVERAGEDCSUPPLIEDCURRENTOFTHEPOWERCONVERTERBETWEENTHETWOSWIT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铁损。因为不需要冷却转子，所以很容易冷却电动机。由开关磁阻电动机传动的采煤机正在不断发展。本章介绍了发展的样机。系统组成电牵引采煤机的开关磁阻电动机传动是一个双重开关磁阻电动机并联传动系统。这个系统是由两个开关磁阻电动机，一个控制箱，这个控制箱是安装在功率变换器和控制器上。采用的开关磁阻电动机是三相12/8结构的开关磁阻电动机，如图一所示。双重开关磁阻电动机分别包装在防爆外壳内。电动机的额定功率是40KW，转速是1155R/MIN，调速范围是100R/MIN1500R/MIN。图一三相12/8结构的开关磁阻电动机功率变换器是由两个三相不对称桥式变换器并列组成。IGBTS是电路的主要开关元件。经整流后三相交流380V电源提供给功率变换器。功率变换器的主要电路如图二所示。图二功率变换器的主要电路控制器由转子位置检测电路，整流电路，电流和电压保护电路，主要开关的门极驱动电路和闭环调速数字控制器和负荷均衡分配组成。控制方法采用同一个牵引方法，双重开关磁阻电动机通过传送设备用来驱动采煤机，来确保双重开关磁阻电动机的转子速度同步运行。并联驱动的双重开关磁阻电动机的闭环转子调速回路可以通过比例积分算法来实现。在开关磁阻电动机1中，功率变换器主要开关的触发信号是通过PWM信号调制的。比较给定的转子速度和实际的转子速度，PWM的占空比调节如下其中，是给定的转子速度，是实际的转子速度，是转子速度的差。在K时刻内，开关磁阻电动机1PWM信号占空比的增量。是积分系数，比例系数，转子速度在K时间内的差。转子速度在K1时间内的差，在K时刻内，开关磁阻电动机1PWM信号占空比，在K1时刻内，开关磁阻电动机1PWM信号占空比。开关磁阻电动机传动系统的输出功率和功率变换器的电流成正比，如下所示其中，是开关磁阻电动机传动系统的输出功率，功率变换器的平均直流电流。在开关磁阻电动机2中，功率变换器主要开关的触发信号是通过PWM信号调制的。双重开关磁阻电动机之间的负荷均衡分布是通过模糊逻辑算法来实现的。在模糊逻辑调节器中有两个输入控制参数，一个是双重开关磁阻电动机之间的功率变换器的平均电流的偏差，另一个是双重开关磁阻电动机之间的功率变换器的平均直流电流的偏差的变化。输出控制参数是开关磁阻电动机2PWM信号占空比的增量。电牵引采煤机双重开关磁阻电动机并列传动系统的方框图见图三所示。图三电牵引采煤机并列传动系统的方框图功率变换器平均直流电流在双重开关磁阻电动机之间的偏差在时刻为其中，在时刻，功率变换器在开关磁阻电动机1中实际平均直流电流，在时刻，功率变换器在开关磁阻电动机2中实际平均直流双重开关磁阻电动机在时刻的功率变换器平均直流电流的偏差的变量为其中，是双重开关磁阻电动机在时刻的功率变换器平均电流的偏差。开关磁阻电动机2在时的PWM信号的占空比为其中，在时刻的PWM信号占空比的增量，是开关磁阻电动机2在时刻的PWM信号的占空比。模糊逻辑算法用以下来表示其中，为模糊集合开关磁阻电动机间的功率变换器的平均直流电流的相对误差，为模糊集合开关磁阻电动机间的功率变换器的平均直流电流的相对误差的变量，为模糊集合中开关磁阻电动机2PWM信号占空比的增量。开关磁阻电动机间的功率变换器的平均直流电流的相对误差在，区间内的连续偏差可以转
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