空间矢量SVPWM控制算法在变频空调设计中的应用

Application of SVPWM Control Method Based on Space Vector in Inverter Air-Conditioner Designing

为进一步减少噪音,提高电压利用率,采用空间电压矢量SVPWM技术进行变频空调设计。以三相对称正弦波电压供电时交流电动机的理想磁通为基准,用逆变器不同的开关模式所产生的实际磁通去逼近基准圆磁通,由它们比较的结果决定逆变器的开、关,形成PWM波形。并把逆变器和电机看成一个整体来处理,具有模型简单、转矩脉动小、噪音低、电压利用率高等优点。理论分析及实验结果表明,该方法完全能够满足变频空调的设计要求。

To further reduce the noise,raises the efficiency of voltage,the voltage space vector SVPWM technology be adopted to design inverter air-conditioner.By the basic standard of motor＇s ideal magnetic flux with three-phase symmetrical sine wave voltage power supply is considered,use the actual magnetic flux with the inverter different switch pattern to approach the base director circle magnetic flux,compares the results to decide which time the inverter＇s switches open and pass,forms the PWM waveforms.And regards the inverter and the electrical motor as a whole to process,It has the merit of model to be simple,the torque pulsation be small,the noise be low,voltage use factor higher and so on.The theoretical analysis and the experimental result indicated that this method can definitely satisfy the inverter air-conditioner designing requirements.