本文介绍了LOGO！在空压机控制系统中的应用，给出了由一台自耦变压器控制两台空压机起动的控制电路。此法是一种经济，实用的控制方法，系统具有高可靠性，经实际应用，效果良好。关键词： LOGO！ 自耦变压器电动机 起动Abstract: This paper introduces the application of LOGO! in air compressor control system, and gives the control circuit of starting two air compressor with a self-coupling transformers. This control method is a economical and practical way. The control system has high reliability,.and works well in actual application.Keywords:LOGO!, self-coupling transformer, motor, start,