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Shenzhen KINRI Energy Technology Co.,Ltd.

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· Why does a switch mode power supply need to be connected to a dummy load?

In the design and debugging process of electronic devices, many electronic engineers will encounter a situation where the switching power supply is connected to a dummy load. Although the advantage of doing so is to protect the power supply itself and improve the stability and reliability of the circuit, few people know the reason carefully. Therefore, the following will discuss this issue in detail.1. Why does a switching power supply need to be connected to a dummy load?When the switching power supply is working, if the load is not connected or the load is too light, it may cause the output voltage of the power supply to be too high, which can damage the power supply or other circuit components,Connecting dummy load can simulate real loads, allowing the switching power supply to operate stably even under no-load or light loads, avoiding excessive output voltage.2. What are the benefits of using a dummy load in a switching power supply?① Protecting power supplyIt can effectively prev...
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03-28
2024
· What is the difference between PC level and CB level dual power switch?

In many critical electric fields, the stable supply of electricity undoubtedly becomes the top priority to ensure smooth operation. For this reason, we often ensure the reliability of power supply by installing a dual power switch. When the main power supply is interrupted for some reason, this switch can quickly switch to the backup power supply, thereby avoiding the inconvenience and losses caused by power outages. The dual power switch market is full of options, with PC and CB grades being the most common. So, what is the difference between these two and how should we choose? Let's compare and analyze below.Let's first take a look at the concept:PC level: capable of connecting, carrying, but not used for breaking short-circuit currents.Choose a load switch without an overcurrent release as the actuator. It does not have a protective function, but it has a high tolerance and connection ability, which can ensure the safety of the switch itself and not be damaged due to overload or sh...
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03-28
2024
· What are the hazards of power harmonics?

Definition of Power HarmonicPower harmonics are distortions caused by non-linear loads causing voltage or current waveforms to deviate from sine. The waveform of harmonics is also a sine wave, but the harmonic frequency is an integral multiple of the fundamental frequency. So why is there the generation of harmonics? On the one hand, it is due to some problems with the power generation equipment, which may contain harmonics; On the other hand, it is because some nonlinear devices generate harmonics during operation, such as frequency converters, switching power supplies, welding machines, LED lights, displays, variable frequency household appliances, arc furnaces, etc. Nonlinear devices are currently the main cause of harmonic generation.The hazards of power harmonicsThe presence of power harmonics can have a certain impact on equipment and power systems, leading to equipment malfunction and system instability. The specific hazards mainly include the following:1. Affects the normal op...
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03-28
2024
· Four Common Faults and Solutions of LED Switch Power Supply

LED switch power supplies are widely used and ubiquitous in our daily lives and work. However, there may be some problems and malfunctions in the actual use of LED switch power supplies, which may cause damage to the power supply and LED lights. This article will introduce common faults and solutions of LED switch power supplies.1. Unstable output currentThe unstable output current of LED switch power supply is usually caused by damage to capacitors and power components, poor soldering of circuit boards, and other reasons, which can easily cause problems such as LED flashing and insufficient brightness.Solution: The fault can be resolved by replacing damaged components and capacitors, repairing or replacing the circuit board.2. Abnormal input and output voltageAbnormal input and output voltage may cause problems with the LED switch power supply. Excessive input voltage may damage power components, while insufficient input voltage may cause unstable output voltage. Abnormal output volt...
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03-28
2024
· The Causes and Suppression Methods of Switching Power Supply Noise

Switching power supplies are widely used in daily life and play an important control role in the use and management of electricity. The switch mode power supply, which is currently widely used in China, has certain advantages in many aspects and can meet the needs of modern power management. However, due to the influence of internal and external factors during use, it is easy to generate noise. This type of noise has a high frequency of occurrence and a significant impact, bringing certain negative impacts to people's work and life. Therefore, how to effectively reduce the noise of switching power supplies has become an urgent problem for relevant personnel to solve.The internal causes of switch mode power supply noise:(1) The noise generated during the use of a switching power supply. During the use of a switching power supply, factors such as current and resistance can instantly change, causing changes in the internal situation of the power supply. These changes are generally charac...
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03-28
2024

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Tel:+86-0755-29665062
Email:mkt1@jinruipower.com
Add: No. 13A16 Huafeng International Commercial Building, No.4018 Bao’an Avenue, Xixiang, Baoan District, Shenzhen China

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