公开(公告)号：US4719559A

公开(公告)日：1988-01-12

申请号：US922006

申请日：1986-10-22

申请人： Nathan O. Sokal ,  Richard Redl

发明人： Nathan O. Sokal ,  Richard Redl

IPC分类号： H02M7/538 ,  H02M7/44

CPC分类号： H02M7/53803

摘要： A circuit for enabling current mode control to be used with a capacitively coupled power converter. The circuit includes circuitry for comparing the voltage across a coupling capacitor with its intended voltage and for generating an unbalance signal corresponding to any deviation. The unbalance signal and an inverse of the unbalance signal are alternately provided to the current mode controller to modify the control of two switches or two pairs of switches in the power converter so as to reduce the unbalance.

摘要翻译： 用于使电流模式控制与电容耦合功率转换器一起使用的电路。 电路包括用于将耦合电容器两端的电压与其预期电压进行比较并用于产生对应于任何偏差的不平衡信号的电路。 将不平衡信号和不平衡信号的反相交替地提供给电流模式控制器，以修改功率转换器中的两个开关或两对开关的控制，以减少不平衡。

公开(公告)号：US4607323A

公开(公告)日：1986-08-19

申请号：US601381

申请日：1984-04-17

申请人： Nathan O. Sokal ,  Richard Redl ,  Bela Molnar

发明人： Nathan O. Sokal ,  Richard Redl ,  Bela Molnar

IPC分类号： H02M3/155 ,  H03F3/217 ,  H02M7/19 ,  H03F1/14

CPC分类号： H03F3/2176 ,  H02M3/155

摘要： A Class E switching-mode dc/dc power converter is obtained by adding a rectifier circuit at the output of a Class E dc/ac power inverter. It can operate at high efficiency at high switching frequencies. Further, the power switch is not subjected to high power dissipation or high second-breakdown stress while it is switching between the "on" and "off" states, even if the dc load on the power converter varies over a very wide range, e.g., from open-circuit to short-circuit. The high efficiency is achieved by shaping the waveforms of switch voltage and switch current so that the transitions of those two waveforms are displaced in time from each other. Then the power switch does not experience simultaneously high voltage and high current while switching. High efficiency and low stress on the switch are achieved under all load conditions by interposing a matching network between the output of the Class E dc/ac inverter and the input of the rectifier circuit. That matching network transforms the rectifier input impedance in such a way that the impedance presented to the output of the Class E dc/ac inverter is always in the range which generates switch voltage and current waveforms that yield low power dissipation and low second-breakdown stress during switching, for any value of dc load resistance at the output of the rectifier.

摘要翻译： 通过在E类直流/交流电源逆变器的输出端添加整流电路，可获得E类开关模式的直流/直流电源转换器。 它可以在高开关频率下以高效率运行。 此外，即使在功率转换器上的直流负载在非常宽的范围内变化，电源开关在“接通”和“关闭”状态之间切换时也不会受到高功率耗散或高的第二击穿应力，例如 ，从开路到短路。 通过形成开关电压和开关电流的波形来实现高效率，使得这两个波形的转变在时间上彼此偏移。 然后电源开关在切换时不会同时遇到高电压和高电流。 在所有负载条件下，通过在E类直流/交流逆变器的输出端和整流电路的输入端之间插入一个匹配的网络来实现开关上的高效率和低应力。 该匹配网络将整流器输入阻抗变换为使得E类dc / ac逆变器的输出所呈现的阻抗始终处于产生低功耗和低二次击穿应力的开关电压和电流波形的范围内 在开关期间，对于整流器输出端的任何直流负载电阻值。

公开(公告)号：US5485361A

公开(公告)日：1996-01-16

申请号：US461127

申请日：1995-06-05

申请人： Nathan O. Sokal

发明人： Nathan O. Sokal

IPC分类号： H02M3/335

CPC分类号： H02M3/33507

摘要： A flyback charger for an energy-storage capacitor has a controller for causing the energy-storage pulses of current in the transformer primary winding and the energy-delivery pulses of current in the transformer secondary winding to be nearly flat-topped. The controller includes a peak-current-commanding current-mode control or a valley-current-commanding current-mode control which controls the duration of a switching circuit on and off interval, respectively, responsive to the current flowing in the transformer primary winding and secondary winding, respectively. A feed-forward controller controls the duration of the switching circuit off and on interval, respectively, in response to the voltage provided by the secondary winding and D-C supply voltage, respectively. When using the valley-current-commanding current-mode controller, there may be a fixed duration of the switching circuit on interval.

摘要翻译： 用于能量存储电容器的反激式充电器具有用于使变压器初级绕组中的电流的能量存储脉冲和变压器次级绕组中的电流的能量传递脉冲几乎平顶的控制器。 控制器包括峰值电流指令电流模式控制或谷值电流指令电流模式控制，其分别响应于在变压器初级绕组中流动的电流来控制开关电路的接通和断开间隔的持续时间，以及 次级绕组。 前馈控制器分别响应于次级绕组提供的电压和D-C电源电压分别控制开关电路的断开和接通时间间隔。 当使用谷电流指令电流模式控制器时，间隔开关电路可能有固定的持续时间。

公开(公告)号：US4928200A

公开(公告)日：1990-05-22

申请号：US106698

申请日：1987-10-06

申请人： Richard Redl ,  Nathan O. Sokal

发明人： Richard Redl ,  Nathan O. Sokal

IPC分类号： H02H7/122

CPC分类号： H02H7/1227

摘要： A circuit for decreasing the minimum duty ratio of a switching element in a power converter in response to a signal indicating that sensed current exceeds a second threshold. The circuit turns off the switching element when the sensed current exceeds a first threshold. The minimum duty ratio may be decreased, for example by increasing the period of the switching element or by increasing the "off" time of the switching element. The circuit protects against current runaway.

摘要翻译： 一种用于响应于指示感测电流超过第二阈值的信号降低功率转换器中的开关元件的最小占空比的电路。 当感测到的电流超过第一阈值时，电路关断开关元件。 例如，可以通过增加开关元件的周期或增加开关元件的“截止”时间来减小最小占空比。 该电路可防止目前的失控。