摘要
介绍了转子变频的主电路和工作原理,并指出其优点。引入了PWM整流技术,使得串级调速系统的功率因数得到提高,谐波含量也大大减少。对转子变频进行了数学建模,并采用状态空间平均法得到了斩波器的传递函数;通过坐标变换,得到了PWM整流器在旋转坐标系的数学模型,给出了相应的控制策略和仿真,并给出了实验波形及相关结论。
The main circuit and principle of rotor-side variable frequency drive system is proposed firstly. At the same time, its advantage is given. Because the PWM converter technique is adopt, the power factor is increased and the harmonic is little. The mathematical model and control strategy in rotary coordinate is gained. Finally, the experiment and conclusion are given.
出处
《电机与控制应用》
北大核心
2006年第6期51-55,共5页
Electric machines & control application
关键词
转子变频
斩波
PWM整流
功率因数
rotor-side variable frequency
chopper
PWM converter
power factor
