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1·The main function of variable frequency power source is to change the current AC power to the needed stable pure power.

变频电源的主要功用是将现有交流电网电源变换成所需频率的稳定的纯净的正选拨电源。

2·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。

3·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。

4·A new kind of linear trigger circuit made up of integrated circuit is described. The trigger circuit is used in rectification circuit under the condition of the variable frequency of power source.

叙述了一种新型的由集成电路构成的线性触发器，该触发器用于在电源频率可变条件下工作的整流电路。