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Shenzhen KINRI Energy Technology Co.,Ltd.

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· Factors to consider in the design of charging station power supply architecture

The architecture design of charging station power supply needs to consider multiple factors to ensure its reliable, efficient, and safe operation. Here are some key points that designers need to pay attention to:7KW Smart AC EV Charging Station1. Power input: The charging station needs to be designed according to the local voltage and frequency. For example, charging posts in Chinese Mainland are usually designed for 220V/50Hz or 380V/50Hz input voltage. We need to consider the stability of the power supply and whether it is necessary to equip a converter from AC to DC.2. Conversion efficiency: AC to DC converters require high conversion efficiency to reduce energy loss and improve energy efficiency.3. Overload protection: The charging station needs to have an appropriate overload protection mechanism to prevent damage caused by excessive current or voltage.4. Short circuit protection: Short circuit protection should be included in the design to prevent damage caused by electrical sho...
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06-06
2024
· Five common faults and solutions of variable frequency power supply

Variable frequency power supply is a power electronic device that can convert AC power from mains power into adjustable frequency AC power. It can adjust the output voltage and frequency according to needs, providing a stable and reliable power supply for equipment operation. However, in actual use, some faults are often encountered, and this article will introduce these faults and solutions.frequency power supply1. Short circuitThe causes of short circuit faults may include: short circuit in the connecting circuit, output terminal failure, or equipment failure. Check if there are any faults in the connection lines, power output terminals, and equipment itself. If so, repair or replace them in a timely manner.2. Unstable output voltageThe unstable output voltage may be caused by unstable power supply voltage, load changes, aging of internal components in the power supply, damage to output filtering capacitors, poor contact of motor coils, and other reasons.Therefore, it can be solved...
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06-06
2024
· How to reduce the output ripple and noise of switching power supplies?

The ripple of switching power supply mainly comes from five aspects: input low-frequency ripple, high-frequency ripple, common mode ripple noise caused by parasitic parameters, ultra-high frequency resonance noise generated during power device switching process, and ripple noise caused by closed-loop regulation control.250W Switching Power Supply1. Low frequency ripple is related to the filtering capacitor capacity of the output circuit. The capacity of a capacitor cannot increase indefinitely, resulting in residual low-frequency ripple output. After being attenuated by a DC/DC converter, the AC ripple exhibits low-frequency noise at the output of the switching power supply, which is determined by the ratio of the DC/DC converter and the gain of the control system. The ripple suppression of current controlled DC/DC converters is slightly improved compared to voltage controlled ones. But the low-frequency AC ripple at its output end is still relatively large. To achieve low ripple outp...
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06-05
2024
· Common Switching Power Supply Chips and Their Characteristics

Switching power supply is a high-efficiency and highly reliable power conversion technology widely used in various electronic devices. The switching power supply chip is the core component of the switching power supply, which determines the performance and characteristics of the switching power supply. In this article, we will introduce several common switching power supply chips and their characteristics.1. UC3842UC3842 is a classic current mode PWM controller chip. It has the following characteristics:● Internally integrated with functional modules such as oscillators, error amplifiers, PWM comparators, etc., the circuit design is simplified.● The working frequency can reach 500kHz, suitable for high-frequency switching power supplies.● It has a cycle by cycle current limiting function, which improves the reliability of the power supply.2.TL494TL494 is a dual output pulse width modulation chip. Its features include:● Internally integrated with two error ampli...
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06-04
2024
· The Disadvantages and Shortcomings of Switching Power Supplies

The Important Position of Switching Power SupplySwitching power supply is the core power supply component of many electronic devices. Widely used in various fields such as computers, communication equipment, consumer electronics, industrial control, etc., providing stable and reliable electricity for these devices.400W Switching Power SupplySecondly, switching power supplies have the characteristic of high efficiency, which can more effectively utilize electrical energy compared to traditional power sources, and are of great significance for energy conservation and reducing energy consumption. It has the advantages of small size and light weight, making it easy to integrate and install in various electronic devices, providing support for device miniaturization and portability.Finally, with the continuous development of electronic technology, the technology of switching power supplies is also constantly advancing and innovating, constantly driving the development and transformation of...
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06-03
2024

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