UPS is uninterruptive power supply, is an uninterruptible power supply containing the energy storage device. It is mainly used to give a part of a device that requires higher power stability to provide an uninterrupted power supply.
When the main electricity input is normal, the UPS supplies the mains motor pressure to the load. At this time, the UPS is an AC regulator, and it also charges the battery in the machine; when the market is interrupted (accident shutdown) When the UPS immediately continues to supply 220V alternating current to the load through the inverter switching conversion, allowing the load to maintain the normal operation and protect the load, hardware is not damaged. UPS devices typically provide protection against high voltage or high voltage.
The uninterruptible power supply (UPS) is to connect the battery (mostly lead-acid-free maintenance storage) to the host, and the direct current is converted into a commercial system device for a motor inverter circuit. It is mainly used to provide stable, uninterrupted electricity supplies to a single computer, computer network system, or other power electronic equipment such as solenoid valve, pressure transmitter, and the like.
Uninterruptible power supply is widely used in: mines, aerospace, industrial, communication, national defense, hospital, computer business terminal, network server, network equipment, data storage equipment, emergency lighting system, railway, shipping, transportation, power plants, substations, nuclear power plants, fire protection Security alarm system, wireless communication system, program-controlled switch, mobile communication, solar storage energy conversion equipment, control equipment and its emergency protection system, personal computer and other fields.
Most of the inverters in the new UPS use PWM technology, and the frequency of the quartz crystal oscillation control the inverter is used, ensuring the stability of the output voltage by the voltage negative feedback circuit. It has a series of advantages of switching power supply, by adjusting the pulse width, ensuring power stabilizing output, while. The application of switching power supply technology also reduces its own loss. The main technical indicators are as follows:
(1) Rated output power and output power;
(2) Switching time;
(3) The output voltage is stable, the reference value is ± 0.5% ~ ± 2%;
(4) The output frequency is stable, the reference value is ± 0.01% ~ ± 0.5%;
(5) The output waveform is pure (sine wave output), the voltage distortion is less than 1%, and there is no problem with the loss of the loss;
(6) High efficiency and low loss. The reference indicator is higher than 90%;
(7) There is no fault working time. Due to the use of microprocessor monitoring technology and advanced IGBT drive type SPWM, the current UPS has reached a high level of reliability. For large UPS power supplies, the annual average annual average of the single machine is not faulty (MTBF ) Has exceeded 200,000 hours. If the multi-machine "redundant" type UPS power supply system output from the dual bus is used, its MTBF can even reach the order of 10 million hours.
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