大功率直接变频电路的基本功能是实现频率和电压的直接变换，被应用于航空电源和调速电源中。
The large power AC-AC frequency-changers are used in the aircraft power source and AC speed-regulation systems to convert frequency and voltage directly.
利用小波变换对电机的信号进行了处理，得出了变频供电下电机电流的谐波特性以及变频器供电电机的噪声随变频器开关频率的变化特性。
Signal processing of motor was conducted by Wavelet Transform. The current harmonics characteristics and noise changes with switching frequency of the motor fed by Inverter were listed.
然后采用正交数字上变频（DUC）技术进行基带信号数字域调制和频率变换。
Then, a solution based on Digital Up Converter(DUC) was proposed, which implemented the conversion of a complex digital baseband signal to a real passband signal.
应用推荐