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1. 发明申请

US20110241430A1 METHOD FOR CONTROLLING SYSTEM GAIN OF UPS 审中-公开
标题翻译：控制UPS系统增益的方法
公开(公告)号：US20110241430A1
公开(公告)日：2011-10-06
申请号：US13080341
申请日：2011-04-05
申请人： Fang Liu , Zhongjun Wei , Xiaoyu MI , Xunbin Wu
发明人： Fang Liu , Zhongjun Wei , Xiaoyu MI , Xunbin Wu
IPC分类号： H02J9/00
CPC分类号： H02M3/3376 , H02J9/062 , H02M2001/0058 , Y02B70/1433 , Y02B70/1491 , Y02P80/112 , Y10T307/625
摘要： The present invention discloses a control method for the system gain of a UPS, which includes the steps of: S1: detecting a PFC unit so as to determine whether to start an LLC, and if so, then going to step S2; otherwise, going to step S8; S2: starting the LLC; S3: detecting the mains supply so as to determine whether to switch from the mains supply to a battery, and if so, then going to step S4; otherwise, going to step S5; S4: performing a frequency-fixed adjustment on the LLC with an operating frequency larger than a resonating frequency by a preset magnitude while clearing an integral quantity within a first preset time T1; and performing a frequency-fixed adjustment on the LLC with an operating frequency equal to the resonating frequency while clearing the integral quantity between the first preset time T1 and a second preset time T2, and going to step S8; S5: determining whether the LLC-in-series resonant converter has an overload, and if so, then going to step S6; otherwise, going to step S7; S6: performing a frequency-fixed adjustment on the LLC-in-series resonant converter with the operating frequency equal to the resonating frequency while clearing the integral quantity; and going to the step S8; S7: performing a normal PI adjustment on the LLC-in-series resonant converter; and S8: Ending. The operation condition of the PFC is detected in real time, the LLC is started when the PFC becomes abnormal, and the LLC is adjusted in response to a load during operating so that the system gain is maintained in a monotonously step-down region of a ZVS region.
摘要翻译：本发明公开了一种用于UPS的系统增益的控制方法，包括以下步骤：S1：检测PFC单元以确定是否启动LLC，如果是，则进入步骤S2; 否则，进入步骤S8; S2：启动LLC; S3：检测主电源，以确定是否从电源切换到电池，如果是，则进入步骤S4; 否则，进入步骤S5; S4：在第一预设时间T1内清除积分量的情况下，以大于谐振频率的工作频率在LLC上执行频率固定调整预定幅度; 以及在清除第一预设时间T1和第二预设时间T2之间的积分量的情况下，以等于谐振频率的工作频率对LLC进行频率固定调整，并进入步骤S8; S5：确定LLC串联谐振变换器是否有过载，如果是，则进入步骤S6; 否则，进入步骤S7; S6：在清除积分量的同时，将工作频率等于谐振频率的LLC串联谐振变换器进行频率固定调整; 并进入步骤S8; S7：在LLC串联谐振转换器上执行正常的PI调节; 和S8：结束。 PFC实时检测运行状态，当PFC变为异常时，启动LLC，并在运行期间根据负载调整LLC，使系统增益保持在单调降压区域 ZVS区域。

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