The characteristic of frequency modulation has slowly start-up and finite area of modulate frequency;

During the start up of SFC period, much harmonic current are generated and cause the voltage source in the grid to be distorted, THD in gird increase.

使用变频启动装置过程中会产生大量谐波，造成电网电压畸变率增大。

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Discussion on the best start-up frequency of conversion regulating speed motor

变频调速电动机最佳启动频率探讨

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This paper describes lhe principles, mechanism, features and lectotype of SFC for300 MW Class Reversible Pumped-storage Units now prevailing in China.

详述了目前国内300MW等级抽水蓄能机组变频启动装置的原理、构成、特点和选型的原则。

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Through modulating frequency and speed, controlling the start-up current, running in high/ low speed without any shock, frequent start-up and shut down can be realized.

变频调速可抑制启动电流、无冲击地进行加减速运行、频繁地进行启动与停机实现合理控制。

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The principle of motor must be lucubrated. Therefore this thesis makes researches on the stator and rotor coupling rigid model when the generator starts up in frequency conversion. The results can provide theoretical reference to the design of generator.

本文针对变频启动时，电机在电磁激发的定转子耦合刚体模型的振动进行了理论的研究，为电机的可靠性设计提供了理论的参考。

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The technology of frequency conversion timing and soft start should be widely applied.

指出变频调速和软启动技术应该大力推广应用。

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Frequency conversion soft start out to the impact of the power grid start, reduce the power distribution costs, safe and reliable in operation.

变频软启动淘汰启动时对电网的冲击，降低配电费用，使用安全可靠。

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Study on the static frequency converter for gas turbine generator sets

燃气轮机发电机组静止变频启动装置研究

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Based on the characteristics of FPC, two starting methods called serial rotor resistance start and frequency conversion start are selected and analyzed in details. Both of two methods adopt direct cut-in mode.

根据FPC自身的特性，选用了转子串电阻启动和直接变频启动这2种启动方法，并进行了详细的理论和数字仿真分析。

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For saving costs, the paper made a detailed analysis of the principle of variable soft-start cycle, and proposed to control three pumps by one frequency converter. In order to manage a cycle frequency converter start.

为了节省成本，考虑到变频器的价格较贵，论文分析了循环变频软启动原理，采用一台变频器来控制三台水泵实现循环变频启动。

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Design of Synchronous Motor with Brushless Excitation Soft Start System

无刷励磁同步机变频软启动系统研究

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Considering the BEMF very little in the process of motor starting, the Back-EMF method is expired, combined with the rotor pre-setting method and the variable-frequency increase-voltage method, this paper realizes the open-loop start of motor using DSP.

针对电机起动时反电势比较小，很难通过反电势法来检测转子位置的情况，本文结合预定位法和变频升压的电机启动方式，利用DSP实现电机的开环软启动。

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Start-up performance of the air conditioner is studied and its soft-start feature reduces the investment cost of inverter.

研究了变频空调的启动性能，其软启动的特点降低了逆变器的投资成本。

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Study on frequency modulation starting and its features of Huizhou Natural Gas Turbine Combined-Cycle Power Plant

惠州天然气发电厂变频启动调速过程及特点

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Unfortunately, the SFC provides output voltage and current wave forms of a poor quality and consequently low torque and efficiency due to using Silicon Control Rectifier ( SCR) for the converter design, which cannot meet the requirements of the relevant state standard.

而变频启动装置由于采用可控硅（SCR）整流再逆变原理，其输出电压电流波形差，致使输出效率低、力矩小；另外，谐波分量大，不能满足国家相关标准要求。

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Study of Frequency-Variable Starting Process of Motor-Generator in Pump Storage Power Plant

抽水蓄能电站发电电动机变频启动过程的研究

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Considering Some Problems of Inverter-fed Motor s Design

浅谈变频电机设计时需考虑的一些问题

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Prevention of Bearing Current in Variable-Frequency Motor

变频电机轴电流的防止

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A fault diagnosis method for variable frequency motor is presented, which is based on advanced MCSA and fuzzy inference.

提出一种基于改进的定子电流信号分析（MCSA）和模糊推理的变频电机转子故障诊断方法。

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Evaluation of Aging Property of Nano-filled Insulation Resin Used for Inverter-fed Motor

变频电机用纳米复合绝缘薄膜老化性能的评估

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