With the model , direct starting , increasing voltage starting and current limit starting are studied and compared . the results of simulation suggest that current limit starting has good performance in starting current and torque limit and their oscillation restraint 从仿真结果可以看出，无论在减小起动电流冲击、减小起动转矩冲击，还是在抑制电机电流、转矩振荡方面，采用限流软起动方式都表现出良好的性能。
Yl series single phase two value capacitor induction motor is designed and manufactured in accordance with state standards , with outstanding performance of starting and operation , low noise , compact dimensions , light weight , easy maintenance , etc . these motors are widely used in air compressors Yl系列单相电容起动电动机符合iec标准，适用于要求起动转矩大且对起动电流小电力供应受限制的地域，可广泛应用于水泵空气压缩机农业建筑业制造业。
Yc ycl series single - phase heavy - duty capacitor start asynchronous motor is suitable for driving small lathe and water pump , especially good for families and workshops where only single - phase power is available . this series motors are designed with advanced technique and made of fine materials Yc ycl系列大马力单相电容起动电动机及ycl系列大马力单相电容起动运转电动机符合iec标准，起动转矩大运行可靠，适用于水泵空压机农业灌溉业建筑业制造业。
During the process of numerical calculation of electromagnetic , the stator terminal voltage is set as restriction condition and the starting current is iterated in order to obtain the starting current and starting torque under the rating voltage . finally , the calculated results and measured results are compared to test that the calculation of starting performance can agree with the need of practical engineering project 在电磁场的数值计算过程中，以定子端电压为约束条件，对定子起动电流进行了迭代计算，得到了额定电压下的起动电流和起动转矩，最后把正弦电磁场计算结果与实测结果进行了对比，表明复合笼条转子感应电动机起动性能的计算结果满足工程实际的需要。
Soft starters decline only the electric voltage and do not decline the frequency , and make the starting torque turn small , therefore the soft starters be applicable only to the induction motors which drive the low starting torque machine such as blower fan and pump . this paper designed a soft starter adopting the discrete frequency method to start induction motors . it declines not only the electric voltage , but also makes the frequency lower at the same time , so starting torque turns more 由于软起动器只降压不降频，电机的起动转矩较小，所以传统软起动器只适用于风机、水泵类低起动转矩的负载。本文设计并研制了一种采用分级变频方法的新型软起动控制器，在降压的同时实现有级变频，从而提高了异步电动机的起动转矩。
In all control modes especially when ev starts up at low speed with full load , it realizes round magnetic chain , stator current observers and full speed control model and makes ev have higher torque , and good climbbing capability with constant power and have high output speed with constant torque . all of these above provide control system behavior with good robust and sidiling mode 在各控制方案中，尤其在电动汽车低速起动和满负荷低速行驶时，实现了圆形磁链的拟合，定子电流观测器和全速度控制模型控制方案，使电动汽车在恒功率状态下具有较大的起动转矩和爬坡提速性能，在恒转矩状态下具有较大的速度输出，从而使该控制系统达到了较好的鲁棒性、滑模性。
Y series has the advantages of high efficiency , energy saving , fine operation performance , small vibration , low noise , long service life , high reliablility , convenient maintenance , big breakaway tor que , fixing measurement and power grade completely conform to iec standard . it enploys grade b insulation , ip44 class for shell protection and ic411 cooling mode 系列电动机具有高效、节能、性能好、振动小、噪声低、寿命长、可靠性高、维护方便、起动转矩大等优点。安装尺寸和功率等级完全符合iec标准。采用b级绝缘、外壳防护等级为ip44 ，冷却方式ic411 。
The theory of discrete frequency method is analyzed , and is simulated . the results show that the application of discrete frequency method can not only reduce the current impact , but also increase the starting torque . the thesis analyses detailedly and designs the system ' s hardware units and software units 论文对分级变频理论进行了深入剖析，并利用matlab对分级变频起动过程进行了仿真，论证了运用分级变频起动不仅可以减小电流冲击，而且可以提高起动转矩。
Currently , many motor were used in electric vehicles , switched reluctance motor ( srm ) seems to be one of the best solution of electric vehicles driving motor due to its good performance such as simple structure , low - cost , efficient system , multi - controllable parameters , start - up currents is small but start - up torque is high . it has great potential for development 目前,作为电动汽车驱动用电机有很多,开关磁阻电机因其结构简单、成本低、整个系统具有效率高、可控参数多、起动电流小、起动转矩大等特点,是极具发展潜力的电动车驱动电机之一。
Serie three - phase asynchronous motor is designed for europe market , the terminal box is located on the top of motor , the motor structure is compact and the appearance is attractive , the signs and nominal value are all in conformity with iec standards the motor have some good feature , such as high effecient , energy - saving , high starting torque and easy maintenance etc 该系列电机是专为欧洲市场设计的三相异步电机、电机出线盒置于电机机壳顶部、整机结构紧凑、外形美观大方，安装尺寸符合iec标准，具有高效、节能、起动转矩大，使用维护方便等特点。
