With the development of miniaturization and decentralization of communication products, especially data products, and decentralized power supply of communication

With the wide use of embedded power supply, the market of embedded power supply is expanding rapidly, especially in recent years

For example, the construction has added great vitality to the embedded power supply market. This paper is used for integrated communication

According to the embedded power supply of the equipment, some introductions are made.

1. Application of embedded power supply

most embedded power supplies are matched with other communication products. Therefore, its application is

Miniaturized and integrated communication products, such as access products, data products, exchange end offices and small exchanges

Machine, small mobile base station (including PHS), etc. In addition, in some cases, the embedded power supply can also

It is used as a small power supply system alone.

2. classification of embedded power supply

embedded power supply, as the name suggests, is embedded in the integrated communication cabinet to connect the power supply in the same cabinet

The signal and data equipment provide DC power supply equipment and have certain universality at the same time. 

generally speaking, the input of embedded power supply is AC 220V, and the output is dc-48v or +24V is a primary power supply equipment.

from the perspective of power structure, it can be divided into embedded power system and embedded power unit.

In terms of overall dimensions, there are mainly 19 inches and 23 inches.

in terms of heat dissipation methods, there are mainly air cooling and self cooling.

3. characteristics of embedded power supply

generally speaking, the integrated equipment mainly has the following requirements for the embedded power supply applied in it, and

In other words, the embedded power supply should have the following characteristics: overall dimension: the width is 19 inches or 23 inches

Inch, which can be easily embedded in the standard 19 inch or 23 inch cabinet. The height is generally U-shaped

Bit. The depth is generally shallow; The output current is small, usually from 10a to 75A, so as to meet the requirements of the same machine

The power demand of the equipment in the rack is mainly; Small size, light weight, power density of rectifier module and system

High. Exquisite technology; It is generally single-phase input, which can adapt to severe power grid conditions. On the one hand, it is power transmission

On the other hand, there are certain requirements for lightning protection and surge capacity; Many systems

The rectifier module can be plug and play, and the system can be maintained online quickly and conveniently; The working ambient temperature range is wide,

It can even reach - 15 ℃ ~ 60 ℃; Higher requirements for electromagnetic compatibility and safety design

Communication products are in the same cabinet, so the requirements for electromagnetic compatibility and voltage stabilization are more strict.

design of embedded power system and embedded power unit

technical comparison

the structure and function of the embedded power supply system are consistent with the combined communication power supply. Including AC power distribution unit,

Multiple rectifier modules, DC power distribution unit and monitoring module operating in parallel. It has relatively perfect power supply

System functions, but the size is much smaller.

The embedded power supply unit is generally based on the common horizontal 19 inch or 13 inch rectifier module

In addition, some simple functions are added, such as equalization floating charge conversion, simple communication and simple power distribution function

Wait.

both embedded power system and embedded power unit can be used in integrated communication equipment, but both

There is a huge difference.

reliability: the embedded power supply system is a complete combined power supply structure with multiple rectifier modules

Block, N + 1 hot backup structure, high system reliability. Generally, there is only one embedded power supply unit. If

If the monomer is damaged, it can only be maintained by battery discharge; Capacity: the embedded power system can be configured

Multiple rectifier modules, large system capacity and good capacity expansion. The capacity of embedded power supply monomer

Small quantity; Installation and maintenance: the embedded power supply system is a complete system, and users can install it directly

When installed and used, the general system has the hot plug function of rectifier module, and the system can be maintained online quickly. Inlay

In order to complete the complete power function, the incoming power supply unit often needs to add various power distribution devices in the rack

Standby, heavy workload of customers and poor maintainability; Lightning protection: the embedded power system has perfect

Two level lightning protection capability, because there are level C and level D lightning protection designs in the system distribution and rectifier modules respectively,

The current discharge capacity of some systems can reach 40ka. The embedded power supply unit only has class D lightning protection device, which can prevent

Poor lightning strike and power grid surge capacity; In terms of battery management function: the embedded power supply system has relatively perfect performance

A better system can complete the following functions: automatic conversion of floating charge and charging

Electric current limitation and regulation, floating charge temperature compensation, battery low-voltage protection and even secondary power down. Embedded

The battery management function of the power supply unit is very simple, and the floating charge conversion should be realized manually; Communication monitoring party

Face: embedded power supply system is generally equipped with monitoring unit and corresponding communication interface, which can realize "three remotes"

Function. Most embedded power supply units have much worse functions in this regard.

to sum up, the embedded power supply system is suitable for occasions with high power requirements