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1.发明授权Current mode controller for continuous conduction mode power factor correction circuit and method of operation thereof 失效连续导通模式功率因数校正电路的电流模式控制器及其操作方法
公开(公告)号：US5912549A
公开(公告)日：1999-06-15
申请号：US905105
申请日：1997-08-01
CPC分类号： H02M1/4225 , Y02B70/126 , Y02P80/112
摘要： For use with a power factor correction circuit, a current mode controller, a method of operating current mode control to achieve power factor correction thereof and a power supply incorporating the controller or the method. In one embodiment, the controller includes: (1) a modulator, coupled to a switch in the power factor correction circuit, that senses an electrical characteristic and a current passing through the power factor correction circuit and provides, in response thereto, a control signal to the switch and (2) a compensation circuit, coupled to an input of the power factor correction circuit, that provides a compensation signal to the modulator that is a function of a rectified line voltage provided to the input of the power factor correction circuit. The compensation signal causes the modulator to modify the control signal to reduce a total harmonic distortion (THD) of the power factor correction circuit.
摘要翻译： 用于功率因数校正电路，电流模式控制器，操作电流模式控制以实现其功率因数校正的方法和结合该控制器或方法的电源。 在一个实施例中，控制器包括：（1）耦合到功率因数校正电路中的开关的调制器，其感测通过功率因数校正电路的电特性和电流，并响应于此提供控制信号 和（2）补偿电路，其耦合到功率因数校正电路的输入，该补偿电路为调制器提供补偿信号，该补偿信号是提供给功率因数校正电路的输入的整流线电压的函数。 补偿信号使调制器修改控制信号，以降低功率因数校正电路的总谐波失真（THD）。
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公开(公告)号：US06025999A
公开(公告)日：2000-02-15
申请号：US190953
申请日：1998-11-12
CPC分类号： H02M7/4807 , H02M3/33561 , H02M2001/007 , H02M2001/009
摘要： A power supply and a method of operating the same. In one embodiment, the power supply includes: (1) a DC-DC converter having an isolation transformer that conveys an alternating voltage of about a first frequency between a primary winding and at least one secondary winding thereof and (2) a four-quadrant inverter, coupled to one of the at least secondary winding, that converts a portion of the alternating voltage into a waveform having about a second frequency that is less than the first frequency, including: (2a) a bi-directional switch, coupled between an input and an output of the four-quadrant inverter and (2b) a controller, coupled to the switch, that activates the switch to couple the input to the output during a portion of a switching cycle of the alternating voltage to change voltages in the waveform.
摘要翻译： 电源及其操作方法。 在一个实施例中，电源包括：（1）具有隔离变压器的DC-DC转换器，其在初级绕组和至少一个次级绕组之间传送大约第一频率的交流电压，以及（2）四象限 逆变器，耦合到所述至少次级绕组中的一个，其将所述交流电压的一部分转换成具有小于所述第一频率的约第二频率的波形，所述第二频率包括：（2a）双向开关， 输入和四象限逆变器的输出，以及（2b）耦合到开关的控制器，其在交流电压的开关周期的一部分期间激活开关以将输入耦合到输出，以改变波形中的电压 。
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3.发明授权Switch driver for a snubber circuit, method of operation thereof and power converter employing the same 有权用于缓冲电路的开关驱动器，其操作方法和采用该驱动器的功率转换器
公开(公告)号：US6060867A
公开(公告)日：2000-05-09
申请号：US141820
申请日：1998-08-28
IPC分类号： H02M1/34 , H02M3/158 , H03K17/0814 , G05F1/613 , H02H7/10
CPC分类号： H02M1/34 , H02M3/158 , H03K17/08142 , H02M2001/342 , Y02B70/1491
摘要： In a power converter having a power switch, a rectifier and a snubber circuit having an auxiliary switch that moderates reverse recovery currents associated with the rectifier, a driver for the auxiliary switch, a method of driving the auxiliary switch and a power converter employing the driver and method. In one embodiment, the driver includes a first driver switch, coupled between the power switch and the auxiliary switch, that allows the auxiliary switch to turn on concurrently with the power switch. The driver also includes a second driver switch, coupled between the auxiliary switch and an output of the power converter, that prevents a voltage of the auxiliary switch from rising above an output voltage of the power converter to assist the auxiliary switch in turning off.
摘要翻译： 在具有电源开关，整流器和缓冲电路的功率转换器中，具有缓和与整流器相关联的反向恢复电流的辅助开关，用于辅助开关的驱动器，驱动辅助开关的方法和使用该驱动器的功率转换器 和方法。 在一个实施例中，驱动器包括耦合在电源开关和辅助开关之间的第一驱动器开关，其允许辅助开关与电源开关同时开启。 驱动器还包括耦合在辅助开关和功率转换器的输出端之间的第二驱动器开关，其防止辅助开关的电压升高到功率转换器的输出电压以上以帮助辅助开关断开。
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公开(公告)号：US5550458A
公开(公告)日：1996-08-27
申请号：US251163
申请日：1994-05-31
CPC分类号： H02M1/34 , H02M1/4225 , H02M3/155 , H02M2001/348 , Y02B70/126 , Y02P80/112
摘要： A boost converter includes a snubber with finite but limited losses to minimize active power switching losses and minimize turn-off losses of the boost diode without generating any additional circulating energy losses. An inductor is connected so as to slow turn off of the boost diode and minimize reverse recovery losses. This inductor additionally minimizes the turn-on switching losses of the active power switch of the converter by providing for zero-current turn-on. A series connection of a finite resistor and a second diode is connected in shunt with the inductor/boost diode connection to prevent excessive voltage ringing across the active power switch by clamping its voltage during turn-off. A third diode is connected to the junction of the inductor and boost diode to prevent the voltage across the boost diode from ringing during the on interval of the active power switch.
摘要翻译： 升压转换器包括具有有限但有限损耗的缓冲器，以最小化有功功率开关损耗并最小化升压二极管的关断损耗，而不产生任何额外的循环能量损失。 连接电感器，以缓慢关闭升压二极管，并最大程度地减少反向恢复损耗。 该电感器还通过提供零电流开启来最小化转换器的有功功率开关的导通开关损耗。 有限电阻和第二二极管的串联连接与电感/升压二极管连接分流，以防止在关断时钳位有功功率开关的过电压振荡。 第三个二极管连接到电感和升压二极管的结，以防止升压二极管两端的电压在有功功率开关的接通间隔期间振铃。
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5.发明授权Snubber circuit for a rectifier, method of operation thereof and power converter employing the same 失效用于整流器的缓冲电路，其操作方法和采用该整流器的功率转换器
公开(公告)号：US5991174A
公开(公告)日：1999-11-23
申请号：US141783
申请日：1998-08-28
IPC分类号： H02M1/34 , H02M3/158 , H03K17/0814 , H02H7/122
CPC分类号： H02M1/34 , H02M3/158 , H03K17/0814 , H02M2001/342 , Y02B70/1491
摘要： In a power converter having an input coupled to a power switch and a rectifier for conducting currents from the input to an output of the power converter, a snubber circuit for, a method of, moderating reverse recovery currents associated with the rectifier and a power converter employing the circuit or the method. In one embodiment, the circuit includes a snubber inductor and snubber capacitor coupled to the rectifier. The circuit further includes a first auxiliary switch that conducts to divert a portion of the currents away from the rectifier through the snubber inductor and snubber capacitor. The circuit still further includes a second auxiliary switch, interposed between the power switch and the first auxiliary switch, that conducts to create a path to discharge the capacitor to the output of the power converter.
摘要翻译： 在具有耦合到功率开关和整流器的输入的功率转换器中，所述整流器用于传导从所述输入到所述功率转换器的输出的电流，用于缓和与所述整流器相关联的反向恢复电流的方法的缓冲电路和功率转换器 采用电路或方法。 在一个实施例中，该电路包括耦合到整流器的缓冲电感器和缓冲电容器。 电路还包括第一辅助开关，其传导通过缓冲电感器和缓冲电容器将一部分电流偏离整流器。 电路还包括插在电源开关和第一辅助开关之间的第二辅助开关，其传导以产生将电容器放电到功率转换器的输出端的路径。
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6.发明授权Asymmetrical half-bridge converter having adjustable parasitic resistances to offset output voltage DC bias 失效具有可调寄生电阻以偏移输出电压DC偏置的非对称半桥转换器
公开(公告)号：US5870291A
公开(公告)日：1999-02-09
申请号：US936986
申请日：1997-09-25
申请人： Richard W. Farrington , Mark E. Jacobs , Rui Liu
发明人： Richard W. Farrington , Mark E. Jacobs , Rui Liu
IPC分类号： H02M3/335
CPC分类号： H02M3/33569
摘要： An asymmetrical half-bridge converter, a method of operating the same and a power supply that incorporates either the converter or the method. In one embodiment, the converter includes: (1) a power transformer that receives asymmetrical AC input power into a primary winding thereof via an input capacitor, the asymmetrical AC input power inducing a DC bias current in a secondary winding of the power transformer and (2) first and second serially-coupled output inductors coupled across the secondary winding and having parasitic resistances associated therewith that are independently selectable to attenuate the DC bias circuit in the secondary winding.
摘要翻译： 不对称半桥转换器，其操作方法以及包含转换器或方法的电源。 在一个实施例中，转换器包括：（1）电源变压器，其经由输入电容器将不对称的AC输入功率接收到其初级绕组中，所述非对称AC输入功率引起所述电力变压器的次级绕组中的DC偏置电流， 2）耦合在次级绕组两端并具有与其相关联的寄生电阻的第一和第二串联耦合的输出电感器，其独立地可选择以衰减次级绕组中的DC偏置电路。
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公开(公告)号：US5457379A
公开(公告)日：1995-10-10
申请号：US137682
申请日：1993-10-15
摘要： A switching boost regulator, including auxiliary circuitry having an auxiliary switch and inductor connected to operate the regulator in a zero-voltage transition mode, achieves substantial efficiency improvement by limiting losses in the auxiliary circuitry dedicated to achieving zero-voltage transition operation. Loss reduction circuitry included with the auxiliary circuitry cooperatively operates to limit turn-on and conduction losses and to suppress ringing of the components of the auxiliary circuit.
摘要翻译： 开关升压调节器包括具有辅助开关和电感器的辅助电路，其连接以在零电压转换模式下操作调节器，通过限制专用于实现零电压转换操作的辅助电路中的损耗来实现显着的效率提高。 辅助电路所包括的减少损耗电路协同工作，以限制导通和导通损耗，并抑制辅助电路的组件振铃。
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8.发明授权Circuit for estimating a peak or RMS value of a sinusoidal voltage waveform 失效用于估计正弦波电压波形的峰值或RMS值的电路
公开(公告)号：US5450029A
公开(公告)日：1995-09-12
申请号：US83747
申请日：1993-06-25
CPC分类号： H02M1/4225 , G01R19/02 , G01R19/04 , Y02B70/126 , Y02P80/112
摘要： An estimating circuit for application in estimating or deriving the value V.sub.rms.sup.2 or V.sub.peak.sup.2, of a line voltage V.sub.AC provides fast response time and a substantially ripple free value for these signals by the utilization of a controlled harmonic oscillator whose output precisely tracks the input voltage waveform. Two out of phase (by .pi./2) sine wave signals are derived from the input sine wave and these two out of phase signals are squared and summed to derive or estimate the desired square of the sine waveform signal at a fast response time while substantially excluding ripple of the estimated out of phase sine waves. An estimating circuit, described herein, comprises two integrator circuits series connected into a substantially closed loop. The output of the second integrator circuit is fed back to the input of the first integrator circuit. The output of each individual integrator circuit is a voltage sine wave separated in phase from the output of the other integrator by .pi./2 and in synchronism with the input substantially sine wave voltage V.sub.AC. The output of each of the integrator circuits is squared in an associated squaring circuit. Each output of one of the two squaring circuits is summed with the output of the other squaring circuit to produce the desired value of V.sub.peak.sup.2 or V.sub.rms.sup.2.
摘要翻译： 用于估计或导出线路电压VAC的值Vrms2或Vpeak2的估计电路通过利用其输出精确跟踪输入电压波形的受控谐波振荡器来为这些信号提供快速响应时间和基本上无纹波的值。 从输入正弦波导出两个异相（由pi / 2）正弦波信号，并且这两个异相信号被平方并相加以在快速响应时间导出或估计正弦波形信号的期望平方，同时基本上 除了估计的异相正弦波的纹波。 本文所述的估计电路包括连接到基本上闭合的环路中的两个积分器电路。 第二积分器电路的输出反馈到第一积分器电路的输入端。 每个单独积分器电路的输出是与另一个积分器的输出相位分离成π/ 2并与输入的基本正弦波电压VAC同步的电压正弦波。 每个积分器电路的输出在相关联的平方电路中平方。 两个平方电路中的一个的每个输出与另一个平方电路的输出相加，以产生所需的Vpeak2或Vrms2值。
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9.发明授权Power factor control arrangement for an OLS based on quarter cycle averaged power flow 失效基于四分之一周期平均功率流的OLS的功率因数控制装置
公开(公告)号：US5391976A
公开(公告)日：1995-02-21
申请号：US98183
申请日：1993-07-28
CPC分类号： H02M1/4208 , H02M2001/0012 , Y02B70/126
摘要： A power factor control system for a rectifier is operative through the generation of estimators of control input parameters (a peak squared input AC voltage E.sub.m.sup.2 and load power) and by the use of these substantially ripple free signals controls a boost, buck, buck-boost, SEPIC or other related type converter at the input to the rectifier. The generation of these parameters allows the derivation of a programmed current i.sub.p used to control the wave form of the actual input current. The control procedure is based on a quarter cycle averaged power basis. The input power is derived from the rms values of the input voltage and current. Given the output power and its deviations in power due to load changes, the programmed current i.sub.p is determined by deriving an input conductance of the rectifier and combining it with the input voltage.
摘要翻译： 用于整流器的功率因数控制系统通过产生控制输入参数（峰值平方输入AC电压Em2和负载功率）的估计器而工作，并且通过使用这些基本上无纹波的信号来控制升压，降压，降压 - 升压 ，SEPIC或其他相关类型转换器在整流器的输入端。 这些参数的产生允许导出用于控制实际输入电流的波形的编程电流ip。 控制程序是基于四分之一周期平均功率的基础。 输入功率是从输入电压和电流的有效值得出的。 给定输出功率及其由于负载变化引起的功率偏差，编程的电流ip通过导出整流器的输入电导并将其与输入电压组合来确定。
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公开(公告)号：US5572416A
公开(公告)日：1996-11-05
申请号：US255624
申请日：1994-06-09
IPC分类号： H02M7/06 , H02M1/00 , H02M1/42 , H02M3/155 , H02M3/156 , H02M7/12 , H02M7/217 , H03F1/34 , H02M7/04 , G05F1/625
CPC分类号： H02M1/4225 , H02M3/156 , H02M2001/0009 , Y02B70/126 , Y02P80/112
摘要： A converter for enhancing power factor utilizes a line sense winding magnetically coupled to sense a voltage across a line inductor in the input of a high power factor power converter. This winding in the illustrative embodiment is typically a single turn. This winding provides a measurement of the derivative (with respect to time) of the line current, and a specially designed integrator connected to the winding provides the estimate of the line current. An integrator is operative to accurately estimate the current by using known properties of this current to prevent mismeasurement due to reconstructing the "constant of integration" and any small biases in the integrator which normally cause errors.
摘要翻译： 用于增强功率因数的转换器利用磁耦合的线路感测绕组来感测高功率因数功率转换器输入端的线路电感器上的电压。 在说明性实施例中的该绕组通常是单回转。 该绕组提供线路电流的导数（相对于时间）的测量，并且连接到绕组的专门设计的积分器提供线路电流的估计。 积分器可以通过使用该电流的已知属性来准确地估计电流，以防止由于重建“积分常数”而导致的误测量以及通常导致误差的积分器中的任何小偏差。
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