可实现电机输入电源功率因数的改善，减轻其容量。
It can obtain the improve of power factor of the input motor power, and can lighten its capacity.
结果水泵有效功率和输入功率均随着电机频率的下降而不断降低，同时水泵效率也随着频率下降而降低。
The results show that available power and power input of water pump continuously decline with motor frequency reducing, and pump efficiency also decrease at the same time.
基于对电机输入瞬时有功无功功率的分析，提出一种新的永磁同步电机瞬时功率控制方案。
Based on instantaneous power analysis, an instantaneous power control method of permanent magnet synchronous machine (PMSM) is proposed in this paper.
L 297芯片产生脉宽可调的脉冲相序信号，该信号作为双极性桥式功率驱动电路的输入信号，放大后驱动步进电机。
L297 chip generates pulse phase sequence signals of which the pulse width is adjustable. The signals are the input ones of dual bridge driving circuit and drive the stepper motor after amplification.
传统的PSS使用本地可测量的发电机电磁功率、转速等作为输入信号以抑制低频振荡。
The traditional PSS use the local signal such as the generator electromagnetism power or shaft speed as its input to restrain low frequency oscillation.
依据输入滤波器输出阻抗极大值最小原则对基于阻尼补偿的直流发电机带恒功率负载系统输入滤波器参数进行了最优设计，给出了设计方法和流程。
Optimal design for input filter parameters in the system is accomplished to obtain the minimization of peak output impedance, and the design process is discussed in detail.
依据输入滤波器输出阻抗极大值最小原则对基于阻尼补偿的直流发电机带恒功率负载系统输入滤波器参数进行了最优设计，给出了设计方法和流程。
Optimal design for input filter parameters in the system is accomplished to obtain the minimization of peak output impedance, and the design process is discussed in detail.
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