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In power systems and electronic devices, DC power supply (DC power supply) and AC power supply (AC power supply) are two common types of power supply. They each have their unique principles, application scenarios, and advantages and disadvantages. Below, we will delve into the basic principles and characteristics of these two types of power sources.The basic principle and advantages and disadvantages of DC power supplyBasic PrinciplesDC power supply, as the name suggests, refers to a power supply where current always flows in the same direction. In a DC power supply, the voltage or current remains constant and does not change over time. Common DC power sources include dry cells, solar panels, fuel cells, etc.AdvantageGood stability: The output voltage and current of DC power supply are relatively stable and not affected by frequency changes, making it suitable for devices that require stable power supply, such as communication equipment, computers, etc.Easy energy storage: DC power ca...
2024
Three phase AC power supply is a common form of power supply, widely used in industrial, commercial, and residential electricity fields. This article will provide a detailed introduction and analysis of the basic concepts, characteristics, application areas, and usage precautions of three-phase AC power supplies.1. Basic concepts of three-phase AC power supplyA three-phase AC power supply refers to a power system composed of three sine wave AC power supplies, with an equal phase difference between them, usually 120 degrees. The main parameters of a three-phase AC power supply include voltage, frequency, and phase difference. Among them, voltage refers to the magnitude of the output voltage of the power supply, frequency refers to the number of periodic changes in the shape of the AC wave output by the power supply, and phase difference refers to the time difference between the three power supply waveforms.2. Characteristics of three-phase AC power supplyEfficient and stable: The outpu...
In the field of electronic engineering, DC power supply testing is a crucial step in ensuring stable and reliable performance of power equipment. Among them, DC electronic loads, as an important testing equipment, are widely used in the field of power testing due to their high precision, adjustability, and flexibility. So, why can DC electronic loads accurately test DC power supplies? This article will provide a detailed analysis from the following aspects.The basic principle of DC electronic loadsDC electronic load is an electronic device that simulates the behavior of real loads, simulating various resistive, inductive, or capacitive loads by precisely controlling the working state of internal power components (such as resistors, inductors, etc.). It can adjust the resistance, current, voltage and other parameters of the load in real-time according to testing requirements to achieve comprehensive testing of the DC power supply.The necessity of DC power supply testingAs the core powe...
The stability and reliability of high-power DC power supplies are crucial in electronic devices and systems. However, interference sources that may exist in the power supply, such as electromagnetic interference (EMI) and radio frequency interference (RFI), can cause damage to the circuit, reduce performance, and even lead to system failures. To avoid these issues, we need to take a series of effective measures to eliminate interference sources. The following are several common methods:1. Good groundingGrounding is an important means of eliminating electrical interference. Proper grounding not only provides the required reference potential for the device, but also provides a low impedance path for the charge to flow back to the power source. In the design of high-power DC power supplies, it is usually necessary to connect the metal casing of the equipment, the grounding wire of the circuit board, and the grounding wire of the power cord to the same grounding point to ensure the ground...
In the field of LED lighting, the selection of power supply plays a crucial role in the performance and stability of the entire system. The selection of current and voltage is an important part of it. How to correctly choose the current and voltage of LED power supply is a concern for many people. Here, we will delve deeper into this topic and use practical examples to help everyone better understand.1. Understand the characteristics of LEDDifferent LED devices have specific current and voltage requirements.Example: For example, common white light LEDs typically require a voltage of around 3V and a current of several tens of milliamps.2. Determine current and voltage based on actual needsWhen brighter light is needed, an LED power supply with a higher current and appropriate voltage can be selected.Example: An indoor lighting system can choose a power supply that provides sufficient brightness.3. Consider power factors and stabilityThe higher the power factor, the higher the efficienc...