为了对通用电能质量控制器直流侧电压进行更为有效的控制，提出一种用于三相三线通用电能质量控制器(UPQC)直流侧电压控制的外环模型。
In order to make more effective control of universal power quality controllers (UPQC), an outer loop model for the voltage loop in a three-phase three-wire UPQC is proposed in the paper.
控制器对无刷直流电动机的转速控制至关重要，因此研究无刷直流电机的控制策略十分重要。
A good controller is crucial to speed control of brushless DC motor, so it is important for brushless DC motor to find out a good control method.
针对统一潮流控制器在逆变变换过程中所具有的直流侧电压不断波动的特点，提出了动态SPWM方法，以克服逆变电源的直流电压波动对SPWM法的逆变输出的精确性所造成的影响。
Taking account of the voltage floating of the DC side of Unified Power Flow Controller in working process, a dynamic SPWM method is proposed, to promote the accuracy of the output of the inverter.
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