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随着计算机应用的日益普及和信息技术的不断发展,高质量的供电成为广大计算机用户的普遍需求。计算机在运行期间供电的中断,将会导致随机存储器中数据的丢失和程序的破坏,有时甚至使磁盘损坏,造成难以弥补的损失。目前广泛使用的计算机靠其内部电源滤波电容储存的能量,在断电状态下一般能维持工作50ms左右。但为了避免计算机存储器中的数据丢失,就要求一旦市电发生断电时,必须有一种电源系统能在小于50ms的时间间隔内重新送电,以保证微机系统的正常运行。 计算机除了要求供电系统具有可长期可靠运行的特点之外,还要求供电系统的输出应保持良好的正弦波形,即对电网中的干扰有良好的隔离作用,同时不产生新的干扰。众所周
With the increasing popularity of computer applications and the continuous development of information technology, high-quality power supply has become a universal demand for computer users. An interruption in the power supplied to the computer during operation will result in the loss of data and the destruction of the program in random access memory, sometimes even damaging the disk, causing irreparable damage. Currently widely used computer by its internal power supply filter capacitor stored energy, the power state can generally maintain the work about 50ms. However, in order to avoid data loss in the computer memory, it is required that once the utility power is cut off, a power supply system must be able to re-send the power in a time interval less than 50ms to ensure the normal operation of the computer system. Besides requiring the power supply system to have long-term and reliable operation, the computer also requires that the output of the power supply system should maintain a good sine wave shape, that is, isolate the interference in the power grid without generating new interference. All week