What is a fully embedded switching power supply system?
Most embedded switching power supplies are compatible with other communication products. Therefore, its applications are miniaturized and integrated communication products, such as access products, data products, switching end offices, small switches, small mobile base stations (including PHS) and so on. In addition, the embedded power supply can also be used as a small power supply system alone.
Embedded power supply, as its name implies, is a power supply device embedded in an integrated communication cabinet, which provides basic DC power for communication and data equipment in the same cabinet. At the same time, it has certain universality. Generally speaking, the input of embedded power supply is AC 220V, and the output is DC -48V? Or +24V, which is the main power supply equipment.
According to the power structure, it can be divided into embedded power system and embedded power unit.
Overall size, mainly 19? Inches and 23? Two kinds of inches. From the perspective of heat dissipation methods, there are mainly two kinds of air cooling and self-cooling.
Generally speaking, embedded power supply should have the following characteristics:
Overall dimensions: the width is 19 inch or 23 inch, which can be easily embedded in the standard 19 inch or 23 inch cabinet.
The output current of (1) is small, generally from 10A? To 75A? Probably, it is mainly to meet the power demand of the same rack equipment.
(2) The rectifier module and system are small in size, light in weight and high in power density.
(3) Generally, it is single-phase input, which can adapt to harsh power grid conditions. On the one hand, the input voltage range is wide, on the other hand, there are certain requirements for lightning protection and surge capacity.
(4) The rectifier module is plug and play, and online maintenance is fast and convenient.
(5) Wide working environment temperature range.
(6) Because it is in the same cabinet with communication products, it has higher requirements for electromagnetic compatibility and safety design.
According to the different power supply structure
At present, there are two kinds of power equipment used in integrated communication and data equipment: embedded power system and embedded power unit. The system structure and function of embedded power supply system are consistent with that of combined communication power supply, including AC power distribution unit, multiple rectifier modules running in parallel, DC power distribution unit and monitoring module. Although small in size, it has relatively perfect power system functions. Embedded power supply unit is generally used in ordinary horizontal 19? Inches or 13? Inch rectifier module, plus some simple functions, such as floating charge conversion, simple communication and power distribution functions.
Both embedded power supply system and embedded power supply unit can be used for integrated communication equipment, but there are huge differences between them, mainly in the following aspects:
In terms of reliability, the embedded power supply system is a complete combined power supply structure, which adopts multiple rectifier modules and N+ 1? Hot backup structure, high system reliability; Generally there is only one embedded power supply unit. If the unit is damaged, it can only be maintained by battery discharge. In terms of capacity, the embedded power supply system can be equipped with multiple rectifier modules, which has large system capacity and good expansibility; But the capacity of embedded power supply unit is very small.
In terms of installation and maintenance, the embedded power supply system is a complete system, which can be directly installed and used by users. The general system has the hot plug function of rectifier module, which can quickly maintain the system online. In order to complete the complete power supply function, the embedded power supply unit often needs to add various power distribution equipment to the rack, which has a heavy workload for customers and poor maintainability.
In terms of lightning protection, the embedded power supply system has perfect two-level lightning protection capability, because the power distribution and rectifier modules of the system have C-level and D-level lightning protection designs, and some systems have 40kA current discharge capability; Embedded power supply unit only has d? A kind of lightning protection device has poor lightning protection performance and poor ability to resist power grid surge.
In terms of battery management functions, the embedded power supply system has perfect battery management functions, such as automatic conversion of uniform floating charge, limitation and adjustment of charging current, floating charge temperature compensation, battery under-voltage protection and even secondary power failure. The battery management function of embedded power supply unit is very simple, and the floating charge conversion should be realized manually.
In terms of communication monitoring, embedded power supply systems are generally equipped with monitoring units and corresponding communication interfaces, which can realize the "three remote" function; The function of most embedded power supply units in this respect is much worse.
The above is the information about embedded switching power supply that Bian Xiao shared with you today. The specific information is almost here. Generally speaking, this embedded switching power supply is more energy-saving, safer and more convenient than the traditional switching power supply. At the same time, the installation and maintenance are quite simple, and this kind of equipment called embedded switching power supply is not completely safe and reliable in lightning protection. It is mentioned in the article that lightning protection at C/D level is still flawed.
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