POWER SUPPLY UNIT AND METHOD FOR CONTROLLING A POWER SUPPLY UNIT
    1.
    发明申请
    POWER SUPPLY UNIT AND METHOD FOR CONTROLLING A POWER SUPPLY UNIT 有权
    电源单元和控制电源单元的方法

    公开(公告)号:US20110163695A1

    公开(公告)日:2011-07-07

    申请号:US13062176

    申请日:2009-09-04

    IPC分类号: H05B41/38 H02J1/00

    摘要: A power supply unit is provided which comprises an AC/DC conversion unit with an input to which an input voltage is coupled and an output to which a DC bus voltage is coupled. The power supply unit furthermore comprises a DC bus capacitor which is coupled to the output of the AC/DC conversion unit. The power supply unit furthermore comprises at least one sub-power supply unit receiving the DC bus voltage as input for providing at least one power supply. The power supply of the at least one sub-power supply unit or part of the load is at least reduced or switched off if the input voltage falls below a predetermined threshold value.

    摘要翻译: 提供了一种电源单元,其包括具有与输入电压耦合的输入的AC / DC转换单元和连接有DC总线电压的输出。 电源单元还包括耦合到AC / DC转换单元的输出的DC总线电容器。 电源单元还包括至少一个子电源单元,其接收DC总线电压作为用于提供至少一个电源的输入。 如果输入电压低于预定阈值,则至少一个子电源单元或负载的一部分的电源至少减小或关断。

    Surge protection circuit
    2.
    发明授权
    Surge protection circuit 有权
    浪涌保护电路

    公开(公告)号:US09007730B2

    公开(公告)日:2015-04-14

    申请号:US12980554

    申请日:2010-12-29

    IPC分类号: H02H7/00 H02M1/42

    CPC分类号: H02M1/4208 Y02B70/126

    摘要: A surge protection circuit for a circuit having a rectification module. The surge protection circuit includes a first diode, a second diode, a capacitor and a discharge device. The anode of the first diode is connected to a first input of the rectification module, and the anode of the second diode is connected to a second input of the rectification module. The cathodes of the first and second diodes are both connected to the first plate of the capacitor. The second plate of the capacitor is connected to the negative output of the rectification module. The capacitor is configured such that it is consistently charged to substantially the peak value of a supply voltage during normal operation between surge events. The discharge device is connected to the first plate of the capacitor and is configured to discharge the capacitor when the voltage across the capacitor is in excess of the peak of the maximum value of the normal supply voltage and not discharge the capacitor when the voltage across the capacitor is not in excess of the peak of the maximum value of the normal supply voltage.

    摘要翻译: 一种具有整流模块的电路的浪涌保护电路。 浪涌保护电路包括第一二极管,第二二极管,电容器和放电装置。 第一二极管的阳极连接到整流模块的第一输入端,第二二极管的阳极连接到整流模块的第二输入端。 第一和第二二极管的阴极都连接到电容器的第一板。 电容器的第二板连接到整流模块的负极输出端。 电容器被配置为使得其在浪涌事件之间的正常操作期间一直被充电到基本上电源电压的峰值。 放电装置连接到电容器的第一板,并且当电容器两端的电压超过正常电源电压的最大值的峰值时,对电容器进行放电,并且当跨过电容器的电压 电容器不超过正常电源电压最大值的峰值。

    Power factor correction (PFC) circuit and method therefor
    4.
    发明授权
    Power factor correction (PFC) circuit and method therefor 有权
    功率因数校正(PFC)电路及其方法

    公开(公告)号:US08441237B2

    公开(公告)日:2013-05-14

    申请号:US12981142

    申请日:2010-12-29

    IPC分类号: G05F1/652 G05F1/656

    CPC分类号: H02M1/4208 Y02B70/126

    摘要: Consistent with an example embodiment, a circuit comprises a power factor correction stage having a DC input, a ground input, a DC output and a ground output. The circuit further includes a capacitor; a diode; and a discharge circuit. A first terminal of the diode is connected to an input of the power factor correction stage, a second terminal of the diode is connected to the first plate of the capacitor; and the second plate of the capacitor is connected to the other input of the PFC stage. The discharge circuit is connected to the capacitor and is configured to discharge the capacitor such that it contributes to the output of the PFC stage when the level of a signal at the input of the PFC stage falls below a threshold value.

    摘要翻译: 与示例实施例一致,电路包括具有DC输入,接地输入,DC输出和接地输出的功率因数校正级。 电路还包括电容器; 二极管 和放电电路。 二极管的第一端子连接到功率因数校正级的输入端,二极管的第二端子连接到电容器的第一板; 并且电容器的第二板连接到PFC级的另一个输入端。 放电电路连接到电容器,并且被配置为放电电容器,使得当PFC级的输入端的信号电平低于阈值时,它有助于PFC级的输出。

    Methods of controlling a synchronous rectifier
    5.
    发明授权
    Methods of controlling a synchronous rectifier 有权
    控制同步整流器的方法

    公开(公告)号:US08605465B2

    公开(公告)日:2013-12-10

    申请号:US12960332

    申请日:2010-12-03

    IPC分类号: H02M3/335

    摘要: Consistent with an example embodiment, there is a method of controlling a synchronous rectifier having an input signal having oscillations therein and a switch which is switchable between an open state and a closed state. The method comprises filtering the input signal to produce a filtered signal, comparing the filtered signal with a reference value, and opening the switch in response to the comparison, in which the filtering is active filtering.The active filtering may be based on determination of the peaks (positive and/or negative) of the signal, either directly, including a quarter period offset, or including decay—or a combination of the above; alternatively, the active filtering may be based on the a smoothing functions such as a switched low-pass filter or a short time integrator.

    摘要翻译: 与示例性实施例一致,存在一种控制具有其中具有振荡的输入信号的同步整流器和可在打开状态和闭合状态之间切换的开关的方法。 该方法包括对输入信号进行滤波以产生滤波信号,将滤波信号与参考值进行比较,并响应于比较而打开开关,其中滤波是有源滤波。 有源滤波可以基于直接确定信号的峰值(正和/或负),包括四分之一周期偏移,或包括衰减或上述的组合; 或者,有源滤波可以基于平滑功能,例如开关低通滤波器或短时间积分器。

    Switched mode converter and methods of controlling switched mode converters
    6.
    发明授权
    Switched mode converter and methods of controlling switched mode converters 有权
    开关模式转换器和控制开关模式转换器的方法

    公开(公告)号:US09263955B2

    公开(公告)日:2016-02-16

    申请号:US14342724

    申请日:2012-09-03

    摘要: A method is disclosed of controlling a switched mode converter comprising a switch and for providing power to device having a load, comprising: in response to the load exceeding a first threshold, operating in a first mode, being a CCM; in response to the load exceeding a second threshold and not exceeding the first threshold, operating in second mode, being a BCM without valley skipping wherein the switching frequency increases with decreasing load; in response to the load exceeding a third threshold and not exceeding the second threshold, operating in a third mode, being a BCM with valley skipping, wherein the switching frequency depends on the load and the number of valleys skipped and is between a fixed upper and a lower switching frequency limit; and in response to the load not exceeding the third threshold, operating in a fourth mode, being a BCM with valley skipping, wherein the switching frequency depends on at least the load, and is between an upper and a lower switching frequency limit wherein the upper switching frequency limit decreases with decreasing load. A switched mode converter controlled by such a method is also disclosed.

    摘要翻译: 公开了一种控制包括开关并用于向具有负载的装置提供电力的开关模式转换器的方法,包括:响应于所述负载超过第一阈值,以第一模式操作,为CCM; 响应于所述负载超过第二阈值且不超过所述第一阈值,在第二模式下操作,所述BCM不具有谷跳跃,其中所述开关频率随负载减小而增加; 响应于超过第三阈值并且不超过第二阈值的负载,以第三模式操作,作为具有谷跳跃的BCM,其中开关频率取决于跳过的负载和谷数,并且在固定的上限和 低开关频率限制; 并且响应于不超过第三阈值的负载,以第四模式操作,作为具有谷跳跃的BCM,其中开关频率至少取决于负载,并且处于上和下开关频率极限之间,其中上部 开关频率限制随负载减小而减小。 还公开了通过这种方法控制的开关模式转换器。

    Power factor correction stage with an adjustable delay time
    7.
    发明授权
    Power factor correction stage with an adjustable delay time 有权
    功率因数校正级,延时可调

    公开(公告)号:US08614902B2

    公开(公告)日:2013-12-24

    申请号:US12981128

    申请日:2010-12-29

    IPC分类号: H02M7/217

    摘要: A power factor correction stage comprising: an input terminal configured to receive an input signal; an output terminal configured to provide an output signal; a first converter stage and one or more further converter stages, wherein each of the converter stages is connected to the input terminal and the output terminal, and each converter stage comprises a switch; and a controller configured to operate the switches of the converter stages. The controller is configured to operate the switch of the one or more further converter stages at a period of time after operation of the switch of the first converter stage for a current switching cycle, wherein the period of time corresponds to a proportion of the switching frequency for an earlier switching cycle that does not correspond to substantially the period of the earlier switching cycle divided by the number of converter stages.

    摘要翻译: 一种功率因数校正级,包括:输入端,被配置为接收输入信号; 输出端子,被配置为提供输出信号; 第一转换器级和一个或多个其它转换器级,其中每个转换器级连接到输入端子和输出端子,并且每个转换器级包括开关; 以及控制器,被配置为操作所述转换器级的开关。 控制器被配置为在当前开关周期的第一转换器级的开关操作之后的一段时间内操作一个或多个其它转换器级的开关,其中该时间段对应于开关频率的比例 对于较早的开关周期,其基本上不对应于较早开关周期的周期除以转换器级的数量。