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

What is Hysteresis Loss?Hysteresis loss refers to the energy dissipation that occurs in ferromagnetic materials (such as iron cores) due to the hysteresis effect during the magnetization process. When the external magnetic field changes, the magnetization of the ferromagnetic material does not immediately follow the change in the magnetic field; instead, there is a lag. Specifically, when the magnetic field strength returns to zero, the magnetization does not completely return to zero but requir

Safety Systems to Prevent Grid-Tied Inverters from Supplying Power During Grid OutagesTo prevent grid-tied inverters from continuing to supply power to the grid during outages, several safety systems and mechanisms are typically employed. These measures not only protect the stability and safety of the grid but also ensure the safety of maintenance personnel and other users. Below are some common safety systems and mechanisms:1. Anti-Islanding ProtectionAnti-islanding protection is a critical tec

Factors Determining When to Start Grid Peaking UnitsThe timing for starting grid peaking units is primarily determined by multiple factors to ensure the stable operation and efficient use of resources in the power system. Below are the main factors that influence when to start peaking units:1. Load Demand Variations Peak Load Periods: During times when grid load reaches or approaches its peak (such as during working hours or summer air conditioning usage peaks), additional generation capacity is

How to Measure Gate LeakageMeasuring gate leakage typically refers to measuring the leakage current between the gate and source or drain in a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) or similar devices. Gate leakage is an important parameter for assessing device reliability and performance, especially in high-voltage and high-frequency applications. Below are some common methods and techniques for measuring gate leakage:1. Using a Precision Current Meter (Picoammeter)Precision

Differences Between Magnetic Monopoles and Electric Monopoles in Terms of FieldsMagnetic monopoles and electric monopoles are two important concepts in electromagnetism, and they exhibit significant differences in their field properties and behaviors. Below is a detailed comparison of these two types of monopoles in terms of their fields:1. Definitions and Physical BackgroundElectric Monopole: An electric monopole refers to an isolated point charge, either positive or negative. According to Coul

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

How to Prove that Active Power is the Power that Generates Mechanical Work, Not Reactive PowerTo prove that active power (Active Power, P) is the power that generates mechanical work, rather than reactive power (Reactive Power, Q), we can examine the physical principles of power systems and the nature of energy conversion. Below is a detailed explanation:1. Definitions of Active Power and Reactive PowerActive Power P: Active power refers to the actual electrical power consumed in an AC circuit t

Calculating the fault current (short-circuit current) on the secondary side of a transformer supplying a transmission line is a complex process that involves multiple parameters of the power system. Below are the steps and relevant formulas to help you understand how to perform this calculation. We will assume the system is a three-phase AC system, and the fault occurs on the transformer's secondary side.1. Determine System ParametersTransformer Parameters: Rated capacity of the transformer rate