抽油机混合PWM变频调速节能技术的研究

Study on Technologies for Pumping Unit Hybrid PWM Variable Frequency Control and Energy Conservation

介绍三电平SVPWM技术和SHEPWM技术的原理,并结合SVPWM和SHEPWM的优点提出了混合PWM变频调速节能技术。在抽油机用三相异步电动机实验平台上进行了实验验证,结果表明:混合PWM变频调速节能技术可有效降低能耗,能在实现电动机平稳启动的同时提高转速的稳态精度。

The tri-level SVPWM and SHEPWM modulation technologies were introduced and considering their advantages, a hybrid PWM frequency control technology was proposed and verified on a test platform for three- phase asynchronous motor. The results show that, the hybrid PWM frequency control technology can reduce energy consumption effectively and enable motor start smoothly and enhance speed＇ s steady accuracy simulta- neously.