·Difference Between High-frequency Machine and Industrial -frequency Machine
1. High frequency machine is to use high-frequency switching technology to replace high-frequency switching components of the rectifier and inverter frequency transformer UPS, commonly known as high frequency machine. High frequency machine has small size and high efficiency. High-frequency machine does not have isolation transformer, high-frequency current exists in the output of zero-line, which mainly comes from the electricity grid harmonic disturbance, UPS rectifier and inverter frequency pulse current, the load harmonic interference. Interference voltage not only has high voltage, but also difficult to remove. If the inverter power device encounters short circuit, the high DC voltage on DC bus will directly add to the load causing security risk. However, Industrial -frequency Machine will not encounter this kind of problem.2. High-frequency machine is the UPS used as a rectifier and inverter transformer devices. Commonly known as frequency machine, its main feature is stable and reliable power components, overload capacity and strong impact resistance. And the output voltage of frequency machine zero line is low, there is no high frequency components, which is even more important for computer network in terms of communication security.
3. performance comparison
Through these comparisons, it can be clearly seen that the Industrial -frequency Machine in many ways is superior to high-frequency machine. Industrial -frequency Machine can be the first choice for some important and critical loaded power protection program requiring a high reliability.
High frequency Machine and Industrial-frequency Machine indicators and performance comparison
|
Comparison of the performance indicators |
High Frequency UPS |
Frequency UPS |
|
Overload |
General |
Strong |
|
Anti-surge capability Input |
General |
Strong |
|
Output shock,short-circuit capacity |
General |
Strong |
|
Input PF value |
0.99 |
0.7 |
|
Efficiency of the unit |
85%～90% |
75%～85% |
|
Power density |
High |
Low |
|
Zero-to-voltage |
Relatively poor,with high-frequency component |
Better |
|
The output stage components |
More |
Less |
|
Capacity of power devices |
Less |
Large |
|
Extent of damage to the device failure |
High |
Low |
|
Reliability |
General |
Well |
|
Maintainability |
Complex |
Simple |
|
Weight |
Light |
Heavy |
|
Volume |
Small |
Large |
|
Match Generator resilience |
Poor |
Well |
|
Price |
Cheaper |
Relatively expensive |
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