公开(公告)号：US06674658B2

公开(公告)日：2004-01-06

申请号：US10062639

申请日：2002-02-01

申请人： Hengchun Mao ,  Yimin Jiang

发明人： Hengchun Mao ,  Yimin Jiang

IPC分类号： H02M3335

CPC分类号： H02M3/33592 ,  Y02B70/1475

摘要： A power converter device using synchronous rectifiers and method for controlling operation thereof are provided. A first synchronous rectifier is coupled to the secondary transformer winding to pass a voltage induced at the secondary winding in response to an input voltage supplied to the primary transformer winding during an on-state of a main power switch. A first drive circuit is coupled to the gate terminal of the first synchronous rectifier to selectively activate and deactivate the first rectifier in correspondence with the respective on and off states of the main power switch based on a gate voltage supplied by the first drive circuit, with at least one circuit parameter being selected in the first drive circuit for maintaining the gate voltage within a predefined range regardless of variation in the level of the input voltage.

摘要翻译： 提供了一种使用同步整流器的电力转换装置及其控制方法。 第一同步整流器耦合到次级变压器绕组，以响应于在主电源开关的导通状态期间提供给初级变压器绕组的输入电压，传递在次级绕组处感应的电压。 第一驱动电路耦合到第一同步整流器的栅极端子，以基于由第一驱动电路提供的栅极电压与主电源开关的各自的导通和关断状态对应地选择性地激活和去激活第一整流器， 在第一驱动电路中选择至少一个电路参数，用于将栅极电压维持在预定范围内，而与输入电压电平的变化无关。

公开(公告)号：US06574124B2

公开(公告)日：2003-06-03

申请号：US10242558

申请日：2002-09-11

申请人： Feng Lin ,  Ning Sun ,  Hengchun Mao ,  Yimin Jiang

发明人： Feng Lin ,  Ning Sun ,  Hengchun Mao ,  Yimin Jiang

IPC分类号： H02M3335

CPC分类号： H02M3/1584 ,  H02M1/32 ,  H02M3/285 ,  H02M3/33569 ,  H02M3/33592 ,  Y02B70/1475

摘要： A power distribution system is provided including current sharing circuitry, current sensing and over-current protection. The system includes a plurality of power converter modules each having a current sharing signal terminal on an input side and power output terminals on an output side, the corresponding power output terminals of the several modules being connected together and adapted to power a common load; an interconnecting signal bus coupled across the current sharing signal terminals on the input side; a plurality of feedback circuits, each of which is associated with one of said modules, each feedback circuit including a comparator (error amplifier) for comparing a feedback voltage on the output side with a reference voltage to provide an error signal to the input side; the error signal conditioned to provide a current command signal to said signal bus, wherein the signal bus provides a common current command signal to drive the power converter modules.

摘要翻译： 提供了配电系统，包括电流共享电路，电流检测和过电流保护。 该系统包括多个功率转换器模块，每个功率转换器模块在输入侧具有电流共享信号端子和输出侧的功率输出端子，多个模块的相应功率输出端子连接在一起并适于为公共负载供电; 耦合在输入侧的电流共享信号端子上的互连信号总线; 多个反馈电路，每个反馈电路与所述模块中的一个相关联，每个反馈电路包括用于将输出侧的反馈电压与参考电压进行比较的比较器（误差放大器），以向输入侧提供误差信号; 所述误差信号被调节以向所述信号总线提供电流指令信号，其中所述信号总线提供公共电流指令信号以驱动所述功率转换器模块。

公开(公告)号：US06300818B1

公开(公告)日：2001-10-09

申请号：US09640352

申请日：2000-08-16

申请人： Hengchun Mao

发明人： Hengchun Mao

IPC分类号： H03K1778

CPC分类号： H02M3/156 ,  Y10S323/907

摘要： For use with a semiconductor switch that exhibits a temperature-dependent electrical characteristic and a current sense circuit that employs the characteristic of the switch to derive a switch current signal, a temperature compensation circuit, method of operation thereof and controller employing the same. In one embodiment, the circuit includes: (1) an electrical component, locatable in thermal communication with the switch and having a temperature-dependent electrical characteristic that bears an inverse relationship to the characteristic of the switch, that generates an intermediate signal based on an actual temperature of the switch and (2) a signal conditioning circuit, coupled to the electrical component, that scales the intermediate signal to yield a compensation signal that counteracts temperature-dependent variations in the switch current signal.

摘要翻译： 用于与温度相关的电气特性的半导体开关和采用开关特性导出开关电流信号的电流检测电路，温度补偿电路，其操作方法和采用该开关电流信号的控制器。 在一个实施例中，电路包括：（1）电气部件，其可定位成与开关热连通，并且具有与开关特性成反比关系的与温度相关的电特性，该特性产生基于 开关的实际温度和（2）耦合到电气部件的信号调节电路，其缩放中间信号以产生抵消开关电流信号中温度相关变化的补偿信号。

公开(公告)号：US06191564B1

公开(公告)日：2001-02-20

申请号：US09449047

申请日：1999-11-24

申请人： Hengchun Mao

发明人： Hengchun Mao

IPC分类号： G05F110

CPC分类号： H02M1/4225 ,  Y02B70/126 ,  Y02P80/112

摘要： A power factor correcting eletrical converter apparatus receives an alternating electrical input signal from a power source. The apparatus preferably includes an input tracking circuit connected with the power source for tracking the input signal and providing the input signal at an input tracking node. The converter apparatus includes a rectifying circuit connected with the power source for receiving the input signal and generating a rectified input signal, and a filtering circuit connected with the rectifying circuit to filter and smooth the rectified input signal. An input sensing circuit is connected with the input tracking circuit for receiving the input signal and generating an input-indicating signal at an input-sensing node. An output circuit is connected with the filtering circuit for delivering the rectified boost signal to a load. The output circuit senses an electrical parameter associated with the load to produce an output-indicating signal at an output-sensing node. A feedback circuit is connected with the input-sensing node and with the output-sensing node for receiving the input-indicating signal and the output-indicating signal and generating a gating signal. The output circuit responds to the gating signal to switchingly control connection with the load. The input sensing circuit or the feedback circuit may be configured to impose a delay which causes the input-indicating signal to be out of phase with the input signal. The phase shift reduces input current distortion and increases input power factor.

摘要翻译： 功率因数校正电路转换器装置从电源接收交流电输入信号。 该装置优选地包括与电源连接的输入跟踪电路，用于跟踪输入信号并在输入跟踪节点处提供输入信号。 转换器装置包括与电源连接的整流电路，用于接收输入信号并产生整流输入信号，以及与整流电路连接的滤波电路，对整流输入信号进行滤波和平滑处理。 输入检测电路与输入跟踪电路连接，用于接收输入信号并在输入感测节点处产生输入指示信号。 输出电路与滤波电路连接，用于将整流的升压信号传送到负载。 输出电路感测与负载相关联的电参数以在输出感测节点处产生输出指示信号。 反馈电路与输入感测节点和输出感测节点连接，用于接收输入指示信号和输出指示信号并产生选通信号。 输出电路响应门控信号，以切换控制与负载的连接。 输入感测电路或反馈电路可以被配置为施加使输入指示信号与输入信号异相的延迟。 相移可以降低输入电流失真并增加输入功率因数。

公开(公告)号：US6034513A

公开(公告)日：2000-03-07

申请号：US832429

申请日：1997-04-02

申请人： Richard William Farrington ,  Mark Elliott Jacobs ,  Hengchun Mao

发明人： Richard William Farrington ,  Mark Elliott Jacobs ,  Hengchun Mao

IPC分类号： H02M1/00 ,  H02M1/42 ,  G05F1/70 ,  G05F1/614

CPC分类号： H02M1/4225 ,  Y02B70/126

摘要： A power factor controller, a method of controlling power factor and a power converter employing either the controller or the method. The controller includes: (1) a ramp circuit that senses an output voltage of a converter being controlled and generates an intermediate waveform that rises as a function of a magnitude of the output voltage and (2) a drive circuit, coupled to the ramp circuit, that senses a current in the converter and causes the intermediate waveform to fall at a time that is a function of a magnitude of the current, the drive circuit generating a drive signal for the converter from the intermediate waveform.

摘要翻译： 功率因数控制器，功率因数控制方法以及使用控制器或方法的功率转换器。 控制器包括：（1）斜坡电路，其检测被控制的转换器的输出电压，并产生作为输出电压的大小的函数上升的中间波形;以及（2）耦合到斜坡电路的驱动电路 ，其感测转换器中的电流，并且使得中间波形在与电流大小的函数的时间下降，驱动电路从中间波形产生用于转换器的驱动信号。

公开(公告)号：US5933336A

公开(公告)日：1999-08-03

申请号：US118549

申请日：1998-07-17

申请人： Yimin Jiang ,  Hengchun Mao

发明人： Yimin Jiang ,  Hengchun Mao

IPC分类号： H02M1/00 ,  H02M1/42 ,  H02M3/158 ,  H02M1/12

CPC分类号： H02M1/4216 ,  H02M3/158 ,  Y02B70/126 ,  Y02B70/1425

摘要： A boost converter having multiple L-C branches and a method of operating the same. The boost converter includes first, second and third phase inputs and an output. In one embodiment, the boost converter includes first and second switches coupled between corresponding rails of the output. The boost converter also includes first, second and third capacitors that form first, second and third L-C series branches, respectively, with a first inductor. The first, second and third L-C series branches are coupled between the first, second and third phase inputs, respectively, and a node between the first and second switches. The first and second switches cooperate progressively to employ a voltage across the rails less a voltage across the first, second and third capacitors to discharge currents through the first inductor and thereby reduce input current total harmonic distortion (THD) on all three of the phase inputs.

摘要翻译： 具有多个L-C分支的升压转换器及其操作方法。 升压转换器包括第一，第二和第三相输入端和输出端。 在一个实施例中，升压转换器包括耦合在输出的相应导轨之间的第一和第二开关。 升压转换器还包括分别与第一电感器形成第一，第二和第三L-C串联支路的第一，第二和第三电容器。 第一，第二和第三L-C系列分支分别耦合在第一，第二和第三相输入之间，以及第一和第二开关之间的节点。 第一和第二开关逐渐协调以跨越轨道使电压减去第一，第二和第三电容器两端的电压，以放电通过第一电感器的电流，从而降低所有三相相位输入端的输入电流总谐波失真（THD） 。

公开(公告)号：US5923547A

公开(公告)日：1999-07-13

申请号：US12131

申请日：1998-01-22

申请人： Hengchun Mao

发明人： Hengchun Mao

IPC分类号： H02M1/34 ,  H02M3/337 ,  H02M7/125

CPC分类号： H02M1/34 ,  H02M3/337 ,  H02M2001/342 ,  Y02B70/1491

摘要： For use with a power converter having a switching circuit coupled to a primary winding of a transformer and a rectifier coupled to a secondary winding of the transformer, the switching circuit exhibiting switching losses and the rectifier inducing reverse recovery currents in the converter, a snubber circuit and a method of reducing the switching losses and reverse recovery currents. In one embodiment, the snubber circuit includes (1) a clamping capacitor coupled to the secondary winding, (2) a first clamping diode coupled to the rectifier that diverts the reverse recovery currents to the clamping capacitor and (3) an auxiliary switch that creates a path to discharge leakage inductance in the transformer to facilitate substantially zero current turn-off of the switching circuit and recover the energy stored in the clamping capacitor to an output of the converter, the auxiliary switch, clamping diode and clamping capacitor cooperating to reduce the switching losses and reverse recovery currents in the converter.

摘要翻译： 为了与具有耦合到变压器的初级绕组的开关电路和耦合到变压器的次级绕组的整流器的功率转换器一起使用，开关电路表现出开关损耗并且整流器引入转换器中的反向恢复电流，缓冲电路 以及减少开关损耗和反向恢复电流的方法。 在一个实施例中，缓冲电路包括（1）耦合到次级绕组的钳位电容器，（2）耦合到整流器的第一钳位二极管，其将反向恢复电流转移到钳位电容器，以及（3）辅助开关，其产生 在变压器中放电泄漏电感的路径，以促进开关电路的基本零电流关断，并将存储在钳位电容器中的能量恢复到转换器的输出端，辅助开关，钳位二极管和钳位电容器配合以减少 转换器中的开关损耗和反向恢复电流。

公开(公告)号：US20210194290A1

公开(公告)日：2021-06-24

申请号：US17194302

申请日：2021-03-07

申请人： Hengchun Mao ,  Xuezhong Jia

发明人： Hengchun Mao ,  Xuezhong Jia

IPC分类号： H02J50/12 ,  H01F38/14 ,  H01F27/38 ,  H02J7/00 ,  H02M3/337 ,  B60L53/12 ,  H01F3/14 ,  H01F27/24 ,  H01F27/36

摘要： A device comprises a plurality of power converters, a resonator block and a connection block. The plurality of power converters is coupled to a power port having a voltage. Each power converter comprises a plurality of switch networks, and each switch network has a plurality of power switches. The resonator block comprises a plurality of resonators. Each resonator has a resonant capacitor and is coupled to one of the plurality of power converters. The connection block comprises a switching component and is coupled to one of the plurality of resonators, and the connection block and the said resonator are configured such that the device operates in a wireless charging mode with the resonator block activated or a wired charging mode with the connection block activated.

公开(公告)号：US09490740B2

公开(公告)日：2016-11-08

申请号：US14467027

申请日：2014-08-24

申请人： Hengchun Mao

发明人： Hengchun Mao

IPC分类号： H02P25/22 ,  H02K11/00 ,  H02P25/18 ,  H02P21/00 ,  H02K3/28 ,  H02K3/12 ,  H02K17/14

CPC分类号： H02P25/18 ,  H02K3/12 ,  H02K3/28 ,  H02K17/14 ,  H02P21/0089 ,  H02P25/188 ,  H02P25/22

摘要： An apparatus for controlling a motor/generator having a plurality of windings comprises a stator magnetically coupled to a rotor and having a plurality of slots and a plurality of windings, a controller and a power converter means. Each winding is installed in two corresponding slots, and a plurality of magnetic poles and a plurality of phases in each pair of poles are formed when currents flow through the windings, and the windings are configured such that the number of phases and the number of poles can be dynamically. The controller comprises a pole and phase mapping for controlling the winding of the motor/generator to a pole and a phase, and a phasor control for controlling currents of the windings such that the number of poles of the motor/generator and the number of phases in a pair of poles are dynamically adjusted through a phase relationship between the currents of the windings. The power converter means is controlled by the controller for controlling the winding currents of the motor/generator.

摘要翻译： 用于控制具有多个绕组的电动机/发电机的装置包括磁耦合到转子并具有多个槽和多个绕组的定子，控制器和功率转换器装置。 每个绕组安装在两个对应的槽中，当电流流过绕组时，在每对极中形成多个磁极和多个相，并且绕组被配置为使得相数和极数 可以动态 控制器包括用于控制电动机/发电机到极和相的绕组的极点和相位映射，以及用于控制绕组电流的相量控制，使得电动机/发电机的极数和相数 通过绕组电流之间的相位关系动态地调节一对极点。 功率转换器装置由控制器控制，用于控制电动机/发电机的绕组电流。

公开(公告)号：US09344042B2

公开(公告)日：2016-05-17

申请号：US14185885

申请日：2014-02-20

申请人： Hengchun Mao

发明人： Hengchun Mao

IPC分类号： H03F3/45 ,  H03F1/02 ,  H03F1/32 ,  H03F1/56 ,  H03F3/195 ,  H03F3/24

CPC分类号： H03F1/0222 ,  H02M7/483 ,  H02M2001/0074 ,  H03F1/025 ,  H03F1/32 ,  H03F1/56 ,  H03F3/195 ,  H03F3/245 ,  H03F2200/102 ,  H03F2200/15 ,  H03F2200/387 ,  H03F2200/541

摘要： A device comprises a switch network having a plurality of switch cells connected in series, an output voltage at an output voltage port with an output capacitor, and an impedance network coupled between the switch network and an output voltage port with an output capacitor. Each switch cell has a plurality of input voltages and a plurality of switches, in which each switch is coupled to an input voltage, and a first input voltage coupled to a first switch has a different value from a second input voltage coupled to a second switch. The output voltage is configured to be a combination of the input voltages of the switch network in the form of: Vo=Σ1NKi×Vi, where Vo is the output voltage, N is the number of input voltages, Vi is the ith input voltage, and Ki is an integer equal to 0 or 1 depending on the ON/OFF status of the switches in the switch network.

摘要翻译： 一种设备包括具有串联连接的多个开关单元的开关网络，具有输出电容器的输出电压端口处的输出电压以及耦合在开关网络和具有输出电容器的输出电压端口之间的阻抗网络。 每个开关单元具有多个输入电压和多个开关，其中每个开关耦合到输入电压，并且耦合到第一开关的第一输入电压具有与耦合到第二开关的第二输入电压不同的值 。 输出电压被配置为开关网络的输入电压的组合，形式为：Vo =＆Sgr; 1NKi×Vi，其中Vo是输出电压，N是输入电压的数量，Vi是第i个输入 电压，Ki是整数等于0或1，这取决于交换机网络中交换机的ON / OFF状态。