In order to compare the performance of power frequency machine and high frequency machine of uninterruptible UPS power supply.
It is necessary to know what is power frequency machine of UPS and what is UPS high frequency machine. Power frequency is so named because its rectifier and transformer operating frequency is 50Hz, its main components are IGBT inverter, thyristor (SCR)
rectifier, power frequency isolation transformer and bypass.
High frequency UPS usually adopts IGBT to carry out high frequency switching rectification, whose rectification frequency is above 10kHz.
About the UPS power frequency machine and high-frequency machine performance comparison.
In terms of reliability, the high-frequency machine is superior to the power frequency machine. The high-frequency machine USES a microprocessor and runs UPS with software programs.
It has obvious advantages in terms of volume and weight and has little impact on space and environment.
From the perspective of investment, high frequency machine is better than power frequency machine, this advantage is mainly reflected in their work efficiency, diesel engine ratio, and the equipment itself has nothing to do with the investment.
In addition, the high frequency machine is more energy saving than the power frequency machine . At present, most manufacturers in the market of high frequency machine using UPS power supply, its high frequency machine half load efficiency can reach 94%, power frequency machine half load efficiency is generally 88%, therefore, from this aspect, high frequency machine is better than power frequency machine.
In addition to the power frequency machine itself weight and volume is relatively large, plus the impact of the transformer, the installation of construction caused inconvenience, with the power condition, the high-frequency machine covers an area and weight is relatively small, can reduce the construction cost.
I believe you should know that no matter from the perspective of investment, energy saving, reliability, comprehensive evaluation, high frequency UPS power supply is better than power frequency UPS power supply.