UPS Power System Components
UPS power supply system consists of four parts: rectifier, energy storage, conversion, and switch control. Regulator function of the system is usually completed by the rectifier, the rectifier triac or frequency switch rectifier itself has a function of the output amplitude can be based on the change of control of the foreign, so that when the outer power changes, the output amplitude is substantially constant the rectified voltage. Purifying function by the storage battery to complete, the disturbance pulse rectifiers cannot eliminate glitches, and the rectified voltage is still present. Energy storage battery in addition to the function can store DC Direct, rectifiers, like pick up a large container capacitor, and the size of the equivalent capacitance is proportional to the size of storage batteries. Since the voltage across the capacitor is not mutation, online ups systems uses a capacitor for the smoothing characteristic of the pulse to eliminate a pulse interference, and it plays a purification function, also known as interference shielding.
The Main Part of the UPS Supply System
UPS power system is divided into two parts, the host and storage batteries. The rated output power depends on the host portion size, and this is related to the nature of the load, because the load drive capability of the UPS power for different performance and usually the load power should meet 70% of the rated power of the UPS power. The selection of the ups backup power capacity depends on the load power is mainly determined and the length of its backup time, this time will be different due to different business situations, and it is mainly determined by the access time of the backup power supply, usually in a few minutes or several hours ranging from. UPS power system can achieve self-start power supply after the grid voltage interruption is detected, and slowly discharge with the storage batteries as energy, but the storage batteries capacity will be gradually reduced with time, taking into account the end-of-life energy storage battery capacity drops to 50% and to leave a margin when the full capacity of the energy storage battery, the working time of UPS power supply system of our factory is 2 hours, half capacity working time is one hour.
UPS Power System Working Principle
AC-DC conversion: the alternating current from grid reduction voltage through autotransformer, full wave rectifier, and the filter turned into a DC voltage, supply to the inverter circuit. AC-DC input has soft-start circuit, can avoid the impact of power on the grid. DC-AC inverter circuit: the use of high-power IGBT module full-bridge inverter circuit, with great power surplus amount, especially small output impedance in the output dynamic range, has the characteristic of fast response. As a result of the high-frequency modulation limiting technology, and fast short circuit protection technology, the inverter supply voltage transients or to load shock or short circuit, it can work in a safe and reliable state.
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