功率VMOS管驅動的直流電機無級調速系統

摘要：傳統的直流電機調速大多采用電阻壓降、雙極性管和晶閘管驅動的方法，但是效率較低，不夠穩定。本文介紹了由開關電源供電、大功率VMOS管驅動、脈寬調制的直流電機無級調速系統的設計，分析了系統的工作原理，實現了無觸點、高效率、穩定的正反轉調速。 敘詞：脈寬調制(PWM) 數字電路 無觸點正反轉 Abstract：Most of todays traditional DC-motor speed regulation systems are driven by resistance, bipolar and thyratron, which have deficiency in stability and efficiency. To solve these problems, this article have introduced a design of the DC-motor speed regulation system for the conveyor line powered by Multi-Output switching power, driven by power field effect transistor (VMOS) and controlled by PWM driver program which would realize the non-contact positive and negative rotation control. Having analysed the principle of this system, we have implement the non-contact positive and negative rotation control stably and efficiently. Keyword：PWM, Digital circuit, Non-contact positive and negative rotation.