论文部分内容阅读
调节逆变器驱动的感应电机转差频率的反馈回路的应用被认为是代替常用的单独控制定子频率的一种方法,这种控制是用单独控制转差频率来实现的。对稳态情况而言,两种工作方式都显示了类似于分激和串激直流电机的特性。闭环形式的传递函数、各参数的无因次量和根的轨迹图被用来表达控制转差频率工作的动态特性,也被用来与普通工作(即非控制转差频率——译者)作特性比较。对超过一定尺寸和频率的几乎所有标准化的感应电机来说,总图上的参数范围是足够的。结果表明,在两种工作方式的比较中,转子瞬态时间常数对静态机电时间常数的比(?)是一个临界参数。由于这个参数随电机尺寸的加大而趋于提高,所以,与转差频率控制相关的优点对电机尺寸的依赖性就被显示出来。调节电机电压的速度控制回路也被考虑到,并被相同的根轨迹所描述,这个闭环系统的特性显示出了它对(?)和电机尺寸的很大依赖性。
The use of a feedback loop to adjust the slip frequency of an inverter-driven induction motor is considered as a replacement for the commonly used method of individually controlling the stator frequency by controlling the slip frequency separately. For steady-state conditions, both modes of operation show characteristics similar to those for split and series DC motors. The closed-loop transfer function, the dimensionless quantity of each parameter and the root locus graph are used to express the dynamic behavior of the work that controls the slip frequency. It is also used in conjunction with ordinary work (ie, uncontrolled slip frequency) For the characteristics of comparison. For almost all standardized induction motors over a certain size and frequency, the parameter range on the master plot is sufficient. The results show that the ratio of the rotor transient time constant to the static electromechanical time constant is a critical parameter in the comparison of the two operating modes. Since this parameter tends to increase as the size of the motor increases, the dependence on slip frequency control on the size of the motor is shown. The speed control loop that regulates the motor voltage is also taken into account and described by the same root locus. The characteristics of this closed-loop system show its great dependence on (?) And motor size.