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公开(公告)号：US20110176333A1
公开(公告)日：2011-07-21
申请号：US12907188
申请日：2010-10-19
IPC分类号： H02M3/335
CPC分类号： H02M3/33561 , H02M3/33592 , Y02B70/1475
摘要： In a power converter, the duty cycle of a primary winding circuit causes near continuous flow of power through the primary and secondary winding circuits during normal operation. By providing no regulation during normal operation, a very efficient circuit is obtained with a synchronous rectifier in the secondary operating at all times. However, during certain conditions such as start up or a short-circuit, the duty cycle of the primary may be reduced to cause freewheeling periods. A normally non-regulating isolation stage may be followed by plural non-isolating regulation stages. To simplify the gate drive, the synchronous rectifiers may be allowed to turn off for a portion of the cycle when the duty cycle is reduced. A filter inductance of the secondary winding circuit is sufficient to minimize ripple during normal operation, but allows large ripple when the duty cycle is reduced. By accepting large ripple during other than normal operation, a smaller filter inductance can be used.
摘要翻译： 在功率转换器中，初级绕组电路的占空比在正常工作期间通过初级绕组电路和次级绕组电路产生近乎连续的电力流动。 通过在正常工作期间不提供调节，在二次操作中始终可以使用同步整流器获得非常有效的电路。 然而，在诸如启动或短路的某些条件下，初级的占空比可以减小以产生续流周期。 正常非调节隔离阶段之后可以是多个非隔离调节阶段。 为了简化栅极驱动，当占空比减小时，同步整流器可以被允许关闭周期的一部分。 次级绕组电路的滤波电感足以在正常工作期间最小化纹波，但是当占空比减小时允许较大的纹波。 通过在正常工作以外接受大的纹波，可以使用较小的滤波电感。
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2.发明授权General self-driven synchronous rectification scheme for synchronous rectifiers having a floating gate 有权具有浮动栅极的同步整流器的一般自驱动同步整流方案公开(公告)号：US06256214B1
公开(公告)日：2001-07-03
申请号：US09267155
申请日：1999-03-11
IPC分类号： H02M7217
CPC分类号： H02M1/38 , H02M3/33592 , Y02B70/1475
摘要： A self-driven synchronous rectifier circuit having synchronous rectifiers with floating gates for a power converter or signal transformer. The circuit comprises a transformer (49, 70) having a secondary winding with a first and second terminal, a first synchronous rectifier (SQ1) coupled to the first transformer secondary winding first terminal and having a control terminal floating relative to ground and a first drive circuit coupled to the first synchronous rectifier floating control terminal and controlling the first synchronous rectifier. A first control signal is coupled to the first drive circuit, where the first control signal controls the first drive circuit as a function of a polarity reversal of a voltage across the first transformer (49, 70). A second synchronous rectifier (SQ2) is coupled to the first transformer secondary winding second terminal and has a control terminal floating relative to ground. A second drive circuit is coupled to the second synchronous rectifier floating control terminal and controls the second synchronous rectifier. A second control signal is coupled to the second drive circuit, where the second control signal controls the second drive circuit as a function of a polarity reversal of a voltage across the first transformer (49, 70).
摘要翻译： 具有用于功率转换器或信号变压器的具有浮动栅极的同步整流器的自驱动同步整流电路。 该电路包括具有第一和第二端子的次级绕组的变压器（49,70），耦合到第一变压器次级绕组第一端子并且具有相对于地面浮动的控制端子的第一同步整流器（SQ1）和第一驱动器 电路耦合到第一同步整流器浮动控制端并控制第一同步整流器。 第一控制信号耦合到第一驱动电路，其中第一控制信号根据第一变压器（49,70）两端的电压的极性反转来控制第一驱动电路。 第二同步整流器（SQ2）耦合到第一变压器次级绕组第二端子并且具有相对于地相互漂浮的控制端子。 第二驱动电路耦合到第二同步整流器浮动控制端子并控制第二同步整流器。 第二控制信号耦合到第二驱动电路，其中第二控制信号根据第一变压器（49,70）两端的电压的极性反转来控制第二驱动电路。
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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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6.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：US5325283A
公开(公告)日：1994-06-28
申请号：US896093
申请日：1992-06-08
CPC分类号： H02M3/335 , H02M3/337 , Y02B70/1433
摘要： An isolated zero-voltage-switching converter in which the magnetizing inductance of the isolating transformer is a resonant element and an open circuit is provided on the secondary side of the transformer during the time interval when both primary switches are off. When the secondary of the transformer is open, the magnetizing inductance is in series with the capacitances of the primary switches, thus forming a resonant circuit.
摘要翻译： 隔离变压器的励磁电感是谐振元件的绝缘零电压开关变换器，并且在两个初级开关断开的时间间隔期间，在变压器的次级侧设置开路。 当变压器的次级开路时，励磁电感与初级开关的电容串联，从而形成谐振电路。
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公开(公告)号：US08149597B2
公开(公告)日：2012-04-03
申请号：US12870326
申请日：2010-08-27
IPC分类号： H02M3/335
CPC分类号： H02M3/33592 , H02M2001/008 , Y02B70/1475 , Y10T307/406
摘要： A dc-dc converter system comprises a quasi-regulated bus converter and plural regulation stages that regulate the output of the bus converter. The bus converter has at least one controlled rectifier with a parallel uncontrolled rectifier. A control circuit controls the controlled rectifier to cause a normally non-regulated mode of operation through a portion of an operating range of source voltage and a regulated output during another portion. The bus converter may be an isolation stage having primary and secondary transformer winding circuits. For the non-regulated output, each primary winding has a voltage waveform with a fixed duty cycle. The fixed duty cycle causes substantially uninterrupted flow of power during non-regulated operation. Inductors at the bus converter input and in a filter at the output of the bus converter may saturate during non-regulated operation.
摘要翻译： 一个dc-dc转换器系统包括准调节总线转换器和多个调节总线转换器输出的调节级。 总线转换器具有至少一个具有并联不可控整流器的受控整流器。 控制电路控制可控整流器通过源电压的工作范围的一部分和另一部分的稳压输出引起正常的非调节工作模式。 总线转换器可以是具有初级和次级变压器绕组电路的隔离级。 对于非稳压输出，每个初级绕组具有固定占空比的电压波形。 固定占空比在非调节操作期间导致基本上不间断的电力流动。 在总线转换器输入端和总线转换器输出端的滤波器中的电感器可能在非调节操作期间饱和。
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公开(公告)号：US20130058133A1
公开(公告)日：2013-03-07
申请号：US13435679
申请日：2012-03-30
IPC分类号： H02M3/335
CPC分类号： H02M3/33592 , H02M2001/008 , Y02B70/1475 , Y10T307/406
摘要： A dc-dc converter system comprises a quasi-regulated bus converter and plural regulation stages that regulate the output of the bus converter. The bus converter has at least one controlled rectifier with a parallel uncontrolled rectifier. A control circuit controls the controlled rectifier to cause a normally non-regulated mode of operation through a portion of an operating range of source voltage and a regulated output during another portion. The bus converter may be an isolation stage having primary and secondary transformer winding circuits. For the non-regulated output, each primary winding has a voltage waveform with a fixed duty cycle. The fixed duty cycle causes substantially uninterrupted flow of power during non-regulated operation. Inductors at the bus converter input and in a filter at the output of the bus converter may saturate during non-regulated operation.
摘要翻译： 一个dc-dc转换器系统包括准调节总线转换器和多个调节总线转换器输出的调节级。 总线转换器具有至少一个具有并联不可控整流器的受控整流器。 控制电路控制可控整流器通过源电压的工作范围的一部分和另一部分的稳压输出引起正常的非调节工作模式。 总线转换器可以是具有初级和次级变压器绕组电路的隔离级。 对于非稳压输出，每个初级绕组具有固定占空比的电压波形。 固定占空比在非调节操作期间导致基本上不间断的电力流动。 在总线转换器输入端和总线转换器输出端的滤波器中的电感器可能在非调节操作期间饱和。
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公开(公告)号：US07787261B2
公开(公告)日：2010-08-31
申请号：US11982327
申请日：2007-11-01
IPC分类号： H02M3/335
CPC分类号： H02M3/33592 , H02M2001/008 , Y02B70/1475 , Y10T307/406
摘要： A dc-dc converter system comprises a quasi-regulated bus converter and plural regulation stages that regulate the output of the bus converter. The bus converter has at least one controlled rectifier with a parallel uncontrolled rectifier. A control circuit controls the controlled rectifier to cause a normally non-regulated mode of operation through a portion of an operating range of source voltage and a regulated output during another portion. The bus converter may be an isolation stage having primary and secondary transformer winding circuits. For the non-regulated output, each primary winding has a voltage waveform with a fixed duty cycle. The fixed duty cycle causes substantially uninterrupted flow of power during non-regulated operation. Inductors at the bus converter input and in a filter at the output of the bus converter may saturate during non-regulated operation.
摘要翻译： 一个dc-dc转换器系统包括准调节总线转换器和多个调节总线转换器输出的调节级。 总线转换器具有至少一个具有并联不可控整流器的受控整流器。 控制电路控制可控整流器通过源电压的工作范围的一部分和另一部分的稳压输出引起正常的非调节工作模式。 总线转换器可以是具有初级和次级变压器绕组电路的隔离级。 对于非稳压输出，每个初级绕组具有固定占空比的电压波形。 固定占空比在非调节操作期间导致基本上不间断的电力流动。 在总线转换器输入端和总线转换器输出端的滤波器中的电感器可能在非调节操作期间饱和。
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