公开(公告)号：US07791903B2

公开(公告)日：2010-09-07

申请号：US11561937

申请日：2006-11-21

申请人： Congfeng Zhang ,  Hao Zhang ,  Guichao Hua

发明人： Congfeng Zhang ,  Hao Zhang ,  Guichao Hua

IPC分类号： H02M3/335

CPC分类号： H02M3/33592 ,  Y02B70/1475

摘要： A DC-DC flyback converter, includes a three-winding transformer; a primary power circuit having a first MOSFET connected to a first winding of the transformer; a secondary power circuit connected to a second winding of the transformer terminals; and a self-driven circuit connected to a third winding of the transformer. The secondary power circuit includes a synchronous rectifier in the form of a second MOSFET and the self-driven circuit further includes a delay drive circuit, an isolation differential circuit, a negative removal circuit having a third MOSFET and a synchronous rectifier trigger switch-off circuit for switching the synchronous rectifier to an off condition.

摘要翻译： DC-DC反激式转换器，包括三绕组变压器; 主电源电路，其具有连接到变压器的第一绕组的第一MOSFET; 连接到变压器端子的第二绕组的次级电源电路; 以及连接到变压器的第三绕组的自驱动电路。 次级电源电路包括第二MOSFET形式的同步整流器，并且自驱动电路还包括延迟驱动电路，隔离差分电路，具有第三MOSFET的同步整流器和同步整流器触发关断电路 用于将同步整流器切换到关闭状态。

公开(公告)号：US20100182117A1

公开(公告)日：2010-07-22

申请号：US12686657

申请日：2010-01-13

申请人： Xinke Wu ,  Guichao Hua ,  Xun Huang

发明人： Xinke Wu ,  Guichao Hua ,  Xun Huang

IPC分类号： H01F27/29

CPC分类号： H01F38/30 ,  H01F3/12 ,  H01F27/2866

摘要： A pulse current transducer including at least one open core, an armature, together with the at least one open core form a closed magnetic circuit, a winding wound around the at least one open core, at least one signal output pin connected to the at least one open core, and a conducting strip between the armature and the at least one open core.

摘要翻译： 脉冲电流传感器，包括至少一个开放磁芯，电枢以及至少一个开放磁芯形成闭合磁路，围绕所述至少一个开放磁芯缠绕的绕组，至少一个连接到所述至少一个开放磁芯的信号输出引脚 一个开芯，以及在所述电枢和所述至少一个开芯之间的导电条。

公开(公告)号：US20090262560A1

公开(公告)日：2009-10-22

申请号：US12397909

申请日：2009-03-04

申请人： Guichao Hua ,  Wu Xinke ,  Luo Changchun

发明人： Guichao Hua ,  Wu Xinke ,  Luo Changchun

IPC分类号： H02M3/337

CPC分类号： H02M3/33592 ,  Y02B70/1433 ,  Y02B70/1475

摘要： A current controlled synchronous rectifying drive circuit including a current transducer ST having a primary winding connected in series with a synchronous rectifier SR and having a secondary winding to detect a current signal of a synchronous rectifier SR, a signal shaping and reset circuit connected to the secondary winding of the current transducer ST to convert the synchronous rectifier SR's current signal into a voltage signal and shapes it into a pulse signal, a push-pull power amplifying circuit having an input end connected to the signal shaping and reset circuit and an output end connected to a gate of the synchronous rectifier SR to amplify a drive signal generated by the signal shaping and reset circuit to drive the synchronous rectifier SR, and a drive self-bias drive circuit having an input end connected to the secondary winding of the current transducer ST and an output end connected to the push-pull power amplifying circuit to store energy from the current transducer ST to generate a voltage source.

摘要翻译： 一种电流控制同步整流驱动电路，包括具有与同步整流器SR串联连接的初级绕组的电流传感器ST，并具有用于检测同步整流器SR的电流信号的次级绕组，连接到次级绕组的信号整形和复位电路 绕组电流传感器ST以将同步整流器SR的电流信号转换成电压信号并将其变形为脉冲信号，具有连接到信号整形和复位电路的输入端的推挽功率放大电路和连接到信号整形和复位电路的输出端 到同步整流器SR的门，以放大由信号整形和复位电路产生的驱动信号以驱动同步整流器SR;以及驱动自偏置驱动电路，其输入端连接到电流变换器ST的次级绕组 以及连接到推挽功率放大电路以输出来自电流换能器ST的能量的输出端 以产生电压源。

公开(公告)号：US06583993B2

公开(公告)日：2003-06-24

申请号：US09932398

申请日：2001-08-17

申请人： Guichao Hua

发明人： Guichao Hua

IPC分类号： H02M3335

CPC分类号： H02M3/33592 ,  Y02B70/1475

摘要： A self-driven synchronous rectification circuit which includes two power switches S1 and S2; a transformer Tr having a primary winding with Np number of turns, a secondary winding with Ns number of turns and an auxiliary winding with Na number of turns; two secondary synchronous rectifiers S3 and S4; two diodes D1 and D2; and two zener diodes ZD1 and ZD2. The number of auxiliary winding turns Na of the transformer Tr ensure that the synchronous rectifiers S3 and S4 are supplied with an adequate gate-drive voltage. When S3 conducts, the gate-drive voltage of S4 is clamped by D1. Likewise, when S4 conducts, the gate-drive voltage of S3 is clamped by D2. ZD1 and ZD2 operate to restrain the gate overvoltage of S3 and S4, respectively. With this design, the self-driven synchronous rectifier circuit operates normally at various output voltages, such as low output voltages of 3.3V or lower and/or high output voltages above 6V.

摘要翻译： 一种自驱动同步整流电路，包括两个电源开关S1和S2; 具有N匝数的初级绕组的变压器Tr，具有N匝数的次级绕组和具有Na匝数的辅助绕组; 两个二次同步整流器S3和S4; 两个二极管D1和D2; 和两个齐纳二极管ZD1和ZD2。 变压器Tr的辅助绕组匝数确保同步整流器S3和S4被提供足够的栅极驱动电压。 当S3导通时，S4的栅极驱动电压被D1钳位。 同样地，当S4导通时，S3的栅极驱动电压被D2钳位。 ZD1和ZD2分别用于限制S3和S4的栅极过电压。 通过这种设计，自驱动同步整流电路在各种输出电压下正常工作，例如3.3V或更低的输出电压和/或6V以上的高输出电压。

公开(公告)号：US09380678B2

公开(公告)日：2016-06-28

申请号：US14008438

申请日：2011-08-29

申请人： Delai Jiang ,  Jianhua Zou ,  Guichao Hua

发明人： Delai Jiang ,  Jianhua Zou ,  Guichao Hua

IPC分类号： H05B37/00 ,  H05B39/00 ,  H05B41/14 ,  H05B37/02 ,  H02M1/08 ,  H02M5/293 ,  H05B39/04 ,  H02M1/00

CPC分类号： H05B37/02 ,  H02M1/081 ,  H02M5/293 ,  H02M2001/0006 ,  H05B39/04

摘要： An auxiliary power supply circuit of a two wire dimmer, comprising: an auxiliary source capacitor (20) and a cutoff switch (30) constituting a series branch, a chopper switch (10) parallel-connected to the series branch, and a control device (40) connected to the chopper switch (10) and to the cutoff switch (30). The control device (40) measures an auxiliary source voltage and receives a chopper voltage control signal (Vg), and outputs signals (V1 and V2), on the basis of the result of a comparison between the auxiliary source voltage and a preset voltage and of the state of the chopper voltage control signal (Vg), to control the on and off of the chopper switch (10) and of the cutoff switch (30) for controlling the charging of the auxiliary source capacitor (20). The auxiliary power supply circuit has low losses, high efficiency, and is not limited by minimum chopper angle, and has low electromagnetic interference.

摘要翻译： 一种双线调光器的辅助电源电路，包括：辅助源电容器（20）和构成串联分支的截止开关（30），与串联分支并联的斩波开关（10），以及控制装置 （40）连接到斩波开关（10）和断开开关（30）。 控制装置（40）根据辅助电源电压和预设电压之间的比较结果，测量辅助电源电压并接收斩波电压控制信号（Vg），并输出信号（V1和V2），以及 的斩波电压控制信号（Vg）的状态，以控制用于控制辅助源电容器（20）的充电的斩波开关（10）和截止开关（30）的导通和截止。 辅助电源电路损耗低，效率高，不受最小切割角度的限制，电磁干扰低。

公开(公告)号：US09215767B2

公开(公告)日：2015-12-15

申请号：US13994280

申请日：2011-08-23

申请人： Guichao Hua ,  Liang'an Ge ,  Hangdong Yu

发明人： Guichao Hua ,  Liang'an Ge ,  Hangdong Yu

IPC分类号： H05B37/02 ,  H05B33/08

CPC分类号： H05B33/0815 ,  H05B33/0827 ,  Y10T307/406

摘要： A device and system for load driving. The device includes: an electric energy supplying unit including at least two units with output voltage adjustable; a sampling unit, with the input thereof connected to either end of a load unit for sampling the current of that end and sending the sampled current to an output voltage controller; the output voltage controller, with the input thereof connected to the output of the sampling unit for outputting voltage control signal to each unit with output voltage adjustable, according to the sampled current, so as to control the difference between the output voltage of each unit with output voltage adjustable and the maximum load voltage in a load branch to be not greater than a preset difference threshold, with the difference threshold being greater than or equal to zero. The device and system for load driving can improve the reliability of the driving device and can reduce the complexity of the circuit.

摘要翻译： 一种用于负载驱动的装置和系统。 该装置包括：电能供给单元，其包括至少两个具有输出电压可调节的单元; 采样单元，其输入连接到负载单元的任一端，用于对该端的电流进行采样，并将采样的电流发送到输出电压控制器; 输出电压控制器，其输入端连接到采样单元的输出端，用于根据采样电流向每个单元输出电压控制信号，输出电压可调，以便控制每个单元的输出电压与 输出电压可调，并且负载分支中的最大负载电压不大于预设差值阈值，差值阈值大于或等于零。 用于负载驱动的装置和系统可以提高驱动装置的可靠性，并且可以降低电路的复杂性。

公开(公告)号：US20130099686A1

公开(公告)日：2013-04-25

申请号：US13806507

申请日：2010-11-09

申请人： Liang'an Ge ,  Guichao Hua

发明人： Liang'an Ge ,  Guichao Hua

IPC分类号： H05B37/02

CPC分类号： H05B37/02 ,  H05B33/0812 ,  H05B33/0815 ,  H05B33/0818 ,  H05B33/0827

摘要： A Light emitting diode (LED) dimming system comprises a voltage regulating converter, an input of which is connected to a power supply; a constant current module, an output of which is connected to an LED load constituted by one LED light or multiple serial LED lights; the output of the voltage regulating converter is connected with the input of the constant current module via a switch, and the switch is controlled to be on-off by an adjustable pulse signal. The invention has the advantages of high power factor and low electromagnetic interference, and easy implementation, etc.

摘要翻译： 发光二极管（LED）调光系统包括电压调节转换器，其输入端连接到电源; 恒流模块，其输出端连接到由一个LED灯或多个串联LED灯构成的LED负载; 电压调节转换器的输出通过开关与恒流模块的输入端连接，开关通过可调脉冲信号控制为开 - 关。 本发明具有功率因数高，电磁干扰低，易于实现等优点。

公开(公告)号：US20100309701A1

公开(公告)日：2010-12-09

申请号：US12796662

申请日：2010-06-08

申请人： Xinke Wu ,  Delai Jiang ,  Xiaojun Guo ,  Guichao Hua

发明人： Xinke Wu ,  Delai Jiang ,  Xiaojun Guo ,  Guichao Hua

IPC分类号： H02M7/217

CPC分类号： H02M3/33592 ,  H02M7/103 ,  Y02B70/1475

摘要： A current-driven synchronous rectifying drive circuit designed for a T-type voltage doubler rectifier with an energy feedback circuit including a clamp and energy feedback circuit, a high frequency transformer, a current transducer, an energy storage capacitor, an output capacitor, a first and a second synchronous rectifier, and a first drive circuit connected to the first synchronous rectifier and a second drive circuit connected to the second synchronous rectifier.

摘要翻译： 一种用于具有能量反馈电路的T型倍压整流器的电流驱动同步整流驱动电路，包括钳位和能量反馈电路，高频变压器，电流传感器，储能电容器，输出电容器，第一 和第二同步整流器，以及连接到第一同步整流器的第一驱动电路和连接到第二同步整流器的第二驱动电路。

公开(公告)号：US20070121351A1

公开(公告)日：2007-05-31

申请号：US11561937

申请日：2006-11-21

申请人： Congfeng Zhang ,  Hao Zhang ,  Guichao Hua

发明人： Congfeng Zhang ,  Hao Zhang ,  Guichao Hua

IPC分类号： H02M3/335

CPC分类号： H02M3/33592 ,  Y02B70/1475

摘要： A DC-DC flyback converter, includes a three-winding transformer; a primary power circuit having a first MOSFET connected to a first winding of the transformer; a secondary power circuit connected to a second winding of the transformer terminals; and a self-driven circuit connected to a third winding of the transformer. The secondary power circuit includes a synchronous rectifier in the form of a second MOSFET and the self-driven circuit further includes a delay drive circuit, an isolation differential circuit, a negative removal circuit having a third MOSFET and a synchronous rectifier trigger switch-off circuit for switching the synchronous rectifier to an off condition.

摘要翻译： DC-DC反激式转换器，包括三绕组变压器; 主电源电路，其具有连接到变压器的第一绕组的第一MOSFET; 连接到变压器端子的第二绕组的次级电源电路; 以及连接到变压器的第三绕组的自驱动电路。 次级电源电路包括第二MOSFET形式的同步整流器，并且自驱动电路还包括延迟驱动电路，隔离差分电路，具有第三MOSFET的同步整流器触发关断电路 用于将同步整流器切换到关闭状态。

公开(公告)号：US6005780A

公开(公告)日：1999-12-21

申请号：US921171

申请日：1997-08-29

申请人： Guichao Hua

发明人： Guichao Hua

IPC分类号： H02M1/00 ,  H02M1/42 ,  H02M3/335

CPC分类号： H02M1/4258 ,  Y02B70/126 ,  Y02P80/112

摘要： Improved AC/DC conversion in power supplies having an isolation transformer located between rectified-AC input and DC output leads. The transformer is given a primary winding having one or more taps, and a positive input lead is connected thereto by a corresponding number of intermediate leads, each containing selected components. The improvement not only enables power factor correction (PFC) but also desired adjustment of or control over other operational variables, such as bulk capacitor voltage stress, output regulation, and overall efficiency, often at a reduction in circuit complexity and cost.

摘要翻译： 改进的交流/直流转换电源具有隔离变压器位于整流交流输入和直流输出引线之间。 变压器被给予具有一个或多个抽头的初级绕组，并且正输入引线通过相应数量的中间引线连接，每个中间引线包含选定的部件。 该改进不仅能够实现功率因数校正（PFC），而且还可以期望调整或控制其他操作变量，例如大容量电容器电压应力，输出调节和总体效率，通常降低电路复杂性和成本。