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公开(公告)号：US07525376B2
公开(公告)日：2009-04-28
申请号：US11827139
申请日：2007-07-10
CPC分类号： H03F1/56
摘要： A power amplifier to provide a compensated output voltage to a load through a series-connected impedance. The power amplifier includes an inner positive current feedback loop that is capable of sensing changes in the resistance of the load, and which adjusts the effective impedance of the series-connected impedance seen by the load to reduce current induced changes in the level of the compensated output voltage provided to the load due to the presence of the series connected impedance.
摘要翻译： 功率放大器，通过串联连接的阻抗向负载提供补偿的输出电压。 功率放大器包括内部正电流反馈回路，其能够感测负载电阻的变化，并且其调节负载所看到的串联连接阻抗的有效阻抗以减少电流引起的补偿电平的变化 由于存在串联连接的阻抗，提供给负载的输出电压。
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公开(公告)号：US06956725B2
公开(公告)日：2005-10-18
申请号：US10246970
申请日：2002-09-18
CPC分类号： H01H9/542 , H01H2009/543 , H01H2009/544
摘要： The arc suppression system for electrical contacts includes a transistor, such as an IGBT, which is connected across the contacts. A control circuit controls the operation of the transistor such that the turning on of the transistor results in a current path around the contacts, thereby tending to prevent arcing across the contacts. A current sensor, such as a flyback transformer, is positioned in series with the contacts, wherein when the contacts open, current is interrupted through the contacts and the transformer, a secondary voltage results which is applied to the transistor, which tends to maintain the transistor on for a time which is sufficient to allow the contacts to either open or close without an arc.
摘要翻译： 用于电触点的电弧抑制系统包括跨接在触点上的诸如IGBT的晶体管。 控制电路控制晶体管的操作，使得晶体管的导通导致触点周围的电流路径，从而趋向于防止跨触点的电弧。 诸如回扫变压器的电流传感器与触点串联定位，其中当触点断开时，通过触点和变压器中断电流，产生施加到晶体管的次级电压，其倾向于维持 晶体管导通一段时间，足以允许触点打开或关闭而没有电弧。
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