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1. 发明授权

US06532160B2 Switching power supply 有权
公开(公告)号：US06532160B2
公开(公告)日：2003-03-11
申请号：US09885419
申请日：2002-01-03
申请人： Masahiko Hirokawa , Yasuhiro Murai , Tomomi Yamada
发明人： Masahiko Hirokawa , Yasuhiro Murai , Tomomi Yamada
IPC分类号： H02H7125
CPC分类号： H02M1/34 , H02M3/28 , H02M3/335 , H02M2001/346 , Y02B70/1491
摘要： A switching power supply comprises a transformer 3, a switching circuit 1, an output rectifier circuit, an output smoothing circuit, and a snubber circuit. A snubber capacitor 17 has one terminal connected to the one terminal of a snubber diode 19. The other end of the snubber capacitor is led to an output winding 4 of the transformer, while the other terminal of the snubber diode is led to the other of the electrode of an output rectifier diode 7. A snubber inductor 23 has one end connected to the connecting point of the snubber capacitor and the snubber diode, and the other end is. connected to the input side of the output smoothing circuit. The polarity of the diode is arranged to establish a charging loop circulating through the snubber diode, the snubber capacitor and the output winding of the transformer, so as to provide a reduced loss, in a cycle in which the voltage appearing at the output winding of the transformer is the reverse direction to the output rectifier diode.

2. 发明授权

US06297979B1 In-rush current controller with continuous cycle-by-cycle control 失效
标题翻译：具有连续逐周期控制的浪涌电流控制器
公开(公告)号：US06297979B1
公开(公告)日：2001-10-02
申请号：US09468311
申请日：1999-12-21
申请人： Man Sing Tse
发明人： Man Sing Tse
IPC分类号： H02H7125
CPC分类号： H02H9/001 , H02H9/026 , Y10S323/908
摘要： An in-rush current controller for a mains power rectification circuit including a fill wave rectifier and a capacitor. A serial resistor suppresses in-rush currents. The controller includes a sensing circuit that controls a pair of silicon controlled rectifiers to cyclically shunt or isolate the resistor during normal operation. Thus, power is not dissipated by the resistor and undesirable heat is not generated during normal operation. The sensing circuit responds to abrupt rises in voltage (typical of in-rush current conditions) to inhibit turn ON of the rectifiers so that the resistor is not shunted or isolated at such times.
摘要翻译：一种用于电源整流电路的浪涌电流控制器，其包括填充波整流器和电容器。串联电阻抑制浪涌电流。控制器包括感测电路，其控制一对可控硅整流器以在正常操作期间循环地分流或隔离电阻器。因此，电源不会消耗电力，而在正常运行期间不会产生不希望的热量。感测电路响应电压的突然上升（典型的浪涌电流条件），以阻止整流器的导通，使得电阻器在这样的时间不被分流或隔离。

3. 发明授权

US06704214B1 Excitation control system and method employing de-excitation trip logic 失效
标题翻译：励磁控制系统和采用去激励跳闸逻辑的方法
公开(公告)号：US06704214B1
公开(公告)日：2004-03-09
申请号：US10370212
申请日：2003-02-19
申请人： Irving A. Gibbs , Charles R. Mummert
发明人： Irving A. Gibbs , Charles R. Mummert
IPC分类号： H02H7125
CPC分类号： H02P9/14
摘要： An excitation control system includes a circuit breaker, a bridge and a controller. The bridge converts AC phases from the breaker to an excitation voltage. The controller includes an output to open the breaker, a first sub-system inputting voltages corresponding to the AC phases and outputting a sensed voltage, and a second sub-system inputting the excitation voltage and outputting a sensed excitation voltage. A first function detects a trip signal and responsively outputs firing signals to the bridge to provide a negative excitation voltage. A second function determines if a threshold is greater than the sensed voltage and if the trip signal is asserted, and responsively asserts the output to open the breaker. A third function determines if the trip signal is asserted and responsively delays for a predetermined time, unless a negative threshold is greater than the sensed excitation voltage, and after the predetermined time responsively asserts the output.
摘要翻译：励磁控制系统包括断路器，桥和控制器。桥将交流相从断路器转换为励磁电压。控制器包括用于打开断路器的输出，第一子系统输入对应于AC相的电压并输出感测电压，以及第二子系统输入激励电压并输出感测的激励电压。第一功能检测跳闸信号并且响应地将触发信号输出到桥以提供负激励电压。第二功能确定阈值是否大于检测到的电压，并且如果跳闸信号被断言，并且响应地断言输出以断开断路器。第三功能确定跳闸信号是否被断言并且响应地延迟预定时间，除非负阈值大于感测到的激励电压，并且在预定时间响应地确定输出之后。

4. 发明授权

US06671193B1 Power source and arrangement for restricting the short-circuit current or rectifier 失效
标题翻译：用于限制短路电流或整流器的电源和布置
公开(公告)号：US06671193B1
公开(公告)日：2003-12-30
申请号：US10031194
申请日：2002-01-15
申请人： Seppo Pelkonen
发明人： Seppo Pelkonen
IPC分类号： H02H7125
CPC分类号： H02M1/32 , H02M3/33592 , Y02B70/1475
摘要： A power source with an arrangement for restricting short-circuit current includes at least a primary-side switch block, a transformer unit and a rectifier. The rectifier includes switching transistors for rectifying the secondary side of the transformer. Operation of the rectifier depends on a control from a pulse-forming part of the primary-side switch block. Control for the switching transistors in the rectifier is interrupted when the output current of the rectifier exceeds a limit value. At least one other switch element is arranged parallel to each of the switching transistors in the rectifier to realize a secondary-side rectification in an overload situation.
摘要翻译：具有用于限制短路电流的装置的电源至少包括初级侧开关块，变压器单元和整流器。整流器包括用于整流变压器次级侧的开关晶体管。整流器的工作取决于来自初级侧开关块的脉冲形成部分的控制。当整流器的输出电流超过限制值时，整流器中开关晶体管的控制被中断。至少一个开关元件与整流器中的每个开关晶体管并联布置，以在过载情况下实现次级侧整流。

5. 发明授权

US06493245B1 Inrush current control for AC to DC converters 失效
标题翻译： AC至DC转换器的浪涌电流控制
公开(公告)号：US06493245B1
公开(公告)日：2002-12-10
申请号：US09930818
申请日：2001-08-15
申请人： Vijay Gangadhar Phadke
发明人： Vijay Gangadhar Phadke
IPC分类号： H02H7125
CPC分类号： H02M1/4225 , H02H9/001 , Y02B70/126 , Y02P80/112 , Y10S323/908
摘要： The present invention provides for an apparatus and corresponding method for controlling inrush current in an AC-DC power converter by controlling the state of a plurality of silicon-controlled rectifiers (SCRs) when AC power is lost. The present invention provides full control of inrush current even during cold startup, warm startup, and power line disturbance conditions. The present invention controls inrush current without the need for an extra series dissapative device and its consequent additional losses. The preferred embodiment includes use of the present invention for AC-DC converters having active power factor correction. An alternative embodiment is for use in non-power factor corrected applications.
摘要翻译：本发明提供一种用于在AC电力丢失时通过控制多个硅控整流器（SCR）的状态来控制AC-DC电力转换器中的浪涌电流的装置和相应的方法。本发明即使在冷启动，暖启动和电力线干扰条件下也能全面控制浪涌电流。本发明控制浪涌电流，而不需要额外的串联消除装置及其随之的额外损耗。优选实施例包括将本发明用于具有有功功率因数校正的AC-DC转换器。替代实施例用于非功率因数校正应用。

6. 发明授权

US06778412B2 Synchronous converter with reverse current protection through variable inductance 有权
标题翻译：具有可变电感的反向电流保护的同步转换器
公开(公告)号：US06778412B2
公开(公告)日：2004-08-17
申请号：US10217993
申请日：2002-08-14
申请人： Jun Nagai , Tadahiko Matsumoto
发明人： Jun Nagai , Tadahiko Matsumoto
IPC分类号： H02H7125
CPC分类号： H02M3/33592 , H02M1/32 , Y02B70/1475
摘要： A DC-DC converter includes a reverse current detector for detecting a reverse current and a reverse current suppressor for increasing an input-output conversion ratio when a reverse current is detected. A choke coil increases the inductance in a current flowing region in which a very small reverse current flows and reduces the inductance in a current flowing region in which the current flowing is greater than or equal to that in a normal operation mode. In a reverse current flowing region in which the output current is negative, the DC-DC converter has unique regulation characteristics in which the amount of change in the output voltage relative to the amount of change in the output current is very large.
摘要翻译： DC-DC转换器包括用于检测反向电流的反向电流检测器和用于在检测到反向电流时增加输入 - 输出转换比的反向电流抑制器。扼流线圈增加电流流动区域中的电感，其中非常小的反向电流流动，并且减小电流流动区域中的电流大于或等于正常操作模式中的电流。在输出电流为负的反向电流流动区域中，DC-DC转换器具有独特的调节特性，其中输出电压相对于输出电流的变化量的变化量非常大。

7. 发明授权

US06735098B2 Inrush current limiting circuit, power source device and power conversion device 有权
标题翻译：浪涌电流限制电路，电源装置和电源转换装置
公开(公告)号：US06735098B2
公开(公告)日：2004-05-11
申请号：US10169727
申请日：2002-07-15
申请人： Khalid Hassan Hussein , Kazuaki Hiyama
发明人： Khalid Hassan Hussein , Kazuaki Hiyama
IPC分类号： H02H7125
CPC分类号： H02M1/36 , H02H7/1222 , H02H9/001 , H03K17/163 , H03K17/168 , Y10S323/908
摘要： An inrush current limiting circuit, a power source device, and a power conversion device. The circuit and devices limit an inrush current with high reliability and durability while reducing overall weight and volume of the device even under a high rated power. A switch, a capacitor, and a switching element are connected in series to one another, and the serial circuit formed thereof is connected to the main power source. An inverter is connected to the capacitor. A serial circuit formed of a capacitor and a resistor is connected between a collector and a gate of the switching element. A drive circuit drives a switching element to turn ON when the switch turns ON.
摘要翻译：浪涌电流限制电路，电源装置和电力转换装置。电路和器件即使在高额定功率下也能降低设备的整体重量和体积，从而极大地降低了浪涌电流的可靠性和耐久性。开关，电容器和开关元件彼此串联连接，并且其形成的串联电路连接到主电源。逆变器连接到电容器。由电容器和电阻器构成的串联电路连接在开关元件的集电极和栅极之间。当开关导通时，驱动电路驱动开关元件导通。

8. 发明授权

US06351402B1 AC adapter with current driven, zero-voltage switched synchronous rectifier 失效
标题翻译：交流适配器带电流驱动，零电压开关同步整流器
公开(公告)号：US06351402B1
公开(公告)日：2002-02-26
申请号：US09675482
申请日：2000-09-29
申请人： Barry N. Carroll
发明人： Barry N. Carroll
IPC分类号： H02H7125
CPC分类号： H02M3/33592 , H02M2001/0048 , Y02B70/1475 , Y02B70/1491
摘要： A rectifier comprising a current transformer configured to receive a bipolar signal. The current transformer is comprised of a primary coil and preferably two secondary coils with opposite polarities. The rectifier also includes a rectifying transistor coupled to one of the secondary coils in the current transformer. Positive current from the first secondary coil causes the transistor to turn on thereby allowing current to flow through the transistor from the input of the rectifier to the output of the rectifier. A pull-down transistor is coupled to a second secondary coil of the current transformer. Positive current from the second secondary coil causes the pull-down transistor to turn on. The pull-down transistor is configured to connect the control terminal of the rectifying transistor to ground, thereby turning the rectifying transistor off, when the pull-down transistor is turned on. The rectifier further comprises a diode coupled to each of the two secondary coils to allow only positive current flow through the secondary coils. The rectifier further comprises a capacitor coupled in parallel with the control terminal of the pull-down transistor which delays switching of the rectifying transistor, thereby permitting zero voltage switching of the rectifying transistor. The rectifier further comprises a hold-down transistor configured to ground the control terminal of the pull-down transistor, thereby holding the pull-down transistor off, when the rectifying transistor is on. Zener diodes are placed in parallel with the control terminals of the pull-down and rectifying transistors to regulate voltage and prevent damage to the transistors.
摘要翻译：一种整流器，包括被配置为接收双极性信号的电流互感器。电流互感器由初级线圈组成，优选地具有相反极性的两个次级线圈。整流器还包括耦合到电流互感器中的一个次级线圈的整流晶体管。来自第一次级线圈的正电流导致晶体管导通，从而允许电流从整流器的输入端流过晶体管至整流器的输出端。下拉晶体管耦合到电流互感器的第二次级线圈。来自第二次级线圈的正电流导致下拉晶体管导通。下拉晶体管被配置为在整流晶体管导通时将整流晶体管的控制端连接到地，从而使整流晶体管截止。整流器还包括耦合到两个次级线圈中的每一个的二极管，以仅允许正电流流过次级线圈。整流器还包括与下拉晶体管的控制端并联耦合的电容器，其延迟整流晶体管的开关，从而允许整流晶体管的零电压切换。整流器还包括保持晶体管，其被配置为将下拉晶体管的控制端接地，从而在整流晶体管导通时保持下拉晶体管截止。齐纳二极管与下拉和整流晶体管的控制端并联放置，以调节电压并防止损坏晶体管。

9. 发明授权

US06771521B1 Active snubber for synchronous rectifier 有权
标题翻译：用于同步整流器的主动缓冲器
公开(公告)号：US06771521B1
公开(公告)日：2004-08-03
申请号：US10371449
申请日：2003-02-20
申请人： Yahong Xiong , Zhongwei Ke , Alpha J. Zhang
发明人： Yahong Xiong , Zhongwei Ke , Alpha J. Zhang
IPC分类号： H02H7125
CPC分类号： H02M1/34 , H02M3/33592 , H02M2001/342 , Y02B70/1475 , Y02B70/1491
摘要： The invention relates to an active snubber for synchronous rectifier. The active snubber is coupled across a synchronous rectifier having a first synchronous MOSFET and a second synchronous MOSFET coupled to a transformer in a power converter. The active snubber includes a series-coupled active switch and first snubber capacitor which is coupled between a drain terminal and a source terminal of the first synchronous MOSFET, a gate driver operative to keep the active switch conducting a specified period of time during a non-conduction interval of the first synchronous MOSFET. The gate driver is composed of an auxiliary winding, a capacitor, and a resistor, wherein the auxiliary winding and the capacitor are connected in series and then coupled across the resistor in parallel, which is coupled between a gate and a source of the active switch.
摘要翻译：本发明涉及用于同步整流器的有源缓冲器。有源缓冲器耦合在同步整流器上，该同步整流器具有耦合到功率转换器中的变压器的第一同步MOSFET和第二同步MOSFET。有源缓冲器包括耦合在第一同步MOSFET的漏极端子和源极端子之间的串联耦合的有源开关和第一缓冲电容器，栅极驱动器可操作以使有源开关在非易失性存储器中保持特定的时间段，第一同步MOSFET的导通间隔。栅极驱动器由辅助绕组，电容器和电阻器组成，其中辅助绕组和电容器串联连接，然后并联耦合在电阻器两端，耦合在有源开关的栅极和源极之间。

10. 发明授权

US06724643B1 Control system and method employing active temperature balance for controlling rectifier bridge 有权
标题翻译：采用有源温度平衡控制整流桥的控制系统和方法
公开(公告)号：US06724643B1
公开(公告)日：2004-04-20
申请号：US10325246
申请日：2002-12-20
申请人： Irving A. Gibbs
发明人： Irving A. Gibbs
IPC分类号： H02H7125
CPC分类号： H02H7/1206
摘要： A method for controlling a parallel array of rectifier bridges includes outputting control signals to repetitively fire bridge elements; skipping repetitive firing of the elements for one out of plural counts; sensing temperatures of the elements; averaging some of the sensed temperatures to provide a corresponding average temperature for each of the parallel bridge elements; comparing one of the sensed temperatures to the corresponding average temperature; increasing the counts when the sensed temperature of one of the elements is less than the corresponding average temperature, or decreasing the counts when the sensed temperature of the one of the elements is greater than the corresponding average temperature; and setting the counts to a first predetermined value when the sensed temperature of the one of the elements is greater than a second predetermined value above the corresponding average temperature.
摘要翻译：一种用于控制整流桥并联阵列的方法包括输出控制信号以重复地发射桥元件; 跳过复数个元素的重复点火; 检测元件的温度; 平均感测温度中的一些以为每个平行桥接元件提供相应的平均温度; 将所感测的温度之一与相应的平均温度进行比较; 当一个元件的感测温度小于相应的平均温度时增加计数，或当所检测到的元件之一的温度大于对应的平均温度时减小计数; 以及当所述元件中的一个元件的感测温度大于高于相应平均温度的第二预定值时，将所述计数设置为第一预定值。

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