专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US06388905B2 Single phase AC-DC converter having a power factor control function 失效
公开(公告)号：US06388905B2
公开(公告)日：2002-05-14
申请号：US09898371
申请日：2001-07-03
申请人： Shin Nakagawa
发明人： Shin Nakagawa
IPC分类号： H02M3355
CPC分类号： H02M1/4208 , H02M1/4225 , Y02B70/126
摘要： The single-phase AC-DC converter includes a PFC power supply section, where a rectified current obtained by rectifying an electric current from an AC supply is switched; a DC-DC power supply section, where a direct current obtained by rectifying and smoothing an electric current from an AC supply is switched; a first switching element for conducting a switching operation in the PFC power supply section; a second switching element for conducting a switching operation in the DC-DC power supply section; a drive pulse generating circuit for generating first drive pulses for driving said first switching element and second drive pulses for driving said second switching element; and a servo loop for controlling the drive pulse generating circuit. The servo loop is constituted of only one serve loop; and the duty ratio of the drive pulses for driving the first switching element is different from the duty ratio of the drive pulses for driving the second switching element from each other in a linked manner.

2. 发明授权

US06580624B2 Switching power circuit with a filter for controlling noise of a switching frequency and method of same 失效
标题翻译：开关电源电路采用滤波器控制开关频率的噪声及其方法
公开(公告)号：US06580624B2
公开(公告)日：2003-06-17
申请号：US09805140
申请日：2001-03-14
申请人： Satoshi Arai
发明人： Satoshi Arai
IPC分类号： H02M3355
CPC分类号： H02M3/33538
摘要： An AC power is rectified in a rectification circuit, and a pulsating voltage is output via a noise filter. The pulsating voltage is input to a switching circuit, and an AC voltage having a pulse width corresponding to a control signal is output. The AC voltage is transformed and rectified. The pulsating voltage is smoothed in a smoothing condenser, and a DC voltage is output. A voltage change detecting circuit detects a change of the DC voltage in a period longer than a period of ripple included in the DC voltage, and a detection signal is output. The detection signal is input to a control circuit, and a negative feed-back control is executed so that the DC voltage becomes constant.
摘要翻译：在整流电路中整流交流电，通过噪声滤波器输出脉动电压。脉冲电压被输入到开关电路，并且输出具有对应于控制信号的脉冲宽度的交流电压。交流电压被变换和整流。在平滑电容器中平滑脉动电压，并输出直流电压。电压变化检测电路在比直流电压中包含的纹波的周期更长的时间内检测直流电压的变化，并输出检测信号。检测信号被输入到控制电路，执行负反馈控制使得直流电压变为恒定。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式