公开(公告)号：US20080304195A1

公开(公告)日：2008-12-11

申请号：US11806935

申请日：2007-06-05

Applicant: Kuo-Fan Lin

Inventor： Kuo-Fan Lin

IPC: H02H3/00

CPC classification number: H02M1/32 ,  H02M1/4225 ,  H02M2001/0032 ,  H02M2001/007 ,  Y02B70/126 ,  Y02B70/16

Abstract: A power abnormal protection circuit includes a power detection unit, a voltage drop correction unit, a drop out detection unit, a delay unit and a delay masking unit. By detecting an input power average value of a power supply occurring of a brown out condition can be determined. The power supply includes a power factor correction unit which has an output capacitor. By detecting the voltage of the output capacitor a drop out condition can be determined. When a power abnormal condition occurs all units of the power supply can be set off sequentially according to a delay time to protect circuit elements and a connecting computer.

Abstract translation: 功率异常保护电路包括功率检测单元，电压降校正单元，脱出检测单元，延迟单元和延迟掩蔽单元。 通过检测发生褐色条件的电源的输入功率平均值可以被确定。 电源包括具有输出电容器的功率因数校正单元。 通过检测输出电容器的电压，可以确定掉电条件。 当发生电源异常情况时，可以根据延迟时间顺序地关闭电源的所有单元，以保护电路元件和连接的计算机。

公开(公告)号：US20080170419A1

公开(公告)日：2008-07-17

申请号：US11653286

申请日：2007-01-16

Applicant: Kuo-Fan Lin

Inventor： Kuo-Fan Lin

IPC: H02M3/335 ,  H02M1/00

CPC classification number: H02M3/33592 ,  Y02B70/1475

Abstract: The present invention discloses an active peak voltage-limiting clamp circuit, which comprises a primary switch unit and a secondary switch unit that are used to control the coil current of a transformer, wherein a signal acquisition unit, a zero-point decision unit, a feedback unit and a pulse control unit are used to control the turn-on periods of the primary switch unit and the secondary switch unit; thus, the turn-on period of the primary switch unit is separated from the turn-on period of the secondary switch unit, and a buffer interval for the transient voltage variation is formed therebetween.

Abstract translation: 本发明公开了一种有源峰值限压钳位电路，其包括用于控制变压器的线圈电流的初级开关单元和次级开关单元，其中信号采集单元，零点判定单元， 反馈单元和脉冲控制单元用于控制主开关单元和次开关单元的接通时间; 因此，一次开关单元的导通周期与二次开关单元的导通周期分离，并且在它们之间形成用于瞬态电压变化的缓冲区间。

公开(公告)号：US07391626B1

公开(公告)日：2008-06-24

申请号：US11808411

申请日：2007-06-08

Applicant: Kuo-Fan Lin

Inventor： Kuo-Fan Lin

IPC: H02M3/22

CPC classification number: H02M3/33561

Abstract: A chop-wave control circuit includes a feedback unit, a ramp generation unit, a latchup unit and a voltage transformation unit that is used on a forward transformation circuit which includes at least a main output unit and at least one auxiliary output unit. The feedback unit captures a feedback signal from an output end of the auxiliary output unit to generate a slope regulation signal. The ramp generation unit alters the trigger time sequence of the latchup unit through the slope regulation signal to set an auxiliary flywheel switch ON or OFF. The voltage transformation unit detects potential variations of the latchup unit to set a chop-wave switch ON or OFF. By controlling the auxiliary flywheel switch and the chop-wave switch a power output cycle of the auxiliary output unit can be formed.

Abstract translation: 斩波控制电路包括反馈单元，斜坡发生单元，闭锁单元和电压变换单元，其用于至少包括主输出单元和至少一个辅助输出单元的正向变换电路。 反馈单元从辅助输出单元的输出端捕获反馈信号以产生斜率调节信号。 斜坡发生单元通过斜坡调节信号改变闭锁单元的触发时间顺序，以设置辅助飞轮开关的ON或OFF。 电压变换单元检测闭锁单元的电位变化以将斩波开关设定为ON或OFF。 通过控制辅助飞轮开关和斩波开关，可以形成辅助输出单元的功率输出周期。

公开(公告)号：US20080111602A1

公开(公告)日：2008-05-15

申请号：US11599290

申请日：2006-11-15

Applicant: Kuo-Fan Lin

Inventor： Kuo-Fan Lin

IPC: H03K3/017 ,  H03K3/00

CPC classification number: H03K7/08

Abstract: A cycle modulation circuit capable of limiting peak voltage to provide a pulse width control signal to a rear end power driving unit includes a comparison unit, an input voltage source and a linear voltage generation unit. The comparison unit compares an oscillation waveform signal generated by the linear voltage generation unit against a base value of a waveform signal level generated by the input voltage source to modulate and output the pulse width control signal of a combined cycle consisting of a high level and a low level. The pulse width control signal is input to the rear end power driving unit to limit the power driving unit in an equal restricted voltage peak value zone and determine the allowable duty cycle according to the level waveform signal.

Abstract translation: 能够限制峰值电压以向后端功率驱动单元提供脉冲宽度控制信号的周期调制电路包括比较单元，输入电压源和线性电压产生单元。 比较单元将由线性电压产生单元产生的振荡波形信号与由输入电压源产生的波形信号电平的基值进行比较，以调制和输出由高电平和 低级。 脉冲宽度控制信号被输入到后端电力驱动单元，以将功率驱动单元限制在相等的限制电压峰值区域，并根据电平波形信号确定允许占空比。

公开(公告)号：US20080031016A1

公开(公告)日：2008-02-07

申请号：US11498180

申请日：2006-08-03

Applicant: Kuo-Fan Lin

Inventor： Kuo-Fan Lin

IPC: H02M3/335

CPC classification number: H02M1/4225 ,  H02M1/34 ,  H02M2001/346 ,  Y02B70/126 ,  Y02B70/1491 ,  Y02P80/112

Abstract: A simple zero current switch circuit includes a first coil set and a second coil set that are wound at a selected coil ratio and bridge electrically an energy storing inductor, an output diode and a conduction switch of a power-factor corrector. The leaking inductance of the first coil set generates a back electromotive force to make the conduction switch in a zero current switching condition. An energy conversion circuit is provided to store reverse energy according to the coil ratio of the second coil set and the first coil set and reclaims the energy to an output capacitor of the power-factor corrector while the output diode generates a reverse recovery condition. Thereby reverse recovery time of the output diode can be shortened.

Abstract translation: 简单的零电流开关电路包括以选定的线圈比率卷绕的第一线圈组和第二线圈组，并将功率因数校正器的能量存储电感器，输出二极管和导通开关电桥连接。 第一线圈组的漏电感产生反电动势，使导通开关处于零电流开关状态。 提供能量转换电路，用于根据第二线圈组和第一线圈组的线圈比来存储反向能量，并且在输出二极管产生反向恢复条件时将功率回收到功率因数校正器的输出电容器。 从而可以缩短输出二极管的反向恢复时间。

公开(公告)号：US07310247B1

公开(公告)日：2007-12-18

申请号：US11605234

申请日：2006-11-29

Applicant: Kuo-Fan Lin ,  Chien-Li Tsai

Inventor： Kuo-Fan Lin ,  Chien-Li Tsai

IPC: H02M3/22 ,  H02M3/335

CPC classification number: H02M3/33592 ,  Y02B70/1475

Abstract: The present invention discloses a method for controlling transformer excitation cycles and a circuit for controlling the same, wherein the excitation cycle and the demagnetization cycle, which determine the rise and fall of the excitation current, are modified to prevent the coil from being saturated. In the present invention, a sense current is acquired from the excitation current of the transformer coil, and a demagnetization reference value is set. The sense current is used to determine whether the excitation current is lowered to the demagnetization reference value in the demagnetization cycle. A cycle modifying circuit is used to modify the duty cycle signal output by a pulse control unit until the excitation current is lowered to a preset level.

Abstract translation: 本发明公开了一种用于控制变压器励磁周期的方法和用于控制变压器励磁循环的电路，其中确定励磁电流的上升和下降的励磁周期和去磁循环被修改以防止线圈饱和。 在本发明中，从变压器线圈的励磁电流获取感测电流，设定退磁基准值。 感测电流用于确定在去磁循环中励磁电流是否降低到去磁参考值。 循环修改电路用于修改由脉冲控制单元输出的占空比信号，直到激励电流降低到预设电平。