There are differences between high-frequency machines and power frequency machines in the following aspects:
1. Working frequency: The working frequency of high-frequency machines is greater than 20kHz, while the working frequency of power frequency machines is less than 400Hz.
2. Ripple and noise: After rectification, the power frequency machine will generate a sine ripple of 100Hz, and there will still be more than 10% ripple after filtering. The working frequency of high-frequency machines is high, and the voltage after high-voltage rectification is basically constant DC, with ripple less than 0.1%. Therefore, high-frequency machines have lower noise levels than power frequency machines and are more suitable for office environments.
3. Efficiency: The operating efficiency of high-frequency machines is usually higher than that of power frequency machines, resulting in lower operating costs.
4. Volume and weight: The Schneider UPS power high-frequency machine has a smaller volume and weight than the power frequency machine, because the high-frequency machine adopts more advanced switching technology and eliminates the bulky power frequency transformer.
5. Requirements for power grid environment: High frequency machines have poor adaptability to power grid environment and load changes, and are more suitable for environments with relatively stable power grids, less dust, and appropriate temperature/humidity. And power frequency machines have better tolerance under harsh power grid and environmental conditions.
6. Price: Due to the use of more advanced technology and lower manufacturing costs, high-frequency machines are relatively cheaper compared to power frequency machines.
7. Dynamic response performance to load and mains changes: High frequency machines have poor dynamic response performance to load and mains changes, while power frequency machines perform better in this regard.
8. Input without power factor correction: High frequency machines can perform input active power factor correction, while power frequency machines cannot.
Overall, Schneider UPS high-frequency machines are superior to power frequency machines in terms of volume, weight, noise, efficiency, etc., but they are inferior to power frequency machines in terms of requirements for the power grid environment, dynamic response performance, and input without power factor correction. Therefore, the specific choice of UPS needs to be determined based on the actual application scenario and requirements.