DC switching power supply system and the machine
This article describes the high-frequency switching DC power supply system and machine application experience and experience. As I am only familiar with Eaton Shiweiteke power so some of the views and opinions have some limitations, please understand.
Continuous high reliability of communication system requirements are obvious, but communication with the power of energy suppliers as a system than to a human heart is most fitting that. Complex network environments such as various non-standard electrical equipment operating over-voltage surges caused by lightning or power reliability is a major killer. So increasing the reliability of communication power and when the emergent solution? Some people think of DC and the machine program to solve, I think reliability will be increased exponentially in the 0.1 ~ 2. Programs poor choice would fall between 0.1 to 1, select the appropriate program will fall between 1 and 2. First of all I want to thank our Shiweiteke power has selected users the confidence of our products, I think the fact Rectifier N +1 redundant reliability has more than enough, and would like to thank those who are prepared to use our product users, you choose a company with 15 years of manufacturing experience communication power of international big companies, so I recommend you just set Shiweiteke power of the "a" sufficient power (in this set is a monitor.)
Strongly recommend the best solution:
DC power supply and two direct drive capacity is also no limit to work with only one monitor controlled rectifier to work as a backup to another monitor. Monitor can be manually backup or automatic backup, as Shiweiteke monitor power products have a normal monitor relay instructions, instructions manual backup when failure and automatic backup monitor is also more convenient to implement. The key point of this program is that the exchange of the two systems must be independent loop-powered circuit. Lead to the collapse of the entire system as the primary factor is the exchange of power in the mine or operation over voltage surges. Using two independent AC power supply circuit can greatly reduce the probability of the collapse of the entire system. Can be solved and the machine after the rectifier DC current sharing, the battery charge current limit function. Drawback is that two sets of power supply to be used for Shiweiteke (SM40 or more monitors).
The second program, DC, and hot backup machine monitor
Basically, with the first program, but must monitor SC200, SC200 using monitor standby features, a higher cost of the use of SC200, but it can be called perfect, and advanced machine. Line of Control between the two systems less and neat.
The third program, the diode and the machine
Diode and the machine is a traditional and more reliable programs, old and new sets of system is not restricted. Disadvantages are:
1. Diode voltage drop is high energy consumption
2. Capacity is limited, our highest achieved 400A.
Principle see below:
The fourth program, double the electricity sector and the local system
Double for power and computer system, usually two systems independent of each other. Rectifier only when a system in which the two systems have failed and there is pressure of about 1V when the two machines to enter and drive mode. In manual operation requires special care, to prevent interaction between the battery charge. And the machine used only as emergency and long-term use of the system are to be considered current, the battery charge current limit.
(Note: only one of a battery or a battery power supply situation has been used before-break switch, to ensure uninterrupted power in the switching load.)
Principle see below:
Fifth programs for the forces of two-and machine system
This program has solved the battery charge current limit function, no batteries on the charging issue. But the only two systems are not resolved flow problem. Note that the two systems must be identical, which applications have some limitations.
Principle see below:
Conclusion
Has advantages and disadvantages and limitations of each program, some programs are Shiweiteke only two systems to apply the product, so users can mix and avoid weaknesses according to actual needs. DC and the machine control program is more complex if used improperly would be counterproductive and will not improve the reliability of the system several times, but I think the more important of the two-machine system and the application of principles are:
1. Input circuit must select two completely different and independent circuits, the independent anti-surge, the better is an independent low-voltage transformer;
2. Control circuit is simple, such as the third option is relatively simple;
3. Considered as close to the load cell design, secure the load;
4. The application for the power sector, due to its power grid and the application environment is better than the specification, N +1 redundant rectifier reliability has more than enough. This is in the power sector for many years running the rectifier modules in the net sum up the resulting rework.
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