公开(公告)号：US08274800B2

公开(公告)日：2012-09-25

申请号：US12647562

申请日：2009-12-28

申请人： Yoshiyuki Uno ,  Tomokuni Tokugawa ,  Tatsuya Hosotani

发明人： Yoshiyuki Uno ,  Tomokuni Tokugawa ,  Tatsuya Hosotani

IPC分类号： H02M3/335

CPC分类号： H02M1/4225 ,  H02M3/28 ,  H02M2001/0006 ,  H02M2001/008 ,  Y02B70/126

摘要： A digital signal processing circuit which performs average current control is disposed on a secondary side of a transformer of an isolated DC-DC converter, and a switching control signal output from the digital signal processing circuit is transmitted to a switching element included in a power factor correction converter through an isolated drive circuit. The digital signal processing circuit obtains an average value of currents supplied to an inductor in accordance with a voltage output from a bias winding of the inductor or an output from a secondary side of a current transformer which detects a drain current of the switching element. Furthermore, the average value of the currents corresponds to a waveform (full-wave rectification sine wave) of an input voltage Vi.

摘要翻译： 执行平均电流控制的数字信号处理电路设置在隔离DC-DC转换器的变压器的次级侧，并且从数字信号处理电路输出的开关控制信号被发送到功率因数中包括的开关元件 校正转换器通过隔离驱动电路。 数字信号处理电路根据从电感器的偏置绕组输出的电压或检测开关元件的漏极电流的电流互感器的次级侧的输出，获得提供给电感器的电流的平均值。 此外，电流的平均值对应于输入电压Vi的波形（全波整流正弦波）。

公开(公告)号：US07919950B2

公开(公告)日：2011-04-05

申请号：US12652103

申请日：2010-01-05

申请人： Yoshiyuki Uno ,  Tomokuni Tokugawa ,  Tatsuya Hosotani

发明人： Yoshiyuki Uno ,  Tomokuni Tokugawa ,  Tatsuya Hosotani

IPC分类号： G05F1/70

CPC分类号： H02M1/4225 ,  H02M1/44 ,  H02M3/157 ,  Y02B70/126

摘要： A power factor correction converter includes a diode bridge arranged to perform full-wave rectification on an AC input power supply, a switching element arranged to perform switching on an output voltage thereof, an inductor arranged to pass a current interrupted by the switching element and to accumulate and emit excitation energy, a diode, and a smoothing capacitor defining a step-up chopper circuit. A digital signal processing circuit detects a phase of an input voltage, and a switching frequency of the switching element is modulated in accordance with the phase. Accordingly, the switching frequency can be appropriately modulated without depending on an input voltage, so that a wide range of input voltages can be accepted while suppressing EMI noise with a peak generated in the switching frequency and higher-order frequency components thereof.

摘要翻译： 功率因数校正转换器包括：二极管电桥，被配置为在AC输入电源上执行全波整流;开关元件，被布置成对其输出电压进行开关;电感器，被布置成使由开关元件中断的电流通过， 累积并发射激发能量，二极管和限定升压斩波电路的平滑电容器。 数字信号处理电路检测输入电压的相位，并根据该相位调制开关元件的开关频率。 因此，可以适当地调制开关频率而不依赖于输入电压，从而可以在以开关频率及其高阶频率分量产生的峰值抑制EMI噪声的同时接受宽范围的输入电压。