Stability analysis in induction motor driven by V/f controlled general purpose inverter
Stability analysis in induction motor driven by V/f controlled general purpose inverter
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DOI：
10.1109/28.126758
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发表时间：
1990-10
期刊：
影响因子：
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通讯作者：
R. Ueda;T. Sonoda;Mizuhiko Ichikawa;K. Koga
中科院分区：
文献类型：
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作者：
R. Ueda;T. Sonoda;Mizuhiko Ichikawa;K. Koga
对于由幅度和频率可调的正弦电压源（例如脉宽调制（PWM）逆变器）驱动的感应电动机，当驱动器欠载时经常观察到持续振荡的发生。为了解决这个问题，考虑了线性化模型。阐明了振荡产生的条件以及如何确定定子电压与频率的振荡范围。并对分析结果进行了物理解释。研究发现，当转子回路时间常数大于转子运动的机械时间常数时，电机会变得不稳定，而瞬态电感的存在抑制了不稳定，使电机稳定。在等效磁化电流幅值轴和定子频率轴组成的平面内存在两条限制振荡范围的渐近线。
For an induction motor driven by a sinusoidal voltage source of adjustable amplitude and frequency, such as a pulse-width-modulation (PWM) inverter, the occurrence of sustained oscillations has often been observed when the drive is underloaded. In order to solve this problem, a linearized model is considered. The conditions under which the oscillations originate and how to determine the oscillating range in the stator voltage versus frequency are clarified. A physical explanation is also given for the analytical results. It is found that the motor becomes unstable when the rotor circuit time constant becomes larger than the mechanical time constant in rotor motion: however, the existence of transient inductance works so as to suppress the instability and stabilize the motor. There exist two asymptotes which restrict the oscillating range in the plane composed of the axis of the equivalent magnetizating current magnitude and that of stator frequency.>