Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

Pure Capacitor CircuitA circuit comprising only a pure capacitor with capacitanceC(measured in farads) is termed a Pure Capacitor Circuit. Capacitors store electrical energy within an electric field, a characteristic known ascapacitance(alternatively referred to as a "condenser"). Structurally, a capacitor consists of two conductive plates separated by a dielectric medium—common dielectric materials include glass, paper, mica, and oxide layers. In an ideal AC capacitor circuit, the cur

1. DefinitionWhat is commonly referred to as a "permanent capacitor" is likely a popular term. Strictly speaking, it may refer to a fixed capacitor. A fixed capacitor is a type of capacitor with a constant capacitance value. In a circuit, its capacitance will not change due to normal voltage, current variations, or other common external conditions. Its main functions include storing electrical energy, filtering, coupling, and bypassing.2. Structure and PrincipleStructureTake the common ceramic c

Why Energy Storage Capacitors Are Needed in Boost ConvertersIn a boost converter (step-up converter), energy storage capacitors (often referred to as output capacitors) play a crucial role. Their primary function is to smooth the output voltage, ensuring that the load receives a stable and continuous power supply. Below is a detailed explanation of why energy storage capacitors are necessary in boost converters:1. Smoothing the Output VoltageThe working principle of a boost converter involves pe

Capacitance Analyzer is a specialized instrument used to measure and analyze the performance of capacitors. It can measure key parameters such as capacitance, dissipation factor, equivalent series resistance (ESR), and more. Additionally, it evaluates the health status, frequency response, temperature characteristics, and other properties of capacitors. Capacitance analyzers are widely used in electronics manufacturing, maintenance, research and development (R&D), and quality control to ensu

Capacitors are indispensable electronic components in industrial automation systems, enhancing system stability and efficiency by storing and releasing electrical energy. Below are key applications of capacitors in industrial automation and how they improve system performance:1.Power Stabilization and Filtering Function: Capacitors are used in power circuits to smooth out voltage fluctuations and reduce noise and interference in the power supply. In devices such as variable frequency drives (VFD

Purpose of Oil Filling in High-Voltage CapacitorsFilling high-voltage capacitors with insulating oil (often referred to as impregnation or filling with insulation oil) serves multiple critical functions in power systems. Below are the primary roles and benefits of oil filling:1. Enhanced Insulation Performance Increased Dielectric Strength: Insulating oil has a high dielectric strength, effectively preventing electric field concentration and partial discharges within the capacitor. This improves

What is a Polyester Capacitor?A polyester capacitor, also known as a film capacitor or PET capacitor (Polyethylene Terephthalate Capacitor), is a type of capacitor that uses polyester material as its dielectric. Polyester capacitors are renowned for their excellent electrical performance, stable temperature characteristics, and long lifespan, making them widely used in various electronic devices.Working Principle of Polyester CapacitorsThe basic structure of a polyester capacitor includes two me

What is a Wet Electrolytic Capacitor?A wet electrolytic capacitor (Wet Electrolytic Capacitor) is a type of capacitor that uses a liquid electrolyte as its dielectric medium. Unlike dry capacitors, wet electrolytic capacitors contain a liquid electrolyte, typically composed of an aqueous solution or organic solvent. This electrolyte not only serves as the dielectric but also participates in electrochemical reactions, enhancing the performance of the capacitor. Wet electrolytic capacitors are wid

The Impact of Adding Filter Capacitors on Voltage Ripple in AC/DC ConvertersIn AC/DC converters, adding filter capacitors has a significant impact on voltage ripple. The primary role of filter capacitors is to smooth the pulsating DC voltage after rectification, reducing the AC components (i.e., ripple) in the output voltage and providing a more stable DC voltage. Below is a detailed explanation:1. What is Voltage Ripple?Voltage Ripple refers to the alternating current (AC) components that remai

Avoiding the use of capacitors in circuits with resistive loads is primarily due to the different electrical characteristics of capacitors and resistors, and their distinct behaviors and roles in circuits. Here are some of the main reasons:1. Energy Storage and ReleaseCapacitors: Capacitors are energy storage elements that can store charge and release it when needed. When charging, charge accumulates between two conductive plates, creating an electric field. When discharging, the charge is relea