主要介绍以可编程门阵列器件构成恒流源核心控制电路的设计思路，通过机电自控装置驱动可调变压器实现新的稳流方法，实验证明这一方法是可行的。
A design method of using GAL to make a constant current source is introduced, proving a new method of current stabilization by means of driving regulated transformer by a controlling device.
提出了基于西门子S7-200PLC的变压器干燥系统的电气设计方案，介绍了部分控制电路及控制程序设计。
This paper presents the electrical design solution for the transformer dry system based on SIMATIC S7-200 PLC, and introduces partly design of control circuits and control programs.
提出了基于西门子S7-200PLC的变压器干燥系统的电气设计方案，介绍了部分控制电路及控制程序设计。
This paper presents the electrical design solution for the transformer dry system based on SIMATIC S7-200 PLC, and introduces partly design of control circuits and control programs.
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