As designers and constructors in the security industry, they often overlook the important part that has a significant impact on system stability - the security power supply. As the "heart" of the power supply safety system, any safety equipment cannot do without the security power supply. The safety and reliability of the security power supply are important conditions to ensure the normal operation of the communication system. Security power supply classification: 1、 Linear regulated security power supply: 1. Linear regulated power supply: According to convention, linear regulated power supply can be divided into two types: transformer type regulated power supply and switch type linear regulated power supply. 1.1 Transformer type linear regulated power supply: Its common feature is that the power device regulator operates in the linear region, regulating the voltage drop between the tubes to stabilize the output. Due to the large static loss of the regulating tubes, a large heat sink needs to be installed to dissipate heat. Moreover, because the transformer operates at the power frequency (50Hz) and is relatively heavy, this type of power supply has high stability.

Transformer type linear regulated power supply: Its common feature is that the power device regulator works in the linear region, adjusting the voltage drop between the tubes to stabilize the output. Due to the large static loss of the regulating tubes, a large heat sink needs to be installed to dissipate heat. Moreover, because the transformer works at the working frequency (50Hz) and is relatively heavy, this type of power supply has high stability

Security power supply is an indispensable electrical equipment for stable system operation. If there is no security power supply for the stable system, it will not be able to operate. The security power supply plays an important role in stabilizing the system and is known as the heart of the stabilizing system. Security power supply is an important component of the entire stable system. There are many security power supplies on the market, each with a different shape, weight, and quality.

When selecting a switching power supply, precautions should be taken: 1) Select appropriate input voltage specifications; 2) Choose the appropriate power. In order to increase the lifespan of the power supply, a model with an additional 30% output power rating can be selected. 3) Consider load characteristics. If the load is a motor, light bulb, or capacitive load, and the current is high at the moment of starting, a suitable power source should be selected to avoid overload. If the load is a motor, voltage reversal during shutdown should be considered. 4) In addition, it is necessary to consider the working environment temperature of the power supply and the presence of additional auxiliary cooling equipment. In case of excessively high ambient temperature, the power supply needs to be derated for output. The derating curve of environmental temperature on output power. 5) Select various functions according to the application requirements: protection function: overvoltage protection

1. When selecting a switching power supply, precautions should be taken: 1) Select appropriate input voltage specifications; 2) Choose the appropriate power. In order to increase the lifespan of the power supply, a model with an additional 30% output power rating can be selected. 3) Consider load characteristics. If the load is a motor, light bulb, or capacitive load, and the current is high at the moment of starting, a suitable power source should be selected to avoid overload. If the load is a motor, voltage reversal during shutdown should be considered. 4) In addition, it is necessary to consider the working environment temperature of the power supply and the presence of additional auxiliary cooling equipment. In case of excessively high ambient temperature, the power supply needs to be derated for output. The derating curve of environmental temperature on output power. 5) Select various functions according to the application requirements: protection function

Treatment method for high temperature of switching power transformer: Step 1 Firstly, from the perspective of the transformer itself, once there is a high temperature rise, overheating, and heating situation, it is mainly caused by four problems. 1. They are: copper loss, winding process issues, transformer iron loss, and transformer planned power too low. 2. No-load heating refers to the insulation of the transformer being damaged or the input voltage of the transformer being high. If the insulation is damaged, the coil needs to be rewound. If the input voltage is high, the input voltage needs to be reduced or the number of coils needs to be increased. 3. If the voltage is normal and generates heat and heat under load, it means that the load of the power transformer is too large and the load design needs to be changed.

1. Waterproof, the sealing adhesive tightly wraps the entire electrical part of the product, completely isolating it from the outside world; What kind of water, moisture, acid, alkali, and salt cannot touch the circuit components, which can improve the waterproof, moisture-proof, and corrosion-proof ability. So the adhesive you choose should have good flowability. If the flowability is not good, how can it penetrate deeply and completely seal; Moreover, the adhesive force must also be possessed, otherwise it is useless for the components to be separated from each other for a long time after sealing, and the product\'s lifespan and performance will also be affected

Linear power sources mainly include power frequency transformers, high-power rectifier circuits, output rectifier filters, control circuits, protection circuits, etc. This method converts AC power through a transformer, rectifies and filters the DC voltage through a rectifier circuit, and adjusts the output voltage through voltage feedback to obtain high-precision DC voltage.