1、 Conceptual category
Online UPS: refers to a UPS that adopts a fully dual conversion working mode of "mains rectification → DC → inverter". Regardless of whether the mains is normal or not, the load is always powered by the inverter (when the mains is normal, the rectifier converts AC power to DC power, some for the inverter and some for charging the battery; when the mains is interrupted, the battery discharges and supplies the inverter), with a switching time of zero. It includes two main types: high-frequency online UPS and power frequency online UPS.
High frequency online UPS: It is a type of online UPS that uses high-frequency conversion technology (without power frequency transformers) and belongs to the lightweight and high-efficiency branch of online UPS.
2、 Comparison of core differences
Comparing dimensions
Online UPS (including power frequency type)
Transformer types include bulky power frequency transformers (50/60Hz), large and heavy (due to power frequency transformers), efficiency: power frequency models usually have lower efficiency (85% -92%), output capacity: power frequency models have strong load capacity and can adapt to inductive loads such as motors and impact loads, anti-interference ability: power frequency transformers naturally have isolation and anti-interference advantages, cost: power frequency models have higher costs (complex materials and manufacturing processes), applicable scenarios: industrial environments, heavy equipment (such as motors and elevators)
High frequency online UPS
Transformer type: No power frequency transformer, using high-frequency switching technology (kHz level)
Volume and weight: compact and lightweight (saving space, low transportation and installation costs)
Efficiency: Higher efficiency (94% -97%, with some high-end models approaching 98%)
Output capability: Slightly weaker load capacity, more suitable for linear loads such as servers and IT equipment
Anti interference capability: relying on electronic filtering technology, the anti-interference capability is slightly weaker but still better than backup UPS
Cost: Low cost (simplified structure, more economical materials)
Applicable scenarios: data centers, communication base stations, office equipment, medical instruments, etc
3、 Summary
High frequency online UPS is a "lightweight and efficient version" of online UPS, which optimizes volume, weight, and efficiency by eliminating power frequency transformers, making it more suitable for scenarios with high requirements for space and energy efficiency; Traditional online UPS (power frequency type), on the other hand, is suitable for complex industrial environments due to its stronger load-bearing capacity and anti-interference ability. The core commonality between the two is "zero switching time" and "stable output", both of which can provide reliable power guarantee for critical equipment.
UPS recommends Shenzhen Yunhai Power Technology Co., Ltd. YH series UPS, which is tailor-made for various types of enterprise servers. It has multiple installation methods such as rack and tower, online dual conversion design, DSP digital technology, pure sine wave, excellent performance, high-end appearance, and explains the integration of cutting-edge technology and traditional products.
