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Shenzhen KINRI Energy Technology Co.,Ltd.

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· Why is there sound when the module power supply is working?

Sound can be heard by the human ear with frequencies ranging from 20-20kHz. Power audio noise refers to the vibration frequency of electronic and magnetic components generated during operation, which can produce audible signals within the range of human ear hearing. Below is a brief discussion on the main reasons why module power supplies produce sound during operation.AC DC POWER MODULEIn most flyback power converter applications, transformers are the main source of audio noise. The main reasons are as follows:Process issues with transformers:1. Inadequate impregnation and drying of the paint can cause the magnetic core to be unstable and cause mechanical vibration, resulting in noise.2. The length of the air gap is not suitable, resulting in unstable working conditions of the transformer and producing noise.3. The wire package was not tightly wound, resulting in noise.4. The magnetic core combination has an air gap, which causes air vibration and produces noise at high frequencies....
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05-23
2024
· The working principle and importance of linear regulated power supply

A linear regulated power supply is a device that converts unstable or irregular power sources into stable and regular output voltages. It is an indispensable component in many electronic devices and systems, such as computers, communication devices, and medical instruments. Below, we will provide a detailed analysis of the working principle of linear regulated power supplies and their importance in modern electronic devices.linear regulated power supply The basic working principle of linear regulated power supplyThe basic working principle of a linear regulated power supply can be summarized as: maintaining stable output voltage by adjusting the internal voltage or current of the power supply. Its core component is an electronic component called a linear regulator, which adjusts the current based on changes in output voltage to maintain stable output voltage.When the input voltage changes, the linear regulator will detect the change in output voltage and immediately adjust its interna...
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05-23
2024
· What is the reason for the low voltage output of the switching power supply?

The reason for low voltage output of switching power supply24V 20A 480W Switching Power Supply(1) The working voltage provided by the 220V AC voltage input and rectification filtering circuit to the switching tube is insufficient, exceeding the control range of the pulse width adjustment circuit.(2) The presence of overcurrent in the load circuit causes an increase in the load of the switching power supply, resulting in a decrease in output voltage.(3) Switching error on/off. When the scanning circuit first starts working, the power switch is in standby mode. This type of fault is applicable to machines without a backup power source. The CPU power source is taken from the same power source and not provided by a secondary power source.(4) The end of the on/off interface circuit is in a state between startup and standby due to a malfunction, resulting in the output voltage of the switch power supply being lower than the normal value and higher than the standby value.(5) The end of the p...
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05-22
2024
· Can the power adapter be continuously plugged into the socket for use?

In our daily lives, power adapters have become an indispensable part of our lives. It provides stable power for various electronic devices such as our phones, computers, tablets, etc., ensuring the normal operation of the devices. However, many people have doubts about whether the power adapter can be continuously plugged in. Today, let's discuss this topic.6W WALL AC DC ADAPTERFirstly, we need to understand the working principle of the power adapter. A power adapter is a device that converts AC power into DC power. It converts the input AC power into the stable DC power required by the device through internal circuits and transformers and other components. Therefore, when the device is connected to a power adapter, it is actually providing stable power to the device.So, can the power adapter be plugged in continuously? The answer is yes. Because of the working principle and design of the power adapter, it can always provide stable power to the device. Even if the device is fully char...
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05-22
2024
· Why does the charger still have current after unplugging the plug?

We may often encounter situations where when we unplug the charger plug from the socket, we can still feel the current by touching the metal part of the charger. This situation has raised concerns as there is a potential risk of electric shock due to sustained current. This article will explore the reasons why the charger is still charged after unplugging, and provide solutions to ensure safe use.1. Capacitor charging effectChargers often contain capacitors, which can store electrical energy. When we unplug the plug from the socket, the charge stored in the capacitor is not immediately released. This means that even if the plug is unplugged, the capacitor can still provide current for a short period of time, causing the charger to remain charged. This phenomenon is called the capacitor charging effect.2. Electromagnetic induction effectAnother possible reason is the electromagnetic induction effect. When we plug in the power adapter, the circuit in the adapter forms an electromagnetic...
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05-22
2024

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