Power Frequency UPS power supply achieves 99% conversion efficiency through a double ended full bridge structure

In critical power scenarios such as data centers and medical equipment, users often prioritize the nominal capacity of UPS power supplies as the primary selection indicator, but tend to overlook the decisive impact of transistor connection methods on conversion efficiency. The Aiyat power supply adopts a double ended full bridge design, and its 55dB noise level and IP56 protection level reflect the unique electromagnetic compatibility processing logic of the Power Frequency.

Working principle and core structure analysis:

The pulse frequency modulation (PFM) technology of this product dynamically adjusts the switching frequency to match load changes, reducing switching losses by more than 30% compared to traditional PWM modulation. The dual ended full bridge transistor connection architecture realizes a bidirectional flow path of current, coupled with the low voltage and high current characteristics of the 12V battery pack, enabling the system to maintain a conversion efficiency of 99% even at 220VAC input. The structural design of the built-in battery pack increases the body size by 320cm, but eliminates the space occupation problem of external battery cabinets.

How technological differences affect practical applications:

The essential difference between the full bridge structure and the half bridge structure lies in the stress distribution of the power devices: in the former, each switch tube only bears 50% of the bus voltage, which allows the operating temperature to be maintained below 55 ℃ at an output power of 5kW. The variable frequency characteristics brought by PFM modulation, although optimizing light load efficiency, also result in a wide noise spectrum (50-55dB), which requires special evaluation in sound sensitive environments such as hospital MRI rooms. The IP56 protection level indicates that its sealing structure can completely prevent dust and resist strong water spray, making it suitable for humid and corrosive environments such as papermaking and chemical industry.

Application scenarios and understanding framework:

When choosing a Power Frequency UPS, three dimensions should be focused on: first, the thermal stability determined by the transistor topology (check the heat sink area), second, the load adaptability corresponding to the modulation method (check the efficiency curve under 20% -100% load), and third, the maintenance convenience of the built-in battery pack (observe the cabin door opening and closing design). For rail transit scenarios that require frequent charging and discharging, it is necessary to additionally verify the matching relationship between 6A charging current and battery cycle life.