公开(公告)号：US06259235B1

公开(公告)日：2001-07-10

申请号：US09383322

申请日：1999-08-26

申请人： Simon Fraidlin ,  Anatoliy Polikarpov

发明人： Simon Fraidlin ,  Anatoliy Polikarpov

IPC分类号： H02H7125

CPC分类号： H02M3/158

摘要： For use with a power converter couplable to a source of electrical energy, the converter having a power switch that conducts intermittently to transfer energy from the source to an inductive element, and a freewheeling diode that alternately conducts with the power switch to transfer energy to an output of the converter, an active clamp and a method of operating the active clamp. In one embodiment, the active clamp includes: (1) an inductor, coupled in series with the freewheeling diode, and (2) a series-coupled capacitor and clamping switch, coupled in parallel with the inductor, that cooperate therewith to mitigate adverse effects of reverse recovery currents associated with the freewheeling diode and enable substantially zero voltage switching of the power and clamping switches.

摘要翻译： 为了与能够耦合到电能源的功率转换器一起使用，转换器具有间歇地传导能量以将能量从源传递到电感元件的功率开关，以及与电源开关交替传导以将能量传递到电源的续流二极管 转换器的输出，有源钳位和操作有源钳位的方法。 在一个实施例中，有源钳位包括：（1）与续流二极管串联耦合的电感器，以及（2）与电感器并联耦合的串联耦合电容器和钳位开关，其与其配合以减轻不利影响 与续流二极管相关联的反向恢复电流，并使电源和钳位开关基本上为零电压切换。

公开(公告)号：US6144564A

公开(公告)日：2000-11-07

申请号：US305907

申请日：1999-05-05

申请人： Simon Fraidlin ,  Andrey Frolov ,  Anatoliy Polikarpov

发明人： Simon Fraidlin ,  Andrey Frolov ,  Anatoliy Polikarpov

IPC分类号： H02M3/335

CPC分类号： H02M3/33569

摘要： A single stage power converter, a method of processing rectified AC power, and a power supply incorporating the converter or the method. In one embodiment, the converter is couplable via a rectifier to a source of AC power, has a filter capacitor and an isolation transformer with a primary winding, and includes: (1) a significant energy storage device coupled to the primary winding, (2) a first switch, coupled to the primary winding, that conducts intermittently to couple the primary winding to the rectifier to transfer a portion of rectified AC power to a magnetizing inductance of the isolation transformer and (3) a second switch, coupled between the primary winding and the significant energy storage device, that conducts alternately with the first switch, the first and second switches substantially zero-voltage switching and the converter correcting a power factor of the AC power.

摘要翻译： 单级功率转换器，整流交流电源的处理方法，以及并入转换器或该方法的电源。 在一个实施例中，转换器可经由整流器耦合到AC电源，具有滤波电容器和具有初级绕组的隔离变压器，并且包括：（1）耦合到初级绕组的显着的能量存储装置，（2 ）耦合到所述初级绕组的第一开关，其间歇地导通以将所述初级绕组耦合到所述整流器以将整流的AC功率的一部分传递到所述隔离变压器的励磁电感;以及（3）耦合在所述初级绕组之间的第二开关 绕组和显着的能量存储装置，其与第一开关交替地传导，第一和第二开关基本上为零电压开关，并且转换器校正AC功率的功率因数。

公开(公告)号：US06239993B1

公开(公告)日：2001-05-29

申请号：US09602416

申请日：2000-06-23

申请人： Simon Fraidlin ,  Andrey Frolov ,  Sergey Louzanov ,  Anatoliy Polikarpov

发明人： Simon Fraidlin ,  Andrey Frolov ,  Sergey Louzanov ,  Anatoliy Polikarpov

IPC分类号： H02H7122

CPC分类号： H02M3/33569

摘要： A circuit associated with a power converter, a method of operation thereof and a power converter employing the circuit or the method. The power converter has a primary switching circuit coupled to a tapped primary winding of an isolation transformer and a rectifier coupled to a secondary winding of the isolation transformer. The circuit is coupled across a tapped portion of the tapped primary winding. In one embodiment, the circuit includes: (1) an inductor, configured to reduce current spikes in the primary switching circuit caused by a reverse recovery phenomenon associated with the rectifier and to effect substantially zero voltage switching of a power switch of the primary switching circuit; and (2) a diode, coupled to the inductor via the tapped portion, configured to clamp a voltage across the rectifier. The tapped portion is configured to enable energy from the inductor to be recovered within the power converter.

摘要翻译： 与功率转换器相关联的电路，其操作方法和采用该电路或方法的功率转换器。 功率转换器具有耦合到隔离变压器的抽头初级绕组的初级开关电路和耦合到隔离变压器的次级绕组的整流器。 该电路跨过敲击的初级绕组的抽头部分耦合。 在一个实施例中，电路包括：（1）电感器，其被配置为减少由与整流器相关联的反向恢复现象引起的初级开关电路中的电流尖峰，并实现初级开关电路的功率开关的基本零电压切换 ; 和（2）二极管，其经由所述抽头部分耦合到所述电感器，被配置为钳位整流器两端的电压。 敲击部分被配置为使得能够在电力转换器内恢复来自电感器的能量。

公开(公告)号：US06194880B1

公开(公告)日：2001-02-27

申请号：US09426230

申请日：1999-10-22

申请人： Simon Fraidlin ,  Andrey Frolov ,  Anatoliy Polikarpov

发明人： Simon Fraidlin ,  Andrey Frolov ,  Anatoliy Polikarpov

IPC分类号： G05F110

CPC分类号： H02M3/1588 ,  Y02B70/1466

摘要： A boost converter, a method of converting power and a power supply incorporating the boost converter or the method. In one embodiment, the boost converter has an input couplable to a source of electrical power and includes: (1) a boost inductor coupled to the input and adapted to conduct currents bidirectionally, (2) a first controllable switch coupled to the boost inductor, (3) a second controllable switch coupled to a node between the first controllable switch and the boost inductor and (4) a controller, coupled to the first and second controllable switches, that closes the first controllable switch to provide a charging conductive path across the input to charge the boost inductor and alternately closes the second controllable switch to provide: (4a) a forward conductive path from the boost inductor to an output of the boost converter when a voltage at the node exceeds a voltage at the output to provide power to the output and (4b) a reverse conductive path from the output to the boost inductor when the voltage at the output exceeds the voltage at the node to decrease the voltage at the node and thereby decrease a switching voltage of the first controllable switch.

摘要翻译： 一种升压转换器，一种转换功率的方法和结合了升压转换器的电源或该方法。 在一个实施例中，升压转换器具有可耦合到电力源的输入，并且包括：（1）耦合到输入并适于双向导通电流的升压电感器，（2）耦合到升压电感器的第一可控开关， （3）耦合到所述第一可控开关和所述升压电感之间的节点的第二可控开关，以及耦合到所述第一和第二可控开关的控制器，其关闭所述第一可控开关以提供穿过所述第一可控开关的充电导电路径 输入以对升压电感器充电并交替地关闭第二可控开关以提供：（4a）当节点处的电压超过输出端的电压以提供功率时，从升压电感器到升压转换器的输出的正向导电路径 输出和（4b）当输出电压超过节点处的电压以降低节点处的电压时，从输出到升压电感器的反向导电路径，以及 从而降低第一可控开关的开关电压。

公开(公告)号：US06191960B1

公开(公告)日：2001-02-20

申请号：US09567372

申请日：2000-05-09

申请人： Simon Fraidlin ,  Anatoliy Polikarpov

发明人： Simon Fraidlin ,  Anatoliy Polikarpov

IPC分类号： H02M542

CPC分类号： H02M3/3353 ,  H02M3/33576

摘要： A secondary active clamp for a power converter, a method of actively clamping energy of the power converter and a power converter employing the clamp or the method. The power converter has a primary switching circuit coupled to a primary winding of an isolation transformer and a rectifier coupled to a secondary winding of the isolation transformer. In one embodiment, the clamp includes (1) an inductor coupled in series with a freewheeling diode of the rectifier and (2) a series-coupled capacitor and clamping switch coupled in parallel with the inductor. The series-coupled capacitor and clamping switch cooperate with the inductor to mitigate adverse effects of a reverse recovery phenomenon associated with the rectifier and to effect substantially zero voltage switching of a power switch of the primary switching circuit.

摘要翻译： 用于功率转换器的次级有源钳位器，主动钳位功率转换器的能量的方法和采用钳位或方法的功率转换器。 功率转换器具有耦合到隔离变压器的初级绕组的初级开关电路和耦合到隔离变压器的次级绕组的整流器。 在一个实施例中，夹具包括（1）与整流器的续流二极管串联耦合的电感器和（2）与电感器并联耦合的串联耦合电容器和钳位开关。 串联耦合电容器和钳位开关与电感器配合以减轻与整流器相关的反向恢复现象的不利影响，并实现初级开关电路的功率开关的基本零电压切换。

公开(公告)号：US06317341B1

公开(公告)日：2001-11-13

申请号：US09711245

申请日：2000-11-09

申请人： Simon Fraidlin ,  Anatoliy Polikarpov

发明人： Simon Fraidlin ,  Anatoliy Polikarpov

IPC分类号： H02M7122

CPC分类号： H02M1/4258 ,  H02M3/33569 ,  Y02B70/126 ,  Y02B70/1433 ,  Y02P80/112

摘要： A switching circuit, a method of processing power and a single stage power factor corrector employing the switching circuit or the method. In one embodiment, the switching circuit includes: (1) a power switch coupled to a primary winding of a transformer; and (2) an active clamp coupled to the power switch. The active clamp includes: (2a) series-coupled first and second capacitors, coupled across the power switch and the primary winding, having opposing polarities thereacross, and (2b) a clamping switch coupled to a node between the series-coupled first and second capacitors. The clamping switch opens to allow energy stored in the first capacitor to be transferred to an output of the power converter via the second capacitor. The clamping switch further closes to allow energy stored in the second capacitor to be transferred to the output.

摘要翻译： 一种开关电路，一种处理功率的方法和采用该开关电路或该方法的单级功率因数校正器。 在一个实施例中，开关电路包括：（1）耦合到变压器的初级绕组的功率开关; 和（2）耦合到电源开关的有源钳位。 有源钳位包括：（2a）串联耦合的第一和第二电容器，跨过功率开关和初级绕组耦合，具有相反的极性，以及（2b）耦合到串联耦合的第一和第二 电容器 夹紧开关打开以允许存储在第一电容器中的能量通过第二电容器传递到功率转换器的输出端。 夹紧开关进一步关闭，以将存储在第二电容器中的能量传送到输出端。

公开(公告)号：US06282109B1

公开(公告)日：2001-08-28

申请号：US09560477

申请日：2000-04-28

申请人： Simon Fraidlin ,  Anatoliy Polikarpov

发明人： Simon Fraidlin ,  Anatoliy Polikarpov

IPC分类号： H02M542

CPC分类号： H02M7/217 ,  Y02P80/112

摘要： A controller or a method for regulating a non-isolated power factor corrector and a power factor corrector employing the controller or the method. The power factor corrector is adapted to provide a DC output voltage at an output thereof. The power factor corrector has first and second power switches, coupled to an input thereof, that receive unrectified AC power. In one embodiment, the controller includes: (1) a sensor, coupled proximate the input, that senses a polarity of the unrectified AC power and (2) a drive circuit, coupled to the sensor, that: (2a) closes the first power switch and modulates the second power switch to regulate the DC output voltage when the polarity is negative, and (2b) closes the second power switch and modulates the first power switch to continue to regulate the DC output voltage when the polarity is positive.

摘要翻译： 用于调节非隔离功率因数校正器的控制器或方法以及采用该控制器或方法的功率因数校正器。 功率因数校正器适于在其输出处提供DC输出电压。 功率因数校正器具有连接到其输入端的第一和第二功率开关，其接收未校正的AC电力。 在一个实施例中，控制器包括：（1）耦合在输入附近的传感器，其感测未修正的AC电力的极性，和（2）耦合到传感器的驱动电路：（2a）关闭第一功率 开关并调制第二个电源开关，调节极性为负极时的直流输出电压，（2b）关闭第二个电源开关并调制第一个电源开关，当极性为正时，继续调节直流输出电压。

公开(公告)号：US06272027B1

公开(公告)日：2001-08-07

申请号：US09627677

申请日：2000-07-28

申请人： Simon Fraidlin ,  Anatoliy Polikarpov

发明人： Simon Fraidlin ,  Anatoliy Polikarpov

IPC分类号： H02M3335

CPC分类号： H02M1/34 ,  H02M1/4258 ,  H02M2001/342 ,  Y02B70/126 ,  Y02B70/1491 ,  Y02P80/112

摘要： An AC active clamp, a method of operating the same and a power factor corrector employing the AC active clamp or the method. The power factor corrector has a primary switching circuit coupled to a primary winding of an isolation transformer and a rectifier coupled to a secondary winding of the isolation transformer. The primary switching circuit has first and second power switches configured to receive unrectified AC power. In one embodiment, the AC active clamp includes a switching circuit having first and second clamping switches series coupled in opposition and a capacitor coupled to the switching circuit. The switching circuit and the capacitor are coupled across at least a portion of the primary winding and are configured to mitigate adverse effects of a reverse recovery phenomenon associated with the rectifier and to effect substantially zero voltage switching of the first and second power switches of the primary switching circuit.

摘要翻译： AC有源钳位器，其操作方法和使用AC有源钳位器的功率因数校正器或方法。 功率因数校正器具有耦合到隔离变压器的初级绕组的初级开关电路和耦合到隔离变压器的次级绕组的整流器。 主开关电路具有被配置为接收未校正的AC电力的第一和第二电源开关。 在一个实施例中，AC有源钳位包括开关电路，该开关电路具有相对耦合的第一和第二钳位开关和耦合到开关电路的电容器。 开关电路和电容器耦合在初级绕组的至少一部分上，并被配置为减轻与整流器相关联的反向恢复现象的不利影响，并实现初级绕组的第一和第二功率开关的基本零电压切换 开关电路。