The principle of uninterruptible power supply (UPS) for power supply
UPS is the abbreviation for Uninterruptible Power Supply in English, translated as uninterruptible power supply. From the rotary generator in the 1960s to the current static all electronic circuit with a certain degree of intelligence, it has also become increasingly mature with the rapid development of electronic technology, especially power devices and automatic control technology.
What can be frequently accessed is a backup power supply device used in computer applications to protect against accidental power outages and data loss. It can provide power for a certain period of time in the event of AC power interruption to ensure safe shutdown
The basic function is to provide uninterrupted power supply when the mains power is interrupted; Always provide high-quality AC power to the load, achieving voltage stabilization, frequency stabilization, suppression of surges, spikes, electrical noise, compensation for voltage sag, long-term low voltage interference and other factors. A dynamic UPS consists of an engine and a generator set. It is driven by AC mains electricity to rotate an AC motor, which in turn drives a coaxial AC generator and an inertia flywheel to rotate at the same speed. The generator supplies power to the load. Due to the inertia of the flywheel, there is no response to the interference caused by short-term voltage fluctuations during the operation of the mains wave, ensuring the stability of the output voltage; The power outage of the mains relies on the inertia of the flywheel to extend the rated voltage supply for another 5 seconds, due to the storage of data information. Later, it developed into internal combustion engine UPS systems, but these UPS systems are bulky, noisy, and inefficient, and are not widely used at present. Currently, the most commonly used UPS is still a static UPS. Generally speaking, UPS also refers to a static UPS, but the concept should be clearly defined.
Due to its limited application, dynamic UPS is commonly referred to as static UPS. Static UPS can be divided into three categories based on the power supply mode: online UPS (ON-LINE), backup UPS (also known as offline, OFF-LINE/ACK-UP), and online interactive (LINE-INTERACTION).
The application of uninterruptible power supply (UPS) in the power system has become increasingly widespread. With the popularization and application of power automation equipment such as power communication, unmanned substations, and microcomputer monitoring, the power system has put forward higher requirements for UPS. Although power plants have two power sources, this does not guarantee uninterrupted power supply to important loads such as computers. To ensure the power indicators of information equipment such as microcomputers, uninterruptible power supplies (UPS) must be used.
