| 1. | Second , the forecasting model for the field current based on the fuzzy system is discussed
其次，本文介绍了基于模糊系统的转子电流预测原理。 |
| 2. | Study of process of starting pumped storage machine by static frequency converter with field current controlled
静止进相器无功补偿原理及其仿真研究 |
| 3. | According to the calculation results , the three - variable differential method is applied to estimate the field current and power angle of the synchronous generator
根据已有的计算结果，采用三元插值法估算同步发电机的励磁电流和功角。 |
| 4. | In addition , by using igbt in main loop of the system , control and operation of power elements is easy and reliable , and reversible flow of field current can be realized
而采用igbt构成系统的主回路，功率器件控制容易，工作可靠，可以实现励磁电流的可逆运行。 |
| 5. | In this paper the predictive system of field current is studied using takagi - sugeno fuzzy system . the input parameters are drawn from the turbo - generator ' s stator
因此，本文利用基于神经网络集成的高木一关野模糊系统来建立发电机正常运行时转子电流的预测模型。 |
| 6. | Seek the b ( t ) fieldwork curve and the time derivative curve dbz ( t ) / dt from the voltage decrease data generalized from field current that eliminating noise treated by wavelet ; 3
由经过小波消噪处理过的野外归一化的电压衰减数据求出b _ z ( t )实测曲线和它的时间导数曲线( |
| 7. | Meanwhile , fully - controlled igbt enables reversible flow of field current and reduce in the size of filter elements of main loop , so that the complete of device becomes smaller and lighter
而全控式的igbt不仅可实现励磁电流的可逆运行，而且由于提高斩波频率，使主回路滤波器件的体积大大减少，从而使整个装置体积减小、重量减轻。 |
| 8. | Motion control is a comprehensive subject . modern ac drive is a important embranchment in the field of motion control . however , it is difficult to rea1ize high - performance ac drive systems because induction motors are a kind of strongly - coupled nonlinear system with many variables and the torque is not easy to control . with vector control technology decoupling and torque control of ac motor are solved . the basic idea of vector control is that three - phase system is equiva1ent to two - phase system by coordinate transformation and it realizes the decoupling between field current and torque current of the stator in order to control the flux and current respectively , thus induction motor can be considered dc motor and high performance is achieved easily . with the progress of electric and electronic technology and the development of computer , high - integrated special modules and high - precision digital signal processor ( dsp ) are applied to ac drive so that vector control has been developed rapidly
但是高性能的交流调速系统实现很困难，这是因为交流电机是多变量、强耦合的非线性系统，不易实现高性能转矩控制。矢量控制技术则解决了交流电机解耦与转矩控制问题，其基本思路? ?应用坐标变换将三相等效为二相，实现定子励磁电流分量与转矩电流分量之间的解耦，达到对交流电机磁链与电流分别控制的目的，交流电机等效为直流电机实现高性能调速。随着电力电子技术的进步，计算机技术飞跃发展，高度集成的专用模块和高精度的数字信号处理器应用于交流传动系统中，促进矢量控制迅猛发展，日趋成熟。 |
| 9. | In the last part , the relationship of the field current with the operational factors of the turbo generator is difficult to express exactly , belonging to the complexity of building the generator model and the difficulty of identifying generator parameters , gp algorithm is presented , which is better than other method in symbol regress
由于发电机的建模与参数辨识困难，发电机励磁电流和机端量之间的关系难以用精确的数学表达式来描述。利用gp算法在符号回归中的应用，得出发电机励磁电流和机端量之间的关系表达式，用于故障诊断，并通过算例验证了该方法是有效的。 |
