Encyclopedia Knowledge

What is Valve Type Lightning Arrester? Definition A lightning arrester that comprises single or multiple gaps connected in series with a current - controlling element is referred to as a lightning arrester. The gap between the electrodes blocks the flow of current through the arrester, except when t

What is Voltage Surge？ Definition Voltage surge is defined as a sudden and excessive rise in voltage that can damage the electrical equipment within an installation. Overvoltages in power lines occur due to an increase in voltage between phases or between a phase and ground. Voltage surges are mainl

Automatic Voltage Regulator The automatic voltage regulator (AVR) is an essential device designed to regulate voltage levels. It takes fluctuating voltages and converts them into a stable, constant voltage. Voltage fluctuations primarily occur due to variations in the load on the supply system. Such

Meaning and Working of Hybrid Stepper Motor The term “Hybrid” denotes a combination or mixture. A Hybrid Stepper Motor integrates the characteristics of both the Variable Reluctance Stepper Motor and the Permanent Magnet Stepper Motor. At the core of the rotor, an axial permanent magnet is incorpora

The permanent magnet stepper motor features a stator construction that closely resembles that of the single - stack variable reluctance motor. Its rotor, cylindrical in shape, is composed of permanent magnet poles made from high - retentivity steel. On the stator, the concentrating windings situated

Sequence Network Definition The sequence impedance network is defined as an equivalent balanced network for a balanced power system under a hypothetical operating condition, where only a single sequence component of voltage and current exists within the system. Symmetrical components play a crucial

Definition A negative sequence relay, also known as an unbalance phase relay, is designed to safeguard the electrical system against negative sequence components. Its primary function is to protect generators and motors from unbalanced loads, which typically arise due to phase - to - phase faults. W

Reluctance torque, also known as alignment torque, is a phenomenon experienced by ferromagnetic objects when placed within an external magnetic field. This torque acts to align the ferromagnetic object with the direction of the external magnetic field. When exposed to an external magnetic field, the

Definition An electrical drive system is defined as a mechanism designed to regulate the speed, torque, and direction of an electric motor. While each electrical drive system may possess unique characteristics, they also share several common features. Electrical Drive Systems The figure below illust

Definition A drive that utilizes electrical power to propel forward is known as an electric traction drive. One of the primary applications of an electric drive is the transportation of people and goods from one location to another. Traction drives are predominantly categorized into two types: the s

A chopper is a device that converts a fixed direct - current (DC) voltage into a variable DC voltage. Self - commutated devices, such as Metal - Oxide - Semiconductor Field - Effect Transistors (MOSFETs), Insulated - Gate Bipolar Transistors (IGBTs), power transistors, Gate - Turn - Off Thyristors (

Two Phase AC Servo Motor In a previous article, we've already explored servo motors. In this one, we'll focus on two - phase and three - phase AC servo motors. The stator of a two - phase AC servo motor is equipped with two distributed windings. These windings are electrically displaced from each ot