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中文字数:5001,中文页数:12 英文字数:3187页数:10
At times, power from a wall socket is neither clean nor uninterruptible. Many abnormalities such as blackouts, brownouts, spikes, surges, and noise can occur. Under the best conditions, power interruptions can be an inconvenience. At their worst, they can cause loss of data in computer systems or damage to electronic equipment.
It is the function of an Uninterruptible Power Supply (UPS) to act as a buffer and provide clean, reliable power to vulnerable electronic equipment. The basic concept of a UPS is to store energy during normal operation (through battery charging) and release energy (through DC to AC conversion) during a power failure.
UPS systems are traditionally designed using analog components. Today these systems can integrate a microcontroller with AC sine wave generation, offering the many benefits listed below.
• High Quality Sine Wave output
• Flexibility
• Digital Filtering
• Parts and Complexity Reduction
• Ease of Interfacing
目前，市电既不“干净”也不具有可靠的持续性，生活中，有许多的异常情况如停电、用电管制、浪涌电压、电源噪声等都可能发生。在最乐观的情况下，电力中断仅导致生活的不便，但在最坏的情况下，电力中断可能导致计算机系统数据丢失或损坏电子设备。
不间断电源（UPS）的主要功能是对市电进行缓冲，并提供“干净”、可靠的能源给脆弱的电子设备。UPS系统基本的工作原理是，市电正常时存储能量（通过对电池充电），市电不正常时释放能量（由直流向交流转换）。
传统的UPS系统由分立的模拟元件构成，而在今天，它们可以由集成了正弦波发生器的微控制器构成，它的好处如下：
•具有高精度的正弦波输出
•设计方便
•可实现数字滤波器
•降低了电路复杂性
•接口简单
