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1·The result shows that the mid-voltage variable frequency inverter can run safely and stably.

实验结果表明，该中压变频器能够安全、稳定地运行。

2·A variable frequency inverter with a RS-485bus communication interface is designed. It has the advantages of simple hardware interface and high reliability of communication.

设计了一种带有RS - 485接口的交流变频控制器，它硬件接口简单，通讯可靠性高。

3·This paper introduces how to measure output of the inverter by simulating quantity of it, and the method for calculating the efficiency of variable-frequency motor.

本文介绍了如何通过变频器的模拟量输出来测量变频器的输出功率，进而计算出变频电动机效率的方法。

4·A kind of medium voltage AC variable frequency control system, which consists of voltage source inverter, sinuous filter and stepup transformer with variable frequency, is introduced.

介绍一种采用低压电压型变频器、正弦波滤波器和变频升压变压器构成的低-高式中压变频控制系统。

5·In the light of technical rebuilding engineering practice, the constitution of variable-frequency speed-regulation system and the structure features of inverter are described.

结合技改工程实例，对变频调速系统的构成和变频器的结构特点进行了论述。

6·This paper presents the methods of transfer function analysis and engineering design for variable frequency adjustable speed system of induction motor supplied by current source inverter.

本文提出了一种异步电动机电流型变频调速系统传递函数的分析及工程设计方法。

7·The AC-DCAC voltage source inverter composes the main circuit of this variable frequency system and CPLD is the logic control device of the power device (IPM).

该变频调速系统主电路采用交-直-交形式，以(CPLD)作为调速系统逆变电路功率开关器件(IPM)的逻辑控制器件。

8·This text is chiefly directed against the selection of variable frequency motor and inverter in the lathe numerical control rebuilding, and the lectotype of converter is analyzed.

本文主要针对车床数控化改造中变频电动机的选择、频器的选型进行分析。

9·The signal power supply that this thesis proposed is a frequency variable power source used in test field. This thesis concentrates on analysis and designing the nuclear part: Inverter.

本文的信号电源就是变频电源在测试领域的应用，本文就信号电源的核心逆变器部分做了详细的分析和设计。

10·Cascade multilevel inverter has extensive application in the high voltage variable frequency modulated Speed System for its numerous advantages.

级联式多电平逆变器因其具有众多的优点，在高压变频调速领域中得到广泛应用。