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Frequency-Response Methods for Synthesizing Controlled High-Speed Electric Drives of Compressors

机译：频率控制方法合成压缩机的受控高速电力驱动器

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摘要

Frequency-response methods for analyzing and synthesizing current and electromagnetic torque control loops in alternating-current electric drives are proposed. It is shown that, when solving the problems of analysis and synthesis of the current and torque control loops, the unchanged part of the electric drive can be approximated by a linear system with the amplitude-modulated signal. It has been established that the transient and steady-state processes of variables in the motor’s phase windings can be considered in the current and torque loops independently. The use of frequency-response methods for identification of controlled objects allows consideration of the cross-magnetic links between the three-phase windings of the electric machine and the mathematical description of the system can be represented by a simplified set of equations, which is convenient for setting up and adjusting the system by engineering personnel. Using experimental Bode plots, it has been shown that the steady frequency passband in the current control loop can reach 4000 rad/s, which facilitates the adjustment of the toque control loop when the drive is running at a speed of 6000 rpm. A further increase in the speed of the drive with the specific mass and dimensional parameters preserved at the same level can be achieved only by introducing correction signals. It is shown that in multiphase electric drives with more than three phases, the phase winding zone decreases and the leakage inductive reactance of the phase winding decreases, which allows a significant expansion of the frequency passband in the current, torque, and speed control circuits.
机译：提出了一种频率响应方法，用于分析和合成交流电驱动器中的电流和电磁转矩控制回路。结果表明，当解决电流和转矩控制回路的分析和综合问题时，可以通过具有调幅信号的线性系统来近似估计电驱动器的不变部分。已经确定，可以在电流和转矩回路中独立考虑电动机相绕组中变量的瞬态和稳态过程。使用频率响应方法识别受控对象可以考虑电机三相绕组之间的交叉磁链，并且系统的数学描述可以用简化的方程组表示，这很方便由工程人员设置和调整系统。使用实验的Bode图，已显示出电流控制回路中的稳定频率通带可以达到4000 rad / s，这有助于在驱动器以6000 rpm的速度运行时调节转矩控制回路。仅通过引入校正信号，才能在保持相同质量的特定质量和尺寸参数的情况下进一步提高驱动器的速度。结果表明，在具有多于三相的多相电驱动器中，相绕组区域减小，相绕组的漏感电抗减小，这使得电流，转矩和速度控制电路中的频率通带显着扩展。

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